Pump module and wearable device

Abstract

The invention provides a pump module and wearable equipment. 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 ventilation nozzle, the seat body comprises a first mounting surface and a second mounting surface which are arranged oppositely, the first mounting surface is provided with a first gas transmission port, and the second mounting surface is provided with a second gas transmission port; the ventilation nozzle is fixed to the base body and located on the side, opposite to the second installation face, of the first installation face, the base body is provided with a first air channel and a second air channel which are located between the first installation face and the second installation face, and the first air channel communicates with the first air conveying opening and the ventilation nozzle; the second piezoelectric pump is fixed to the second mounting face and communicates with the second gas conveying opening. The first piezoelectric pump and the second piezoelectric pump are respectively integrated to the first mounting surface and the second mounting surface of the integrated seat, so that the pump module is low in noise, small in size and large in flow.

Description

Technical Field

[0001] The present application relates to the field of wearable devices, and in particular to a pump module and a wearable device. Background Art

[0002] The airbag volume of the traditional upper arm sphygmomanometer is large, and a large flow pump is required for inflation. Generally, a mechanical pump is used for inflation and pressure increase. The solution of mechanical pumps for traditional sphygmomanometers is mature, but the noise is loud and the volume is large, which reduces the comfort of measurement and restricts the further reduction of the device volume. Piezoelectric pumps are silent, but the flow rate is small. However, if piezoelectric pumps are used in sphygmomanometers with larger airbags, the technical problem of insufficient flow needs to be solved. Therefore, it is necessary to design an inflation device with low noise, small volume and high flow rate. Summary of the invention

[0003] The purpose of the present 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, has low noise, small size and large flow rate.

[0004] In the first aspect, the present application provides a pump module, including an integrated seat, a first piezoelectric pump and a second piezoelectric pump. The integrated seat includes a seat body and a vent nozzle. The seat body includes a first mounting surface and a second mounting surface arranged opposite to each other. The first mounting surface is provided with a first air supply port, and the second mounting surface is provided with a second air supply port. The vent nozzle is fixed to the seat body and is located on the side of the first mounting surface facing away from the second mounting surface. The seat body has a first air duct and a second air duct located between the first mounting surface and the second mounting surface. The first air duct connects the first air supply port and the vent nozzle, and the second air duct connects the second air supply port and the vent nozzle, and the ratio of the length of the first air duct to the length of the second air duct 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 supply port. The second piezoelectric pump is fixed to the second mounting surface and connected to the second air supply port.

[0005] In the present application, the design of multiple piezoelectric pumps is also referred to as a multi-piezoelectric pump cascade. By setting up multiple piezoelectric pump cascades, the pump module can be inflated at the same time, so that the flow rate of the pump module is significantly increased, and a large flow rate requirement can be met, such as the flow rate requirement of an upper arm sphygmomanometer. By setting the length of the transmission path of the gas in the first airway to be equal to or the difference between the length of the transmission path of the gas in the second airway is small, the flow resistance of the gas in the first airway is small compared to the flow resistance of the gas in the second airway, and the air pressure of the gas transmitted to the confluence channel through the first airway is small compared to the air pressure of the gas transmitted to the confluence channel through the second airway, thereby improving the gas outlet stability of the pump module. Since the piezoelectric pump itself has the characteristics of being silent, the pump module provided in the present application can achieve a large flow rate, silence and no vibration.

[0006] In some possible implementations, the first airway includes a first portion and a second portion that are connected, the cross-sectional area of ​​the first portion is constant, the cross-sectional area of ​​the second portion is different from the cross-sectional area of ​​the first portion, and the ratio of the length of the second portion 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 first air channel has fewer variable cross-section parts, thereby avoiding excessive flow resistance of gas transmission in the first air channel, reducing air pressure loss, and helping to improve the stability of the gas outlet of the pump module.

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

[0009] In the present implementation, by setting the difference between the length of the first air channel and the length of the second air channel, the length of the gas transmission path in the first air channel and the length of the gas transmission path in the second air channel can be made to have a small deviation, thereby making the flow resistance encountered by the gas in the first air channel and the flow resistance encountered by the gas in the second air channel slightly different, thereby making the air pressure of the gas transmitted to the confluence channel through the first air channel and the air pressure of the gas transmitted to the confluence channel through the second air channel slightly different, thereby improving the gas outlet stability of the pump module.

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

[0011] In this implementation, by setting the height and width of the first air channel, it is possible to ensure the size of the cross-sectional area of ​​the first air channel to prevent excessive flow resistance while reducing the space occupied by the first air channel in the thickness direction of the seat body, which is beneficial to the lightweight design of the seat body and thus helps to reduce 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, and two adjacent straight segments are smoothly connected by the curved segment.

[0013] In the present implementation, two adjacent straight line segments are smoothly connected by a curved segment, so that the two adjacent straight line segments can be smoothly connected without right angles, thereby reducing the flow resistance of the gas in the process of being transmitted from one straight line segment to another adjacent straight line segment in the first airway, thereby reducing the flow loss of the gas caused by changing the transmission direction in the first airway, and increasing the air pressure when the gas is transmitted from the first airway 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 line segment and at least one curved line segment.

[0015] In this implementation, the straight segment can be directly connected to the first gas delivery port or the converging channel to reduce the pressure loss when the gas flows from the first gas delivery port into the first gas channel or to reduce the pressure loss when the gas flows from the first gas channel into the converging channel. Alternatively, one end of the straight segment is smoothly connected to the first gas delivery port through a curved segment, and the other end of the straight segment is smoothly connected to the converging channel through a curved segment to reduce the pressure loss when the gas flows from the first gas delivery port into the first gas channel and changes the transmission direction, and to reduce the pressure loss when the gas flows from the first gas channel into the converging channel and changes the 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 can reduce the flow resistance of the gas in the first airway, reduce the pressure loss when the gas flows from the first air delivery port into the first airway and changes the transmission direction, and reduce the pressure loss when the gas flows from the first airway into the confluence channel and changes the transmission direction, which is beneficial to improving the gas outlet effect of the pump module. The spline curve is a smooth curve, and the arc is a special curve in the spline curve. Therefore, at least part of the extension path of the first airway is an arc, which also falls within the protection scope of this application.

[0018] In some possible implementations, there are multiple first piezoelectric pumps, the number of first gas delivery ports and first air channels is the same as the number of first piezoelectric pumps, and one first piezoelectric pump corresponds to one first gas delivery port and one first air channel. Or, there are multiple second piezoelectric pumps, the number of second gas delivery ports and second air channels is the same as the number of second piezoelectric pumps, and one second piezoelectric pump corresponds to one second gas delivery port and one second air channel.

[0019] In this implementation, by providing a plurality of first piezoelectric pumps and / or a plurality of second piezoelectric pumps, the gas output of the pump module can be increased, and the flow rate of the pump module can be increased.

[0020] Among them, the number of first piezoelectric pumps is less than or equal to the number of second piezoelectric pumps, so that the seat body has a relatively sufficient and flexible arrangement space on the side of its first mounting surface facing away from the second mounting surface for arranging the ventilation nozzle, thereby improving the space utilization of the pump module and improving the integration of the pump module, which is conducive to the miniaturization of the pump module on the basis of achieving a large flow rate.

[0021] The orthographic projections of all the first piezoelectric pumps on the second mounting surface fall within the area occupied by all the second piezoelectric pumps on the second mounting surface, so that the first piezoelectric pumps do not occupy more area of ​​the seat body in the plane where the first mounting surface is located, thereby improving the space utilization rate of the seat body. The area occupied by all the second piezoelectric pumps on the second mounting surface refers to the orthographic projections of the area formed by the outermost edges of all the second piezoelectric pumps connected in sequence on the second mounting surface.

[0022] In some possible implementations, an absolute value of a difference between an oscillation frequency of the first piezoelectric pump and an 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 close to the optimal operating frequency of the first piezoelectric pump and the second piezoelectric pump can improve the consistency of the gas outlet between the first piezoelectric pump and the second piezoelectric pump, thereby facilitating the linear increase of the gas pressure of the pump module outlet to the required pressure value.

[0024] In some possible implementations, the seat body includes a first seat and a second seat that are sealed and connected. The first seat has a first mounting surface, and the first seat has a first strip groove, a second strip groove, and a first confluence groove facing the second seat. One end of the first strip groove is connected to the first gas delivery port, and the other end of the first strip groove is connected to the first confluence groove. One end of the second strip groove is connected to the first confluence groove. The second seat has a second mounting surface. The second seat has a third strip groove, a fourth strip groove, and a second confluence groove facing the first seat. One end of the third strip groove is connected to the second confluence groove. One end of the fourth strip groove is connected to the second gas delivery port, and the other end of the fourth strip groove is connected to the second confluence groove. Among them, the first strip groove cooperates with the third strip groove to form a first airway. The second strip groove cooperates with the fourth strip groove to form a second airway, the first confluence groove cooperates with the second confluence groove to form a confluence channel, and the confluence channel is connected to the vent.

[0025] In this implementation, by respectively opening strip grooves on the first seat and the second seat and then combining them into an airway, it is beneficial to the processing of the first seat, the second seat and the airway, and improves the yield rate of the integrated seat.

[0026] The first gas delivery port and the second gas delivery port are arranged alternately, and the portion of the first gas channel between the first gas delivery port and the confluence channel is separated from the portion of the second gas channel between the second gas delivery port and the confluence channel. In this implementation, by separating the first gas channel and the second gas channel outside the confluence channel, it is possible to avoid the gas in the first gas channel and the gas in the second gas channel from confluence before entering the confluence channel, thereby reducing the flow resistance of the gas before entering the confluence channel, and avoiding the gas in the first gas channel and the gas in the second gas channel from generating vortex and turbulence before entering the confluence channel, which is beneficial to the stable gas outlet of the pump module.

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

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

[0029] The dispensing groove is arranged around the third strip groove and the fourth strip groove, which is beneficial to sealing the first airway and the second airway. The dispensing groove is arranged around the entire outer circumference of the third strip groove and the fourth strip groove, or the dispensing groove is arranged in the interval area between the third strip groove and the fourth strip groove, or part of the dispensing groove is arranged around the entire outer circumference of the third strip groove and the fourth strip groove, and the other part is arranged in the interval area between the third strip groove and the fourth strip groove.

[0030] The second seat further comprises a column, one end of which is fixedly connected to the bottom wall of the glue dispensing groove, and the other end of which is attached to the surface of the first seat facing the second seat, and the column is arranged in the area surrounded by the first strip groove, the area surrounded by the second strip groove, and the interval area between the first strip groove and the second strip groove. In this implementation, the design of the column can prevent the area of ​​the glue dispensing groove from being too large, which is conducive to the uniform arrangement of the glue and improves the bonding and sealing effect of the first seat and the second seat.

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

[0032] In this implementation, the glue dispensing groove is used to set the adhesive to bond the first seat and the second seat together, thereby improving the sealing performance after the first seat and the second seat are connected, thereby improving the sealing performance of the integrated seat. In addition, the second seat can also be provided with a column, and the setting method is the same as the implementation method of the first seat being provided with a glue dispensing groove and a column.

[0033] In some possible implementations, the pump module further includes a sealing ring, which is disposed between the first mounting surface and the first piezoelectric pump and seals the seat body and the first piezoelectric pump, and the sealing ring is disposed around the first air delivery port.

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

[0035] The outer peripheral side of the sealing ring may be provided with a sealant, and the sealant is fixedly connected to 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. In addition, 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 further includes a vibration isolation layer, the vibration isolation layer is abutted between the first mounting surface and the first piezoelectric pump, and the vibration isolation layer is a flexible material or an elastic material.

[0037] In this implementation, a vibration isolation layer is provided to provide a buffer area between the first piezoelectric pump and the first seat, so as to reduce or even eliminate the vibration transmitted to the first seat when the first piezoelectric pump is working. Similarly, the vibration isolation layer is provided between the second piezoelectric pump and the second seat, which can also reduce or even eliminate the vibration transmitted to the second seat when the second piezoelectric pump is working, thereby reducing or even eliminating the interference of the mutual vibration between the first piezoelectric pump and the second piezoelectric pump when working, thereby improving the consistency of the operation of the first piezoelectric pump and the second piezoelectric pump, and improving the gas outlet stability of the pump module. In addition, in this implementation, the noise of the first piezoelectric pump when working can be reduced by providing a vibration isolation layer, which is conducive to further silencing the pump module and improving the user experience.

[0038] The vibration isolation layer may be an integral layer or a plurality of spaced apart parts. The vibration isolation layer may be, but not limited to, foam, gel-like materials, etc. For example, the thickness of the vibration isolation layer is less than 1 mm, for example, the thickness of the vibration isolation layer may be, but not limited to, 0.9 mm, or 0.8 mm, or 0.7 mm, or 0.6 mm, or 0.5 mm, or other values ​​less than 1 mm.

[0039] In some possible implementations, the seat body is provided with a mounting groove, the opening of the mounting groove is located on the first mounting surface, and the mounting groove is arranged around the first gas delivery port. The pump module also includes a sealing ring, which is arranged in the mounting groove and around the first gas delivery port, and the sealing ring seals and connects the seat body and the first piezoelectric pump.

[0040] In this implementation, the mounting groove can accommodate the sealing ring to reduce the overall thickness of the first seat and the first piezoelectric pump after being fixedly connected, thereby reducing the overall thickness of the pump module, which is conducive to the thin and light design of the pump module. The sealing ring seals the first gas delivery port and the vent, which can prevent the gas from overflowing when the first piezoelectric pump discharges gas to the first gas delivery port, improves the air tightness of the junction between the vent and the first gas delivery port, and improves the effect of the first piezoelectric pump discharging gas to the first seat.

[0041] Among them, a sealant is provided on the outer peripheral side of the sealing ring, and the sealant is located in the installation groove. The sealant is fixedly connected to the bottom of the installation groove and the surface of the first piezoelectric pump facing the first seat to cooperate with the sealing ring to seal the first piezoelectric pump and the first seat, thereby improving the sealing effect of the first piezoelectric pump and the first seat.

[0042] In some possible implementations, the pump module further includes a vibration isolation layer, which is disposed in the mounting groove and abuts between the bottom of the mounting groove and the first piezoelectric pump, and the vibration isolation layer is a flexible material or an elastic material.

