Pump module and wearable device

Abstract

The application provides a pump module and a wearable device. The pump module comprises an integrated seat, a first piezoelectric pump and a second piezoelectric pump. The integrated seat comprises a seat body and a vent nozzle. The seat body comprises a first mounting surface and a second mounting surface arranged oppositely. The first mounting surface is provided with a first gas inlet, and the second mounting surface is provided with a second gas inlet. The vent nozzle is fixed to the seat body and located on the side of the first mounting surface away from the second mounting surface. The seat body has a first air channel and a second air channel located between the first mounting surface and the second mounting surface. The first air channel is communicated with the first gas inlet and the vent nozzle. The first piezoelectric pump is fixed to the first mounting surface and communicated with the first gas inlet. The second piezoelectric pump is fixed to the second mounting surface and communicated with the second gas inlet. By integrating the first piezoelectric pump and the second piezoelectric pump to the first mounting surface and the second mounting surface of the integrated seat respectively, the pump module has the advantages of small noise, small size and large flow.

Description

Technical Field

[0001] This application relates to the field of wearable devices, specifically to a pump module and a wearable device. Background Technology

[0002] Traditional upper arm blood pressure monitors have large bladder volumes, requiring high-flow-rate pumps for inflation, typically using mechanical pumps. While mechanical pumps are a mature technology for traditional blood pressure monitors, they are noisy and bulky, reducing measurement comfort and limiting further reduction in device size. Piezoelectric pumps are quiet, but have lower flow rates. Using piezoelectric pumps in blood pressure monitors with larger bladders requires solving the technical challenge of insufficient flow. Therefore, a low-noise, compact, and high-flow-rate inflation device needs to be designed. Summary of the Invention

[0003] The purpose of this application is to provide a pump module and a wearable device including the pump module, wherein the pump module integrates at least two piezoelectric pumps, and is characterized by low noise, small size and large flow rate.

[0004] In a first aspect, this application provides a pump module, including an integrated base, a first piezoelectric pump, and a second piezoelectric pump. The integrated base includes a base body and an air nozzle. The base body includes a first mounting surface and a second mounting surface disposed opposite to each other. The first mounting surface has a first air inlet, and the second mounting surface has a second air inlet. The air nozzle is fixed to the base body and located on the side of the first mounting surface opposite to the second mounting surface. The base body has a first air passage and a second air passage located between the first mounting surface and the second mounting surface. The first air passage connects the first air inlet and the air nozzle, and the second air passage connects the second air inlet and the air nozzle. The ratio of the length of the first air passage to the length of the second air passage is in the range of 0.9 to 1.1. The first piezoelectric pump is fixed to the first mounting surface and connected to the first air inlet. The second piezoelectric pump is fixed to the second mounting surface and connected to the second air inlet.

[0005] In this application, multiple piezoelectric pumps are designed, also known as cascaded piezoelectric pumps. By cascading multiple piezoelectric pumps, simultaneous inflation is possible, significantly increasing the flow rate of the pump module and enabling high-flow-rate applications, such as those required by an upper arm blood pressure monitor. By setting the length of the gas transmission path in the first airway to be equal to or minimally different from the length of the gas transmission path in the second airway, the flow resistance encountered by the gas in the first airway is minimized compared to that in the second airway. Consequently, the gas pressure transmitted from the first airway to the manifold is less different from that transmitted from the second airway, improving the gas output stability of the pump module. Since piezoelectric pumps are inherently quiet, the pump module provided in this application achieves high flow rate with quiet operation and no vibration.

[0006] In some possible implementations, the first airway includes a first part and a second part that are connected. The cross-sectional area of ​​the first part remains unchanged, the cross-sectional area of ​​the second part is different from that of the first part, and the ratio of the length of the second part to the length of the first airway is less than or equal to 0.1.

[0007] In this implementation, by setting the ratio of the length of the second part to the length of the first part, the variable cross-section of the first air passage is reduced, thereby avoiding excessive flow resistance in the transmission of gas in the first air passage, reducing pressure loss, and improving the stability of the pump module's output gas.

[0008] In some possible implementations, the absolute value of the difference between the length of the first airway and the length of the second airway is less than or equal to 2 mm.

[0009] In this implementation, by setting the difference between the length of the first air passage and the length of the second air passage, the deviation between the length of the gas transmission path in the first air passage and the length of the gas transmission path in the second air passage can be small. This results in a smaller difference between the flow resistance encountered by the gas in the first air passage and the flow resistance encountered by the gas in the second air passage. Consequently, the gas pressure transmitted from the first air passage to the confluence channel is smaller than the gas pressure transmitted from the second air passage to the confluence channel, thus improving the gas output stability of the pump module.

[0010] In some possible implementations, the height of the first air passage in the thickness direction of the seat body is in the range of 0.2 mm to 0.5 mm, and the width of the first air passage is in the range of 1 mm to 2 mm.

[0011] In this implementation, by setting the height and width of the first air passage, it is possible to ensure the cross-sectional area of ​​the first air passage to prevent excessive flow resistance while reducing the space occupied by the first air passage in the thickness direction of the base. This is beneficial for the lightweight design of the base, thereby reducing the thickness of the pump module.

[0012] In some possible implementations, the extension path of the first airway includes at least two straight segments and at least one curved segment, with adjacent straight segments smoothly connected by the curved segment.

[0013] In this implementation, by smoothly connecting two adjacent straight segments with a curved segment, the connection between the two adjacent straight segments can be smooth without right angles. This reduces the flow resistance of the gas during the process of being transported from one straight segment to another adjacent straight segment in the first air passage. This reduces the flow loss of the gas when changing the transmission direction in the first air passage, and increases the gas pressure when the gas is transported through the first air passage to the confluence channel, which is beneficial to the stable gas output of the pump module.

[0014] In some other possible implementations, the extension path of the first airway includes a straight segment and at least one curved segment.

[0015] In this implementation, the straight segment can be directly connected to the first gas inlet or the converging channel to reduce the pressure loss when gas flows from the first gas inlet into the first gas passage or when gas flows from the first gas passage into the converging channel. Alternatively, one end of the straight segment can be smoothly connected to the first gas inlet via a curved segment, and the other end of the straight segment can be smoothly connected to the converging channel via a curved segment to reduce the pressure loss when gas flows from the first gas inlet into the first gas passage and changes its transmission direction, and also to reduce the pressure loss when gas flows from the first gas passage into the converging channel and changes its transmission direction.

[0016] In some other possible implementations, the extension path of the first airway is in the shape of a spline curve.

[0017] In this implementation, the spline curve design minimizes the flow resistance of gas within the first air passage, reduces pressure loss when gas flows into the first air passage from the first inlet and changes direction, and minimizes pressure loss when gas flows into the confluence channel from the first air passage and changes direction, thus improving the gas output performance of the pump module. The spline curve is a smooth curve, and the arc is a special type of spline curve; therefore, the fact that at least part of the extension path of the first air passage is arc-shaped also falls within the scope of this application.

[0018] In some possible implementations, there are multiple first piezoelectric pumps, and the number of first air inlets and first air passages is the same as the number of first piezoelectric pumps, with one first piezoelectric pump corresponding to one first air inlet and one first air passage. Alternatively, there are multiple second piezoelectric pumps, and the number of second air inlets and second air passages is the same as the number of second piezoelectric pumps, with one second piezoelectric pump corresponding to one second air inlet and one second air passage.

[0019] In this implementation, by setting multiple first piezoelectric pumps and / or multiple second piezoelectric pumps, the air output of the pump module can be increased, and the flow rate of the pump module can be increased.

[0020] The number of first piezoelectric pumps is less than or equal to the number of second piezoelectric pumps, so that the base has sufficient and flexible arrangement space on the side of its first mounting surface facing away from the second mounting surface to arrange the vent nozzles, thereby improving the space utilization of the pump module, improving the integration of the pump module, and thus facilitating the miniaturization of the pump module while achieving a large flow rate.

[0021] In this design, the orthographic projection of all the first piezoelectric pumps on the second mounting surface falls within the area occupied by all the second piezoelectric pumps on the second mounting surface. This ensures that the first piezoelectric pumps do not occupy a large portion of the base within the plane of the first mounting surface, thus improving the space utilization of the base. The area occupied by all the second piezoelectric pumps on the second mounting surface refers to the orthographic projection of the area formed by the sequentially connected outermost edges of all the second piezoelectric pumps on the second mounting surface.

[0022] In some possible implementations, the absolute value of the difference between the oscillation frequency of the first piezoelectric pump and the oscillation frequency of the second piezoelectric pump is less than or equal to 0.6 kHz.

[0023] In this implementation, setting the frequency of the control signal to be close to the optimal operating frequency of the first and second piezoelectric pumps can improve the consistency of the gas output between the first and second piezoelectric pumps, thereby facilitating the linear increase of the gas pressure output from the pump module to the required pressure value.

[0024] In some possible implementations, the base includes a first base and a second base with a sealed connection. The first base has a first mounting surface and has a first strip groove, a second strip groove, and a first manifold groove facing the second base. One end of the first strip groove is connected to a first air inlet, and the other end of the first strip groove is connected to the first manifold groove. One end of the second strip groove is connected to the first manifold groove. The second base has a second mounting surface. The second base has a third strip groove, a fourth strip groove, and a second manifold groove facing the first base. One end of the third strip groove is connected to the second manifold groove. One end of the fourth strip groove is connected to a second air inlet, and the other end of the fourth strip groove is connected to the second manifold groove. The first strip groove and the third strip groove cooperate to form a first air passage. The second strip groove and the fourth strip groove cooperate to form a second air passage. The first manifold groove and the second manifold groove cooperate to form a manifold channel, and the manifold channel is connected to a vent.

[0025] In this implementation, by creating strip grooves on the first and second seats and then combining them into an air passage, the processing of the first and second seats and the air passage is facilitated, thereby improving the yield of the integrated seat.

[0026] In this embodiment, the first and second air inlets are staggered, and the portion of the first air passage between the first air inlet and the confluence channel is separated from the portion of the second air passage between the second air inlet and the confluence channel. In this implementation, by separating the portions of the first and second air passages outside the confluence channel, the gas in the first and second air passages can be prevented from converging before entering the confluence channel, thereby reducing flow resistance before entering the confluence channel and preventing eddies and turbulence from forming between the gas in the first and second air passages before entering the confluence channel, which is beneficial for the stable output of the pump module.

[0027] In some possible implementations, the second unit also has a dispensing groove, which is separated from the third strip groove and also separated from the fourth strip groove.

[0028] In this implementation, the dispensing groove is used to apply adhesive to bond the second seat to the first seat, thereby improving the sealing performance after the first seat and the second seat are connected, and thus improving the sealing performance of the integrated seat.

[0029] The dispensing groove is arranged around the third and fourth strip grooves, which facilitates the sealing of the first and second air passages. Alternatively, the dispensing groove can be arranged around the entire outer periphery of the third and fourth strip grooves, or it can be located in the interval area between the third and fourth strip grooves, or a portion of the dispensing groove can be arranged around the entire outer periphery of the third and fourth strip grooves, with the remaining portion located in the interval area between the third and fourth strip grooves.

[0030] The second unit also includes a column, one end of which is fixedly connected to the bottom wall of the dispensing groove, and the other end of which is attached to the surface of the first unit facing the second unit. The column is located in the area enclosed by the first strip groove, the area enclosed by the second strip groove, and the interval area between the first and second strip grooves. In this implementation, the column design avoids an excessively large area of ​​adhesive application in the dispensing groove, which facilitates the uniform distribution of adhesive and improves the bonding and sealing effect between the first and second units.

[0031] In some other possible implementations, the first seat has a dispensing groove that is separated from the first strip groove and also separated from the second strip groove.

[0032] In this implementation, the adhesive groove is used to apply adhesive to bond the first and second seats together, thereby improving the sealing performance after the first and second seats are connected, and thus improving the sealing performance of the integrated seat. Furthermore, the second seat may also be equipped with a column, and the arrangement is the same as in the implementation where the first seat has both an adhesive groove and a column.

[0033] In some possible implementations, the pump module also includes a sealing ring, which is located between the first mounting surface and the first piezoelectric pump, and seals the connection between the housing and the first piezoelectric pump, and surrounds the first air inlet.

[0034] In this implementation, the sealing ring seals the first air inlet and the vent, which can prevent gas from overflowing when the first piezoelectric pump discharges gas to the first air inlet, improve the airtightness at the junction of the vent and the first air inlet, and improve the effect of the first piezoelectric pump discharging gas to the first seat.

[0035] The outer periphery of the sealing ring may be provided with sealant. The sealant is used to fix the first mounting surface and the surface of the first piezoelectric pump facing the first seat, so as to cooperate with the sealing ring to seal the first piezoelectric pump and the first seat, thereby improving the sealing effect between the first piezoelectric pump and the first seat. Alternatively, the sealant may also be partially located on the inner side of the sealing ring, between the sealing ring and the first mounting surface, or between the sealing ring and the first piezoelectric pump.

[0036] In some possible implementations, the pump module also includes a vibration isolation layer, which abuts between the first mounting surface and the first piezoelectric pump. The vibration isolation layer is made of a flexible or elastic material.

[0037] In this implementation, a vibration isolation layer is provided between the first piezoelectric pump and the first base to reduce or even eliminate the vibration transmitted to the first base during operation. Similarly, a vibration isolation layer between the second piezoelectric pump and the second base can also reduce or even eliminate the vibration transmitted to the second base during operation. This reduces or even eliminates the interference between the vibrations of the first and second piezoelectric pumps, thereby improving the consistency of their operation and enhancing the gas output stability of the pump module. Furthermore, the vibration isolation layer also reduces the noise of the first piezoelectric pump during operation, further reducing the noise of the pump module and improving the user experience.

[0038] The vibration isolation layer can be a single, continuous layer or multiple spaced components. The vibration isolation layer can be, but is not limited to, foam, gel-like materials, etc. For example, the thickness of the vibration isolation layer is less than 1 mm; for instance, the thickness can be, but is not limited to, 0.9 mm, 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm, or other values ​​less than 1 mm.

[0039] In some possible implementations, the base body is provided with a mounting groove, the opening of which is located on the first mounting surface, and the mounting groove surrounds the first air inlet. The pump module also includes a sealing ring, which is disposed within the mounting groove and surrounds the first air inlet, and the sealing ring provides a sealing connection between the base body and the first piezoelectric pump.

[0040] In this implementation, the mounting groove can accommodate the sealing ring to reduce the overall thickness after the first base and the first piezoelectric pump are fixedly connected, thereby reducing the overall thickness of the pump module and facilitating a thinner and lighter design for the pump module. The sealing ring seals the first air inlet and the vent, preventing gas leakage when the first piezoelectric pump discharges gas to the first air inlet, improving the airtightness at the junction of the vent and the first air inlet, and enhancing the efficiency of the first piezoelectric pump discharging gas to the first base.

[0041] The outer periphery of the sealing ring is provided with sealant, which is located in the mounting groove. The sealant is fixedly connected to the bottom of the mounting groove and the surface of the first piezoelectric pump facing the first seat, so as to cooperate with the sealing ring to seal the connection between the first piezoelectric pump and the first seat, thereby improving the sealing effect between the first piezoelectric pump and the first seat.

[0042] In some possible implementations, the pump module also includes a vibration isolation layer, which is located in the mounting groove and abuts against the bottom of the mounting groove and the first piezoelectric pump. The vibration isolation layer is made of a flexible or elastic material.

[0043] In this implementation, by setting a vibration isolation layer, a buffer area is provided between the first piezoelectric pump and the first base, which can reduce the noise of the first piezoelectric pump when it is working, which is conducive to further quieting the pump module and improving the user experience.

[0044] The vibration isolation layer can be a single, continuous layer or multiple spaced sections. A sealing ring is located within the mounting groove, between the bottom of the groove and the first piezoelectric pump, and surrounds the first air inlet to improve the airtightness at the junction of the air inlet and the first air outlet. Sealant is applied to the outer periphery of the sealing ring, fixing the bottom of the mounting groove to the surface of the first piezoelectric pump facing the first base, thus improving the sealing effect between the first piezoelectric pump and the first base. The vibration isolation layer abuts against the bottom of the mounting groove and the first piezoelectric pump, and is located on the outer periphery of the sealant to reduce the thickness of the pump module, facilitating a thinner and lighter pump module design. Specifically, "the vibration isolation layer abuts against the bottom of the mounting groove and the first piezoelectric pump" means that one side of the vibration isolation layer is attached to the bottom of the mounting groove, and the other side is attached to the surface of the first piezoelectric pump facing the first base.