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

[0044] Among them, the vibration isolation layer can be an integral layer or multiple parts arranged at intervals. The sealing ring is arranged in the mounting groove, and is arranged between the bottom of the mounting groove and the first piezoelectric pump, and the sealing ring is arranged around the first air supply port to improve the air tightness at the junction of the vent and the first air supply port. The outer peripheral side of the sealing ring is provided with a sealant, and the sealant is fixedly connected to the bottom of the mounting groove and the surface of the first piezoelectric pump facing the first seat to improve the sealing effect between the first piezoelectric pump and the first seat. The vibration isolation layer abuts between the bottom of the mounting groove and the first piezoelectric pump, and the vibration isolation layer is arranged on the outer peripheral side of the sealant to reduce the thickness of the pump module, which is conducive to the lightweight design of the pump module. Among them, the vibration isolation layer abuts between the bottom of the mounting groove and the first piezoelectric pump means that the surface of one side of the vibration isolation layer is attached to the bottom of the mounting groove, and the surface of the other side of the vibration isolation layer is attached to the surface of the first piezoelectric pump facing the first seat.

[0045] In some possible implementations, the first piezoelectric pump has an air release port, which is connected to the first air delivery port. The integrated seat also includes a limit platform, which is fixed to the seat body and protrudes relative to the first mounting surface. The limit platform is arranged on the peripheral side of the first piezoelectric pump, and the limit platform is provided with an avoidance groove, which avoids the air release port.

[0046] In this implementation, the air leakage port of the first piezoelectric pump is located in the avoidance groove to achieve avoidance of the air leakage port.

[0047] In some possible implementations, the first piezoelectric pump further has a vent, an air port, and at least two air leakage channels, and the vent is connected to the first air supply port. When the pump module is inflated, the air port is connected to the vent, and the vent is isolated from the at least two air leakage channels, and the gas flows out through the air port, the vent, the first air supply port, the first air channel, and the vent nozzle in sequence. When the pump module is deflated, the vent is connected to the at least two air leakage channels, and the air port is isolated from the vent, and the gas is discharged through the vent nozzle, the first air supply port, the first air channel, the vent, and at least two air leakage channels in sequence.

[0048] In this implementation, by providing at least two air leakage channels, air leakage can be accelerated, and measurement comfort and safety can be achieved. Moreover, by designing at least two air leakage channels, no additional space is required for the device, which is conducive to the miniaturization design of the first piezoelectric pump. Since the first piezoelectric pump has at least two air leakage channels, it can avoid the failure of air leakage when a single air leakage channel fails.

[0049] In some possible implementations, the first piezoelectric pump includes a front cavity, a piezoelectric vibrator and a rear cavity stacked in sequence, and the front cavity includes a base, a leakage channel layer and a ventilation layer. The base has an air port, and the air port is used to receive the gas generated by the vibration of the piezoelectric vibrator. The gas film is located on the side of the base away from the piezoelectric vibrator, and the leakage film has a first through hole. The leakage channel layer is located on the side of the leakage film away from the base, and the leakage channel layer has a second through hole and at least two leakage channels arranged around the second through hole. The leakage channel is spaced from the second through hole and at least part of the leakage channel is connected to the outside of the first piezoelectric pump. The ventilation layer is located on the side of the leakage channel layer away from the leakage film, and the ventilation layer has a vent, and the vent is connected to the second through hole. When the pump module is inflated, the gas enters the base through the air port, and the gas pushes the leakage film to bend in the direction of the leakage channel layer, and flows out through the first through hole, the second through hole and the vent in sequence. When the pump module is deflated, the gas enters the second through hole through the vent, the gas pushes the deflation membrane to bend toward the base, and the gas is deflated through at least two deflation channels.

[0050] In this implementation, the second through hole and at least two air leakage channels are connected and disconnected by bending deformation of the air leakage membrane. The at least two air leakage channels do not need to be powered, and only need to cooperate with the flexible air leakage membrane to realize the opening and closing of the air leakage function under the air pressure difference.

[0051] In some possible implementations, the base includes a base and a first boss. The base has a groove arranged toward the air leakage membrane, the first boss is convexly arranged on the bottom wall of the groove, and the air port surrounds the first boss and passes through the bottom wall of the groove. The air leakage membrane includes a membrane body and a second boss. The membrane body is located on the side of the base away from the piezoelectric vibrator, and the membrane body blocks the groove. The second boss is convexly arranged on the surface of the membrane body facing the base, and the second boss abuts the first boss. The first through hole passes through the membrane body and the second boss, and the opening of the first through hole close to the base is blocked by the first boss. When the pump module is inflated, the gas enters the groove through the air port, and the gas pushes the air leakage membrane to bend toward the second through hole, the second boss is out of contact with the first boss, the first through hole is connected to the groove, and the air leakage membrane abuts against the air leakage flow channel layer, and the second through hole is separated from the air leakage channel. When the pump module deflates, the gas enters the second through hole through the vent, and the gas pushes the deflation membrane to bend toward the inside of the groove, the second boss abuts against the first boss, the first through hole is separated from the groove, and the part of the deflation membrane corresponding to the deflation channel and the second through hole is out of contact with the deflation channel layer, and the second through hole is connected to the deflation channel.

[0052] In this implementation, the first boss of the base overlaps with the second boss of the deflation membrane to separate the air port and the vent. The contact area between the base and the deflation membrane is small. When the pump module is deflated, the gas on the side of the deflation membrane close to the vent acts on the deflation membrane, which can make the pressure of the mutual contact between the deflation membrane and the base greater, which is more effective in separating the air port and the vent, and improves the stability during deflation. In addition, since the contact area between the base and the deflation membrane is small, when the pump module is inflated, the gas on the side of the deflation membrane close to the air port is more likely to drive the part of the deflation membrane close to the first boss to move toward the vent, which is beneficial to the conduction of the air port and the vent, and improves the inflation efficiency.

[0053] In some possible implementations, the leakage flow channel layer includes a first surface, a second surface and a side surface. The first surface faces the ventilation layer, the second surface is arranged opposite to the first surface, and the side surface connects the first surface and the second surface. The leakage channel includes a first leakage hole and a first leakage groove, and the first leakage hole runs through the first surface and the second surface. The first leakage groove is recessed in the first surface or the second surface, one end of the first leakage groove is connected to the first leakage hole, and the other end of the first leakage groove runs through the side surface to form a leakage port. Among them, the flow cross-sectional area of ​​the first leakage hole is larger than the flow cross-sectional area of ​​the first leakage groove.

[0054] In this implementation, when the first air leakage groove is recessed in the first surface, the opening of the first air leakage groove facing the ventilation layer can be sealed by the air leakage channel layer and the ventilation layer, and the air leakage channel layer does not need to be sealed on the side of the first air leakage groove away from the ventilation layer, thereby improving the air sealing of the air leakage channel and facilitating the stable air leakage of the air leakage channel. When the first air leakage groove is recessed in the second surface, the first air leakage groove has an opening facing the air leakage membrane. When the first piezoelectric pump is deflated, the air leakage membrane bends toward the base so that the first air leakage hole and the first air leakage groove are exposed at the same time, so that the deflated gas can enter the first air leakage hole and the first air leakage groove at the same time, thereby increasing the deflation flow rate and improving the deflation efficiency. The flow cross-sectional area of ​​the first air leakage hole is larger than the flow cross-sectional area of ​​the first air leakage groove, so that when the first piezoelectric pump is deflated, the gas can quickly enter the first air leakage hole and play a role of buffering and caching, and when the gas flows from the first air leakage hole with a larger flow cross-sectional area to the first air leakage groove with a smaller flow cross-sectional area, the flow speed of the gas can be increased, thereby increasing the deflation speed.

[0055] In some possible implementations, the air leakage channel includes a first air leakage hole and a second air leakage hole, both of which pass through the first surface and the second surface, one end of the second air leakage hole is connected to the first air leakage hole, and the other end of the second air leakage hole passes through the side to form an air leakage port, wherein the flow cross-sectional area of ​​the first air leakage hole is greater than the flow cross-sectional area of ​​the second air leakage hole.

[0056] In this implementation, the first air leakage hole and the second air leakage hole both penetrate the first surface and the second surface, thereby increasing the channel size of the air leakage channel, which is beneficial to increasing the air leakage speed of the air leakage channel. In addition, the second air leakage hole has an opening facing the air leakage membrane. When the first piezoelectric pump is deflated, the air leakage membrane bends toward the base so that the first air leakage hole and the second air leakage hole are exposed at the same time, so that the deflated gas can enter the first air leakage hole and the second air leakage hole at the same time, thereby increasing the air leakage flow rate and improving the air leakage efficiency. The flow cross-sectional area of ​​the first air leakage hole is larger than the flow cross-sectional area of ​​the second air leakage hole, so that when the first piezoelectric pump is deflated, the gas can quickly enter the first air leakage hole and play a role of buffer cache, and when the gas flows from the first air leakage hole with a larger flow cross-sectional area to the second air leakage hole with a smaller flow cross-sectional area, the flow speed of the gas can be increased, thereby increasing the air leakage speed.

[0057] In some possible implementations, the leakage flow channel layer includes a leakage body layer and at least two extensions. The extension is arranged at the outer periphery of the leakage body layer, and the leakage body layer includes a first surface, a second surface and a side surface. The first surface faces the ventilation layer, the first surface and the second surface are arranged opposite to each other, and the side surface connects the first surface and the second surface. The number of extensions is the same as the number of leakage channels, and one extension corresponds to one leakage channel. The leakage channel includes a first leakage hole, a first leakage groove and a third leakage hole connected in sequence. The first leakage hole runs through the first surface and the second surface, the first leakage groove is recessed in the first surface or the second surface, and the third leakage hole runs through the extension in the direction from the first surface to the second surface. Among them, the flow cross-sectional area of ​​the first leakage hole is larger than the flow cross-sectional area of ​​the first leakage groove.

[0058] In this implementation, the extension part is extended relative to the air leakage body layer to protrude from the first piezoelectric pump, and the third air leakage hole penetrates the extension part and forms two air leakage ports arranged opposite to each other on two opposite surfaces of the extension part, which can reduce the risk of blockage of the air leakage hole, and the double air leakage ports can improve the air leakage efficiency. When the first air leakage groove is recessed in the first surface, the opening of the first air leakage groove facing the ventilation layer can be fitted with the ventilation layer through the air leakage channel layer to achieve sealing, and the side of the air leakage channel layer away from the ventilation layer at the first air leakage groove does not need to be sealed, which improves the air sealing of the air leakage channel and is conducive to the stable air leakage of the air leakage channel. When the first air leakage groove is recessed in the second surface, the first air leakage groove has an opening facing the air leakage membrane. When the first piezoelectric pump is deflated, the air leakage membrane bends toward the base so that the first air leakage hole and the first air leakage groove are exposed at the same time, so that the deflated gas can enter the first air leakage hole and the first air leakage groove at the same time, thereby increasing the air leakage flow rate and improving the air leakage efficiency. The flow cross-sectional area of ​​the first air leakage hole is larger than the flow cross-sectional area of ​​the first air leakage groove, so that when the first piezoelectric pump is deflated, the gas can quickly enter the first air leakage hole and act as a buffer cache, and when the gas flows from the first air leakage hole with a larger flow cross-sectional area to the first air leakage groove with a smaller flow cross-sectional area, the flow speed of the gas can be increased, thereby increasing the deflation speed.

[0059] In some possible implementations, the air leakage channel includes a first air leakage hole, a second air leakage hole, and a third air leakage hole connected in sequence. The first air leakage hole and the second air leakage hole penetrate the first surface and the second surface, and the third air leakage hole penetrates the extension portion in the direction from the first surface to the second surface. The flow cross-sectional area of ​​the first air leakage hole is greater than the flow cross-sectional area of ​​the second air leakage hole.

[0060] In this implementation, the first air leakage hole and the second air leakage hole both penetrate the first surface and the second surface, thereby increasing the channel size of the air leakage channel, which is beneficial to increasing the air leakage speed of the air leakage channel. In addition, the second air leakage hole has an opening facing the air leakage membrane. When the first piezoelectric pump is deflated, the air leakage membrane bends toward the base so that the first air leakage hole and the second air leakage hole are exposed at the same time, so that the deflated gas can enter the first air leakage hole and the second air leakage hole at the same time, thereby increasing the air leakage flow rate and improving the air leakage efficiency. The flow cross-sectional area of ​​the first air leakage hole is larger than the flow cross-sectional area of ​​the second air leakage hole, so that when the first piezoelectric pump is deflated, the gas can quickly enter the first air leakage hole and play a role of buffer cache, and when the gas flows from the first air leakage hole with a larger flow cross-sectional area to the second air leakage hole with a smaller flow cross-sectional area, the flow speed of the gas can be increased, thereby increasing the air leakage speed.

[0061] In a second aspect, the present application further provides a wearable device, the wearable device comprising a main body and a fixing belt. The main body comprises a pump module as described above. The fixing belt comprises an airbag, and the pump module is used to inflate the airbag.

[0062] In some possible implementations, the main body further includes a controller, a first drive circuit and a second drive circuit. The first drive circuit and the second drive circuit are arranged in parallel and are both 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, multiple drive circuits drive multiple piezoelectric pumps at the same time according to the same control signal, thereby improving the consistency of the gas output of multiple piezoelectric pumps, which is conducive to the inflation stability of the pump module. In addition, by setting up multiple drive circuits in parallel, the power supply current of a single piezoelectric pump can be reduced, which is convenient for the selection of piezoelectric pumps.

[0064] In some possible implementations, the main body also includes an air pressure sensor and an air circuit adapter. The air pressure sensor is electrically connected to the controller. The channel in the air circuit adapter has a first end and a second end that are arranged opposite to each other. The first end is connected to the ventilation nozzle, and the second end includes a first side and a second side that are arranged opposite to each other. The first side is connected to the air bag, and the second side is connected to the air pressure sensor. The air pressure sensor is used to detect the current air pressure value of the pump module to inflate the air bag and transmit it to the controller.

[0065] In this implementation, the air pressure sensor is used to detect the current air pressure value of the gas in the airbag when the pump module is working and transmit it to the controller, and the controller is used to adjust the duty cycle of the control signal according to the current air pressure value. By setting the air path adapter, not only can a gas channel be constructed between the pump module and the airbag, so that the relative position relationship between the pump module and the airbag can be set more flexibly, but also a buffer space is provided for the airflow through the gas channel for setting the air pressure sensor, and the air pressure sensor is arranged at the second end. By arranging the air pressure sensor and the vent nozzle at the two ends of the air path adapter spaced apart, it is possible to prevent the gas flowing out of the vent nozzle from quickly colliding with the air pressure sensor, thereby preventing the air pressure sensor from being damaged by excessive flow rate of the gas flowing out of the vent nozzle.