[0045] In some possible implementations, the first piezoelectric pump has a vent that connects to the first air inlet. The integrated base also includes a limiting platform, which is fixed to the base body and protrudes relative to the first mounting surface. The limiting platform is located on the periphery of the first piezoelectric pump and has a clearance groove that avoids the vent.

[0046] In this implementation, the vent of the first piezoelectric pump is located in the clearance groove to avoid the vent.

[0047] In some possible implementations, the first piezoelectric pump also has a vent, an air inlet, and at least two venting channels, with the vent connected to the first air supply port. When the pump module is inflated, the air inlet is connected to the vent, and the vent is isolated from the at least two venting channels. Gas flows out sequentially through the air inlet, the vent, the first air supply port, the first air passage, and the vent nozzle. When the pump module is deflated, the vent is connected to the at least two venting channels, and the air inlet is isolated from the vent. Gas leaks out sequentially through the vent nozzle, the first air supply port, the first air passage, the vent, and the at least two venting channels.

[0048] In this implementation, providing at least two venting channels accelerates venting, ensuring both measurement comfort and safety. Furthermore, the design with at least two venting channels eliminates the need for additional space in the device, facilitating the miniaturization of the first piezoelectric pump. Because the first piezoelectric pump has at least two venting channels, the inability to vent is prevented if a single venting channel fails.

[0049] In some possible implementations, the first piezoelectric pump includes a front chamber, a piezoelectric vibrator, and a rear chamber stacked sequentially. The front chamber includes a base, a venting channel layer, and a ventilation layer. The base has an air inlet for receiving gas generated by the vibration of the piezoelectric vibrator. A gas film is located on the side of the base away from the piezoelectric vibrator, and the gas film has a first through hole. The venting channel layer is located on the side of the venting film away from the base, and the venting channel layer has a second through hole and at least two venting channels located around the second through hole. The venting channels are spaced apart from the second through hole, and at least a portion of the venting channels connects to the outside of the first piezoelectric pump. The ventilation layer is located on the side of the venting channel layer away from the venting film, and the ventilation layer has a vent that connects to the second through hole. When the pump module is inflated, gas enters the base through the air inlet, pushes the venting film to bend towards the venting channel layer, and flows out sequentially through the first through hole, the second through hole, and the vent. When the pump module vents, the gas enters the second through hole through the vent, the gas pushes the vent membrane to bend toward the base, and it is released through at least two vent channels.

[0050] In this implementation, the second through hole is connected to or separated from at least two venting channels by the bending deformation of the venting membrane. The at least two venting channels do not require power; they only need to cooperate with the flexible venting membrane to open and close the venting function under pressure difference.

[0051] In some possible implementations, the base includes a substrate and a first protrusion. The substrate has a groove facing the venting membrane, and the first protrusion protrudes from the bottom wall of the groove. An air vent surrounds the first protrusion and penetrates the bottom wall of the groove. The venting membrane includes a membrane body and a second protrusion. The membrane body is located on the side of the base away from the piezoelectric vibrator and covers the groove. The second protrusion protrudes from the surface of the membrane body facing the base and abuts against the first protrusion. A first through-hole penetrates the membrane body and the second protrusion, and the opening of the first through-hole near the base is blocked by the first protrusion. When the pump module is inflated, gas enters the groove through the air vent, and the gas pushes the venting membrane to bend toward the second through-hole. The second protrusion disengages from the first protrusion, the first through-hole connects to the groove, and the venting membrane abuts against the venting channel layer. The second through-hole is separated from the venting channel. When the pump module vents, the gas enters the second through hole through the vent. The gas pushes the venting membrane to bend toward the groove. The second boss abuts against the first boss. The first through hole is separated from the groove. The part of the venting membrane corresponding to the venting channel and the second through hole is separated from the venting channel layer. The second through hole connects to the venting channel.

[0052] In this implementation, the first protrusion of the base overlaps with the second protrusion of the vent membrane to isolate the air inlet and the vent outlet. The small contact area between the base and the vent membrane allows for greater pressure exerted between the vent membrane and the base during venting, resulting in better isolation of the air inlet and improved stability. Furthermore, due to the small contact area, during inflation, the gas near the air inlet on the vent membrane more easily moves the portion of the vent membrane near the first protrusion towards the vent outlet, facilitating the connection between the air inlet and the vent outlet and improving inflation efficiency.

[0053] In some possible implementations, the venting channel layer includes a first surface, a second surface, and a side surface. The first surface faces the ventilation layer, the second surface is opposite to the first surface, and the side surface connects the first and second surfaces. The venting channel includes a first vent hole and a first vent groove, with the first vent hole penetrating through the first and second surfaces. The first vent groove is recessed in the first or second surface, with one end connected to the first vent hole and the other end penetrating through the side surface to form a vent. The cross-sectional area of ​​the first vent hole is larger than the cross-sectional area of ​​the first vent groove.

[0054] In this implementation, when the first vent groove is recessed on the first surface, the opening of the first vent groove facing the ventilation layer can be sealed by the venting channel layer fitting against the ventilation layer. The side of the venting channel layer away from the ventilation layer at the first vent groove does not need to be sealed, improving the airtightness of the venting channel and facilitating stable venting. When the first vent groove is recessed on the second surface, it has an opening facing the venting membrane. When the first piezoelectric pump vents, the venting membrane bends towards the base, allowing both the first vent hole and the first vent groove to be exposed simultaneously. This allows the vented gas to enter both the first vent hole and the first vent groove at the same time, thereby increasing the venting flow rate and venting efficiency. The flow cross-sectional area of ​​the first vent hole is larger than that of the first vent groove, allowing the gas to quickly enter the first vent hole and act as a buffer when the first piezoelectric pump vents. Furthermore, the gas flow velocity is increased when the gas flows from the first vent hole with a larger flow cross-sectional area to the first vent groove with a smaller flow cross-sectional area, thus increasing the venting speed.

[0055] In some possible implementations, the venting channel includes a first vent and a second vent, both of which penetrate the first and second surfaces. One end of the second vent is connected to the first vent, and the other end of the second vent penetrates the side to form a vent. The flow cross-sectional area of ​​the first vent is larger than that of the second vent.

[0056] In this implementation, both the first and second vent holes penetrate the first and second surfaces, increasing the channel size of the venting channel and thus improving the venting speed. Furthermore, the second vent hole has an opening facing the venting membrane. When the first piezoelectric pump vents, the venting membrane bends towards the base, allowing both the first and second vent holes to be exposed simultaneously. This allows the vented gas to enter both vent holes at the same time, increasing the venting flow rate and efficiency. The cross-sectional area of ​​the first vent hole is larger than that of the second vent hole, enabling the gas to quickly enter and buffer when the first piezoelectric pump vents. Additionally, the flow velocity of the gas increases as it flows from the larger cross-sectional area of ​​the first vent hole to the smaller cross-sectional area of ​​the second vent hole, further enhancing the venting speed.

[0057] In some possible implementations, the venting channel layer includes a venting body layer and at least two extensions. The extensions are located on the outer periphery of the venting body layer, which includes a first surface, a second surface, and a side surface. The first surface faces the ventilation layer, and the first and second surfaces are positioned opposite each other. The side surface connects the first and second surfaces. The number of extensions is the same as the number of venting channels, with one extension corresponding to one venting channel. Each venting channel includes a first vent hole, a first vent groove, and a third vent hole connected in sequence. The first vent hole penetrates both the first and second surfaces, the first vent groove is recessed into either the first or second surface, and the third vent hole penetrates the extension in the direction from the first surface to the second surface. The cross-sectional area of ​​the first vent hole is larger than the cross-sectional area of ​​the first vent groove.

[0058] In this implementation, the extension protrudes beyond the first piezoelectric pump relative to the venting body layer. The third vent penetrates the extension and forms two vents facing away from each other on the two opposite sides of the extension. This reduces the risk of vent blockage and improves venting efficiency. When the first vent groove is recessed on the first surface, the opening of the first vent groove facing the ventilation layer can be sealed by the venting channel layer fitting against the ventilation layer. The side of the venting channel layer facing away from the ventilation layer at the first vent groove does not need to be sealed, improving the airtightness of the venting channel and facilitating stable venting. When the first vent groove is recessed on the second surface, it has an opening facing the venting membrane. When the first piezoelectric pump vents, the venting membrane bends towards the base, allowing the first vent hole and the first vent groove to be exposed simultaneously. This allows the vented gas to enter both the first vent hole and the first vent groove at the same time, increasing the venting flow rate and venting efficiency. The cross-sectional area of ​​the first vent hole is larger than that of the first vent groove, so that when the first piezoelectric pump vents, the gas can quickly enter the first vent hole and act as a buffer. Furthermore, when the gas flows from the first vent hole with a larger cross-sectional area to the first vent groove with a smaller cross-sectional area, the flow velocity of the gas can be increased, thereby increasing the venting speed.

[0059] In some possible implementations, the venting channel includes a first vent, a second vent, and a third vent connected in sequence. The first and second vents penetrate the first and second surfaces, and the third vent extends through the first surface in the direction from the second surface. The cross-sectional area of ​​the first vent is larger than that of the second vent.

[0060] In this implementation, both the first and second vent holes penetrate the first and second surfaces, increasing the channel size of the venting channel and thus improving the venting speed. Furthermore, the second vent hole has an opening facing the venting membrane. When the first piezoelectric pump vents, the venting membrane bends towards the base, allowing both the first and second vent holes to be exposed simultaneously. This allows the vented gas to enter both vent holes at the same time, increasing the venting flow rate and efficiency. The cross-sectional area of ​​the first vent hole is larger than that of the second vent hole, enabling the gas to quickly enter and buffer when the first piezoelectric pump vents. Additionally, the flow velocity of the gas increases as it flows from the larger cross-sectional area of ​​the first vent hole to the smaller cross-sectional area of ​​the second vent hole, further enhancing the venting speed.

[0061] Secondly, this application also provides a wearable device, which includes a main body and a fixing strap. The main body includes a pump module as described in any of the above claims. The fixing strap includes an airbag, and the pump module is used to inflate the airbag.

[0062] In some possible implementations, the main components also include a controller, a first drive circuit, and a second drive circuit. The first drive circuit and the second drive circuit are connected in parallel and both are electrically connected to the controller. The first drive circuit is electrically connected to the first piezoelectric pump, and the second drive circuit is electrically connected to the second piezoelectric pump. The controller controls the first drive circuit to drive the first piezoelectric pump and controls the second drive circuit to drive the second piezoelectric pump through the same control signal.

[0063] In this implementation, the controller controls multiple drive circuits through the same control signal. At this time, the multiple drive circuits simultaneously drive multiple piezoelectric pumps according to the same control signal, thereby improving the consistency of the gas output from the multiple piezoelectric pumps and contributing to the stable inflation of the pump module. Furthermore, by setting multiple drive circuits in parallel, the supply current to a single piezoelectric pump can be reduced, facilitating the selection of the appropriate piezoelectric pump.

[0064] In some possible implementations, the main body also includes a pressure sensor and an air circuit adapter. The pressure sensor is electrically connected to the controller. The channel within the air circuit adapter has a first end and a second end positioned opposite each other. The first end connects to a vent, and the second end includes a first side and a second side positioned opposite each other. The first side connects to the airbag, and the second side connects to the pressure sensor. The pressure sensor is used to detect the current air pressure value of the pump module inflating the airbag and transmit it to the controller.

[0065] In this implementation, a pressure sensor detects the current pressure of the gas inside the airbag when the pump module is operating and transmits this information to the controller. The controller then adjusts the duty cycle of the control signal based on the current pressure value. By setting up an air path adapter, a gas channel can be created between the pump module and the airbag, allowing for more flexible setting of their relative positions. This gas channel also provides a buffer space for the airflow to accommodate the pressure sensor, which is located at the second end. By placing the pressure sensor and the vent at spaced ends of the air path adapter, rapid collisions between the gas flowing from the vent and the pressure sensor are prevented, thus avoiding damage to the pressure sensor due to excessively high gas flow rates.

[0066] In some possible implementations, the controller is used to adjust the duty cycle of the control signal according to the current air pressure value so that the current air pressure value changes linearly with the pressure rise over time.

[0067] In this implementation, by adjusting the duty cycle of the control signal through the controller, the current air pressure value can be made to change linearly with time, and the linear slope of the current air pressure value changing with time is stable, which is beneficial to the accuracy of blood pressure detection.

[0068] In some possible implementations, a detection airway is provided on the second side, the detection airway having at least one bend in its path, and the detection airway connecting the channel within the airway adapter to the air pressure sensor.

[0069] In this implementation, since the detection airway has at least one bend, the gas slows down after flowing into the bend, thereby reducing the flow rate of the gas towards the pressure sensor, which is beneficial to the accuracy of the pressure sensor in detecting air pressure. Attached Figure Description

[0070] Figure 1 This is a schematic diagram of the structure of the wearable device provided in some embodiments of this application;

[0071] Figure 2 yes Figure 1 An exploded view of part of the structure of the wearable device shown.

[0072] Figure 3A yes Figure 1A schematic diagram of the internal structure of the main body of the wearable device shown;

[0073] Figure 3B yes Figure 3A A structural schematic diagram of the main body shown from another perspective;

[0074] Figure 4 yes Figure 3A The diagram shows a schematic block diagram illustrating the connection of the main body in some embodiments of the wearable device.

[0075] Figure 5A yes Figure 1 A schematic diagram of the pump module in some embodiments of the wearable device shown;

[0076] Figure 5B yes Figure 5A A schematic diagram of the pump module shown from another perspective;

[0077] Figure 6 yes Figure 5A An exploded 3D view of the pump module shown.

[0078] Figure 7 yes Figure 6 A schematic diagram of the integrated base shown from another perspective;

[0079] Figure 8A yes Figure 6 An exploded three-dimensional diagram of the integrated base shown;

[0080] Figure 8B yes Figure 8A A schematic diagram of the integrated base shown from another perspective;

[0081] Figure 9A yes Figure 6 The diagram shows the integrated base cut along line AA.

[0082] Figure 9B yes Figure 6 The diagram shows the integrated base cut along line BB.

[0083] Figure 10A yes Figure 5A The diagram shows a partial structural schematic of the pump module cut along line CC in some embodiments.

[0084] Figure 10B yes Figure 10A The diagram shows a pump module equipped with a sealing ring.

[0085] Figure 10C yes Figure 10A The diagram shows a pump module with a vibration isolation layer.

[0086] Figure 11A yes Figure 5A The diagram shows a partial structural schematic of the pump module cut along the CC line in some other embodiments.

[0087] Figure 11B yes Figure 11A The diagram shows a pump module with a vibration isolation layer.

[0088] Figure 12A yes Figure 4 The diagram shows the pressurization of the gas inside the airbag when the pump module is working.

[0089] Figure 12B yes Figure 4 The diagram shows the slope change of the gas pressure rise inside the airbag when the pump module is working.

[0090] Figure 13 yes Figure 2 The diagram shows the structure of the gas path adapter in some embodiments of the main body.

[0091] Figure 14 yes Figure 1 A schematic diagram of a partial cross-sectional structure of the main body of the wearable device at the air circuit adapter.

[0092] Figure 15A yes Figure 13 An exploded three-dimensional view of the air passage adapter shown.

[0093] Figure 15B yes Figure 15A A schematic diagram of the air passage adapter shown from another perspective;

[0094] Figure 16A yes Figure 5A A schematic diagram of the structure of the first piezoelectric pump in some embodiments of the pump module shown;

[0095] Figure 16B yes Figure 16A A schematic diagram of the first piezoelectric pump from another perspective;

[0096] Figure 17 yes Figure 16B An exploded three-dimensional schematic diagram of the first piezoelectric pump is shown.