[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 increases linearly with time.

[0067] In this implementation, by adjusting the duty cycle of the control signal through the controller, the current air pressure value can be changed linearly with the increase in pressure over time, and the linear slope of the current air pressure value changing with the increase in pressure over 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 has at least one bending path, and the detection airway is connected to a channel in the airway adapter and an air pressure sensor.

[0069] In this implementation, since the detection airway has at least one curved path, the gas will slow down after flowing into the curved path, thereby reducing the flow rate of the gas flowing to the air pressure sensor, which is beneficial to the accuracy of the air pressure sensor in detecting the air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0071] Figure 2 yes Figure 1 An exploded schematic diagram of a partial structure of a 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 schematic diagram of the structure of the main body shown in another viewing angle;

[0074] Figure 4 yes Figure 3A A schematic block diagram showing the connection of a main body in a wearable device in some embodiments;

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

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

[0077] Figure 6 yes Figure 5A A three-dimensional exploded schematic diagram of the pump module shown;

[0078] Figure 7 yes Figure 6 The structural schematic diagram of the integrated seat shown in another viewing angle;

[0079] Fig. 8A yes Figure 6 A three-dimensional exploded schematic diagram of the integrated seat shown;

[0080] Figure 8B yes Fig. 8A The structural schematic diagram of the integrated seat shown in another viewing angle;

[0081] Fig. 9A yes Figure 6 The structure schematic diagram of the integrated seat shown is cut along the AA line;

[0082] Fig. 9B yes Figure 6 The structure schematic diagram of the integrated seat cut along line BB is shown;

[0083] Fig. 10A yes Figure 5A The pump module shown is a partial structural schematic diagram cut along line CC in some embodiments;

[0084] Fig. 10B yes Fig. 10A The pump module shown is provided with a structural schematic diagram of a sealing ring;

[0085] Fig. 10C yes Fig. 10A The schematic diagram of the structure of the pump module shown is provided with a vibration isolation layer;

[0086] Fig.11A yes Figure 5A The pump module shown is a partial structural schematic diagram cut along line CC in some other embodiments;

[0087] Fig. 11B yes Fig.11A The schematic diagram of the structure of the pump module shown is provided with a vibration isolation layer;

[0088] Fig. 12A yes Figure 4 The schematic diagram of the pressure increase of the gas in the airbag when the pump module is working is shown;

[0089] Fig. 12B yes Figure 4 A schematic diagram showing the change in the slope of the pressure increase of the gas in the airbag when the pump module is working;

[0090] Fig.13 yes Figure 2 A schematic diagram of the structure of the gas path adapter in the main body in some embodiments;

[0091] Fig.14 yes Figure 1 A schematic diagram of a partial cross-sectional structure of the main body of the wearable device shown at the gas path adapter;

[0092] Fig.15A yes Fig.13 A three-dimensional exploded schematic diagram of the gas path adapter shown;

[0093] Fig. 15B yes Fig.15A A schematic diagram of the gas path adapter shown in another viewing angle;

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

[0095] Fig. 16B yes Fig.16A The schematic structural diagram of the first piezoelectric pump shown in another viewing angle;

[0096] Fig.17 yes Fig. 16B A three-dimensional exploded schematic diagram of the first piezoelectric pump shown;

[0097] Fig.18A yes Fig.17 A schematic diagram of the structure of the front chamber in the first piezoelectric pump in some embodiments;

[0098] Fig.18B yes Fig.18A A three-dimensional exploded schematic diagram of the front cavity shown;

[0099] Fig.19A yes Fig.17 A schematic diagram of the structure of the front chamber in the first piezoelectric pump in other embodiments;

[0100] Fig.19B yes Fig.19A A three-dimensional exploded schematic diagram of the front cavity shown;

[0101] Fig. 20 yes Fig.19A The schematic diagram of the structure of the base in the front cavity in some embodiments is shown;

[0102] Fig.21 yes Fig.19A A schematic diagram of the structure of the air-deflation membrane in the front cavity in some embodiments is shown;

[0103] Fig.22A yes Fig.19A The front cavity shown is a partial structural schematic diagram cut along line DD in some embodiments;

[0104] Fig. 22B yes Fig.22A The schematic diagram of the structure when the front cavity is inflated is shown;

[0105] Fig. 22C yes Fig.22A The schematic diagram of the structure when the front cavity is deflated is shown;

[0106] Fig.23A yes Fig.19A The schematic diagram of the structure of the leakage flow channel layer in the front cavity in some embodiments is shown;

[0107] Fig. 23B yes Fig.23A The schematic diagram of the structure of the leakage flow channel layer cut along the EE line is shown;

[0108] Fig.24A yes Fig.19A The schematic diagram of the structure of the leakage flow channel layer in the front cavity in other embodiments is shown;

[0109] Fig. 24B yes Fig.24A The schematic diagram of the structure of the leakage flow channel layer cut along the FF line;

[0110] Fig.25A yes Fig.19A The schematic diagram of the structure of the leakage flow channel layer in the front cavity in some other embodiments;

[0111] Fig.25B yes Fig.25A The schematic diagram of the structure of the leakage channel layer cut along the GG line;

[0112] Fig.26A yes Fig.19A The schematic diagram of the structure of the leakage flow channel layer in the front cavity in some other embodiments;

[0113] Fig.26B yes Fig.26A The schematic diagram of the structure of the leakage flow channel layer cut along the HH line;

[0114] Fig.27A yes Fig.19A The schematic diagram of the structure of the leakage flow channel layer in the front cavity in some other embodiments;

[0115] Fig.27B yes Fig.27A The schematic diagram of the structure of the leakage flow channel layer cut along line II is shown;

[0116] Fig.28A yes Fig.19A The schematic diagram of the structure of the leakage flow channel layer in the front cavity in some other embodiments;

[0117] Fig.28B yes Fig.28A The schematic diagram of the structure of the leakage flow channel layer cut along the JJ line is shown. DETAILED DESCRIPTION

[0118] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0119] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be detachably connected or non-detachably connected; it can be directly connected or indirectly connected through an intermediate medium. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side", etc., are only reference directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two. In the embodiments of the present application, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", and "fourth" can explicitly or implicitly include one or more of the features.

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

[0121] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of the wearable device 1000 provided in some embodiments of the present application.

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

[0123] The fixing belt 200 is bendable and is used to be worn on the human body. For example, the fixing belt 200 may include a belt body 200b and an airbag, and the airbag is arranged inside the belt body 200b or fixed to the inner surface of the belt body 200b. The fixing belt 200 may be made of materials such as nylon to have flexibility; or, the fixing belt 200 may also adopt a metal chain structure. The belt body 200b may be a continuous structure, and the main body 100 is fixed to one side of the belt body 200b; or, the belt body 200b may include two parts, and the two parts of the belt body 200b are respectively connected to the two ends of the main body 100, and the airbag is arranged between the two parts of the belt body 200b, and can be arranged on one side of the main body 100. The embodiment of the present application does not strictly limit the specific implementation material, structure and connection structure of the fixing belt 200 with the main body 100.

[0124] Among them, the main body 100 can have detection and display functions. For example, the main body 100 can be inflated to detect the pressure change in the airbag to detect the user's blood pressure; the main body 100 can also present the blood pressure detection results. At this time, 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 measurement device, a lower limb blood pressure measurement device, a wearable wrist blood pressure measurement device, and other electronic products with blood pressure measurement functions.

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

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

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

[0128] Exemplarily, the housing 90 may include a receiving shell 90a and a cover plate 90b, and the receiving shell 90a and the cover plate 90b are detachably connected by a snap-on method to facilitate the disassembly and maintenance of the main body 100. In addition, the receiving shell 90a and the cover plate 90b are provided with matching threaded holes, and the connection strength between the receiving shell 90a and the cover plate 90b is strengthened by setting screws. The receiving shell 90a is provided with a cavity, and the cavity is used to accommodate other components of the main body 100. A ventilation interface 91 is provided on the side of the receiving shell 90a away from the cover plate 90b, and the ventilation interface 91 can be used to communicate with the airbag.

[0129] Exemplarily, the pump module 10 is used to connect to the airbag to inflate the airbag so that the wearable device 1000 can perform a test (such as a blood pressure test). In addition, after the test is completed, the pump module 10 can also be used to deflate the airbag. For example, the pump module 10 can be accommodated in the cavity, and the ventilation opening 121 of the pump module 10 can be connected to the ventilation interface 91.

[0130] Exemplarily, the air circuit adapter 50 can be accommodated in the cavity, and the air circuit adapter 50 connects the pump module 10 and the containing shell 90a, so that the channel in the air circuit adapter 50 connects the ventilation opening 121 of the pump module 10 and the ventilation interface 91, so that the gas flowing out of the pump module 10 through the ventilation opening 121 can be transmitted to the ventilation interface 91 through the air circuit adapter 50 for inflating the airbag 200a.

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

[0132] Exemplarily, the circuit board 60 can be accommodated in the cavity, and the controller 20 and the drive circuit 30 are fixed to and electrically connected to the circuit board 60. The drive circuit 30 is electrically connected to the pump module 10, and the controller 20 is used to control the drive circuit 30 to drive the pump module 10 to inflate the airbag 200a in response to the control signal. The air pressure sensor 40 is electrically connected to the circuit board 60, and its detection signal can be transmitted to the controller 20 through the 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, which is conducive to the miniaturization of the main body 100. The power supply 70 may be arranged side by side with the pump module 10 to avoid occupying too much size in the thickness direction of the main body 100, which is conducive to the thinness of the main body 100. The power supply 70 is electrically connected to the pump module 10, the controller 20 and the drive circuit 30, and is used to supply power to the pump module 10, the controller 20 and the drive circuit 30. 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, and the controller 20 can transmit signals with external devices through the charging interface 80.

[0134] The receiving shell 90 a is provided with a charging opening 92 , and the charging opening 92 is arranged corresponding to the charging interface 80 to expose the charging interface 80 , so as to facilitate the charging interface 80 to be connected to an external power source or an 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 receiving shell 90a to display information toward 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 under the control of the controller 20, such as time, inflation pressure, power supply, blood pressure measurement results, etc.

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

[0137] In the embodiment of the present application, the main body 100 may also include a sensor component for detecting at least one of heart rate, blood oxygen, sleep duration, number of steps, and acceleration. It is understandable that in some embodiments, the main body 100 may also include more or less components than the above, and the embodiment of the present application is not strictly limited to this.

[0138] Please refer to FIG. 3A to FIG. 4 , Figure 4 yes Figure 3A The connection schematic block diagram of the main body 100 in the wearable device 1000 in some embodiments is shown, wherein the dotted line represents the electrical connection, and the solid line represents the structural connection.

[0139] In some embodiments, the pump module 10 may include a plurality of piezoelectric pumps, for example Figure 4In the embodiment, the multiple piezoelectric pumps include a first piezoelectric pump 2 and a second piezoelectric pump 3. The vents of the multiple piezoelectric pumps are all connected to the vent opening 121 of the pump module 10. The gases of the multiple piezoelectric pumps flow out through their respective vents and converge at the vent opening 121 of the pump module 10, and are inflated to the outside through the vent opening 121 of the pump module 10. The exhaust of multiple piezoelectric pumps together increases the gas output of the pump module 10, and a large flow rate of the pump module 10 is achieved.

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

[0141] In this embodiment, multiple piezoelectric pumps are designed, also called multi-piezoelectric pump cascades. By setting up multiple piezoelectric pump cascades, air can be inflated at the same time, so that the flow rate of the pump module 10 is significantly increased, and a large flow rate requirement can be met, such as the flow rate requirement of an upper arm blood pressure monitor. Since the piezoelectric pump itself has the characteristic of being silent, the pump module 10 provided in this embodiment can achieve a large flow rate, silence and no vibration.

[0142] It should be noted that Figure 4 In the figure, the pump module 10 may include two piezoelectric pumps, and the number of drive circuits 30 is two for illustration. 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 illustrate that multiple drive circuits 30 are arranged in parallel and receive the same control signal from the controller 20, and the drive circuits 30 are electrically connected to the piezoelectric pumps one by one.

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

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

[0145] In some embodiments, the pump module 10 includes an integrated seat 1 and a first piezoelectric pump 2 and a second piezoelectric pump 3 arranged on opposite sides of the integrated seat 1. By stacking the first piezoelectric pump 2, the integrated seat 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 of the pump module 10.

[0146] Exemplarily, the number of the first piezoelectric pumps 2 is one or more, and the number of the second piezoelectric pumps 3 is one or more. Figure 5A and Figure 5B The number of the first piezoelectric pump 2 is one, and the number of the second piezoelectric pump 3 is two for illustration. It should be noted that the first piezoelectric pump 2 and the second piezoelectric pump 3 can adopt the same pump structure, and the assembly method of the first piezoelectric pump 2 and the integrated seat 1 can also be the same as the assembly method of the second piezoelectric pump 3 and the integrated seat 1, which is beneficial to improve the consistency of the air outlet of the first piezoelectric pump 2 and the second piezoelectric pump 3, and is beneficial to improve the stability of the integration of the first piezoelectric pump 2 and the integrated seat 1. The difference between the first piezoelectric pump 2 and the second piezoelectric pump 3 is that they are located on different sides of the integrated seat 1. In the following description, the relevant scheme of the first piezoelectric pump 2 is described more completely, and the relevant scheme of the second piezoelectric pump 3 is partially described. Another part of the relevant scheme of the second piezoelectric pump 3 can refer to the corresponding content of the first piezoelectric pump 2, and the embodiment of the present application will not be repeated.

[0147] Please refer to Figure 6 to Figure 7 , Figure 6 yes Figure 5A The three-dimensional exploded schematic diagram of the pump module 10 is shown; Figure 7 yes Figure 6 The structure diagram of the integrated seat 1 shown in another viewing angle.

[0148] In some embodiments, the integrated seat 1 may include a seat body 11 and a vent nozzle 12. The seat 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 is provided with a first air delivery port 1111, and the second mounting surface 112 is provided with a second air delivery port 1121. The vent nozzle 12 is fixed to the seat body 11 and is located on the side of the first mounting surface 111 facing away from the second mounting surface 112. The first air delivery port 1111 and the second air delivery port 1121 are both connected to the vent nozzle 12. The first air delivery port 1111 may extend from the first mounting surface 111 to the interior of the seat body 11, and be connected to the internal channel of the seat body 11 to be connected to the vent nozzle 12. The second air delivery port 1121 may extend from the second mounting surface 112 to the interior of the seat body 11, and be connected to the internal channel of the seat body 11 to be connected to the vent nozzle 12.

[0149] Exemplarily, the first piezoelectric pump 2 is fixed to the first mounting surface 111, and the second piezoelectric pump 3 is fixed to the second mounting surface 112. The first piezoelectric pump 2 is connected to the first air supply port 1111, and the second piezoelectric pump 3 is connected to the second air supply port 1121. The first piezoelectric pump 2 includes an air vent, and the air vent of the first piezoelectric pump 2 is connected to the first air supply port 1111. The second piezoelectric pump 3 includes an air vent 31, and the air vent 31 of the second piezoelectric pump 3 is connected to the second air supply port 1121.

[0150] Among them, the gas generated by the first piezoelectric pump 2 flows to the ventilation nozzle 12 through the first gas supply port 1111, and the gas generated by the second piezoelectric pump 3 flows to the ventilation nozzle 12 through the second gas supply port 1121, so that the gas generated by the first piezoelectric pump 2 and the gas generated by the second piezoelectric pump 3 converge at the ventilation nozzle 12, thereby increasing the overall gas output of the pump module 10.

[0151] Exemplarily, the vent of the first piezoelectric pump 2 is located at the center of the surface of the first piezoelectric pump 2 facing the seat body 11, so as to facilitate the exhaust of the first piezoelectric pump 2; or, the vent of the first piezoelectric pump 2 is located at a non-center of the surface of the first piezoelectric pump 2 facing the seat body 11, so as to be adaptively adjusted according to the installation position of the first piezoelectric pump 2, the design of the air path channel inside the seat body 11, etc., so as to meet the normal exhaust of the first piezoelectric pump 2 and transmit it to the vent nozzle 12 through the seat body 11. Among them, the vent 31 of the second piezoelectric pump 3 is set with reference to the vent of the first piezoelectric pump 2.

[0152] Exemplarily, the number of first piezoelectric pumps 2 is less than or equal to the number of second piezoelectric pumps 3, so that the seat body 11 has a relatively sufficient and flexible arrangement space on the side of its first mounting surface 111 facing away from the second mounting surface 112 for arranging the ventilation nozzle 12, thereby improving the space utilization of the pump module 10 and improving the integration of the pump module 10, which is beneficial to the miniaturization of the pump module 10 on the basis of achieving a large flow rate.

[0153] Exemplarily, the orthographic projections of all the first piezoelectric pumps 2 on the second mounting surface 112 fall 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 seat body 11 in the XY plane, thereby improving the space utilization of the seat body 11. 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 outermost edges of all the second piezoelectric pumps 3 connected in sequence on the second mounting surface 112.

[0154] For example, the number of the first piezoelectric pump 2 is one, and the number of the second piezoelectric pumps 3 is two. The orthographic projection of the first piezoelectric pump 2 on the second mounting surface 112 falls within 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 body 11 in the XY plane, thereby improving the space utilization of the seat body 11.

[0155] In some embodiments, the first piezoelectric pump 2 has an air leakage port 2132e, and the air leakage port 2132e is connected to the air vent of the first piezoelectric pump 2 to connect to the first air delivery port 1111. The integrated seat 1 may also include a limit platform 116, which is fixed to the seat body 11 and protrudes relative to the first mounting surface 111. The limit platform 116 is arranged on the peripheral side of the first piezoelectric pump 2, and the limit platform 116 is provided with an avoidance groove 1161, and the avoidance groove 1161 avoids the setting of the air leakage port 2132e.

[0156] Exemplarily, there may be two limit platforms 116, and the two limit platforms 116 are disposed on opposite sides of the first piezoelectric pump 2 to achieve the limited installation of the first piezoelectric pump 2. One of the limit platforms 116 is provided with an avoidance groove 1161, and the air leakage port 2132e of the first piezoelectric pump 2 is located in the avoidance groove 1161 to achieve avoidance of the air leakage port 2132e.

[0157] Exemplarily, the number of the limiting platforms 116 may be more than three, and more than three limiting platforms 116 are arranged around the first piezoelectric pump 2 to achieve the limited installation of the first piezoelectric pump 2. Among them, one limiting platform 116 is provided with an avoidance groove 1161, and the air leakage port 2132e of the first piezoelectric pump 2 is located in the avoidance groove 1161 to achieve avoidance of the air leakage port 2132e.

[0158] It should be noted that when there are multiple air vents 2132e, multiple avoidance grooves 1161 are correspondingly set on multiple limit platforms 116, or multiple avoidance grooves 1161 are set on one limit platform 116, so that one avoidance groove 1161 is set corresponding to one air vent 2132e, so as to achieve avoidance of the air 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 achieve limited installation of the second piezoelectric pump 3 , and a corresponding avoidance groove 1161 for the air discharge port of the second piezoelectric pump 3 is provided.

[0160] Please refer to FIG. 8A to FIG. 9B , Fig. 8A yes Figure 6 The three-dimensional exploded schematic diagram of the integrated seat 1 is shown; Figure 8B yes Fig. 8A The structure diagram of the integrated seat 1 shown in another viewing angle; Fig. 9A yes Figure 6 The structure schematic diagram of the integrated seat 1 cut along the AA line; Fig. 9B yes Figure 6 The schematic diagram of the structure of the integrated seat 1 cut along the BB line is shown in the figure. The coordinate system in the figure is illustrated with the width direction of the integrated seat 1 as the X direction, the length direction of the integrated seat 1 as the Y direction, and the thickness direction of the integrated seat 1 as the Z direction.

[0161] In some embodiments, the base body 11 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 connects the first air delivery port 1111 with the vent nozzle 12 , and the second air passage 114 connects the second air delivery port 1121 with the vent nozzle 12 .

[0162] Exemplarily, the number of the first piezoelectric pumps may be multiple, the number of the first gas delivery ports 1111 and the first air channels 113 is the same as the number of the first piezoelectric pumps, and one first piezoelectric pump corresponds to one first gas delivery port 1111 and one first air channel 113. Alternatively, the number of the second piezoelectric pumps may be multiple, the number of the second gas delivery ports 1121 and the second air channels 114 is the same as the number of the second piezoelectric pumps, and one second piezoelectric pump corresponds to one second gas delivery port 1121 and one second air channel 114. In this embodiment, by providing multiple first piezoelectric pumps and / or providing multiple second piezoelectric pumps, the gas 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 body 11 may include a first seat 11a and a second seat 11b that are sealed and connected. The first seat 11a has a first mounting surface 111, and the first seat 11a has a first strip groove 113a, a second strip groove 114a, and a first confluence groove 115a facing the second seat 11b. One end of the first strip groove 113a is connected to the first gas delivery port 1111, and the other end of the first strip groove 113a is connected to the first confluence groove 115a. One end of the second strip groove 114a is connected to the first confluence groove 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 gas delivery port 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 channel 113. The second strip groove 114a and the fourth strip groove 114b cooperate to form the second air channel 114. The first confluence groove 115a and the second confluence groove 115b cooperate to form the confluence channel 115, and the confluence channel 115 is connected to the vent 12.

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

[0165] It can be understood that the length, shape and extension path of the first air channel 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 air channel 114 are consistent with the second strip groove 114a and the fourth strip groove 114b. In addition, the relative position relationship between the first air channel 113 and the second air channel 114 is consistent with the relative position relationship between the first strip groove 113a and the second strip groove 114a, and is consistent with the relative position relationship between the third strip groove 113b and the fourth strip groove 114b.

[0166] The subsequent description of the length, shape and extension path of the first air channel 113 may refer to the drawings of the first strip groove 113a and the third strip groove 113b; the description of the length, shape and extension path of the second air channel 114 may refer to the drawings of the second strip groove 114a and the fourth strip groove 114b; the description of the relative positional relationship between the first air channel 113 and the second air channel 114 may refer to the relative positional relationship between the first strip groove 113a and the second strip groove 114a, or refer to the relative positional relationship between the third strip groove 113b and the fourth strip groove 114b.

[0167] One end of the first air channel 113 is connected to the confluence channel 115, and one end of the second air channel 114 is connected to the confluence channel 115, so that the gas entering the first air channel 113 from the first air delivery port 1111 can converge with the gas entering the second air channel 114 from the second air delivery port 1121 at the confluence channel 115 and then flow out from the vent nozzle 12. By converging the gas in the first air channel 113 and the gas in the second air channel 114 and then flowing out, the gas output of the pump module can be increased.

[0168] Among them, the first gas delivery port 1111 and the second gas delivery port 1121 are arranged alternately, and the portion of the first gas channel 113 between the first gas delivery port 1111 and the confluence channel 115 is separated from the portion of the second gas channel 114 between the second gas delivery port 1121 and the confluence channel 115. In this embodiment, by separating the first gas channel 113 and the second gas channel 114 outside the confluence channel 115, it is possible to avoid the gas in the first gas channel 113 and the gas in the second gas channel 114 from intersecting before entering the confluence channel 115, thereby reducing the flow resistance of the gas before entering the confluence channel 115, and avoiding the gas in the first gas channel 113 and the gas in the second gas channel 114 from generating vortex and turbulence before entering the confluence channel 115, which is beneficial to the stable gas outlet of the pump module.

[0169] In some embodiments, the ratio of the length of the first air channel 113 to the length of the second air channel 114 is in the range of 0.9 to 1.1, for example, the length of the first air channel 113 can be equal to the length of the second air channel 114. In this embodiment, by setting the length of the gas transmission path in the first air channel 113 to be equal to or the difference between the length of the gas transmission path in the second air channel 114 is small, the flow resistance encountered by the gas in the first air channel 113 and the flow resistance encountered by the gas in the second air channel 114 are small, and the air pressure of the gas transmitted to the confluence channel 115 through the first air channel 113 and the air pressure of the gas transmitted to the confluence channel 115 through the second air channel 114 are small, thereby improving the gas outlet stability of the pump module.

[0170] For example, the ratio of the length of the first air channel 113 to the length of the second air channel 114 may 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 air channel 113 may be represented by the length of the center line of the first strip groove 113a, and the length of the second air channel 114 may be represented by the length of the center line of the second strip groove 114a.

[0171] In some embodiments, the first air channel 113 may include a first portion and a second portion that are connected. The cross-sectional area of ​​the first portion remains unchanged, the cross-sectional area of ​​the second portion is different from the cross-sectional area of ​​the first portion, and the ratio of the length of the second portion to the length of the first air channel 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 first air channel 113 has fewer variable cross-sectional portions, thereby avoiding excessive flow resistance of gas transmission in the first air channel 113, reducing air pressure loss, and facilitating the improvement of the stability of the gas outlet of the pump module.

[0172] For example, the first part can be a continuous whole or a plurality of parts arranged at intervals. The second part can be a continuous whole or a plurality of parts arranged at intervals, and the cross-sectional areas of the second part are the same or different. The arrangement positions of the first part and the second part as a whole or in part can be flexibly set.

[0173] The ratio of the length of the second portion to the length of the first air channel 113 may 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 air channel 114 may include a third portion and a fourth portion that are connected, the cross-sectional area of ​​the third portion remains unchanged, the cross-sectional area of ​​the fourth portion is different from the cross-sectional area of ​​the third portion, and the ratio of the length of the fourth portion to the length of the second air channel 114 is less than or equal to 0.1.

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

[0176] The ratio of the cross-sectional area of ​​the third portion to the cross-sectional area of ​​the first portion may 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 channel 113 and the length of the second air channel 114 is less than or equal to 2 mm. In this embodiment, by setting the difference between the length of the first air channel 113 and the length of the second air channel 114, the length of the gas transmission path in the first air channel 113 and the length of the gas transmission path in the second air channel 114 can be made to have a small deviation, so that the flow resistance encountered by the gas in the first air channel 113 and the flow resistance encountered by the gas in the second air channel 114 are small, and then the air pressure of the gas transmitted to the confluence channel 115 through the first air channel 113 and the air pressure of the gas transmitted to the confluence channel 115 through the second air channel 114 are small, thereby improving the gas outlet stability of the pump module.

[0178] Exemplarily, the absolute value of the difference between the length of the first air channel 113 and the length of the second air channel 114 is 2 mm, or 1.5 mm, or 1 mm, or 0.5 mm, or 0 mm, or other values ​​less than 2 mm.

[0179] In some other embodiments, the height of the first air channel 113 in the thickness direction of the seat body 11 (see Fig. 9A H1 in FIG. 1 is in the range of 0.2 mm to 0.5 mm, and the width of the first air channel 113 (see Fig. 9A W1) is in the range of 1mm to 2mm. In this embodiment, by setting the height and width of the first air channel 113, it is possible to reduce the space occupied by the first air channel 113 in the thickness direction of the seat body 11 while ensuring the size of the cross-sectional area of ​​the first air channel 113 to prevent excessive flow resistance, which is beneficial to the lightweight design of the seat body 11, thereby helping to reduce the thickness of the pump module. Among them, the thickness direction of the seat body 11 is the Z direction, and the width direction of the first air channel 113 is perpendicular to the extension direction of the first air channel 113 and perpendicular to the thickness direction of the seat body 11.

[0180] Exemplarily, the height of the first air channel 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 channel 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 0.2 mm to 0.5 mm, and the width of the second air passage 114 is in the range of 1 mm to 2 mm.

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

[0183] In the present embodiment, by setting the difference between the length of the first air channel 113 and the length of the second air channel 114, the deviation between the length of the gas transmission path in the first air channel 113 and the length of the gas transmission path in the second air channel 114 can be small, so that the flow resistance encountered by the gas during transmission in the first air channel 113 and the flow resistance encountered by the gas during transmission in the second air channel 114 are small, and further, the air pressure of the gas transmitted to the confluence channel 115 through the first air channel 113 and the air pressure of the gas transmitted to the confluence channel 115 through the second air channel 114 are small, thereby improving the gas outlet stability of the pump module.

[0184] In the present embodiment, by setting the height and width of the first air duct 113, it is possible to ensure the size of the cross-sectional area of ​​the first air duct 113 and the second air duct 114 to prevent excessive flow resistance while reducing the space occupied by the first air duct 113 and the second air duct 114 in the thickness direction of the seat body 11, which is beneficial to the lightweight design of the seat body 11, thereby facilitating reducing the thickness of the pump module.