[0097] Figure 18A yes Figure 17 The diagram shows the structure of the front chamber in some embodiments of the first piezoelectric pump.

[0098] Figure 18B yes Figure 18A A three-dimensional exploded view of the anterior cavity shown;

[0099] Figure 19A yes Figure 17 The diagram shows the structure of the front chamber in the first piezoelectric pump in some other embodiments;

[0100] Figure 19B yes Figure 19A A three-dimensional exploded view of the anterior cavity shown;

[0101] Figure 20 yes Figure 19A The diagram shows the structural schematic of the base in the front cavity in some embodiments;

[0102] Figure 21 yes Figure 19A The diagram shows the structure of the venting membrane in the anterior cavity in some embodiments.

[0103] Figure 22A yes Figure 19A The diagram shows a partial structural schematic of the anterior cavity cut along line DD in some embodiments.

[0104] Figure 22B yes Figure 22A The diagram shows the structure when the anterior chamber is inflated.

[0105] Figure 22C yes Figure 22A The diagram shows the structure when the anterior chamber is deflating.

[0106] Figure 23A yes Figure 19A The diagram shows a structural schematic of the air venting channel layer in the anterior cavity in some embodiments;

[0107] Figure 23B yes Figure 23A A schematic diagram of the structure of the venting channel layer cut along line EE;

[0108] Figure 24A yes Figure 19A The diagram shows a structural schematic of the air venting channel layer in the anterior cavity in some other embodiments;

[0109] Figure 24B yes Figure 24A The diagram shows a cross-section of the venting channel layer along line FF.

[0110] Figure 25A yes Figure 19A A schematic diagram of the structure of the air venting channel layer in the anterior cavity in some other embodiments is shown;

[0111] Figure 25B yes Figure 25A A schematic diagram of the structure of the venting channel layer cut along line GG;

[0112] Figure 26A yes Figure 19A A schematic diagram of the structure of the air venting channel layer in the anterior cavity in some other embodiments is shown;

[0113] Figure 26B yes Figure 26A A schematic diagram of the structure of the venting channel layer cut along line HH;

[0114] Figure 27A yes Figure 19A A schematic diagram of the structure of the air venting channel layer in the anterior cavity in some other embodiments is shown;

[0115] Figure 27B yes Figure 27A A schematic diagram of the structure of the venting channel layer cut along line II;

[0116] Figure 28A yes Figure 19A A schematic diagram of the structure of the air venting channel layer in the anterior cavity in some other embodiments is shown;

[0117] Figure 28B yes Figure 28A The diagram shows a cross-section of the venting channel layer along line JJ. Detailed Implementation

[0118] The embodiments of this application are described below with reference to the accompanying drawings.

[0119] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "inner," "outer," "top," "bottom," and "side," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two. In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0120] In addition, in the embodiments of this application, the numerical range mentioned includes the endpoints of the numerical range. For example, the value of X is in the range from A to B, that is, the value of X protected in the embodiments of this application includes endpoint A and endpoint B.

[0121] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the wearable device 1000 provided in some embodiments of this application.

[0122] In some embodiments, the wearable device 1000 may include a main body 100 and a fixing strap 200. The main body 100 and the fixing strap 200 are fixedly connected, wherein the connection between the main body 100 and the fixing strap 200 may be detachable or non-detachable.

[0123] The fixing strap 200 is flexible and designed for wearing on the human body. For example, the fixing strap 200 may include a strap body 200b and an airbag, with the airbag located inside the strap body 200b or fixed to its inner surface. The fixing strap 200 may be made of materials such as nylon for flexibility; alternatively, it may be a metal chain structure. The strap body 200b may be a continuous structure, with the main body 100 fixed to one side; alternatively, the strap body 200b may include two parts, each connected to one end of the main body 100, with the airbag located between the two parts, possibly on one side of the main body 100. This application does not strictly limit the specific materials, structure, or connection structure of the fixing strap 200 to the main body 100.

[0124] The main body 100 can have detection and display functions. For example, the main body 100 can be inflated to detect the user's blood pressure by detecting changes in air pressure inside the airbag; the main body 100 can also display the blood pressure detection results. In this case, the wearable device 1000 can be used as a blood pressure detection device. For example, the wearable device 1000 can be, but is not limited to, an upper arm blood pressure measuring device, a lower limb blood pressure measuring device, a wearable wrist blood pressure measuring device, or other electronic products with blood pressure measurement functions.

[0125] In some other embodiments, the main body 100 may also detect other physiological parameters of the user, such as heart rate, blood oxygen, sleep duration, steps, acceleration, etc. In this case, the wearable device 1000 can be used as a detection device.

[0126] Please refer to the following: Figures 2 to 3B , Figure 2 yes Figure 1 An exploded view of a portion of the structure of the wearable device 1000 shown; Figure 3A yes Figure 1 A schematic diagram of the internal structure of the main body 100 in the wearable device 1000 shown; Figure 3B yes Figure 3A A schematic diagram of the structure of the main body 100 from another perspective.

[0127] In some embodiments, the main body 100 may include a housing 90 and a pump module 10, a controller 20, a drive circuit 30, a pressure sensor 40, an air circuit adapter 50, and a circuit board 60 installed in the housing 90.

[0128] For example, the housing 90 may include a receiving shell 90a and a cover plate 90b. The receiving shell 90a and the cover plate 90b are detachably connected by a snap-fit ​​mechanism to facilitate the disassembly, assembly, and maintenance of the main body 100. Furthermore, the receiving shell 90a and the cover plate 90b are provided with mating threaded holes, and screws are used to strengthen the connection between the receiving shell 90a and the cover plate 90b. The receiving shell 90a has a cavity for accommodating other components of the main body 100. A vent 91 is provided on the side of the receiving shell 90a opposite to the cover plate 90b, which can be used to communicate with an airbag.

[0129] For example, the pump module 10 is used to connect to the airbag to inflate it for the wearable device 1000 to perform detection (e.g., blood pressure detection). Furthermore, after the detection is complete, the pump module 10 can also be used to deflate the airbag. For example, the pump module 10 can be housed in a cavity, and its vent opening 121 can be connected to the vent interface 91.

[0130] For example, the air circuit adapter 50 can be housed in a cavity. The air circuit adapter 50 connects the pump module 10 and the housing 90a so that the channel in the air circuit adapter 50 connects the vent opening 121 and the vent interface 91 of the pump module 10, so that the gas flowing out of the pump module 10 through the vent opening 121 can be transmitted through the air circuit adapter 50 to the vent interface 91 for inflating the airbag 200a.

[0131] For example, the pressure sensor 40 may be fixed to the air circuit adapter 50 and partially embedded in the air circuit adapter 50 to communicate with a channel within the air circuit adapter 50. The pressure sensor 40 may be used to measure the air pressure within the channel of the air circuit adapter 50.

[0132] For example, circuit board 60 can be housed in a cavity, and controller 20 and drive circuit 30 are fixed to and electrically connected to circuit board 60. Drive circuit 30 is electrically connected to pump module 10, and controller 20 is used to control drive circuit 30 to drive pump module 10 to inflate airbag 200a in response to control signals. Pressure sensor 40 is electrically connected to circuit board 60, and its detection signal can be transmitted to controller 20 through circuit board 60.

[0133] In some embodiments, the main body 100 may further include a power supply 70 and a charging interface 80. The power supply 70 may be stacked with the circuit board 60 to save installation space and facilitate miniaturization of the main body 100. The power supply 70 may be arranged side-by-side with the pump module 10 to avoid occupying excessive dimensions in the thickness direction of the main body 100, thus contributing to a thinner and lighter main body 100. The power supply 70 is electrically connected to the pump module 10, the controller 20, and the drive circuit 30 to supply power to these components. The charging interface 80 is integrated into the circuit board 60 and electrically connected to the power supply 70 for charging the power supply 70. In some examples, the charging interface 80 is also electrically connected to the controller 20, enabling the controller 20 to transmit signals to external devices via the charging interface 80.

[0134] The housing 90a is provided with a charging opening 92, which is correspondingly provided with the charging interface 80 to expose the charging interface 80 so that the charging interface 80 can be connected to an external power source or external device.

[0135] In some embodiments, the main body 100 may further include a display screen 110, which may be embedded in the cover plate 90b. The display screen 110 may include a display surface, which is disposed away from the housing 90a to display information facing the outside of the main body 100. The display screen 110 is electrically connected to the circuit board 60 to be electrically connected to the controller 20, and the display screen 110 is used to display information, such as time, inflation pressure, power supply, blood pressure measurement results, etc., under the control of the controller 20.

[0136] In some embodiments, the main body 100 may also include control buttons (not shown in the figure), which can be used to control the information displayed on the display screen 110, control the inflation and deflation of the pump module 10, etc. The control buttons are physical buttons electrically connected to the circuit board 60, and / or, the control buttons are touch screen buttons on the display screen 110.

[0137] In this embodiment, the main body 100 may further include a sensor assembly for detecting at least one of heart rate, blood oxygen, sleep duration, steps, and acceleration. It is understood that in some embodiments, the main body 100 may include more or fewer components than those described above, and this embodiment does not impose strict limitations on this.

[0138] Please refer to the following: Figures 3A to 4 , Figure 4 yes Figure 3A The diagram shows a schematic block diagram of the connections of the main body 100 in some embodiments of the wearable device 1000. Dashed lines represent electrical connections, and solid lines represent structural connections.

[0139] In some embodiments, pump module 10 may include multiple piezoelectric pumps, such as Figure 4In this assembly, multiple piezoelectric pumps are included, including a first piezoelectric pump 2 and a second piezoelectric pump 3. The vents of all the piezoelectric pumps are connected to the vent opening 121 of the pump module 10. The gas from the multiple piezoelectric pumps flows out through their respective vents and then converges at the vent opening 121 of the pump module 10, thus inflating the module. The simultaneous output of gas from multiple piezoelectric pumps increases the gas output of the pump module 10, achieving a high flow rate.

[0140] The main body 100 may include multiple drive circuits 30 arranged in parallel, each drive circuit 30 being electrically connected to a piezoelectric pump, for example... Figure 4 In this configuration, multiple drive circuits 30 include a first drive circuit 301 and a second drive circuit 302. The first drive circuit 301 is electrically connected to the first piezoelectric pump 2, and the second drive circuit 302 is electrically connected to the second piezoelectric pump 3. The controller 20 controls the multiple drive circuits 30 through the same control signal. At this time, the multiple drive circuits 30 simultaneously drive the multiple piezoelectric pumps according to the same control signal, thereby improving the consistency of the air output from the multiple piezoelectric pumps and facilitating the stable inflation of the pump module 10. Furthermore, by setting multiple drive circuits 30 in parallel, the power supply current to a single piezoelectric pump can be reduced, facilitating the selection of the piezoelectric pump.

[0141] In this embodiment, multiple piezoelectric pumps are designed, also known as cascaded piezoelectric pumps. By cascading multiple piezoelectric pumps, simultaneous inflation is possible, significantly increasing the flow rate of the pump module 10 and meeting high flow rate requirements, such as those of an upper arm blood pressure monitor. Since piezoelectric pumps are inherently quiet, the pump module 10 provided in this embodiment achieves high flow rate with quiet operation and no vibration.

[0142] It should be noted that, Figure 4 The pump module 10 may include two piezoelectric pumps. The number of drive circuits 30 is shown to be two. The number of piezoelectric pumps included in the pump module 10 and the number of drive circuits 30 included in the main body 100 are not limited. It is only to show that multiple drive circuits 30 are arranged in parallel and receive the same control signal from the controller 20, and that each drive circuit 30 is electrically connected to a piezoelectric pump.

[0143] In some embodiments, the pressure sensor 40 of the main body 100 can detect the pressure in the connection passage between the pump module 10 and the airbag to obtain the airbag pressure. For example, the pressure sensor 40 is used to detect the current pressure value of the pump module 10 inflating the airbag, and transmits the measured current pressure value to the controller 20 to realize inflation feedback.

[0144] Please refer to the following: Figure 5A and Figure 5B , Figure 5A yes Figure 1A schematic diagram of the pump module 10 in some embodiments of the wearable device 1000 shown; Figure 5B yes Figure 5A The diagram shows the structure of the pump module 10 from another perspective.

[0145] In some embodiments, the pump module 10 includes an integrated base 1 and a first piezoelectric pump 2 and a second piezoelectric pump 3 disposed on opposite sides of the integrated base 1. By stacking the first piezoelectric pump 2, the integrated base 1 and the second piezoelectric pump 3 in sequence, the integration of the pump module 10 is improved, thereby achieving a small size and light weight for the pump module 10.

[0146] For example, the number of first piezoelectric pumps 2 is one or more, and the number of second piezoelectric pumps 3 is one or more. Figure 5A and Figure 5B The illustration assumes one first piezoelectric pump 2 and two second piezoelectric pumps 3. It should be noted that the first piezoelectric pump 2 and the second piezoelectric pump 3 can employ the same pump structure, and the assembly method of the first piezoelectric pump 2 with the integrated base 1 can also be the same as the assembly method of the second piezoelectric pump 3 with the integrated base 1. This improves the consistency of the air output from the first piezoelectric pump 2 and the second piezoelectric pump 3, and also enhances the stability of the integration of the first piezoelectric pump 2 with the integrated base 1. The difference between the first piezoelectric pump 2 and the second piezoelectric pump 3 lies in their location on different sides of the integrated base 1. The following description provides a more complete description of the relevant scheme for the first piezoelectric pump 2, while a partial description of the relevant scheme for the second piezoelectric pump 3 is provided. Further details of the relevant scheme for the second piezoelectric pump 3 can be found by referring to the corresponding content of the first piezoelectric pump 2; these details are not repeated in this embodiment.

[0147] Please refer to the following: Figures 6 to 7 , Figure 6 yes Figure 5A An exploded perspective view of the pump module 10 shown. Figure 7 yes Figure 6 The integrated base 1 shown is a structural schematic diagram from another perspective.

[0148] In some embodiments, the integrated base 1 may include a base body 11 and a vent 12. The base body 11 may include a first mounting surface 111 and a second mounting surface 112 disposed opposite to each other. The first mounting surface 111 has a first air inlet 1111, and the second mounting surface 112 has a second air inlet 1121. The vent 12 is fixed to the base body 11 and located on the side of the first mounting surface 111 facing away from the second mounting surface 112. Both the first air inlet 1111 and the second air inlet 1121 communicate with the vent 12. Specifically, the first air inlet 1111 may extend from the first mounting surface 111 into the interior of the base body 11 and communicate with an internal channel of the base body 11 to communicate with the vent 12. The second air inlet 1121 may extend from the second mounting surface 112 into the interior of the base body 11 and communicate with an internal channel of the base body 11 to communicate with the vent 12.

[0149] For example, a first piezoelectric pump 2 is fixed to a first mounting surface 111, and a second piezoelectric pump 3 is fixed to a second mounting surface 112. The first piezoelectric pump 2 is connected to a first air inlet 1111, and the second piezoelectric pump 3 is connected to a second air inlet 1121. The first piezoelectric pump 2 includes an air vent, which is connected to the first air inlet 1111. The second piezoelectric pump 3 includes an air vent 31, which is connected to the second air inlet 1121.

[0150] In this process, the gas generated by the first piezoelectric pump 2 flows to the vent 12 through the first air inlet 1111, and the gas generated by the second piezoelectric pump 3 flows to the vent 12 through the second air inlet 1121. This causes the gas generated by the first piezoelectric pump 2 and the gas generated by the second piezoelectric pump 3 to converge at the vent 12, thereby increasing the overall air output of the pump module 10.

[0151] For example, the vent of the first piezoelectric pump 2 is located at the center of the surface of the first piezoelectric pump 2 facing the base 11 to facilitate the air output of the first piezoelectric pump 2; alternatively, the vent of the first piezoelectric pump 2 is located at a non-center location on the surface of the first piezoelectric pump 2 facing the base 11, so as to be adaptively adjusted according to the installation position of the first piezoelectric pump 2, the internal air passage design of the base 11, etc., to ensure that the normal air output of the first piezoelectric pump 2 is met and transmitted to the vent 12 through the base 11. The vent 31 of the second piezoelectric pump 3 is set with reference to the vent of the first piezoelectric pump 2.

[0152] For example, the number of first piezoelectric pumps 2 is less than or equal to the number of second piezoelectric pumps 3, so that the base 11 has sufficient and flexible arrangement space on the side of its first mounting surface 111 facing away from the second mounting surface 112 to arrange the vent nozzles 12, thereby improving the space utilization of the pump module 10, improving the integration of the pump module 10, and thus facilitating the miniaturization of the pump module 10 while achieving a large flow rate.

[0153] For example, the orthographic projection of all the first piezoelectric pumps 2 onto the second mounting surface 112 falls within the area occupied by all the second piezoelectric pumps 3 on the second mounting surface 112, so that the first piezoelectric pumps 2 do not occupy more area of ​​the base 11 in the XY plane, thus improving the space utilization of the base 11. Here, the area occupied by all the second piezoelectric pumps 3 on the second mounting surface 112 refers to the orthographic projection of the area formed by the sequentially connected outermost edges of all the second piezoelectric pumps 3 onto the second mounting surface 112.

[0154] For example, there is one first piezoelectric pump 2 and two second piezoelectric pumps 3. The orthographic projection of the first piezoelectric pump 2 on the second mounting surface 112 falls on the area occupied by the two second piezoelectric pumps 3 on the second mounting surface 112, so that the first piezoelectric pump 2 does not occupy more area of ​​the seat 11 in the XY plane, thereby improving the space utilization of the seat 11.

[0155] In some embodiments, the first piezoelectric pump 2 has a vent 2132e, which connects to the air inlet of the first piezoelectric pump 2 to connect to the first air outlet 1111. The integrated base 1 may also include a limiting platform 116, which is fixed to the base body 11 and protrudes relative to the first mounting surface 111. The limiting platform 116 is disposed on the periphery of the first piezoelectric pump 2, and the limiting platform 116 has a clearance groove 1161, which is provided to avoid the vent 2132e.

[0156] For example, there can be two limiting platforms 116, and the two limiting platforms 116 are arranged on opposite sides of the first piezoelectric pump 2 to achieve limiting installation of the first piezoelectric pump 2. Among them, one limiting platform 116 is provided with a relief groove 1161, and the vent 2132e of the first piezoelectric pump 2 is located in the relief groove 1161 to achieve relief of the vent 2132e.

[0157] For example, the number of limiting platforms 116 can also be three or more, with three or more limiting platforms 116 surrounding the first piezoelectric pump 2 to achieve limiting installation of the first piezoelectric pump 2. Among them, one limiting platform 116 is provided with a relief groove 1161, and the vent 2132e of the first piezoelectric pump 2 is located in the relief groove 1161 to achieve relief of the vent 2132e.

[0158] It should be noted that when there are multiple vents 2132e, multiple clearance slots 1161 are set on multiple limit platforms 116, or multiple clearance slots 1161 are set on one limit platform 116, so that one clearance slot 1161 corresponds to one vent 2132e, so as to achieve clearance of the vent 2132e.

[0159] It should be noted that the limiting platform 116 can also be fixed to the base 11 and protrude relative to the second mounting surface 112 to realize the limiting installation of the second piezoelectric pump 3, and a relief groove 1161 for the vent of the second piezoelectric pump 3 is provided accordingly.

[0160] Please refer to the following: Figures 8A to 9B , Figure 8A yes Figure 6 An exploded three-dimensional view of the integrated base 1 shown; Figure 8B yes Figure 8A A schematic diagram of the integrated base 1 from another perspective; Figure 9A yes Figure 6 A schematic diagram of the integrated base 1 cut along line AA; Figure 9B yes Figure 6 The diagram shows a cross-section of the integrated base 1 along line BB. The coordinate system in the diagram is illustrated with the width direction of the integrated base 1 as the X-direction, the length direction as the Y-direction, and the thickness direction as the Z-direction.

[0161] In some embodiments, the base 11 has a first air passage 113 and a second air passage 114 located between a first mounting surface 111 and a second mounting surface 112. The first air passage 113 connects a first air inlet 1111 and a vent 12, and the second air passage 114 connects a second air inlet 1121 and a vent 12.

[0162] For example, there can be multiple first piezoelectric pumps, with the number of first air inlets 1111 and first air passages 113 being the same as the number of first piezoelectric pumps, and one first piezoelectric pump corresponding to one first air inlet 1111 and one first air passage 113. Alternatively, there can be multiple second piezoelectric pumps, with the number of second air inlets 1121 and second air passages 114 being the same as the number of second piezoelectric pumps, and one second piezoelectric pump corresponding to one second air inlet 1121 and one second air passage 114. In this embodiment, by setting multiple first piezoelectric pumps and / or multiple second piezoelectric pumps, the air output of the pump module can be increased, and the flow rate of the pump module can be increased.

[0163] In some embodiments, the seat 11 may include a first seat 11a and a second seat 11b that are sealed together. The first seat 11a has a first mounting surface 111 and a first strip groove 113a, a second strip groove 114a, and a first manifold 115a facing the second seat 11b. One end of the first strip groove 113a is connected to a first air inlet 1111, and the other end of the first strip groove 113a is connected to the first manifold 115a. One end of the second strip groove 114a is connected to the first manifold 115a. The second seat 11b has a second mounting surface 112 and a third strip groove 113b, a fourth strip groove 114b, and a second manifold 115b facing the first seat 11a. One end of the third strip groove 113b is connected to the second manifold 115b. One end of the fourth strip groove 114b is connected to the second air inlet 1121, and the other end of the fourth strip groove 114b is connected to the second manifold 115b. The first strip groove 113a and the third strip groove 113b cooperate to form the first air passage 113. The second strip groove 114a and the fourth strip groove 114b cooperate to form the second air passage 114. The first manifold 115a and the second manifold 115b cooperate to form the manifold channel 115, and the manifold channel 115 is connected to the vent 12.

[0164] For example, the first seat 11a and the second seat 11b are connected along the Z direction so that the opening of the first strip groove 113a facing the second seat 11b and the opening of the third strip groove 113b facing the first seat 11a are aligned and fitted to form a first air passage 113, and the opening of the second strip groove 114a facing the second seat 11b and the opening of the fourth strip groove 114b facing the first seat 11a are aligned and fitted to form a second air passage 114. In this embodiment, by forming strip grooves on the first seat 11a and the second seat 11b respectively and then combining them into an air passage, it is beneficial to the processing of the first seat 11a, the second seat 11b and the air passage, thereby improving the yield of the integrated seat 1.

[0165] Understandably, the length, shape, and extension path of the first airway 113 are consistent with the first strip groove 113a and the third strip groove 113b, and the length, shape, and extension path of the second airway 114 are consistent with the second strip groove 114a and the fourth strip groove 114b. Furthermore, the relative positional relationship between the first airway 113 and the second airway 114 is consistent with the relative positional relationship between the first strip groove 113a and the second strip groove 114a, and also with the relative positional relationship between the third strip groove 113b and the fourth strip groove 114b.

[0166] The length, shape, and extension path of the first airway 113 can be described with reference to the attached drawings of the first strip groove 113a and the third strip groove 113b. The length, shape, and extension path of the second airway 114 can be described with reference to the attached drawings of the second strip groove 114a and the fourth strip groove 114b. The relative positional relationship between the first airway 113 and the second airway 114 can be described with reference to the relative positional relationship between the first strip groove 113a and the second strip groove 114a, or with reference to the relative positional relationship between the third strip groove 113b and the fourth strip groove 114b.

[0167] One end of the first air passage 113 is connected to the confluence channel 115, and one end of the second air passage 114 is also connected to the confluence channel 115. This allows the gas entering the first air passage 113 through the first air outlet 1111 to converge with the gas entering the second air passage 114 through the second air outlet 1121 at the confluence channel 115 before flowing out through the vent 12. By converging the gas from the first air passage 113 and the gas from the second air passage 114 before flowing out, the air output of the pump module can be increased.

[0168] In this embodiment, the first air inlet 1111 and the second air inlet 1121 are staggered, and the portion of the first air passage 113 between the first air inlet 1111 and the confluence channel 115 is separated from the portion of the second air passage 114 between the second air inlet 1121 and the confluence channel 115. By separating the portions of the first air passage 113 and the second air passage 114 outside the confluence channel 115, the gas in the first air passage 113 and the gas in the second air passage 114 can be prevented from converging before entering the confluence channel 115, thereby reducing the flow resistance of the gas before entering the confluence channel 115 and preventing eddies and turbulence from forming between the gas in the first air passage 113 and the gas in the second air passage 114 before entering the confluence channel 115, which is beneficial to the stable gas output of the pump module.

[0169] In some embodiments, the ratio of the length of the first air passage 113 to the length of the second air passage 114 is in the range of 0.9 to 1.1. For example, the lengths of the first air passage 113 and the second air passage 114 can be equal. In this embodiment, by setting the length of the gas transmission path in the first air passage 113 to be equal to or have a small difference in length with the length of the gas transmission path in the second air passage 114, the flow resistance encountered by the gas in the first air passage 113 is less than the flow resistance encountered by the gas in the second air passage 114. Consequently, the gas pressure transmitted from the first air passage 113 to the manifold 115 is less than the gas pressure transmitted from the second air passage 114 to the manifold 115, thus improving the gas output stability of the pump module.

[0170] For example, the ratio of the length of the first airway 113 to the length of the second airway 114 can be, but is not limited to, 0.9, 0.95, 1.0, 1.05, 1.1, or other values ​​between 0.9 and 1.1. The length of the first airway 113 can be represented by the length of the centerline of the first stripe 113a, and the length of the second airway 114 can be represented by the length of the centerline of the second stripe 114a.

[0171] In some embodiments, the first air passage 113 may include a first portion and a second portion that are connected. The cross-sectional area of ​​the first portion remains constant, while the cross-sectional area of ​​the second portion differs from that of the first portion. The ratio of the length of the second portion to the length of the first air passage 113 is less than or equal to 0.1. In this embodiment, by setting the ratio of the length of the second portion to the length of the first portion, the variable cross-sectional portion of the first air passage 113 is reduced, thereby avoiding excessive flow resistance during gas transmission within the first air passage 113, reducing pressure loss, and improving the stability of the pump module's output gas.

[0172] For example, the first part can be a continuous whole or multiple parts spaced apart. The second part can also be a continuous whole or multiple parts spaced apart, with the cross-sectional area being the same or different at various points within the second part. The overall or partial arrangement of the first and second parts can be flexibly configured.

[0173] The ratio of the length of the second part to the length of the first airway 113 can be, but is not limited to, 0.1, 0.08, 0.06, 0.04, 0.02, 0, or other values ​​less than 0.1.

[0174] Similarly, the second airway 114 may include a connected third part and a fourth part. The cross-sectional area of ​​the third part remains unchanged, while the cross-sectional area of ​​the fourth part is different from that of the third part. The ratio of the length of the fourth part to the length of the second airway 114 is less than or equal to 0.1.

[0175] For example, the ratio of the cross-sectional area of ​​the third part to the cross-sectional area of ​​the first part is in the range of 0.9 to 1.1. By setting the ratio of the cross-sectional area of ​​the third part to the cross-sectional area of ​​the first part, the difference between the flow resistance of the first air passage 113 and the flow resistance of the second air passage 114 can be reduced, so that the gas pressure when the gas is transmitted from the first air outlet 1111 through the first air passage 113 to the confluence channel 115 is highly consistent with the gas pressure when the gas is transmitted from the second air outlet 1121 through the second air passage 114 to the confluence channel 115, which is beneficial to the stability of the gas output of the pump module.

[0176] The ratio of the cross-sectional area of ​​the third part to the cross-sectional area of ​​the first part can be, but is not limited to, 0.9, 0.95, 1.0, 1.05, 1.1, or other values ​​between 0.9 and 1.1.

[0177] In some embodiments, the absolute value of the difference between the length of the first air passage 113 and the length of the second air passage 114 is less than or equal to 2 mm. In this embodiment, by setting the difference between the length of the first air passage 113 and the length of the second air passage 114, the deviation between the length of the gas transmission path in the first air passage 113 and the length of the gas transmission path in the second air passage 114 can be small. This results in a smaller difference between the flow resistance encountered by the gas in the first air passage 113 and the flow resistance encountered by the gas in the second air passage 114, and consequently, a smaller difference between the gas pressure transmitted from the first air passage 113 to the manifold 115 and the gas pressure transmitted from the second air passage 114 to the manifold 115, thereby improving the gas output stability of the pump module.

[0178] For example, the absolute value of the difference between the length of the first airway 113 and the length of the second airway 114 is 2 mm, or 1.5 mm, or 1 mm, or 0.5 mm, or 0 mm, or other value less than 2 mm.

[0179] In other embodiments, the height of the first air passage 113 in the thickness direction of the seat 11 (see [reference]). Figure 9A H1 in the figure is in the range of 0.2 mm to 0.5 mm, and the width of the first airway 113 (see [reference]). Figure 9A The W1 in the figure is in the range of 1mm to 2mm. In this embodiment, by setting the height and width of the first air passage 113, it is possible to ensure the cross-sectional area of ​​the first air passage 113 to prevent excessive flow resistance while reducing the space occupied by the first air passage 113 in the thickness direction of the base 11. This is beneficial for the thinner and lighter design of the base 11, thereby reducing the thickness of the pump module. The thickness direction of the base 11 is the Z direction, and the width direction of the first air passage 113 is perpendicular to the extension direction of the first air passage 113 and perpendicular to the thickness direction of the base 11.

[0180] For example, the height of the first air passage 113 in the thickness direction of the seat body 11 is 0.2 mm, or 0.3 mm, or 0.4 mm, or 0.5 mm, or other values ​​between 0.2 mm and 0.5 mm, and the width of the first air passage 113 is 1 mm, or 1.2 mm, or 1.4 mm, or 1.6 mm, or 1.8 mm, or 2.0 mm, or other values ​​between 1 mm and 2 mm.

[0181] Similarly, the height of the second air passage 114 in the thickness direction of the seat body 11 is in the range of 0.2mm to 0.5mm, and the width of the second air passage 114 is in the range of 1mm to 2mm.

[0182] In some other embodiments, the absolute value of the difference between the length of the first airway 113 and the length of the second airway 114 is less than or equal to 2 mm, and the height of the first airway 113 in the thickness direction of the seat 11 is in the range of 0.2 mm to 0.5 mm, and the width of the first airway 113 is in the range of 1 mm to 2 mm. The height of the second airway 114 in the thickness direction of the seat 11 is in the range of 0.2 mm to 0.5 mm, and the width of the second airway 114 is in the range of 1 mm to 2 mm.

[0183] In this embodiment, by setting the difference between the length of the first air passage 113 and the length of the second air passage 114, the deviation between the length of the gas transmission path in the first air passage 113 and the length of the gas transmission path in the second air passage 114 can be small. This results in a smaller difference between the flow resistance encountered by the gas in the first air passage 113 and the flow resistance encountered by the gas in the second air passage 114. Consequently, the gas pressure transmitted from the first air passage 113 to the manifold 115 is smaller than the gas pressure transmitted from the second air passage 114 to the manifold 115, thus improving the gas output stability of the pump module.

[0184] In this embodiment, by setting the height and width of the first air passage 113, it is possible to ensure the cross-sectional area of ​​the first air passage 113 and the second air passage 114 to prevent excessive flow resistance, while reducing the space occupied by the first air passage 113 and the second air passage 114 in the thickness direction of the base body 11. This is beneficial for the thinner and lighter design of the base body 11, thereby helping to reduce the thickness of the pump module.

[0185] In the embodiments of this application, the extension path of the first airway 113 may include the following implementation methods. It can be understood that the extension path of the second airway 114 may adopt any of the following implementation methods, with the first airway 113 being used as an example for illustration.

[0186] In some embodiments, the extension path of the first air passage 113 may include at least two straight segments and at least one curved segment, with adjacent straight segments smoothly connected by the curved segment. In this embodiment, the smooth connection between adjacent straight segments by the curved segment ensures that there are no right angles between them, reducing the flow resistance of gas as it is transported from one straight segment to another within the first air passage 113. This reduces the flow loss of gas due to changes in its transport direction within the first air passage 113, increases the gas pressure when the gas is transported from the first air passage 113 to the confluence channel 115, and is beneficial to the stable gas output of the pump module.