[0185] In the embodiment of the present application, the composition of the extension path of the first air duct 113 may include the following implementations. It can be understood that the extension path of the second air duct 114 may adopt any one of the following implementations, which is schematically illustrated using the first air duct 113.

[0186] In some embodiments, the extension path of the first air channel 113 may include at least two straight segments and at least one curved segment, and two adjacent straight segments are smoothly connected by the curved segment. In this embodiment, the two adjacent straight segments are smoothly connected by the curved segment, so that the two adjacent straight segments can be smoothly connected without right angles, which reduces the flow resistance of the gas in the first air channel 113 during the process of being transmitted from one straight segment to another adjacent straight segment, thereby reducing the flow loss of the gas due to the change of transmission direction in the first air channel 113, and increasing the gas pressure when the gas is transmitted to the confluence channel 115 through the first air channel 113, which is conducive to the stable gas outlet of the pump module.

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

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

[0189] Among them, by setting the curved segment, the flexibility of setting the first air channel 113 can be improved, so that the distribution of the first air channel 113 in the integrated seat 1 can be reasonably designed according to the actual situation. For example, by setting the curved segment, the first air channel 113 and the second air channel 114 are reasonably bent, which is conducive to the ratio of the length of the first air channel 113 to the length of the second air channel 114 being in the range of 0.9 to 1.1. For another example, by setting the curved segment, the first air channel 113 and the second air channel 114 are evenly distributed in the integrated seat to improve the structural stability of the integrated seat.

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

[0191] In some other embodiments, the extension path of the first air channel 113 is in the shape of a spline curve, so that the first air channel 113 is a smooth curve at all places, and the first air channel 113 and the first gas delivery port 1111, the first air channel 113 and the confluence channel 115 are all smoothly connected. In this embodiment, the spline curve design can make the flow resistance of the gas in the first air channel 113 small, and the gas flows from the first gas delivery port 1111 into the first air channel 113 and the air pressure loss when the transmission direction is changed is small, and the gas flows from the first air channel 113 into the confluence channel 115 and the air pressure loss when the transmission direction is changed is small, which is conducive to improving the gas outlet effect of the pump module.

[0192] Among them, the spline curve is a smooth curve, and the arc is a special curve in the spline curve. Therefore, if at least a part of the extension path of the first airway 113 is arc-shaped, it also falls within the protection scope of the embodiment of the present application.

[0193] In some other embodiments, the extension path of the first air channel 113 is a straight line segment, so that one end of the first air channel 113 is connected to the first gas delivery port 1111 in a straight line, and the other end of the first air channel 113 is connected to the confluence channel 115 in a straight line. The first air channel 113 designed with a straight line segment can reduce the change in the transmission direction of the gas during the transmission from the first gas delivery port 1111 to the first air channel 113 and then from the first air channel 113 to the confluence channel 115, thereby reducing the flow resistance of the gas during the transmission process and improving the gas outlet effect of the pump module.

[0194] Indicatively, Figure 8B The first seat 11a has one first strip groove 113a and two second strip grooves 114a.

[0195] Among them, for the extension direction of the first strip groove 113a, the extension path of the first strip groove 113a extends from the first gas delivery port 1111 toward the -X direction and toward the Y direction in a curve, then extends in a straight line along the Y direction, then extends in a curve toward the Y direction and toward the X direction, then extends in a straight line along the X direction, then extends in a curve toward the X direction and toward the -Y direction, then extends in a straight line along the -Y direction, then extends in a curve toward the -Y direction and toward the X direction and connects to the first confluence groove 115a.

[0196] Among them, for the second strip groove 114a corresponding to the second gas delivery port 1121 located on the -Y direction side of the first gas delivery port 1111, the extension path of the second strip groove 114a extends straightly along the Y direction from the part of the second gas delivery port 1121 corresponding to the first seat 11a, then extends in a curve toward the Y direction and toward the -X direction, then extends straightly along the -X direction, then extends in a curve toward the -X direction and toward the -Y direction, then extends straightly along the -Y direction, then extends in a curve toward the -Y direction and toward the X direction, then extends straightly along the X direction, then extends in a curve toward the X direction and toward the Y direction and connects to the first confluence groove 115a.

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

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

[0199] Exemplarily, the glue dispensing groove 117 is arranged around the third strip groove 113b and the fourth strip groove 114b, which is conducive to sealing the first air channel 113 and the second air channel 114. The glue dispensing groove 117 is arranged around the entire outer circumference of the third strip groove 113b and the fourth strip groove 114b, or the glue dispensing groove 117 is arranged in the interval area between the third strip groove 113b and the fourth strip groove 114b, or part of the glue dispensing groove 117 is arranged around the entire outer circumference of the third strip groove 113b and the fourth strip groove 114b, and the other part is arranged in the interval area between the third strip groove 113b and the fourth strip groove 114b.

[0200] In some embodiments, the second seat 11b further has a column 118, one end of which is fixedly connected to the bottom wall of the glue dispensing groove 117, and the other end of the column 118 is attached to the surface of the first seat 11a facing the second seat 11b, and the column 118 is arranged in the area surrounded by the first strip groove 113a, the area surrounded 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 can avoid the area of ​​the glue dispensing groove 117 being too large, which is conducive to the uniform arrangement of the glue and improves the bonding and sealing effect of the first seat 11a and the second seat 11b.

[0201] In some other embodiments, the first seat 11a has a glue dispensing groove 117, which is separated from the first strip groove 113a and the second strip groove 114a. The glue dispensing groove 117 is used to set 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, thereby improving the sealing performance of the integrated seat. In addition, the second seat 11b can also be provided with a column 118, and the setting method is the same as the implementation method of the first seat 11a having the glue dispensing groove 117 and the column 118.

[0202] In some other embodiments, the seat body 11 is an integrated structure. By setting the seat body 11 as an integrated structure, the air tightness and structural stability of the seat body 11 can be improved. Exemplarily, the seat body 11 can be prepared by injection molding or the like.

[0203] Please refer to FIG. 10A to FIG. 10C , Fig. 10A yes Figure 5A The pump module 10 shown is a partial structural schematic diagram cut along line CC in some embodiments; Fig. 10B yes Fig. 10A The pump module 10 shown is provided with a sealing ring 4; Fig. 10C yes Fig. 10A The pump module 10 shown is a schematic structural diagram of a vibration isolation layer 5 . FIG. 10A to FIG. 10C The matching connection between the first piezoelectric pump 2 and the first seat 11a is used as a schematic illustration. It can be understood that the matching connection between the second piezoelectric pump and the second seat can be any embodiment of the matching connection between the first piezoelectric pump 2 and the first seat 11a.

[0204] For some examples, see Fig. 10A, the vent 2141 of the first piezoelectric pump 2 is arranged opposite to the first gas delivery port 1111 of the first seat 11a, and the surface of the first piezoelectric pump 2 facing the first seat 11a is fixed to the first mounting surface 111. The vent 2141 of the first piezoelectric pump 2 may include a plurality of through holes arranged at intervals, and the plurality of through holes form a hole group, which can achieve a uniform wind effect and is conducive to uniform gas output from the first piezoelectric pump 2. Among them, the orthographic projection of the vent 2141 on the first mounting surface 111 may fall within the first gas delivery port 1111 to reduce the flow resistance of the gas flowing out of the first piezoelectric pump 2 through the vent 2141, which is conducive to better flow of gas into the first gas delivery port 1111. In some other embodiments, the vent 2141 may also be formed by a through hole.

[0205] For some examples, see Fig. 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 and connects the seat body 11 and the first piezoelectric pump 2, and the sealing ring 4 is arranged to seal around the first gas delivery port 1111. In this embodiment, the sealing ring 4 seals the first gas delivery port 1111 and the vent 2141, which can prevent gas from overflowing when the first piezoelectric pump 2 discharges gas to the first gas delivery port 1111, improves the air tightness of the junction between the vent 2141 and the first gas delivery port 1111, and improves the effect of the first piezoelectric pump 2 discharging gas to the first seat 11a.

[0206] Exemplarily, the outer peripheral side of the sealing ring 4 may be provided with a sealant 6, and the sealant 6 is fixedly connected to the first mounting surface 111 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 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. 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] For some examples, see Fig. 10CThe pump module 10 may further include a vibration isolation layer 5, which is abutted 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. In the present embodiment, by providing the vibration isolation layer 5, a buffer area is provided between the first piezoelectric pump 2 and the first seat 11a to reduce or even eliminate the vibration transmitted to the first seat 11a when the first piezoelectric pump 2 is working. Similarly, by providing the vibration isolation layer 5 between the second piezoelectric pump and the second seat, the vibration transmitted to the second seat when the second piezoelectric pump is working can also be reduced or even eliminated, thereby reducing or even eliminating the interference of the mutual vibration between the first piezoelectric pump 2 and the second piezoelectric pump when working, thereby improving the consistency of the work of the first piezoelectric pump 2 and the second piezoelectric pump, and improving the gas outlet stability of the pump module 10. In addition, in the present embodiment, by providing the vibration isolation layer 5, the noise of the first piezoelectric pump 2 during operation can also be reduced, which is conducive to further silencing the pump module 10 and improving the user experience.

[0208] Exemplarily, the vibration isolation layer 5 may be an integral layer or a plurality of parts arranged at intervals. The vibration isolation layer 5 may be, but is not limited to, foam, gel-like materials, etc. For example, the thickness of the vibration isolation layer 5 is less than 1 mm, for example, the thickness of the vibration isolation layer 5 may be, but is not limited to, 0.9 mm, or 0.8 mm, or 0.7 mm, or 0.6 mm, or 0.5 mm, or other values ​​less than 1 mm.

[0209] In some embodiments, the sealing ring 4 can be arranged between the first mounting surface 111 and the first piezoelectric pump 2, and the sealing ring 4 is arranged around the first air delivery port 1111 to improve the air tightness at the junction of the vent 2141 and the first air delivery port 1111. A sealant 6 is provided on the outer peripheral side of the sealing ring 4, and the sealant 6 is fixedly connected to the first mounting surface 111 and the surface of the first piezoelectric pump 2 facing the first seat 11a to improve the sealing effect between the first piezoelectric pump 2 and the first seat 11a. The vibration isolation layer 5 is abutted between the first mounting surface 111 and the first piezoelectric pump 2, and the vibration isolation layer 5 is arranged on the outer peripheral side of the sealant 6 to reduce the thickness of the pump module 10, which is conducive to the thin and light design of the pump module 10. Among them, the vibration isolation layer 5 abuts between the first mounting surface 111 and the first piezoelectric pump 2 means that the surface on one side of the vibration isolation layer 5 is attached to the first mounting surface 111, and the surface on 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.

[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 is disposed around the first air delivery port 1111 to improve the air tightness at the junction of the vent 2141 and the first air delivery port 1111. A sealant 6 is disposed on the outer peripheral side of the sealing ring 4, and the sealant 6 is fixedly connected to the vibration isolation layer 5 and the surface of the first piezoelectric pump 2 facing the first seat 11a to improve the sealing effect between the first piezoelectric pump 2 and the first seat 11a.

[0211] Please refer to Fig.11A and Fig. 11B , Fig.11A yes Figure 5A The pump module 10 shown is a partial structural schematic diagram cut along line CC in some other embodiments; Fig. 11B yes Fig.11A The pump module 10 shown is a schematic structural diagram of a vibration isolation layer 5 . FIG. 11A to FIG. 11B The matching connection between the first piezoelectric pump 2 and the first seat 11a is used as a schematic illustration. It can be understood that the matching connection between the second piezoelectric pump and the second seat can be any embodiment of the matching connection between the first piezoelectric pump 2 and the first seat 11a. Fig.11A , Fig. 11B The pump module 10 of the illustrated embodiment may include Fig.11A , Fig. 11B Most of the technical features of the pump module 10 of the illustrated embodiment are described below mainly in terms of the differences between the two, and most of the same contents between the two will not be repeated.

[0212] In some embodiments, the seat body 11 is provided with a mounting groove 1112. The opening of the mounting groove 1112 is located at the first mounting surface 111, and the mounting groove 1112 is arranged around the first gas delivery port 1111. The pump module 10 may further include a sealing ring 4, which is arranged in the mounting groove 1112 and around the first gas delivery port 1111. The sealing ring 4 seals and connects the first seat 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 of the first seat 11a and the first piezoelectric pump 2 after being fixedly connected, thereby reducing the overall thickness of the pump module 10, which is conducive to the thin and light design of the pump module 10. The sealing ring 4 seals the first air delivery port 1111 and the vent 2141, which can prevent the gas from overflowing when the first piezoelectric pump 2 discharges gas to the first air delivery port 1111, improves the air tightness of the joint between the vent 2141 and the first air delivery port 1111, and improves the effect of the first piezoelectric pump 2 discharging gas to the first seat 11a.

[0214] Exemplarily, a sealant 6 is provided on the outer peripheral side of the sealing ring 4, and 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 first piezoelectric pump 2 and the first seat 11a, thereby improving the sealing effect of 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 in the mounting groove 1112 and abuts against the bottom of the mounting groove 1112 and the first piezoelectric pump 2, and the vibration isolation layer 5 is a flexible material or an elastic material. By providing the vibration isolation layer 5, a buffer area is provided between the first piezoelectric pump 2 and the first seat 11a, which can reduce the noise of the first piezoelectric pump 2 when it is working, which is conducive to further silencing the pump module 10 and improving the user experience.

[0216] Exemplarily, the vibration isolation layer 5 can be an integral layer or a plurality of parts arranged at intervals. The sealing ring 4 is arranged in the mounting groove 1112 and between the bottom of the mounting groove 1112 and the first piezoelectric pump 2, and the sealing ring 4 is arranged around the first air supply port 1111 to improve the air tightness at the junction of the vent 2141 and the first air supply port 1111. A sealant 6 is provided on the outer peripheral side of the sealing ring 4, and 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 to improve the sealing effect between the first piezoelectric pump 2 and the first seat 11a. The vibration isolation layer 5 abuts between the bottom of the mounting groove 1112 and the first piezoelectric pump 2, and the vibration isolation layer 5 is arranged on the outer peripheral side of the sealant 6 to reduce the thickness of the pump module 10, which is conducive to the lightweight design of the pump module 10. Among them, the vibration isolation layer 5 abuts between the bottom of the installation groove 1112 and the first piezoelectric pump 2, which means that the surface of one side of the vibration isolation layer 5 is attached to the bottom of the installation groove 1112, and the surface of 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 Figure 4 , Fig. 12A and Fig. 12B , Fig. 12A yes Figure 4 The schematic diagram of the pressure increase of the gas in the air bag 200a when the pump module 10 is working; Fig. 12B yes Figure 4 The schematic diagram shows the change in the slope of the pressure increase of the gas in the airbag 200a when the pump module 10 is working.