[0187] For example, when the extension path of the first airway 113 may include two straight segments and one curved segment, one end of the first airway 113 can be connected to the first air inlet 1111 by a straight segment to reduce the pressure loss when gas flows into the first airway 113 from the first air inlet 1111, and the other end of the first airway 113 can be connected to the confluence channel 115 by another straight segment to reduce the pressure loss when gas flows into the confluence channel 115 from the first airway 113.

[0188] When the extension path of the first airway 113 may include at least two curved segments, one end of the first airway 113 and the first air inlet 1111 may be connected by a straight segment or a smooth curved segment to reduce the pressure loss when gas flows from the first air inlet 1111 into the first airway 113. The other end of the first airway 113 and the confluence channel 115 may be connected by a straight segment or a smooth curved segment to reduce the pressure loss when gas flows from the first airway 113 into the confluence channel 115.

[0189] The use of curved segments enhances the flexibility of the first air passage 113's placement, allowing for a more rational design of its distribution within the integrated base 1 based on actual conditions. For instance, the curved segments facilitate a more balanced arrangement of the first and second air passages 113 and 114, ensuring the ratio of their lengths is between 0.9 and 1.1. Furthermore, the curved segments ensure a uniform distribution of the first and second air passages 113 and 114 within the integrated base, thereby improving its structural stability.

[0190] In other embodiments, the extension path of the first air passage 113 may include a straight segment and at least one curved segment. The straight segment may directly connect to the first air outlet 1111 or the converging channel to reduce the pressure loss when gas flows from the first air outlet 1111 into the first air passage 113 or to reduce the pressure loss when gas flows from the first air passage 113 into the converging channel 115. Alternatively, one end of the straight segment may be smoothly connected to the first air outlet 1111 via a curved segment, and the other end of the straight segment may be smoothly connected to the converging channel 115 via a curved segment to reduce the pressure loss when gas flows from the first air outlet 1111 into the first air passage 113 and changes its transmission direction, and to reduce the pressure loss when gas flows from the first air passage 113 into the converging channel 115 and changes its transmission direction.

[0191] In other embodiments, the extension path of the first air passage 113 is a spline curve, so that the first air passage 113 has a smooth curve at all points, and the first air passage 113 is smoothly connected to the first air inlet 1111 and the first air passage 113 is smoothly connected to the confluence channel 115. In this embodiment, the spline curve design can reduce the flow resistance of gas in the first air passage 113, and reduce the pressure loss when gas flows into the first air passage 113 from the first air inlet 1111 and changes its transmission direction, and reduce the pressure loss when gas flows into the confluence channel 115 from the first air passage 113 and changes its transmission direction, which is beneficial to improving the gas output effect of the pump module.

[0192] Among them, spline curves are smooth curves, and arcs are a special type of spline curve. Therefore, the fact that at least part of the extension path of the first airway 113 is arc-shaped also falls within the protection scope of the embodiments of this application.

[0193] In some embodiments, the extension path of the first air passage 113 is a straight segment, such that one end of the first air passage 113 is directly connected to the first air inlet 1111, and the other end of the first air passage 113 is directly connected to the confluence channel 115. The straight segment design of the first air passage 113 reduces the change in transmission direction of gas during its transmission from the first air inlet 1111 to the first air passage 113, and then from the first air passage 113 to the confluence channel 115, thereby reducing flow resistance during gas transmission and improving the gas output efficiency of the pump module.

[0194] Indicative, to Figure 8B The extension paths of the first strip groove 113a and the second strip groove 114a are schematically illustrated. The first seat 11a has one first strip groove 113a and two second strip grooves 114a.

[0195] Specifically, regarding the extension direction of the first strip groove 113a, the extension path of the first strip groove 113a extends in a curve from the first air inlet 1111 towards the -X direction and towards the Y direction, then extends in a straight line along the Y direction, then extends in a curve towards the Y direction and towards the X direction, then extends in a straight line along the X direction, then extends in a curve towards the X direction and towards the -Y direction, then extends in a straight line along the -Y direction, then extends in a curve towards the -Y direction and towards the X direction and connects to the first confluence groove 115a.

[0196] Specifically, for the second strip groove 114a corresponding to the second air inlet 1121 located on the Y-direction side of the first air inlet 1111, the extension path of the second strip groove 114a extends in a straight line along the Y direction from the portion of the second air inlet 1121 corresponding to the first seat 11a, then extends in a curve towards the Y direction and towards the -X direction, then extends in a straight line along the -X direction, then extends in a curve towards the -X direction and towards the -Y direction, then extends in a straight line along the -Y direction, then extends in a curve towards the -Y direction and towards the X direction, then extends in a straight line along the X direction, then extends in a curve towards the X direction and towards the Y direction and connects to the first confluence groove 115a.

[0197] Specifically, for the second strip groove 114a corresponding to the second air inlet 1121 located on the Y-direction side of the first air inlet 1111, the extension path of the second strip groove 114a extends in a curve from the part of the second air inlet 1121 corresponding to the first seat 11a in the Y direction and towards the X direction, then extends in a straight line along the X direction, then extends in a curve in the X direction and towards the -Y direction, then extends in a straight line along the -Y direction, then extends in a curve in the -Y direction and towards the -X direction and connects to the first confluence groove 115a.

[0198] In some embodiments, the second seat 11b also has an adhesive dispensing groove 117, which is separated from the third strip groove 113b and the fourth strip groove 114b. The adhesive dispensing groove 117 is used to apply adhesive to bond the second seat 11b to the first seat 11a, thereby improving the sealing performance after the first seat 11a and the second seat 11b are connected, and thus improving the sealing performance of the integrated seat.

[0199] For example, the dispensing groove 117 is arranged around the third strip groove 113b and the fourth strip groove 114b, which is beneficial for sealing the first air passage 113 and the second air passage 114. Specifically, the dispensing groove 117 is arranged around the entire outer periphery of the third strip groove 113b and the fourth strip groove 114b; alternatively, the dispensing groove 117 is located in the interval region between the third strip groove 113b and the fourth strip groove 114b; or, a portion of the dispensing groove 117 is arranged around the entire outer periphery of the third strip groove 113b and the fourth strip groove 114b, while another portion is located in the interval region between the third strip groove 113b and the fourth strip groove 114b.

[0200] In some embodiments, the second seat 11b further includes a column 118, one end of which is fixedly connected to the bottom wall of the dispensing groove 117, and the other end of which is attached to the surface of the first seat 11a facing the second seat 11b. The column 118 is located in the area enclosed by the first strip groove 113a, the area enclosed by the second strip groove 114a, and the interval area between the first strip groove 113a and the second strip groove 114a. In this embodiment, the design of the column 118 avoids an excessively large area of ​​adhesive application in the dispensing groove 117, which facilitates the uniform application of adhesive and improves the bonding and sealing effect between the first seat 11a and the second seat 11b.

[0201] In other embodiments, the first seat 11a has a dispensing groove 117, which is separated from the first strip groove 113a and the second strip groove 114a. The dispensing groove 117 is used to apply adhesive to bond the first seat 11a and the second seat 11b together, thereby improving the sealing performance after the first seat 11a and the second seat 11b are connected, and thus improving the sealing performance of the integrated seat. In addition, the second seat 11b may also be provided with a pillar 118, and the arrangement is the same as the embodiment in which the first seat 11a is provided with a dispensing groove 117 and a pillar 118.

[0202] In other embodiments, the base 11 is a one-piece structure. By making the base 11 a one-piece structure, the airtightness and structural stability of the base 11 can be improved. For example, the base 11 can be manufactured by injection molding or other methods.

[0203] Please refer to the following: Figures 10A to 10C , Figure 10A yes Figure 5A The diagram shows a partial structural schematic of the pump module 10 cut along the CC line in some embodiments. Figure 10B yes Figure 10A The diagram shows the structure of the pump module 10 equipped with the sealing ring 4. Figure 10C yes Figure 10A The diagram shows the structure of the pump module 10 with the vibration isolation layer 5. Figures 10A to 10C The diagram illustrates the connection between the first piezoelectric pump 2 and the first base 11a. It can be understood that the connection between the second piezoelectric pump and the second base can be any embodiment of the connection between the first piezoelectric pump 2 and the first base 11a.

[0204] In some embodiments, please refer to Figure 10AThe vent 2141 of the first piezoelectric pump 2 is directly opposite the first air outlet 1111 of the first base 11a, and the surface of the first piezoelectric pump 2 facing the first base 11a is fixed to the first mounting surface 111. The vent 2141 of the first piezoelectric pump 2 may include multiple spaced through holes, which form a hole group, thus achieving a uniform airflow effect and facilitating uniform air output from the first piezoelectric pump 2. The orthogonal projection of the vent 2141 onto the first mounting surface 111 can fall within the first air outlet 1111, reducing the flow resistance of the gas flowing out of the first piezoelectric pump 2 through the vent 2141 and facilitating better gas flow into the first air outlet 1111. In some other embodiments, the vent 2141 may also be formed by a single through hole.

[0205] In some embodiments, please refer to Figure 10B The pump module 10 may further include a sealing ring 4, which is disposed between the first mounting surface 111 and the first piezoelectric pump 2, and seals the connection between the seat 11 and the first piezoelectric pump 2. The sealing ring 4 is arranged to seal around the first air inlet 1111. In this embodiment, the sealing ring 4 seals the first air inlet 1111 and the vent 2141, which can prevent gas from overflowing when the first piezoelectric pump 2 discharges gas to the first air inlet 1111, improve the airtightness at the junction of the vent 2141 and the first air inlet 1111, and improve the effect of the first piezoelectric pump 2 discharging gas to the first seat 11a.

[0206] For example, a sealant 6 may be provided on the outer periphery of the sealing ring 4. The sealant 6 fixes the first mounting surface 111 to the surface of the first piezoelectric pump 2 facing the first seat 11a, thereby cooperating with the sealing ring 4 to seal the first piezoelectric pump 2 and the first seat 11a, improving the sealing effect between the first piezoelectric pump 2 and the first seat 11a. In other embodiments, the sealant 6 may also be partially located on the inner side of the sealing ring 4, between the sealing ring 4 and the first mounting surface 111, or between the sealing ring 4 and the first piezoelectric pump 2.

[0207] In some embodiments, please refer to Figure 10CThe pump module 10 may further include a vibration isolation layer 5, which abuts against the first mounting surface 111 and the first piezoelectric pump 2. The vibration isolation layer 5 is made of a flexible or elastic material. In this embodiment, by providing the vibration isolation layer 5, a buffer area is provided between the first piezoelectric pump 2 and the first base 11a to reduce or even eliminate the vibration transmitted to the first base 11a when the first piezoelectric pump 2 is working. Similarly, providing a vibration isolation layer 5 between the second piezoelectric pump and the second base can also reduce or even eliminate the vibration transmitted to the second base when the second piezoelectric pump is working, thereby reducing or even eliminating the interference of mutual vibration between the first piezoelectric pump 2 and the second piezoelectric pump during operation, thus improving the consistency of operation of the first piezoelectric pump 2 and the second piezoelectric pump, and improving the air output stability of the pump module 10. In addition, in this embodiment, by providing the vibration isolation layer 5, the noise of the first piezoelectric pump 2 during operation can also be reduced, which is beneficial to further quieting the pump module 10 and improving the user experience.

[0208] For example, the vibration isolation layer 5 can be a single, continuous layer or multiple spaced sections. The vibration isolation layer 5 can be, but is not limited to, foam, gel-like materials, etc. For instance, the thickness of the vibration isolation layer 5 is less than 1 mm; for example, the thickness of the vibration isolation layer 5 can be, but is not limited to, 0.9 mm, 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm, or other values ​​less than 1 mm.

[0209] In some embodiments, the sealing ring 4 may be disposed between the first mounting surface 111 and the first piezoelectric pump 2, and the sealing ring 4 may be disposed around the first air outlet 1111 to improve the airtightness at the junction of the vent 2141 and the first air outlet 1111. A sealant 6 is provided on the outer periphery of the sealing ring 4, and the sealant 6 fixes the first mounting surface 111 and the surface of the first piezoelectric pump 2 facing the first base 11a to improve the sealing effect between the first piezoelectric pump 2 and the first base 11a. A vibration isolation layer 5 abuts between the first mounting surface 111 and the first piezoelectric pump 2, and the vibration isolation layer 5 is disposed on the outer periphery of the sealant 6 to reduce the thickness of the pump module 10, which is beneficial for the lightweight design of the pump module 10. Specifically, the vibration isolation layer 5 abuts between the first mounting surface 111 and the first piezoelectric pump 2 means that one side of the vibration isolation layer 5 is attached to the first mounting surface 111, and the other side of the vibration isolation layer 5 is attached to the surface of the first piezoelectric pump 2 facing the first base 11a.

[0210] In other embodiments, the sealing ring 4 may be disposed between the vibration isolation layer 5 and the first piezoelectric pump 2, and the sealing ring 4 may be arranged around the first air outlet 1111 to improve the airtightness at the junction of the air inlet 2141 and the first air outlet 1111. A sealant 6 is provided on the outer periphery of the sealing ring 4, and the sealant 6 fixes the vibration isolation layer 5 and the surface of the first piezoelectric pump 2 facing the first base 11a to improve the sealing effect between the first piezoelectric pump 2 and the first base 11a.

[0211] Please refer to the following: Figure 11A and Figure 11B , Figure 11A yes Figure 5A The diagram shows a partial structural schematic of the pump module 10 cut along the CC line in some other embodiments. Figure 11B yes Figure 11A The diagram shows the structure of the pump module 10 with the vibration isolation layer 5. Figures 11A to 11B The diagram illustrates the connection between the first piezoelectric pump 2 and the first base 11a. It can be understood that the connection between the second piezoelectric pump and the second base can be any embodiment of the connection between the first piezoelectric pump 2 and the first base 11a. Figure 11A , Figure 11B The pump module 10 of the illustrated embodiment may include Figure 11A , Figure 11B The pump module 10 of the illustrated embodiment has most of the technical features. The following mainly describes the differences between the two, and the most common contents of the two will not be repeated.

[0212] In some embodiments, the base 11 is provided with a mounting groove 1112. The opening of the mounting groove 1112 is located on the first mounting surface 111, and the mounting groove 1112 is arranged around the first air inlet 1111. The pump module 10 may also include a sealing ring 4, which is disposed in the mounting groove 1112 and surrounds the first air inlet 1111. The sealing ring 4 provides a sealing connection between the first base 11a and the first piezoelectric pump 2.

[0213] In this embodiment, the mounting groove 1112 can accommodate the sealing ring 4 to reduce the overall thickness after the first seat 11a and the first piezoelectric pump 2 are fixedly connected, thereby reducing the overall thickness of the pump module 10 and facilitating the thinner and lighter design of the pump module 10. The sealing ring 4 seals the first air outlet 1111 and the vent 2141, preventing gas leakage when the first piezoelectric pump 2 discharges gas to the first air outlet 1111, improving the airtightness at the junction of the vent 2141 and the first air outlet 1111, and improving the effect of the first piezoelectric pump 2 discharging gas to the first seat 11a.

[0214] For example, a sealant 6 is provided on the outer periphery of the sealing ring 4. The sealant 6 is located in the mounting groove 1112. The sealant 6 is fixedly connected to the bottom of the mounting groove 1112 and the surface of the first piezoelectric pump 2 facing the first seat 11a, so as to cooperate with the sealing ring 4 to seal the connection between the first piezoelectric pump 2 and the first seat 11a, thereby improving the sealing effect between the first piezoelectric pump 2 and the first seat 11a.

[0215] In some embodiments, the pump module 10 may further include a vibration isolation layer 5, which is disposed within the mounting groove 1112 and abuts against the bottom of the mounting groove 1112 and the first piezoelectric pump 2. The vibration isolation layer 5 is made of a flexible or elastic material. By providing the vibration isolation layer 5, a buffer area is provided between the first piezoelectric pump 2 and the first base 11a, which can reduce the noise of the first piezoelectric pump 2 during operation, further reducing the noise of the pump module 10 and improving the user experience.

[0216] For example, the vibration isolation layer 5 can be a single, integral layer or multiple spaced sections. A sealing ring 4 is disposed within the mounting groove 1112, between the bottom of the mounting groove 1112 and the first piezoelectric pump 2, and surrounds the first air inlet 1111 to improve the airtightness at the junction of the vent 2141 and the first air inlet 1111. A sealant 6 is provided on the outer periphery of the sealing ring 4, which fixes the bottom of the mounting groove 1112 to the surface of the first piezoelectric pump 2 facing the first base 11a, thereby improving the sealing effect between the first piezoelectric pump 2 and the first base 11a. The vibration isolation layer 5 abuts against the bottom of the mounting groove 1112 and the first piezoelectric pump 2, and is disposed on the outer periphery of the sealant 6, reducing the thickness of the pump module 10 and facilitating a thinner and lighter design for the pump module 10. The phrase "the vibration isolation layer 5 abuts against the bottom of the mounting groove 1112 and the first piezoelectric pump 2" means that one side of the vibration isolation layer 5 is attached to the bottom of the mounting groove 1112, and the other side of the vibration isolation layer 5 is attached to the surface of the first piezoelectric pump 2 facing the first seat 11a.

[0217] Please refer to the following: Figure 4 , Figure 12A and Figure 12B , Figure 12A yes Figure 4 A schematic diagram showing the pressurization of the gas inside the airbag 200a when the pump module 10 is working. Figure 12B yes Figure 4 The diagram shows the slope change of the gas pressure rise inside the airbag 200a when the pump module 10 is working.

[0218] In some embodiments, the pressure sensor 40 is used to detect the current air pressure value inside the airbag 200a when the pump module 10 is working and transmits it to the controller 20. The controller 20 is used to adjust the duty cycle of the control signal according to the current air pressure value. The pump module 10 can inflate and deflate the airbag 200a.

[0219] In this embodiment, adjusting the duty cycle of the control signal by the controller 20 enables the current air pressure value to change linearly with time, and the linear slope of the current air pressure value changing with time is stable, which is beneficial to the accuracy of blood pressure detection. The control signal can be a pulse width modulation (PWM) signal.

[0220] For example, the absolute value of the difference between the oscillation frequency of the first piezoelectric pump 2 and the frequency of the control signal is less than or equal to 0.3 kHz, and the absolute value of the difference between the oscillation frequency of the second piezoelectric pump 3 and the frequency of the control signal is less than or equal to 0.3 kHz. In other words, the absolute value of the difference between the oscillation frequency of the first piezoelectric pump 2 and the oscillation frequency of the second piezoelectric pump 3 is less than or equal to 0.6 kHz, so that the operating frequency of the first piezoelectric pump 2 and the operating frequency of the second piezoelectric pump 3 tend to be consistent, which is beneficial to improving the consistency of the gas output of the first piezoelectric pump 2 and the second piezoelectric pump 3, thereby improving the gas output stability of the pump module 10.

[0221] For example, the absolute value of the difference between the oscillation frequency of the first piezoelectric pump 2 and the frequency of the control signal is less than or equal to 0.2 kHz, and the absolute value of the difference between the oscillation frequency of the second piezoelectric pump 3 and the frequency of the control signal is less than or equal to 0.2 kHz. In other words, the absolute value of the difference between the oscillation frequency of the first piezoelectric pump 2 and the oscillation frequency of the second piezoelectric pump 3 is less than or equal to 0.4 kHz, so that the operating frequency of the first piezoelectric pump 2 and the operating frequency of the second piezoelectric pump 3 tend to be consistent, which is beneficial to improving the gas output consistency of all the first piezoelectric pumps 2, thereby improving the gas output stability of the pump module 10.

[0222] In this embodiment, the oscillation frequency of the first piezoelectric pump 2 is its optimal operating frequency, and the oscillation frequency of the second piezoelectric pump 3 is its optimal operating frequency. Setting the frequency of the control signal to be close to the optimal operating frequencies of the first and second piezoelectric pumps 2 and 3 can improve the consistency of the gas output between them, thereby facilitating a linear pressure increase of the gas output from the pump module 10 to the required pressure value.

[0223] For example, the oscillation frequencies of the first piezoelectric pump 2 and the second piezoelectric pump 3 are in the range of 23.8kHz ± 0.2kHz to 0.3kHz. For example, the oscillation frequencies of the first piezoelectric pump 2 and the second piezoelectric pump 3 are both 23.8kHz, or the oscillation frequency of the first piezoelectric pump 2 is 24kHz and the oscillation frequency of the second piezoelectric pump 3 is 24.1kHz, or the oscillation frequency of the first piezoelectric pump 2 is 23.6kHz and the oscillation frequency of the second piezoelectric pump 3 is 23.5kHz, etc.

[0224] In other embodiments, the controller 20 is used to adjust the occupancy ratio of the control signal according to the current air pressure value, so that the current air pressure value changes according to a preset pattern over time. For example, the preset pattern may be a quadratic function, a power function, a logarithmic function, etc., as long as the preset pattern is beneficial to the detection of physiological parameters.

[0225] Please refer to the following: Figure 13 and Figure 14 , Figure 13 yes Figure 2A schematic diagram of the gas path adapter 50 in some embodiments of the main body 100 shown; Figure 14 yes Figure 1 A partial cross-sectional view of the main body 100 of the wearable device 1000 at the air circuit adapter 50.

[0226] In some embodiments, the main body 100 may further include a gas path adapter 50 for connecting the vent 12 and the vent interface 91 to transmit the gas generated by the pump module 10 to the airbag for inflation. A pressure sensor 40 is connected to a channel within the gas path adapter 50 so that the pressure sensor 40 can detect the current pressure value of the pump module 10 inflating the airbag.

[0227] For example, the channel within the air path adapter 50 has a first end 501 and a second end 502 spaced apart. The first end 501 is connected to the vent 12. The second end 502 may include a first side 5021 and a second side 5022 arranged opposite to each other. The first side 5021 is connected to the airbag, and the second side 5022 is connected to the pressure sensor 40. In this embodiment, by setting the air path adapter 50, not only can a gas channel be constructed between the pump module 10 and the airbag, making the relative positional relationship between the pump module 10 and the airbag more flexible, but the gas channel also provides a buffer space for the airflow to be used to set the pressure sensor 40, and the pressure sensor 40 is located at the second end 502. By setting the pressure sensor 40 and the vent 12 at the two spaced ends of the air path adapter 50, it is possible to prevent the gas flowing out of the vent 12 from rapidly colliding with the pressure sensor 40, thereby preventing the gas flow rate from the vent 12 from being too fast and damaging the pressure sensor 40.

[0228] The gas path adapter 50 features a curved structure between its first end 501 and second end 502, allowing the channel within the adapter 50 to be smoothly connected between these two ends. This smooth curved connection acts as a buffer in the area between the first end 501 and the second end 502, preventing gas from flowing straight from the vent 12 to the pressure sensor 40. This also prevents the gas from flowing out of the vent 12 at excessively high speeds, which could damage the pressure sensor 40, and avoids the formation of eddies or turbulence due to excessively high gas flow rates. This improves the accuracy of the pressure measurement by the pressure sensor 40.

[0229] Please refer to the following: Figures 14 to 15B , Figure 15A yes Figure 13 An exploded three-dimensional view of the gas path adapter 50 shown. Figure 15B yes Figure 15A A schematic diagram of the air passage adapter 50 from another perspective.

[0230] In some embodiments, the second side 5022 is provided with a detection airway 5023, which has at least one bend in its path and connects the airway adapter 50 with the air pressure sensor 40.

[0231] For example, the gas path adapter 50 may include a first adapter portion 50a, a baffle 50c, and a second adapter portion 50b. The first adapter portion 50a and the second adapter portion 50b are fixedly connected. The surface of the second adapter portion 50b facing the first adapter portion 50a is provided with a detection gas groove 5023a. The detection gas groove 5023a has a first opening 5023b and a second opening 5023c that are disposed opposite to each other. The first opening 5023b is used to receive gas flowing out of the vent 12, and the second opening 5023c is connected to the pressure sensor 40. The path between the first opening 5023b and the second opening 5023c has at least one bend. The baffle 50c is fixed to the second adapter portion 50b and seals the opening of the detection gas groove 5023a facing the first adapter portion 50a to form a detection gas passage 5023.

[0232] In this embodiment, since the detection airway 5023 has at least one bend, the gas flowing in from the first opening 5023b will be slowed down due to the bend, thereby reducing the gas flow rate at the second opening 5023c, which is beneficial to the accuracy of the air pressure sensor 40 in detecting air pressure.

[0233] The periphery of the first adapter 50a may be provided with a lug 503. The lug 503 can fix the air circuit adapter 50 inside the housing 90a, which is beneficial to the structural stability of the air circuit adapter 50 and thus facilitates the detection of air pressure.

[0234] In some embodiments, the air circuit adapter 50 may further include a mounting base 504 and a locking block 505. The mounting base 504 protrudes from the surface of the second adapter portion 50b away from the surface of the first adapter portion 50a, and the mounting base 504 has a through hole to connect to the second opening 5023c. The locking block 505 is fixed to the mounting base 504. The locking block 505 enables a quick and secure connection between the air pressure sensor 40 and the mounting base 504, improving the connection efficiency of the air pressure sensor 40 and the installation stability of the air pressure sensor 40, which is beneficial to improving the accuracy of air pressure detection.

[0235] The structure of the first piezoelectric pump 2 will be described next. The second piezoelectric pump 3 can adopt the structure of the first piezoelectric pump 2 in any of the following embodiments.

[0236] Please refer to the following: Figures 16A to 17 , Figure 16A yes Figure 5A A schematic diagram of the structure of the first piezoelectric pump 2 in some embodiments of the pump module 10 shown; Figure 16B yes Figure 16AA schematic diagram of the first piezoelectric pump 2 from another perspective; Figure 17 yes Figure 16B The diagram shows an exploded three-dimensional view of the first piezoelectric pump 2.

[0237] In some embodiments, the first piezoelectric pump 2 may include a front chamber 21, a piezoelectric vibrator 22, and a rear chamber 23 arranged in sequence. The front chamber 21 has a vent 2141, and the rear chamber 23 has a vent 231. The piezoelectric vibrator 22 vibrates between the front chamber 21 and the rear chamber 23 to generate gas that moves toward the front chamber 21. The gas flows out through the vent 2141 of the front chamber 21.

[0238] In some embodiments, the first piezoelectric pump 2 may further include a housing 24, which is fixedly connected to the front cavity 21, the piezoelectric vibrator 22, and the rear cavity 23. The housing 24 provides a sealing and fixing function, improving the overall structural stability and airtightness of the first piezoelectric pump 2.

[0239] For example, the encapsulation housing 24 is annular and has a first snap-fit ​​groove 241 and a second snap-fit ​​groove 242. The first snap-fit ​​groove 241 is located on the inner sidewall of the encapsulation housing 24 and snaps into the rear cavity 23 to fix the rear cavity 23. The second snap-fit ​​groove 242 is located on one end face of the encapsulation housing 24 and snaps into the piezoelectric vibrator 22. An opening is provided on one side of the encapsulation housing 24 to avoid the electrodes in the piezoelectric vibrator 22. The end face of the encapsulation housing 24 with the second snap-fit ​​groove 242 is attached to the front cavity 21 and fixedly connected to the front cavity 21.

[0240] Please refer to the following: Figures 17 to 18B , Figure 18A yes Figure 17 The diagram shows the structure of the front chamber 21 in some embodiments of the first piezoelectric pump 2. Figure 18B yes Figure 18A The diagram shows a three-dimensional exploded view of the anterior cavity 21.

[0241] In some embodiments, the front cavity 21 may include a base 211, a venting membrane 212, a venting channel layer 213, and a ventilation layer 214. The base 211 is located on the side of the piezoelectric vibrator 22 away from the rear cavity 23, and has an air port 2111 for receiving gas generated by the vibration of the piezoelectric vibrator 22. The venting membrane 212 is located on the side of the base 211 away from the piezoelectric vibrator 22, and has a first through hole 2121. The venting channel layer 213 is located on the side of the venting membrane 212 away from the base 211, and has a second through hole 2131 and a venting channel 2132. The venting channel 2132 is spaced apart from the second through hole 2131, and at least a portion of the venting channel 2132 communicates with the outside of the first piezoelectric pump 2. The ventilation layer 214 is located on the side of the venting channel layer 213 away from the venting membrane 212. The ventilation layer 214 has a vent 2141, and the vent 2141 is connected to the second through hole 2131.

[0242] For example, the ventilation layer 214 is made of a rigid material, such as stainless steel or copper.

[0243] For example, the venting channel layer 213 is made of a hard material, such as stainless steel or copper. The venting channel 2132 can be formed by etching on the venting channel layer 213.

[0244] For example, the venting membrane 212 is made of a soft material, such as a silicone membrane or a rubber membrane. The venting membrane 212 can bend and deform when there is a pressure difference on both sides of the venting membrane 212.

[0245] For example, the base 211 is made of a rigid material, such as stainless steel or copper.

[0246] When the pump module 10 is inflated, the piezoelectric vibrator 22 in the first piezoelectric pump 2 vibrates and drives the gas from the rear chamber 23 toward the front chamber 21. The gas enters the front chamber 21 through the air port 2111. The air pressure of the venting membrane 212 on the base 211 side is higher than the air pressure of the venting membrane 212 on the venting channel layer 213 side. The gas pushes the venting membrane 212 toward the venting channel layer 2132 through the air pressure difference. At this time, the air port 2111, the first through hole 2121, the second through hole 2131 and the air vent 2141 are connected. The gas can flow out to the base 11 through the air vent 2141 and converge to the air nozzle 12 through the first air outlet 1111 and the first air channel 113 of the base 11 to inflate the outside.

[0247] When the pump module 10 deflates, the gas returns to the pump module 10 through the base and enters the second through hole 2131 through the air port 2111. The air pressure on the side of the venting membrane 212 on the venting channel layer 213 is higher than the air pressure on the side of the venting membrane 212 on the base 211. The gas pushes the venting membrane 212 towards the base 211 through the air pressure difference. At this time, the air port 2141, the second through hole 2131, and the venting channel 2132 are connected, and the gas can be released to the outside of the first piezoelectric pump 2 through the venting channel 2132.

[0248] In some embodiments, the venting channel layer 213 has a venting channel 2132, which is located on one side of the second through hole 2131. The second through hole 2131 and the venting channel 2132 are connected or disconnected by the bending deformation of the venting membrane 212. The venting channel 2132 is a hole, a groove, or a combination of a hole and a groove.

[0249] Please refer to the following: Figure 19A and Figure 19B , Figure 19A yes Figure 17 A schematic diagram of the front chamber 21 in the first piezoelectric pump 2 in some other embodiments; Figure 19B yes Figure 19A The diagram shows a three-dimensional exploded view of the anterior cavity 21. Figure 19A , Figure 19B The first piezoelectric pump 2 in the illustrated embodiment may include Figure 18A , Figure 18B Most of the technical features of the front cavity 21 in the illustrated embodiment are described below. The main difference between the two is explained below, and most of the same content will not be repeated.

[0250] In some embodiments, the venting channel layer 213 has at least two venting channels 2132, which are located around the second through hole 2131 and spaced apart from it. The bending deformation of the venting membrane 212 enables communication and isolation between the second through hole 2131 and the at least two venting channels 2132. The presence of at least two venting channels 2132 accelerates venting, improving measurement comfort and safety. Furthermore, the design of at least two venting channels 2132 eliminates the need for additional space in the device, contributing to the miniaturization of the first piezoelectric pump 2.

[0251] Furthermore, since the first piezoelectric pump 2 has at least two venting channels 2132, it can prevent the inability to vent when a single venting channel 2132 fails. In addition, the at least two venting channels 2132 do not require power supply; they only need to work with the flexible venting membrane 212 to open and close the venting function under pressure difference.