[0218] In some embodiments, the air pressure sensor 40 is used to detect the current air pressure value of the gas in the airbag 200a when the pump module 10 is working and transmit it to the controller 20, and 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 the airbag 200a when working, and can also deflate the airbag 200a.

[0219] In this embodiment, the controller 20 adjusts the duty cycle of the control signal so that the current air pressure value changes linearly with time, and the linear slope of the current air pressure value changes 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] Exemplarily, 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 0.3kHz, 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 0.3kHz. 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 0.6kHz, 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 conducive to improving the consistency of the gas outlet of the first piezoelectric pump 2 and the second piezoelectric pump 3, thereby improving the gas outlet stability of the pump module 10.

[0221] Exemplarily, 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 0.2kHz, 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 0.2kHz. 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 0.4kHz, 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 conducive to improving the consistency of the gas outlet of all the first piezoelectric pumps 2, thereby improving the gas outlet stability of the pump module 10.

[0222] The oscillation frequency of the first piezoelectric pump 2 is the optimal operating frequency of the first piezoelectric pump 2, and the oscillation frequency of the second piezoelectric pump 3 is the optimal operating frequency of the second piezoelectric pump 3. In this embodiment, setting the frequency of the control signal close to the optimal operating frequencies of the first piezoelectric pump 2 and the second piezoelectric pump 3 can improve the consistency of the gas outlet between the first piezoelectric pump 2 and the second piezoelectric pump 3, thereby facilitating the linear increase of the gas pressure of the gas outlet of the pump module 10 to the required pressure value.

[0223] For example, the oscillation frequency of the first piezoelectric pump 2 and the second piezoelectric pump 3 is within the range of 23.8kHz±0.2kHz~0.3kHz. For example, the oscillation frequency 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 some 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 pressure increase change of the current air pressure value over time changes in a preset regularity. For example, the preset regularity changes in a quadratic function, a power function, a logarithmic function, etc., as long as the preset regularity changes are conducive to the detection of physiological parameters.

[0225] Please refer to Fig.13 and Fig.14 , Fig.13 yes Figure 2The schematic diagram of the structure of the gas path adapter 50 in the main body 100 in some embodiments; Fig.14 yes Figure 1 The diagram shows a partial cross-sectional structure of the main body 100 at the air path adapter 50 in the wearable device 1000.

[0226] In some embodiments, the main body 100 may further include an air circuit adapter 50, which is used to connect the vent nozzle 12 and the vent interface 91 to transmit the gas generated by the pump module 10 to the airbag to inflate the airbag. The air pressure sensor 40 is connected to the channel in the air circuit adapter 50 so that the air pressure sensor 40 can detect the current air pressure value of the pump module 10 inflating the airbag.

[0227] Exemplarily, the channel in the gas circuit adapter 50 has a first end 501 and a second end 502 that are spaced apart. The first end 501 is connected to the vent nozzle 12. The second end 502 may include a first side 5021 and a second side 5022 that are disposed opposite to each other, the first side 5021 being connected to the air bag, and the second side 5022 being connected to the air pressure sensor 40. In this embodiment, by providing the gas circuit adapter 50, not only can a gas channel be formed between the pump module 10 and the air bag, so that the relative position relationship between the pump module 10 and the air bag can be set more flexibly, but also a buffer space is provided for the air flow through the gas channel for setting the air pressure sensor 40, and the air pressure sensor 40 is arranged at the second end 502. By arranging the air pressure sensor 40 and the vent nozzle 12 at two ends of the gas circuit adapter 50 that are spaced apart, it is possible to prevent the gas flowing out of the vent nozzle 12 from quickly colliding with the air pressure sensor 40, thereby preventing the gas flowing out of the vent nozzle 12 from flowing too fast and damaging the air pressure sensor 40.

[0228] The gas path adapter 50 is designed with a curved structure between the first end 501 and the second end 502, so that the channel in the gas path adapter 50 is smoothly connected in a curved shape between the first end 501 and the second end 502. The structure of the smooth curved connection can make the area between the first end 501 and the second end 502 play a buffering role, so as to prevent the gas from flowing straight to the air pressure sensor 40 after flowing out of the vent nozzle 12, and can prevent the gas from flowing out of the vent nozzle 12 from flowing too fast and damaging the air pressure sensor 40, and prevent the gas from flowing out of the vent nozzle 12 from flowing too fast and generating eddy currents and turbulence, which is beneficial to the accuracy of the air pressure measurement by the air pressure sensor 40.

[0229] Please refer to Figures 14 to 15B , Fig.15A yes Fig.13 The exploded perspective view of the gas path adapter 50 is shown; Fig. 15B yes Fig.15A The diagram shown is a schematic diagram of the gas path adapter 50 from another viewing angle.

[0230] In some embodiments, the second side 5022 is provided with a detection air channel 5023 , the detection air channel 5023 has at least one bending path, and the detection air channel 5023 connects the channel in the air path adapter 50 and 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, wherein the first adapter portion 50a is fixedly connected to the second adapter portion 50b, and a detection gas groove 5023a is provided on the surface of the second adapter portion 50b facing the first adapter portion 50a, wherein the detection gas groove 5023a has a first opening 5023b and a second opening 5023c arranged opposite to each other, wherein the first opening 5023b is used to receive the gas flowing out of the ventilating nozzle 12, and the second opening 5023c is connected to the air pressure sensor 40, and 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 the baffle 50c seals the opening of the detection gas groove 5023a facing the first adapter portion 50a to form a detection gas channel 5023.

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

[0233] The periphery of the first adapter portion 50a may be provided with a lug 503, and the gas circuit adapter 50 can be fixed in the receiving shell 90a through the lug 503, which is beneficial to the structural stability of the gas circuit adapter 50, thereby facilitating the detection of air pressure.

[0234] In some embodiments, the air path adapter 50 may further include a mounting seat 504 and a clamping block 505, wherein the mounting seat 504 is convexly disposed on a surface of the second adapter portion 50b away from the first adapter portion 50a, and the mounting seat 504 has a through hole to communicate with the second opening 5023c, and the clamping block 505 is fixed to the mounting seat 504. The clamping block 505 can realize a quick fixed connection between the air pressure sensor 40 and the mounting seat 504, thereby improving the connection efficiency of the air pressure sensor 40 and the installation stability of the air pressure sensor 40, which is conducive to improving the air pressure detection accuracy.

[0235] Next, the structure of the first piezoelectric pump 2 is introduced. 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 FIG. 16A to FIG. 17 , Fig.16A yes Figure 5A The schematic diagram of the structure of the first piezoelectric pump 2 in the pump module 10 shown in some embodiments; Fig. 16B yes Fig.16AThe structure diagram of the first piezoelectric pump 2 shown in another viewing angle; Fig.17 yes Fig. 16B A schematic exploded perspective view of the first piezoelectric pump 2 is shown.

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

[0238] In some embodiments, the first piezoelectric pump 2 may further include a packaging shell 24, which is fixedly connected to the front cavity 21, the piezoelectric vibrator 22 and the rear cavity 23. The packaging shell 24 can seal and fix the first piezoelectric pump 2, thereby improving the stability and airtightness of the overall structure of the first piezoelectric pump 2.

[0239] Exemplarily, the package shell 24 is annular, and has a first snap-in groove 241 and a second snap-in groove 242. The first snap-in groove 241 is provided on the inner side wall of the package shell 24, and the first snap-in groove 241 snaps into the rear cavity 23 to fix the rear cavity 23. The second snap-in groove 242 is provided on the end surface of one side of the package shell 24, and the second snap-in groove 242 snaps into the piezoelectric vibrator 22, and one side of the package shell 24 is provided with an opening to avoid the electrode in the piezoelectric vibrator 22. The end surface of the package shell 24 provided with the second snap-in groove 242 is attached to the front cavity 21 and is fixedly connected to the front cavity 21.

[0240] Please refer to Figures 17 to 18B , Fig.18A yes Fig.17 The schematic diagram of the structure of the front chamber 21 in the first piezoelectric pump 2 in some embodiments is shown; Fig.18B yes Fig.18A A three-dimensional exploded schematic diagram of the front chamber 21 is shown.

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

[0242] Exemplarily, the ventilation layer 214 is made of a hard material, such as stainless steel, copper, etc.

[0243] Exemplarily, the leakage channel layer 213 is made of a hard material, such as stainless steel, copper, etc. The leakage channel 2132 may be formed by etching on the leakage channel layer 213 .

[0244] Exemplarily, the air release membrane 212 is made of a soft material, such as a silicone membrane, a rubber membrane, etc. The air release membrane 212 can bend and deform when there is a pressure difference between the two sides of the air release membrane 212 .

[0245] Exemplarily, the base 211 is made of a hard material, such as stainless steel, copper, etc.

[0246] Among them, when the pump module 10 is inflated, the piezoelectric vibrator 22 in the first piezoelectric pump 2 vibrates and drives the gas to move from the rear cavity 23 toward the front cavity 21, and the gas enters the front cavity 21 through the air port 2111. The air pressure of the air leakage membrane 212 on the side of the base 211 is higher than the air pressure of the air leakage membrane 212 on the side of the air leakage channel layer 213. The gas pushes the air leakage membrane 212 to bend toward the direction of the air leakage channel 2132 layer 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 port 2141 are connected, and the gas can flow out to the seat body 11 through the air port 2141, and converge to the ventilation nozzle 12 through the first air delivery port 1111 and the first air channel 113 of the seat body 11 for external inflation.

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

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

[0249] Please refer to Fig.19A and Fig.19B , Fig.19A yes Fig.17 The schematic diagram of the structure of the front chamber 21 in the first piezoelectric pump 2 in other embodiments is shown; Fig.19B yes Fig.19A A three-dimensional exploded schematic diagram of the front chamber 21 is shown. Fig.19A , Fig.19B The first piezoelectric pump 2 of the illustrated embodiment may include Fig.18A , Fig.18B Most of the technical features of the front cavity 21 of the illustrated embodiment are mainly described below with the differences between the two, and most of the same contents between the two will not be repeated.

[0250] In some embodiments, the leakage channel layer 213 has at least two leakage channels 2132, and the at least two leakage channels 2132 are arranged on the peripheral side of the second through hole 2131 and are spaced apart from the second through hole 2131. The second through hole 2131 and the at least two leakage channels 2132 are connected and disconnected by the bending deformation of the leakage membrane 212. The at least two leakage channels 2132 can accelerate the leakage, achieve comfortable and safe measurement, and the design of the at least two leakage channels 2132 does not require additional space for the device, which is conducive to the miniaturization design of the first piezoelectric pump 2.

[0251] In addition, since the first piezoelectric pump 2 has at least two air leakage channels 2132, it can avoid the failure of air leakage when a single air leakage channel 2132 fails. In addition, the at least two air leakage channels 2132 do not need to be powered, and only need to cooperate with the flexible air leakage membrane 212 to realize the opening and closing of the air leakage function under the air pressure difference.

[0252] In some embodiments, the front cavity 21 may further include an adhesive layer 215, which is disposed between the air leakage membrane 212 and the air leakage flow channel layer 213 to bond the air leakage membrane 212 and the air leakage flow channel layer 213. The adhesive layer 215 has an avoidance hole 2151, and the avoidance hole 2151 is arranged to avoid the first through hole 2121, the second through hole 2131 and the air leakage channel 2132, so that the part of the air leakage membrane 212 that is not bonded to the air leakage flow channel layer 213 can be deformed under the drive of the gas.

[0253] Please refer to Figures 20 to 22A , Fig. 20 yes Fig.19A The schematic diagram of the structure of the base 211 in the front cavity 21 in some embodiments; Fig.21 yes Fig.19A The schematic diagram of the structure of the air release membrane 212 in the front cavity 21 in some embodiments is shown; Fig.22A yes Fig.19A The front cavity 21 shown is a schematic diagram of the partial structure cut along line DD in some embodiments.

[0254] In some embodiments, the base 211 may include a base 2112 and a first boss 2113, and specifically has a groove 2114 disposed toward the air release membrane 212. The first boss 2113 is protruded 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 air release membrane 212 may include a membrane body 2122 and a second boss 2123. The membrane body 2122 is located on a side of the base 211 away from the piezoelectric vibrator 22, and the membrane body 2122 blocks the groove 2114. The second boss 2123 is protruded from the surface of the membrane body 2122 facing the base 211. The second boss 2123 abuts against the first boss 2113. The first through hole 2121 penetrates the membrane body 2122 and the second boss 2123, and the opening of the first through hole 2121 close to the base 211 is blocked by the first boss 2113.

[0255] Among them, the first boss 2113 of the base 211 overlaps the second boss 2123 of the air leakage membrane 212 to separate the air port 2111 and the air vent 2141. The contact area between the base 211 and the air leakage membrane 212 is small. When the pump module is deflated, the gas on the side of the air leakage membrane 212 close to the air vent 2141 acts on the air leakage membrane 212, which can make the pressure of the mutual abutment between the air leakage membrane 212 and the base 211 larger, which has a better effect on separating the air port 2111 and the air vent 2141, and improves the stability during deflation. In addition, since the contact area between the base 211 and the air leakage membrane 212 is small, when the pump module is inflated, the gas on the side of the air leakage membrane 212 close to the air port 2111 can more easily drive the part of the air leakage membrane 212 close to the first boss 2113 to move toward the vent 2141, which is beneficial to the conduction between the air port 2111 and the vent 2141, thereby improving the inflation efficiency.

[0256] Please refer to FIG. 22A to FIG. 22C , Fig. 22B yes Fig.22A The schematic diagram of the structure of the front chamber 21 when it is inflated; Fig. 22C yes Fig.22A The schematic diagram of the structure of the front chamber 21 when it is deflated. Fig. 22B and Fig. 22C The dotted line with an arrow in the middle indicates the flow direction of the gas, and the arrow points from high pressure to low pressure.

[0257] In some embodiments, when the pump module is inflated, refer to Fig. 22B , the gas enters the groove 2114 through the gas port 2111 and pushes the gas leakage membrane 212 to bend toward the second through hole 2131. At this time, the second boss 2123 is out of contact with the first boss 2113 to connect the first through hole 2121 to the groove 2114, and the gas leakage membrane 212 is kept in contact with the gas leakage channel layer 213 to keep the vent 2141 and at least two gas leakage channels 2132 isolated. The gas flows out through the gas port 2111, the groove 2114, the first through hole 2121, the second through hole 2131 and the gas leakage channel layer 213 to be inflated.

[0258] When the pump module is deflated, refer to Fig. 22C , the gas flows into the second through hole 2131 through the vent 2141 and drives the gas leakage membrane 212 to bend toward the groove 2114, at which time the second boss 2123 abuts against the first boss 2113 to separate the gas port 2111 from the vent 2141, and the part of the gas leakage membrane 212 between the gas leakage channel 2132 and the second through hole 2131 is out of contact with the gas leakage channel layer 213, so that the vent 2141 is connected to the gas leakage channel 2132. The gas is discharged through the vent 2141, the second through hole 2131, and the gas leakage channel 2132 in sequence for gas leakage.

[0259] Next, the leakage channels 2132 of the leakage channel layer 213 are described. The number of the leakage channels 2132 is at least two, and the leakage channels 2132 are arranged on the peripheral side of the second through hole 2131, and the angle between the at least two leakage channels 2132 is an arbitrary angle. The drawings of the present application illustrate that the number of the leakage channels 2132 is two, and the two leakage channels 2132 are at an angle of 180°.

[0260] Please refer to Fig.19B , Fig.23A and Fig. 23B , Fig.23A yes Fig.19A The schematic diagram of the structure of the leakage channel layer 213 in the front cavity 21 in some embodiments is shown; Fig. 23B yes Fig.23AThe structure of the leakage channel layer 213 is shown as a schematic diagram cut along line EE.

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

[0262] Exemplarily, the air leakage port 2132 e is located on the side surface 2135 , which reduces the size of the air leakage channel layer 213 and is beneficial to the miniaturized design of the first piezoelectric pump 2 .

[0263] Exemplarily, the first air leakage groove 2132b is recessed in the first surface 2133, and the opening of the first air leakage groove 2132b facing the ventilation layer 214 can be fitted with the ventilation layer 214 through the air leakage channel layer 213 to achieve sealing. The side of the air leakage channel layer 213 facing away from the ventilation layer 214 at the first air leakage groove 2132b does not need to be sealed, thereby improving the air sealing of the air leakage channel 2132 and facilitating stable air leakage of the air leakage channel 2132.

[0264] Exemplarily, the flow cross-sectional area of ​​the first air leakage hole 2132a is larger than the flow cross-sectional area of ​​the first air leakage groove 2132b, so that when the first piezoelectric pump 2 is deflated, the gas can quickly enter the first air leakage hole 2132a and act as a buffer cache, and when the gas flows from the first air leakage hole 2132a with a larger flow cross-sectional area to the first air leakage groove 2132b with a smaller flow cross-sectional area, the flow speed of the gas can be increased, thereby increasing the deflation 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 air leakage hole 2132a is the cross-sectional area of ​​the first air leakage hole 2132a perpendicular to the center line of the first air leakage hole 2132a, and the flow cross-sectional area of ​​the first air leakage groove 2132b is the cross-sectional area of ​​the first air leakage groove 2132b perpendicular to the extension direction of the first air leakage groove 2132b.

[0266] Please refer to Fig.19B , Fig.24A and Fig. 24B , Fig.24A yes Fig.19AThe schematic diagram of the structure of the leakage flow channel layer 213 in the front cavity 21 in other embodiments is shown; Fig. 24B yes Fig.24A The structure diagram of the leakage channel layer 213 is shown cut along the FF line. Fig.24A , Fig. 24B The leakage channel layer 213 of the illustrated embodiment may include Fig.23A , Fig. 23B Most of the technical features of the leakage flow channel layer 213 of the illustrated embodiment are mainly described below with the differences between the two, and most of the same contents between the two will not be repeated.

[0267] In some embodiments, the first air release groove 2132 b is recessed in the second surface 2134 .

[0268] Exemplarily, the first air leakage groove 2132b is recessed in the second surface 2134, and the first air leakage groove 2132b has an opening facing the air leakage membrane 212. When the first piezoelectric pump 2 is deflated, the air leakage membrane 212 bends toward the base so that the first air leakage hole 2132a and the first air leakage groove 2132b are exposed at the same time, so that the deflated gas can enter the first air leakage hole 2132a and the first air leakage groove 2132b at the same time, thereby increasing the deflated flow rate and improving the deflated efficiency.

[0269] Please refer to Fig.19B , Fig.25A and Fig.25B , Fig.25A yes Fig.19A The schematic diagram of the structure of the leakage channel layer 213 in the front cavity 21 in some other embodiments; Fig.25B yes Fig.25A The structure of the leakage channel layer 213 is shown as a schematic diagram cut along the GG line. Fig.25A , Fig.25B The leakage channel layer 213 of the illustrated embodiment may include Fig.23A , Fig. 23B Most of the technical features of the leakage flow channel layer 213 of the illustrated embodiment are mainly described below with the differences between the two, and most of the same contents between the two will not be repeated.

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

[0271] Exemplarily, the first air leakage hole 2132a and the second air leakage hole 2132c both penetrate the first surface 2133 and the second surface 2134, thereby increasing the channel size of the air leakage channel 2132, which is beneficial to increasing the air leakage speed of the air leakage channel 2132. In addition, the second air leakage hole 2132c has an opening facing the air leakage membrane 212. When the first piezoelectric pump is deflated, the air leakage membrane 212 bends toward the base so that the first air leakage hole 2132a and the second air leakage hole 2132c are exposed at the same time, so that the deflated gas can enter the first air leakage hole 2132a and the second air leakage hole 2132c at the same time, thereby increasing the air leakage flow rate and improving the air leakage efficiency.

[0272] Exemplarily, the flow cross-sectional area of ​​the first leakage hole 2132a is larger than the flow cross-sectional area of ​​the second leakage hole 2132c, so that when the first piezoelectric pump 2 is deflated, the gas can quickly enter the first leakage hole 2132a and act as a buffer cache, and when the gas flows from the first leakage hole 2132a with a larger flow cross-sectional area to the second leakage hole 2132c with a smaller flow cross-sectional area, the flow speed of the gas can be increased, thereby increasing the deflation 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 air leakage hole 2132a is the cross-sectional area of ​​the first air leakage hole 2132a perpendicular to the center line of the first air leakage hole 2132a, and the flow cross-sectional area of ​​the second air leakage hole 2132c is the cross-sectional area of ​​the second air leakage hole 2132c perpendicular to the center line of the second air leakage hole 2132c, and the center line of the first air leakage hole 2132a is perpendicular to the center line of the second air leakage hole 2132c.

[0274] Please refer to Fig.19B , Fig.26A and Fig.26B , Fig.26A yes Fig.19A The schematic diagram of the structure of the leakage channel layer 213 in the front cavity 21 in some other embodiments; Fig.26B yes Fig.26AThe structure of the leakage channel layer 213 is shown as a schematic diagram cut along the HH line.

[0275] In some embodiments, the leakage channel layer 213 may include a leakage body layer 213a and at least two extensions 213b, and the extensions 213b are arranged at the outer periphery of the leakage body layer 213a. The leakage body layer 213a may include a first surface 2133, a second surface 2134, and a side surface 2135. The first surface 2133 faces the ventilation layer 214, the first surface 2133 and the second surface 2134 are arranged opposite to each other, and the side surface 2135 connects the first surface 2133 and the second surface 2134. The number of the extensions 213b is the same as the number of the leakage channels 2132, and one extension 213b is arranged corresponding to one leakage channel 2132. The leakage channel 2132 may include a first leakage hole 2132a, a first leakage groove 2132b, and a third leakage hole 2132d connected in sequence, and the first leakage hole 2132a passes through the first surface 2133 and the second surface 2134. The first air leakage groove 2132b is concavely disposed on the first surface 2133. The third air leakage hole 2132d penetrates the extension portion 213b in a direction from the first surface 2133 to the second surface 2134.

[0276] Exemplarily, the extension portion 213b is extended relative to the air leakage body layer 213a to protrude from the first piezoelectric pump 2, and the third air leakage hole 2132d penetrates the extension portion 213b and forms two air leakage ports 2132e arranged opposite to each other on two opposite surfaces of the extension portion 213b, which can reduce the risk of blockage of the air leakage hole, and the double air leakage ports 2132e can improve the air leakage efficiency.

[0277] Exemplarily, the first air leakage groove 2132b is recessed in the first surface 2133, and the opening of the first air leakage groove 2132b facing the ventilation layer 214 can be fitted with the ventilation layer 214 through the air leakage channel layer 213 to achieve sealing. The side of the air leakage channel layer 213 facing away from the ventilation layer 214 at the first air leakage groove 2132b does not need to be sealed, thereby improving the air sealing of the air leakage channel 2132 and facilitating stable air leakage of the air leakage channel 2132.

[0278] In some embodiments, the flow cross-sectional area of ​​the first air leakage hole 2132a is larger than the flow cross-sectional area of ​​the first air leakage groove 2132b, so that when the first piezoelectric pump 2 is deflated, the gas can quickly enter the first air leakage hole 2132a and act as a buffer cache, and when the gas flows from the first air leakage hole 2132a with a larger flow cross-sectional area to the first air leakage groove 2132b with a smaller flow cross-sectional area, the flow speed of the gas can be increased, thereby increasing the deflation 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 air leakage hole 2132a is the cross-sectional area of ​​the first air leakage hole 2132a perpendicular to the center line of the first air leakage hole 2132a, and the flow cross-sectional area of ​​the first air leakage groove 2132b is the cross-sectional area of ​​the first air leakage groove 2132b perpendicular to the extension direction of the first air leakage groove 2132b.

[0280] Please refer to Fig.19B , Fig.27A and Fig.27B , Fig.27A yes Fig.19A The schematic diagram of the structure of the leakage channel layer 213 in the front cavity 21 in some other embodiments; Fig.27B yes Fig.27A The structure diagram of the leakage flow channel layer 213 is shown cut along line II. Fig.27A , Fig.27B The leakage channel layer 213 of the illustrated embodiment may include Fig.26A , Fig.26B Most of the technical features of the leakage flow channel layer 213 of the illustrated embodiment are mainly described below with the differences between the two, and most of the same contents between the two will not be repeated.

[0281] In some embodiments, the first air release groove 2132 b is recessed in the second surface 2134 .

[0282] Exemplarily, the first air leakage groove 2132b is recessed in the second surface 2134, and the first air leakage groove 2132b has an opening facing the air leakage membrane 212. When the first piezoelectric pump is deflated, the air leakage membrane 212 bends toward the base so that the first air leakage hole 2132a and the first air leakage groove 2132b are exposed at the same time, so that the leaked gas can enter the first air leakage hole 2132a and the first air leakage groove 2132b at the same time, thereby increasing the air leakage flow rate and improving the air leakage efficiency.

[0283] Please refer to Fig.19B , Fig.28A and Fig.28B , Fig.28A yes Fig.19A The schematic diagram of the structure of the leakage channel layer 213 in the front cavity 21 in some other embodiments; Fig.28B yes Fig.28A The structure of the leakage channel layer 213 is shown as a schematic diagram cut along the JJ line. Fig.28A , Fig.28B The leakage channel layer 213 of the illustrated embodiment may include Fig.26A , Fig.26B Most of the technical features of the leakage flow channel layer 213 of the illustrated embodiment are mainly described below with the differences between the two, and most of the same contents between the two will not be repeated.

[0284] In some embodiments, the leakage channel layer 213 may include a leakage body layer 213a and at least two extensions 213b, and the extensions 213b are arranged at the outer periphery of the leakage body layer 213a. The leakage body layer 213a may include a first surface 2133, a second surface 2134, and a side surface 2135. The first surface 2133 faces the ventilation layer 214, the first surface 2133 and the second surface 2134 are arranged opposite to each other, and the side surface 2135 connects the first surface 2133 and the second surface 2134. The number of the extensions 213b is the same as the number of the leakage channels 2132, and one extension 213b is arranged corresponding to one leakage channel 2132. The leakage channel 2132 may include a first leakage hole, a second leakage hole 2132c, and a third leakage hole 2132d connected in sequence. The first leakage hole 2132a and the second leakage hole 2132c penetrate the first surface 2133 and the second surface 2134. The third air leakage hole 2132 d penetrates the extension portion 213 b in a direction from the first surface 2133 to the second surface 2134 .

[0285] In some embodiments, the first air leakage hole 2132a and the second air leakage hole 2132c both penetrate the first surface 2133 and the second surface 2134, thereby increasing the channel size of the air leakage channel 2132, which is beneficial to increasing the air leakage speed of the air leakage channel 2132. In addition, the second air leakage hole 2132c has an opening facing the air leakage membrane 212. When the first piezoelectric pump 2 is deflated, the air leakage membrane 212 bends toward the base so that the first air leakage hole 2132a and the second air leakage hole 2132c are exposed at the same time, so that the deflated gas can enter the first air leakage hole 2132a and the second air leakage hole 2132c at the same time, thereby increasing the air leakage flow rate and improving the air leakage efficiency.

[0286] Exemplarily, the flow cross-sectional area of ​​the first leakage hole 2132a is larger than the flow cross-sectional area of ​​the second leakage hole 2132c, so that when the first piezoelectric pump 2 is deflated, the gas can quickly enter the first leakage hole 2132a and act as a buffer cache, and when the gas flows from the first leakage hole 2132a with a larger flow cross-sectional area to the second leakage hole 2132c with a smaller flow cross-sectional area, the flow speed of the gas can be increased, thereby increasing the deflation 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 air leakage hole 2132a is the cross-sectional area of ​​the first air leakage hole 2132a perpendicular to the center line of the first air leakage hole 2132a, and the flow cross-sectional area of ​​the second air leakage hole 2132c is the cross-sectional area of ​​the second air leakage hole 2132c perpendicular to the center line of the second air leakage hole 2132c, and the center line of the first air leakage hole 2132a is perpendicular to the center line of the second air leakage hole 2132c.

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

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

[0290] It should be noted that all the above drawings are illustrative illustrations of the present application and do not represent the actual size of the product. Moreover, the size ratio relationship between the components in the drawings is not intended to limit the actual product of the present application.