[0252] In some embodiments, the front cavity 21 may further include an adhesive layer 215, which is disposed between the venting membrane 212 and the venting channel layer 213 to bond the venting membrane 212 and the venting channel layer 213. The adhesive layer 215 has a clearance hole 2151, which is provided to avoid the first through hole 2121, the second through hole 2131, and the venting channel 2132, so that the portion of the venting membrane 212 not bonded to the venting channel layer 213 can deform under the influence of gas.

[0253] Please refer to the following: Figures 20 to 22A , Figure 20 yes Figure 19A A schematic diagram of the structure of the base 211 in the front cavity 21 in some embodiments is shown; Figure 21 yes Figure 19A A schematic diagram of the structure of the venting membrane 212 in the front cavity 21 in some embodiments is shown; Figure 22A yes Figure 19A The diagram shows a partial structural diagram of the anterior cavity 21 cut along the DD line in some embodiments.

[0254] In some embodiments, the base 211 may include a base body 2112 and a first boss 2113, specifically having a groove 2114 facing the venting membrane 212. The first boss 2113 protrudes from the bottom wall of the groove 2114. The vent 2111 surrounds the first boss 2113 and penetrates the bottom wall of the groove 2114. The venting membrane 212 may include a membrane body 2122 and a second boss 2123. The membrane body 2122 is located on the side of the base 211 away from the piezoelectric vibrator 22, and the membrane body 2122 covers the groove 2114. The second boss 2123 protrudes from the surface of the membrane body 2122 facing the base 211. The second boss 2123 abuts against the first boss 2113. A first through hole 2121 penetrates the membrane body 2122 and the second boss 2123, and the opening of the first through hole 2121 near the base 211 is covered by the first boss 2113.

[0255] The first protrusion 2113 of the base 211 overlaps with the second protrusion 2123 of the venting membrane 212 to isolate the air port 2111 from the vent 2141. The contact area between the base 211 and the venting membrane 212 is small. When the pump module vents, the gas on the side of the venting membrane 212 near the vent 2141 acts on the venting membrane 212, which can make the pressure of the mutual contact between the venting membrane 212 and the base 211 greater. This is more effective in isolating the air port 2111 from the vent 2141 and improves the stability during venting. In addition, since the contact area between the base 211 and the venting membrane 212 is small, when the pump module is inflated, the gas on the side of the venting membrane 212 near the air port 2111 is more likely to drive the part of the venting membrane 212 near the first protrusion 2113 toward the air vent 2141, which is beneficial to guide the air vent 2111 and the air vent 2141 and improve the inflation efficiency.

[0256] Please refer to the following: Figures 22A to 22C , Figure 22B yes Figure 22A The diagram shows the structure of the front cavity 21 when it is inflated. Figure 22C yes Figure 22A The diagram shows the structure of the front chamber 21 when it is deflating. Figure 22B and Figure 22C The dashed line with an arrow indicates the direction of gas flow, with the arrow pointing from high pressure to low pressure.

[0257] In some embodiments, when the pump module is inflated, please refer to [reference needed]. Figure 22B Gas enters the groove 2114 through the air inlet 2111 and pushes the vent membrane 212 towards the second through hole 2131, causing the second boss 2123 to disengage from the first boss 2113, allowing the first through hole 2121 to connect with the groove 2114. The vent membrane 212 and the vent channel layer 213 remain in contact, ensuring that the vent 2141 is isolated from at least two vent channels 2132. Gas flows out sequentially through the air inlet 2111, the groove 2114, the first through hole 2121, the second through hole 2131, and the vent 2141 for inflation.

[0258] When the pump module leaks air, please refer to Figure 22C Gas flows into the second through-hole 2131 through the vent 2141 and causes the venting membrane 212 to bend towards the groove 2114. At this time, the second boss 2123 abuts against the first boss 2113 to separate the vent 2111 from the vent 2141, and the portion of the venting membrane 212 located between the venting channel 2132 and the second through-hole 2131 is no longer in contact with the venting channel layer 213, so that the vent 2141 connects to the venting channel 2132. Gas is then released sequentially through the vent 2141, the second through-hole 2131, and the venting channel 2132 for venting.

[0259] The following describes the venting channel 2132 of the venting channel layer 213. There are at least two venting channels 2132, and the venting channels 2132 are located on the periphery of the second through hole 2131. The included angle between the at least two venting channels 2132 is any angle. The accompanying drawings of this application show that there are two venting channels 2132, and the two venting channels 2132 are at an included angle of 180°.

[0260] Please refer to the following: Figure 19B , Figure 23A and Figure 23B , Figure 23A yes Figure 19A A schematic diagram of the exhaust air passage layer 213 in the front cavity 21 shown in some embodiments; Figure 23B yes Figure 23AThe diagram shows a cross-section of the venting channel layer 213 along line EE.

[0261] In some embodiments, the venting channel layer 213 may include a first surface 2133, a second surface 2134, and a side surface 2135. The first surface 2133 faces the venting layer 214, the second surface 2134 is disposed opposite to the first surface 2133, and the side surface 2135 connects the first surface 2133 and the second surface 2134. The venting channel 2132 may include a first vent hole 2132a and a first vent groove 2132b. The first vent hole 2132a penetrates the first surface 2133 and the second surface 2134. The first vent groove 2132b is recessed in the first surface 2133. One end of the first vent groove 2132b is connected to the first vent hole 2132a, and the other end of the first vent groove 2132b penetrates the side surface 2135 to form a vent 2132e.

[0262] For example, the vent 2132e is located on the side 2135, which reduces the size of the venting channel layer 213 and facilitates the miniaturization design of the first piezoelectric pump 2.

[0263] For example, the first vent groove 2132b is recessed in the first surface 2133. The opening of the first vent groove 2132b facing the ventilation layer 214 can be sealed by the venting channel layer 213 fitting with the ventilation layer 214. The side of the venting channel layer 213 away from the ventilation layer 214 at the first vent groove 2132b does not need to be sealed, which improves the airtightness of the venting channel 2132 and is conducive to the stable venting of the venting channel 2132.

[0264] For example, the cross-sectional area of ​​the first vent hole 2132a is larger than that of the first vent groove 2132b, so that when the first piezoelectric pump 2 vents, the gas can quickly enter the first vent hole 2132a and act as a buffer. When the gas flows from the first vent hole 2132a with a larger cross-sectional area to the first vent groove 2132b with a smaller cross-sectional area, the flow speed of the gas can be increased, thereby increasing the venting speed.

[0265] The flow cross-sectional area is the area of ​​the cross section perpendicular to the gas flow direction. For example, the flow cross-sectional area of ​​the first vent 2132a is the cross-sectional area of ​​the first vent 2132a perpendicular to its centerline, and the flow cross-sectional area of ​​the first vent groove 2132b is the cross-sectional area of ​​the first vent groove 2132b perpendicular to its extension direction.

[0266] Please refer to the following: Figure 19B , Figure 24A and Figure 24B , Figure 24A yes Figure 19AA schematic diagram of the structure of the air venting channel layer 213 in the front cavity 21 in some other embodiments; Figure 24B yes Figure 24A The diagram shows a cross-section of the venting channel layer 213 along line FF. Figure 24A , Figure 24B The venting channel layer 213 of the illustrated embodiment may include Figure 23A , Figure 23B Most of the technical features of the venting channel layer 213 in the illustrated embodiment are described below. The main difference between the two is explained below, and most of the same content will not be repeated.

[0267] In some embodiments, the first vent groove 2132b is recessed on the second surface 2134.

[0268] For example, the first venting groove 2132b is recessed in the second surface 2134, and the first venting groove 2132b has an opening facing the venting membrane 212. When the first piezoelectric pump 2 vents, the venting membrane 212 bends towards the base, allowing the first venting hole 2132a and the first venting groove 2132b to be exposed simultaneously. This allows the vented gas to enter both the first venting hole 2132a and the first venting groove 2132b at the same time, thereby increasing the venting flow rate and improving the venting efficiency.

[0269] Please refer to the following: Figure 19B , Figure 25A and Figure 25B , Figure 25A yes Figure 19A A schematic diagram of the structure of the air venting channel layer 213 in the front cavity 21 in some other embodiments; Figure 25B yes Figure 25A The diagram shows a cross-section of the venting channel layer 213 along line GG. Figure 25A , Figure 25B The venting channel layer 213 of the illustrated embodiment may include Figure 23A , Figure 23B Most of the technical features of the venting channel layer 213 in the illustrated embodiment are described below. The main difference between the two is explained below, and most of the same content will not be repeated.

[0270] In some embodiments, the venting channel layer 213 may include a first surface 2133, a second surface 2134, and a side surface 2135. The first surface 2133 faces the venting layer 214, the second surface 2134 is disposed opposite to the first surface 2133, and the side surface 2135 connects the first surface 2133 and the second surface 2134. The venting channel 2132 may include a first vent hole 2132a and a second vent hole 2132c. Both the first vent hole 2132a and the second vent hole 2132c penetrate the first surface 2133 and the second surface 2134. One end of the second vent hole 2132c is connected to the first vent hole 2132a, and the other end of the second vent hole 2132c penetrates the side surface 2135 to form a vent 2132e.

[0271] For example, both the first vent hole 2132a and the second vent hole 2132c penetrate the first surface 2133 and the second surface 2134, increasing the channel size of the venting channel 2132 and thus improving the venting speed. Furthermore, the second vent hole 2132c has an opening facing the venting membrane 212. When the first piezoelectric pump vents, the venting membrane 212 bends towards the base, allowing both the first vent hole 2132a and the second vent hole 2132c to be exposed simultaneously. This allows the vented gas to enter both the first vent hole 2132a and the second vent hole 2132c at the same time, thereby increasing the venting flow rate and venting efficiency.

[0272] For example, the cross-sectional area of ​​the first vent 2132a is larger than that of the second vent 2132c, so that when the first piezoelectric pump 2 vents, the gas can quickly enter the first vent 2132a and act as a buffer. When the gas flows from the first vent 2132a with a larger cross-sectional area to the second vent 2132c with a smaller cross-sectional area, the flow rate of the gas can be increased, thereby increasing the venting speed.

[0273] The flow cross-sectional area is the area of ​​the cross section perpendicular to the gas flow direction. For example, the flow cross-sectional area of ​​the first vent 2132a is the cross-sectional area of ​​the first vent 2132a perpendicular to its centerline, and the flow cross-sectional area of ​​the second vent 2132c is the cross-sectional area of ​​the second vent 2132c perpendicular to its centerline, and the centerline of the first vent 2132a is perpendicular to the centerline of the second vent 2132c.

[0274] Please refer to the following: Figure 19B , Figure 26A and Figure 26B , Figure 26A yes Figure 19A A schematic diagram of the structure of the air venting channel layer 213 in the front cavity 21 in some other embodiments; Figure 26B yes Figure 26AThe diagram shows a cross-section of the venting channel layer 213 along line HH.

[0275] In some embodiments, the venting channel layer 213 may include a venting body layer 213a and at least two extensions 213b, the extensions 213b being disposed on the outer periphery of the venting body layer 213a. The venting body layer 213a may include a first surface 2133, a second surface 2134, and a side surface 2135. The first surface 2133 faces the venting layer 214, and the first surface 2133 and the second surface 2134 are disposed opposite to each other. The side surface 2135 connects the first surface 2133 and the second surface 2134. The number of extensions 213b is the same as the number of venting channels 2132, and one extension 213b corresponds to one venting channel 2132. The venting channel 2132 may include a first vent hole 2132a, a first vent groove 2132b, and a third vent hole 2132d connected in sequence, the first vent hole 2132a penetrating through the first surface 2133 and the second surface 2134. The first vent groove 2132b is recessed on the first surface 2133. The third vent hole 2132d extends through the extension 213b in the direction from the first surface 2133 to the second surface 2134.

[0276] For example, the extension 213b extends outward relative to the venting body layer 213a to protrude from the first piezoelectric pump 2, and the third vent 2132d penetrates the extension 213b and forms two vents 2132e opposite to each other on two opposite surfaces of the extension 213b, which can reduce the risk of vent blockage and improve venting efficiency.

[0277] For example, the first vent groove 2132b is recessed in the first surface 2133. The opening of the first vent groove 2132b facing the ventilation layer 214 can be sealed by the venting channel layer 213 fitting with the ventilation layer 214. The side of the venting channel layer 213 away from the ventilation layer 214 at the first vent groove 2132b does not need to be sealed, which improves the airtightness of the venting channel 2132 and is conducive to the stable venting of the venting channel 2132.

[0278] In some embodiments, the cross-sectional area of ​​the first vent hole 2132a is larger than that of the first vent groove 2132b, so that when the first piezoelectric pump 2 vents, the gas can quickly enter the first vent hole 2132a and act as a buffer. Furthermore, when the gas flows from the first vent hole 2132a with a larger cross-sectional area to the first vent groove 2132b with a smaller cross-sectional area, the flow rate of the gas can be increased, thereby increasing the venting speed.

[0279] The flow cross-sectional area is the area of ​​the cross section perpendicular to the gas flow direction. For example, the flow cross-sectional area of ​​the first vent 2132a is the cross-sectional area of ​​the first vent 2132a perpendicular to its centerline, and the flow cross-sectional area of ​​the first vent groove 2132b is the cross-sectional area of ​​the first vent groove 2132b perpendicular to its extension direction.

[0280] Please refer to the following: Figure 19B , Figure 27A and Figure 27B , Figure 27A yes Figure 19A A schematic diagram of the structure of the air venting channel layer 213 in the front cavity 21 in some other embodiments; Figure 27B yes Figure 27A The diagram shows a cross-section of the venting channel layer 213 along line II. Figure 27A , Figure 27B The venting channel layer 213 of the illustrated embodiment may include Figure 26A , Figure 26B Most of the technical features of the venting channel layer 213 in the illustrated embodiment are described below. The main difference between the two is explained below, and most of the same content will not be repeated.

[0281] In some embodiments, the first vent groove 2132b is recessed on the second surface 2134.

[0282] For example, the first venting groove 2132b is recessed on the second surface 2134. The first venting groove 2132b has an opening facing the venting membrane 212. When the first piezoelectric pump vents, the venting membrane 212 bends toward the base, which allows the first venting hole 2132a and the first venting groove 2132b to be exposed at the same time. This allows the vented gas to enter the first venting hole 2132a and the first venting groove 2132b at the same time, thereby increasing the venting flow rate and improving the venting efficiency.

[0283] Please refer to the following: Figure 19B , Figure 28A and Figure 28B , Figure 28A yes Figure 19A A schematic diagram of the structure of the air venting channel layer 213 in the front cavity 21 in some other embodiments; Figure 28B yes Figure 28A The diagram shows a cross-section of the venting channel layer 213 along line JJ. Figure 28A , Figure 28B The venting channel layer 213 of the illustrated embodiment may include Figure 26A , Figure 26B Most of the technical features of the venting channel layer 213 in the illustrated embodiment are described below. The main difference between the two is explained below, and most of the same content will not be repeated.

[0284] In some embodiments, the venting channel layer 213 may include a venting body layer 213a and at least two extensions 213b, the extensions 213b being disposed on the outer periphery of the venting body layer 213a. The venting body layer 213a may include a first surface 2133, a second surface 2134, and a side surface 2135. The first surface 2133 faces the venting layer 214, and the first surface 2133 and the second surface 2134 are disposed opposite to each other. The side surface 2135 connects the first surface 2133 and the second surface 2134. The number of extensions 213b is the same as the number of venting channels 2132, and one extension 213b corresponds to one venting channel 2132. The venting channel 2132 may include a first vent, a second vent 2132c, and a third vent 2132d connected in sequence. The first vent 2132a and the second vent 2132c penetrate the first surface 2133 and the second surface 2134. The third vent hole 2132d extends through the extension 213b in the direction from the first surface 2133 to the second surface 2134.

[0285] In some embodiments, both the first vent hole 2132a and the second vent hole 2132c penetrate the first surface 2133 and the second surface 2134, increasing the channel size of the venting channel 2132 and thus improving the venting speed. Furthermore, the second vent hole 2132c has an opening facing the venting membrane 212. When the first piezoelectric pump 2 vents, the venting membrane 212 bends towards the base, allowing both the first vent hole 2132a and the second vent hole 2132c to be exposed simultaneously. This allows the vented gas to enter both the first vent hole 2132a and the second vent hole 2132c at the same time, thereby increasing the venting flow rate and venting efficiency.