[0291] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or substitutions, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A pump module (10), characterized in that: include: An integrated seat (1) comprises a seat body (11) and a vent nozzle (12); the seat body (11) comprises a first mounting surface (111) and a second mounting surface (112) arranged opposite to each other; the first mounting surface (111) is provided with a first air delivery port (1111); the second mounting surface (112) is provided with a second air delivery port (1121); the vent nozzle (12) is fixed to the seat body (11) and is located on a side of the first mounting surface (111) facing away from the second mounting surface (112); 1) having a first air channel (113) and a second air channel (114) located between the first mounting surface (111) and the second mounting surface (112), the first air channel (113) connecting the first air delivery port (1111) and the vent nozzle (12), the second air channel (114) connecting the second air delivery port (1121) and the vent nozzle (12), and the ratio of the length of the first air channel (113) to the length of the second air channel (114) being in the range of 0.9 to 1.1; A first piezoelectric pump (2) is fixed to the first mounting surface (111) and is connected to the first air delivery port (1111); and The second piezoelectric pump (3) is fixed to the second mounting surface (112) and is connected to the second air delivery port (1121).

2. The pump module (10) according to claim 1, characterized in that: The first air channel (113) 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 the cross-sectional area of ​​the first part, and the ratio of the length of the second part to the length of the first air channel (113) is less than or equal to 0.

1.

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

4. The pump module (10) according to any one of claims 1 to 3, characterized in that: The extension path of the first airway (113) comprises at least two straight segments and at least one curved segment, and two adjacent straight segments are smoothly connected by the curved segment; Alternatively, the extension path of the first airway (113) includes a straight line segment and at least one curved line segment; Alternatively, the extension path of the first air channel (113) is in the shape of a spline curve.

5. The pump module (10) according to any one of claims 1 to 4, characterized in that: The number of the first piezoelectric pumps (2) is plural, the number of the first gas delivery ports (1111) and the first gas channels (113) is the same as the number of the first piezoelectric pumps (2), and one first piezoelectric pump (2) corresponds to one first gas delivery port (1111) and one first gas channel (113); or, The number of the second piezoelectric pumps (3) is multiple, the number of the second air delivery ports (1121) and the second air channels (114) is the same as the number of the second piezoelectric pumps (3), and one second piezoelectric pump (3) corresponds to one second air delivery port (1121) and one second air channel (114).

6. The pump module (10) according to any one of claims 1 to 5, 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.

7. The pump module (10) according to any one of claims 1 to 6, characterized in that: The seat body (11) comprises a first seat (11a) and a second seat (11b) which are sealed and connected, the first seat (11a) having the first mounting surface (111), the first seat (11a) having a first strip groove (113a), a second strip groove (114a) and a first confluence groove (115a) facing the second seat (11b), one end of the first strip groove (113a) being connected to the first gas delivery port (1111), the other end of the first strip groove (113a) being connected to the first confluence groove (115a), and one end of the second strip groove (114a) being connected to the first confluence groove (115a); The second seat (11b) has the 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 gas delivery port (1121), and the other end of the fourth strip groove (114b) is connected to the second confluence groove (115b); The first strip groove (113a) cooperates with the third strip groove (113b) to form the first air channel (113), the second strip groove (114a) cooperates with the fourth strip groove (114b) to form the second air channel (114), the first confluence groove (115a) cooperates with the second confluence groove (115b) to form a confluence channel (115), and the confluence channel (115) is connected to the ventilation nozzle (12).

8. The pump module (10) according to claim 7, characterized in that: The second seat (11b) further comprises a glue dispensing groove (117), wherein the glue dispensing groove (117) is separated from the third strip-shaped groove (113b) and is separated from the fourth strip-shaped groove (114b); Alternatively, the first seat (11a) has a glue dispensing groove (117), and the glue dispensing groove (117) is separated from the first strip-shaped groove (113a) and separated from the second strip-shaped groove (114a).

9. The pump module (10) according to any one of claims 1 to 8, characterized in that: The pump module (10) further comprises a sealing ring (4), wherein the sealing ring (4) is arranged between the first mounting surface (111) and the first piezoelectric pump (2), and seals the base (11) and the first piezoelectric pump (2), and the sealing ring (4) is arranged around the first air delivery port (1111).

10. The pump module (10) according to claim 9, characterized in that: The pump module (10) further comprises a vibration isolation layer (5), wherein the vibration isolation layer (5) is abutted between the first mounting surface (111) and the first piezoelectric pump (2), and the vibration isolation layer (5) is made of a flexible material or an elastic material.

11. The pump module (10) according to any one of claims 1 to 8, characterized in that: The seat body (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 gas delivery port (1111); The pump module (10) further comprises a sealing ring (4), wherein the sealing ring (4) is arranged in the mounting groove (1112) and surrounds the first air delivery port (1111), and the sealing ring (4) seals and connects the seat body (11) and the first piezoelectric pump (2).

12. The pump module (10) according to claim 11, characterized in that: The pump module (10) further comprises a vibration isolation layer (5), wherein the vibration isolation layer (5) is arranged in the installation groove (1112) and abuts against the bottom of the installation groove (1112) and the first piezoelectric pump (2), and the vibration isolation layer (5) is a flexible material or an elastic material.

13. The pump module (10) according to any one of claims 1 to 12, characterized in that: The first piezoelectric pump (2) has an air leakage port (2132e), and the air leakage port (2132e) is connected to the first air supply port (1111); The integrated seat (1) further comprises a limit platform (116), wherein the limit platform (116) is fixed to the seat body (11) and protrudes relative to the first mounting surface (111), and the limit platform (116) is arranged on the peripheral side of the first piezoelectric pump (2), and the limit platform (116) is provided with an avoidance groove (1161), and the avoidance groove (1161) is arranged to avoid the air leakage port (2132e).

14. The pump module (10) according to any one of claims 1 to 13, characterized in that: The first piezoelectric pump (2) further comprises an air vent (2141), an air port (2111) and at least two air leakage channels (2132), wherein the air vent (2141) is connected to the first air delivery port (1111); When the pump module (10) is inflated, the gas port (2111) is connected to the vent (2141), and the vent (2141) is isolated from at least two of the gas leakage channels (2132), and the gas flows out through the gas port (2111), the vent (2141), the first gas delivery port (1111), the first gas channel (113), and the vent nozzle (12) in sequence; When the pump module (10) is deflated, the vent (2141) is connected to at least two of the deflation channels (2132), and the gas port (2111) is isolated from the vent (2141), and the gas is discharged in sequence through the vent nozzle (12), the first gas delivery port (1111), the first gas channel (113), the vent (2141) and at least two of the deflation channels (2132).

15. The pump module (10) according to claim 14, characterized in that: The first piezoelectric pump (2) comprises a front cavity (21), a piezoelectric vibrator (22) and a rear cavity (23) which are stacked in sequence, and the front cavity (21) comprises: A base (211) having the gas port (2111), wherein the gas port (2111) is used to receive gas generated by the vibration of the piezoelectric vibrator (22); An air release film (212) is located on a side of the base (211) away from the piezoelectric vibrator (22), and the air release film (212) has a first through hole (2121); a leak channel layer (213), located on a side of the leak film (212) away from the base (211), the leak channel layer (213) having a second through hole (2131) and at least two leak channels (2132) arranged around the second through hole (2131), the leak channels (2132) being spaced apart from the second through hole (2131) and at least part of the leak channels (2132) being in communication with the outside of the first piezoelectric pump (2); and A ventilation layer (214), located on a side of the air leakage channel layer (213) away from the air leakage membrane (212), the ventilation layer (214) having the ventilation opening (2141), the ventilation opening (2141) being connected to the second through hole (2131); When the pump module (10) is inflated, gas enters the base (211) through the gas port (2111), the gas pushes the gas leakage membrane (212) to bend in the direction of the gas leakage channel layer (213), and flows out through the first through hole (2121), the second through hole (2131) and the gas vent (2141) in sequence; When the pump module (10) is deflated, gas enters the second through hole (2131) through the vent (2141), the gas pushes the deflation membrane (212) to bend toward the base (211), and the gas is deflated through at least two of the deflation channels (2132).

16. The pump module (10) according to claim 15, characterized in that: The base (211) comprises a base (2112) and a first boss (2113), the base (2112) having a groove (2114) arranged toward the air release membrane (212), the first boss (2113) protruding from the bottom wall of the groove (2114), and the air port (2111) surrounds the first boss (2113) and penetrates the bottom wall of the groove (2114); The air release membrane (212) comprises a membrane body (2122) and a second boss (2123), the membrane body (2122) is located on a side of the base (211) away from the piezoelectric vibrator (22), the membrane body (2122) blocks the groove (2114), the second boss (2123) is convexly arranged on the surface of the membrane body (2122) facing the base (211), the second boss (2123) abuts against the first boss (2113), the first through hole (2121) passes through the membrane body (2122) and the second boss (2123), and the opening of the first through hole (2121) close to the base (211) is blocked by the first boss (2113); When the pump module (10) is inflated, the gas enters the groove (2114) through the gas port (2111), and the gas pushes the air leakage membrane (212) to bend toward the second through hole (2131), the second boss (2123) is out of contact with the first boss (2113), the first through hole (2121) is connected to the groove (2114), and the air leakage membrane (212) is in contact with the air leakage channel layer (213), and the second through hole (2131) is separated from the air leakage channel (2132); When the pump module (10) is deflated, the gas enters the second through hole (2131) through the vent (2141), and the gas pushes the deflation membrane (212) to bend toward the inside of the groove (2114), the second boss (2123) abuts against the first boss (2113), the first through hole (2121) is separated from the groove (2114), and the portion of the deflation membrane (212) corresponding to the deflation channel (2132) and the second through hole (2131) is out of contact with the deflation channel layer (213), and the second through hole (2131) is connected to the deflation channel (2132).

17. The pump module (10) according to claim 16, characterized in that: The leakage channel layer (213) comprises a first surface (2133), a second surface (2134) and a side surface (2135), wherein the first surface (2133) faces the ventilation layer (214), the second surface (2134) is arranged opposite to the first surface (2133), and the side surface (2135) connects the first surface (2133) and the second surface (2134); The air leakage channel (2132) comprises a first air leakage hole (2132a) and a first air leakage groove (2132b), wherein the first air leakage hole (2132a) passes through the first surface (2133) and the second surface (2134), and the first air leakage groove (2132b) is recessed in the first surface (2133) or the second surface (2134), one end of the first air leakage groove (2132b) is connected to the first air leakage hole (2132a), and the other end of the first air leakage groove (2132b) passes through the side surface (2135) to form an air leakage port (2132e), wherein the flow cross-sectional area of ​​the first air leakage hole (2132a) is greater than the flow cross-sectional area of ​​the first air leakage groove (2132b); Alternatively, the air leakage channel (2132) includes a first air leakage hole (2132a) and a second air leakage hole (2132c), the first air leakage hole (2132a) and the second air leakage hole (2132c) both pass through the first surface (2133) and the second surface (2134), one end of the second air leakage hole (2132c) is connected to the first air leakage hole (2132a), and the other end of the second air leakage hole (2132c) passes through the side surface (2135) to form an air leakage port (2132e), wherein a flow cross-sectional area of ​​the first air leakage hole (2132a) is greater than a flow cross-sectional area of ​​the second air leakage hole (2132c).

18. The pump module (10) according to claim 16, characterized in that: The leakage channel layer (213) comprises a leakage main body layer (213a) and at least two extension parts (213b), wherein the extension parts (213b) are arranged at the outer periphery of the leakage main body layer (213a), the leakage main body layer (213a) comprises a first surface (2133), a second surface (2134) and a side surface (2135), wherein the first surface (2133) faces the ventilation layer (214), the first surface (2133) and the second surface (2134) are arranged opposite to each other, and the side surface (2135) connects the first surface (2133) and the second surface (2134), the number of the extension parts (213b) is the same as the number of the leakage channels (2132), and one extension part (213b) is arranged corresponding to one leakage channel (2132); The air leakage channel (2132) comprises a first air leakage hole (2132a), a first air leakage groove (2132b) and a third air leakage hole (2132d) which are connected in sequence, the first air leakage hole (2132a) passes through the first surface (2133) and the second surface (2134), the first air leakage groove (2132b) is recessed in the first surface (2133) or the second surface (2134), and the third air leakage hole (2132d) passes through the extension portion (213b) in the direction from the first surface (2133) to the second surface (2134), wherein the flow cross-sectional area of ​​the first air leakage hole (2132a) is greater than the flow cross-sectional area of ​​the first air leakage groove (2132b); Alternatively, the air leakage channel (2132) includes a first air leakage hole (2132a), a second air leakage hole (2132c) and a third air leakage hole (2132d) which are connected in sequence, the first air leakage hole (2132a) and the second air leakage hole (2132c) pass through the first surface (2133) and the second surface (2134), and the third air leakage hole (2132d) passes through the extension portion (213b) in a direction from the first surface (2133) to the second surface (2134), wherein a flow cross-sectional area of ​​the first air leakage hole (2132a) is greater than a flow cross-sectional area of ​​the second air leakage hole (2132c).

19. A wearable device (1000), characterized in that: The wearable device (1000) comprises: A main body (100), the main body (100) comprising a pump module (10) according to any one of claims 1 to 18; and The fixing belt (200) comprises an air bag (200a), and the pump module (10) is used to inflate the air bag (200a).

20. The wearable device (1000) according to claim 19, characterized in that: The main body (100) further comprises 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 arranged 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.

21. The wearable device (1000) according to claim 20, characterized in that: The main body (100) further comprises: an air pressure sensor (40), the air pressure sensor (40) being electrically connected to the controller (20); and An air circuit adapter (50), wherein the channel in the air circuit adapter (50) has a first end (501) and a second end (502) arranged opposite to each other, wherein the first end (501) is connected to the ventilation nozzle (12), and the second end (502) includes a first side (5021) and a second side (5022) arranged opposite to each other, wherein the first side (5021) is connected to the air bag (200a), and the second side (5022) is connected to the air pressure sensor (40), and the air pressure sensor (40) is used to detect the current air pressure value of the pump module (10) inflating the air bag (200a) and transmit it to the controller (20).

22. The wearable device (1000) according to claim 21, 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 increases linearly with time.

23. The wearable device (1000) according to claim 21 or 22, characterized in that: The second side (5022) is provided with a detection air channel (5023), the detection air channel (5023) having at least one bending path, and the detection air channel (5023) connects the channel in the air path adapter (50) and the air pressure sensor (40).

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