[0286] For example, the cross-sectional area of ​​the first vent 2132a is larger than that of the second vent 2132c, so that when the first piezoelectric pump 2 vents, the gas can quickly enter the first vent 2132a and act as a buffer. When the gas flows from the first vent 2132a with a larger cross-sectional area to the second vent 2132c with a smaller cross-sectional area, the flow rate of the gas can be increased, thereby increasing the venting speed.

[0287] The flow cross-sectional area is the area of ​​the cross section perpendicular to the gas flow direction. For example, the flow cross-sectional area of ​​the first vent 2132a is the cross-sectional area of ​​the first vent 2132a perpendicular to its centerline, and the flow cross-sectional area of ​​the second vent 2132c is the cross-sectional area of ​​the second vent 2132c perpendicular to its centerline, and the centerline of the first vent 2132a is perpendicular to the centerline of the second vent 2132c.

[0288] In some other embodiments, the venting channel 2132 may include a first vent hole 2132a, a second vent hole 2132c, and a second vent groove connected in sequence. The second vent groove is recessed on the surface of the extension 213b located on the first surface 2133 or on the surface of the extension 213b located on the second surface 2134. Alternatively, the venting channel 2132 may include a third vent groove, a first vent groove 2132b, a second vent groove, or a second vent hole 2132c connected in sequence. Both the third vent groove and the first vent groove 2132b are recessed on the second surface 2134.

[0289] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0290] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0291] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pump module (10), characterized in that, include: An integrated base (1) includes a base body (11) and a vent (12). The base body (11) includes a first mounting surface (111) and a second mounting surface (112) arranged opposite to each other. The first mounting surface (111) has a first air inlet (1111), and the second mounting surface (112) has a second air inlet (1121). The vent (12) is fixed to the base body (11) and located on the side of the first mounting surface (111) facing away from the second mounting surface (112). 1) It has a first air passage (113) and a second air passage (114) located between the first mounting surface (111) and the second mounting surface (112), the first air passage (113) connecting the first air inlet (1111) and the vent (12), the second air passage (114) connecting the second air inlet (1121) and the vent (12), and the ratio of the length of the first air passage (113) to the length of the second air passage (114) is in the range of 0.9 to 1.1; A first piezoelectric pump (2) is fixed to the first mounting surface (111) and connected to the first air inlet (1111); and The second piezoelectric pump (3) is fixed to the second mounting surface (112) and connected to the second air inlet (1121). The first airway (113) includes a first part and a second part that are connected. The cross-sectional area of ​​the first part is constant, and the cross-sectional area of ​​the second part is different from that of the first part. The ratio of the length of the second part to the length of the first airway (113) is less than or equal to 0.

1.

2. The pump module (10) as described in claim 1, characterized in that, The absolute value of the difference between the length of the first airway (113) and the length of the second airway (114) is less than or equal to 2 mm; Alternatively, the height of the first air passage (113) in the thickness direction of the seat (11) is in the range of 0.2 mm to 0.5 mm, and the width of the first air passage (113) is in the range of 1 mm to 2 mm.

3. The pump module (10) as described in claim 1 or 2, characterized in that, The extension path of the first airway (113) includes at least two straight segments and at least one curved segment, with adjacent straight segments smoothly connected by the curved segment; Alternatively, the extension path of the first airway (113) may include a straight segment and at least one curved segment; Alternatively, the extension path of the first airway (113) is in the shape of a spline curve.

4. The pump module (10) as described in any one of claims 1 to 3, characterized in that, There are multiple first piezoelectric pumps (2), and the number of first air inlets (1111) and first air passages (113) is the same as the number of first piezoelectric pumps (2), and one first piezoelectric pump (2) corresponds to one first air inlet (1111) and one first air passage (113). or, There are multiple second piezoelectric pumps (3), and the number of second air inlets (1121) and second air passages (114) is the same as the number of second piezoelectric pumps (3), and one second piezoelectric pump (3) corresponds to one second air inlet (1121) and one second air passage (114).

5. The pump module (10) as described in any one of claims 1 to 4, characterized in that, The absolute value of the difference between the oscillation frequency of the first piezoelectric pump (2) and the oscillation frequency of the second piezoelectric pump (3) is less than or equal to 0.6 kHz.

6. The pump module (10) as described in any one of claims 1 to 5, characterized in that, The seat (11) includes a first seat (11a) and a second seat (11b) that are sealed together. The first seat (11a) has a first mounting surface (111). The first seat (11a) has a first strip groove (113a), a second strip groove (114a), and a first manifold (115a) facing the second seat (11b). One end of the first strip groove (113a) is connected to the first air inlet (1111), and the other end of the first strip groove (113a) is connected to the first manifold (115a). One end of the second strip groove (114a) is connected to the first manifold (115a). The second seat (11b) has a second mounting surface (112), and the second seat (11b) has a third strip groove (113b), a fourth strip groove (114b) and a second confluence groove (115b) facing the first seat (11a). One end of the third strip groove (113b) is connected to the second confluence groove (115b), one end of the fourth strip groove (114b) is connected to the second air inlet (1121), and the other end of the fourth strip groove (114b) is connected to the second confluence groove (115b). The first strip groove (113a) and the third strip groove (113b) cooperate to form the first air passage (113), the second strip groove (114a) and the fourth strip groove (114b) cooperate to form the second air passage (114), the first confluence groove (115a) and the second confluence groove (115b) cooperate to form a confluence channel (115), and the confluence channel (115) is connected to the vent (12).

7. The pump module (10) as described in claim 6, characterized in that, The second seat (11b) also has a dispensing groove (117), which is separated from the third strip groove (113b) and from the fourth strip groove (114b); Alternatively, the first seat (11a) has a dispensing groove (117) which is separated from the first strip groove (113a) and from the second strip groove (114a).

8. The pump module (10) as described in any one of claims 1 to 7, characterized in that, The pump module (10) also includes a sealing ring (4), which is located between the first mounting surface (111) and the first piezoelectric pump (2) and seals the connection between the base (11) and the first piezoelectric pump (2), and the sealing ring (4) surrounds the first air inlet (1111).

9. The pump module (10) as described in claim 8, characterized in that, The pump module (10) further includes a vibration isolation layer (5), which abuts between the first mounting surface (111) and the first piezoelectric pump (2). The vibration isolation layer (5) is a flexible material or an elastic material.

10. The pump module (10) as described in any one of claims 1 to 7, characterized in that, The base (11) is provided with a mounting groove (1112), the opening of the mounting groove (1112) is located on the first mounting surface (111), and the mounting groove (1112) is arranged around the first air inlet (1111). The pump module (10) also includes a sealing ring (4), which is located in the mounting groove (1112) and surrounds the first air inlet (1111). The sealing ring (4) seals and connects the base (11) and the first piezoelectric pump (2).

11. The pump module (10) as described in claim 10, characterized in that, The pump module (10) further includes a vibration isolation layer (5), which is disposed in the mounting groove (1112) and abuts against the bottom of the mounting groove (1112) and the first piezoelectric pump (2). The vibration isolation layer (5) is a flexible material or an elastic material.

12. The pump module (10) as described in any one of claims 1 to 11, characterized in that, The first piezoelectric pump (2) has a vent (2132e) which is connected to the first air inlet (1111). The integrated base (1) also includes a limiting platform (116), which is fixed to the base body (11) and protrudes relative to the first mounting surface (111). The limiting platform (116) is located on the periphery of the first piezoelectric pump (2). The limiting platform (116) is provided with a relief groove (1161), which is provided to avoid the vent (2132e).

13. The pump module (10) as described in any one of claims 1 to 12, characterized in that, The first piezoelectric pump (2) also has an air inlet (2141), an air outlet (2111) and at least two venting channels (2132), wherein the air inlet (2141) is connected to the first air outlet (1111). When the pump module (10) is inflated, the air port (2111) is connected to the air vent (2141), and the air vent (2141) is isolated from at least two of the venting channels (2132). Gas flows out sequentially through the air port (2111), the air vent (2141), the first air outlet (1111), the first air passage (113), and the air nozzle (12). When the pump module (10) is depressurized, the vent (2141) is connected to at least two of the depressurization channels (2132), and the air inlet (2111) is separated from the vent (2141). The gas is depressurized sequentially through the vent (12), the first air outlet (1111), the first air passage (113), the vent (2141), and at least two of the depressurization channels (2132).

14. The pump module (10) as described in claim 13, characterized in that, The first piezoelectric pump (2) includes a front chamber (21), a piezoelectric vibrator (22), and a rear chamber (23) stacked sequentially. The front chamber (21) includes: The base (211) has the air port (2111) for receiving the gas generated by the vibration of the piezoelectric vibrator (22); A venting membrane (212) is located on the side of the base (211) away from the piezoelectric vibrator (22), and the venting membrane (212) has a first through hole (2121). A venting channel layer (213) is located on the side of the venting membrane (212) away from the base (211). The venting channel layer (213) has a second through hole (2131) and at least two venting channels (2132) disposed around the second through hole (2131). The venting channels (2132) are spaced apart from the second through hole (2131), and at least a portion of the venting channels (2132) communicates with the outside of the first piezoelectric pump (2). A ventilation layer (214) is located on the side of the venting channel layer (213) away from the venting membrane (212). The ventilation layer (214) has the vent (2141) which is connected to the second through hole (2131). When the pump module (10) is inflated, the gas enters the base (211) through the air port (2111), and the gas pushes the venting membrane (212) to bend toward the venting channel layer (213), and flows out in sequence through the first through hole (2121), the second through hole (2131) and the air port (2141); When the pump module (10) deflates, the gas enters the second through hole (2131) through the vent (2141), the gas pushes the vent membrane (212) to bend toward the base (211), and is discharged through at least two of the vent channels (2132).

15. The pump module (10) as described in claim 14, characterized in that, The base (211) includes a base (2112) and a first boss (2113). The base (2112) has a groove (2114) facing the vent membrane (212). The first boss (2113) protrudes from the bottom wall of the groove (2114). The air port (2111) surrounds the first boss (2113) and penetrates the bottom wall of the groove (2114). The venting membrane (212) includes a membrane body (2122) and a second protrusion (2123). The membrane body (2122) is located on the side of the base (211) away from the piezoelectric vibrator (22). The membrane body (2122) covers the groove (2114). The second protrusion (2123) protrudes from the surface of the membrane body (2122) facing the base (2111). The second protrusion (2123) abuts against the first protrusion (2113). The first through hole (2121) penetrates the membrane body (2122) and the second protrusion (2123). The opening of the first through hole (2121) near the base (2111) is blocked by the first protrusion (2113). When the pump module (10) is inflated, the gas enters the groove (2114) through the air port (2111). The gas pushes the venting membrane (212) to bend toward the second through hole (2131). The second boss (2123) disengages from the first boss (2113). The first through hole (2121) connects to the groove (2114), and the venting membrane (212) abuts against the venting channel layer (213). The second through hole (2131) is separated from the venting channel (2132). When the pump module (10) deflates, the gas enters the second through hole (2131) through the vent (2141). The gas pushes the vent membrane (212) to bend toward the groove (2114). The second boss (2123) abuts against the first boss (2113). The first through hole (2121) is separated from the groove (2114). The portion of the vent membrane (212) between the vent channel (2132) and the second through hole (2131) disengages from the vent channel layer (213). The second through hole (2131) connects to the vent channel (2132).

16. The pump module (10) as described in claim 15, characterized in that, The air venting layer (213) includes a first surface (2133), a second surface (2134), and a side surface (2135). The first surface (2133) faces the ventilation layer (214), the second surface (2134) is disposed opposite to the first surface (2133), and the side surface (2135) connects the first surface (2133) and the second surface (2134). The venting channel (2132) includes a first venting hole (2132a) and a first venting groove (2132b). The first venting hole (2132a) penetrates the first surface (2133) and the second surface (2134). The first venting groove (2132b) is recessed in the first surface (2133) or the second surface (2134). One end of the first venting groove (2132b) is connected to the first venting hole (2132a), and the other end of the first venting groove (2132b) penetrates the side surface (2135) to form a vent (2132e). The flow cross-sectional area of ​​the first venting hole (2132a) is larger than the flow cross-sectional area of ​​the first venting groove (2132b). Alternatively, the venting channel (2132) includes a first vent (2132a) and a second vent (2132c), both the first vent (2132a) and the second vent (2132c) penetrating the first surface (2133) and the second surface (2134). One end of the second vent (2132c) is connected to the first vent (2132a), and the other end of the second vent (2132c) penetrates the side surface (2135) to form a vent (2132e). The flow cross-sectional area of ​​the first vent (2132a) is larger than the flow cross-sectional area of ​​the second vent (2132c).

17. The pump module (10) as described in claim 15, characterized in that, The venting channel layer (213) includes a venting body layer (213a) and at least two extensions (213b). The extensions (213b) are located on the outer periphery of the venting body layer (213a). The venting body layer (213a) includes a first surface (2133), a second surface (2134), and a side surface (2135). The first surface (2133) faces the venting layer (214). The first surface (2133) and the second surface (2134) are disposed opposite to each other. The side surface (2135) connects the first surface (2133) and the second surface (2134). The number of extensions (213b) is the same as the number of venting channels (2132), and one extension (213b) corresponds to one venting channel (2132). The venting channel (2132) includes a first venting hole (2132a), a first venting groove (2132b), and a third venting hole (2132d) connected in sequence. The first venting hole (2132a) penetrates the first surface (2133) and the second surface (2134). The first venting groove (2132b) is recessed in the first surface (2133) or the second surface (2134). The third venting hole (2132d) penetrates the extension (213b) in the direction from the first surface (2133) to the second surface (2134). The flow cross-sectional area of ​​the first venting hole (2132a) is larger than the flow cross-sectional area of ​​the first venting groove (2132b). Alternatively, the venting channel (2132) includes a first vent (2132a), a second vent (2132c), and a third vent (2132d) connected in sequence. The first vent (2132a) and the second vent (2132c) penetrate the first surface (2133) and the second surface (2134). The third vent (2132d) penetrates the extension (213b) in the direction from the first surface (2133) to the second surface (2134). The flow cross-sectional area of ​​the first vent (2132a) is larger than that of the second vent (2132c).

18. A wearable device (1000), characterized in that, The wearable device (1000) includes: Body (100), said body (100) comprising the pump module (10) as described in any one of claims 1 to 17; and The fixing strap (200) includes an airbag (200a), and the pump module (10) is used to inflate the airbag (200a).

19. The wearable device (1000) as claimed in claim 18, characterized in that, The main body (100) further includes a controller (20), a first drive circuit (301) and a second drive circuit (302). The first drive circuit (301) and the second drive circuit (302) are connected in parallel and are both electrically connected to the controller (20). The first drive circuit (301) is electrically connected to the first piezoelectric pump (2), and the second drive circuit (302) is electrically connected to the second piezoelectric pump (3). The controller (20) controls the first drive circuit (301) to drive the first piezoelectric pump (2) and controls the second drive circuit (302) to drive the second piezoelectric pump (3) through the same control signal.

20. The wearable device (1000) as claimed in claim 19, characterized in that, The main body (100) also includes: A pressure sensor (40) is electrically connected to the controller (20); and An air circuit adapter (50) has a channel with a first end (501) and a second end (502) arranged opposite to each other. The first end (501) is connected to the vent (12). The second end (502) includes a first side (5021) and a second side (5022) arranged opposite to each other. The first side (5021) is connected to the airbag (200a). The second side (5022) is connected to the air pressure sensor (40). The air pressure sensor (40) is used to detect the current air pressure value of the pump module (10) inflating the airbag (200a) and transmit it to the controller (20).

21. The wearable device (1000) as claimed in claim 20, characterized in that, The controller (20) is used to adjust the duty cycle of the control signal according to the current air pressure value so that the current air pressure value changes linearly with time.

22. The wearable device (1000) as claimed in claim 20 or 21, characterized in that, The second side (5022) is provided with a detection airway (5023), the detection airway (5023) has at least one bend, and the detection airway (5023) connects the channel in the airway adapter (50) to the air pressure sensor (40).

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