Piezoelectric pump, pneumatic comfort system and seat

Abstract

The utility model relates to the technical field of piezoelectric pumps, in particular to a piezoelectric pump, a pneumatic comfort system and a seat. The piezoelectric pump comprises a pump body, an outer shell and a circuit board, a piezoelectric vibrator capable of vibrating and pumping fluid is arranged in the pump body, the outer shell is arranged on one side of the pump body, a containing space is defined by the outer shell and the pump body, the circuit board is arranged in the containing space, and the circuit board is electrically connected with the piezoelectric vibrator. By means of the mode, the pump body is arranged in the containing space between the outer shell and the circuit board, the pump body does not need to be wrapped by the outer shell, and the size of the piezoelectric pump can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of piezoelectric pumps, and in particular to a piezoelectric pump, a pneumatic comfort system, and a seat. Background Art

[0002] A piezoelectric pump is a pump that generates a continuous fluid source by repeatedly compressing and expanding the fluid cavity through high-frequency vibrations generated by piezoelectric ceramic plates under the action of a driving voltage. It has the advantages of small size, light weight, low power consumption, low noise, and easy automatic control. It is widely used in civil, medical, industrial production, national defense science and technology and other fields.

[0003] A piezoelectric pump primarily consists of a control circuit board and a pump body. The pump body houses a piezoelectric ceramic sheet and an FPC electrically connected to it. The circuit board applies a driving voltage to the piezoelectric ceramic sheet via the FPC. During piezoelectric pump assembly, the pump body and control circuit board are connected and then enclosed in a housing, making the pump bulky. Utility Model Content

[0004] The embodiments of the present application aim to provide a piezoelectric pump, a pneumatic comfort system, and a seat, so as to at least improve the problem of the large size of the piezoelectric pump.

[0005] In order to solve the above technical problems, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, embodiments of the present application provide a piezoelectric pump comprising a pump body, an outer shell, and a circuit board. The pump body is provided with a piezoelectric vibrator capable of vibrating and pumping a fluid. The outer shell is disposed on one side of the pump body, and the outer shell and the pump body enclose a housing. The circuit board is disposed within the housing and is electrically connected to the piezoelectric vibrator.

[0007] In some embodiments, the outer shell is provided with a notch, the circuit board is provided with plug-in terminals, and the plug-in terminals are exposed outward from the notch.

[0008] In some embodiments, the pump body defines a first connection hole, the circuit board defines a second connection hole, and the outer shell defines a third connection hole. The piezoelectric pump further includes a first fastener and a connector, the first fastener passing through the first and second connection holes and connected to one end of the connector. The piezoelectric pump further includes a second fastener passing through the third connection hole and connected to the other end of the connector.

[0009] In some embodiments, at least one pressure chamber is enclosed in the pump body, the piezoelectric vibrator is arranged in the pressure chamber to seal and separate the pressure chamber into a first chamber and a second chamber with variable volume, the side of the pump body facing away from the outer shell is provided with a confluence hole connected to the first chamber, a first fluid channel connected to the first chamber and the second chamber is enclosed in the pump body, the port of the first fluid channel connected to the first chamber is provided with a first one-way valve that controls the fluid to flow only from the first chamber into the first fluid channel, a second fluid channel is also provided at a position corresponding to the second chamber in the pump body, one end of the second fluid channel is connected to the second chamber and is provided with a second one-way valve that controls the fluid to flow only from the second chamber into the second fluid channel.

[0010] In some embodiments, the number of the pressure chambers is at least two, and the pump body is provided with a discharge port, which is connected to the other end of the second fluid channel corresponding to each pressure chamber through a provided discharge channel.

[0011] In some embodiments, the number of the pressure chambers is at least two, wherein the other end of the second fluid channel in at least one of the pressure chambers is communicated with the confluence hole in the adjacent pressure chamber.

[0012] In some embodiments, the side of the pump body where the confluence hole is provided is also covered with a microporous filter.

[0013] In some embodiments, a plurality of ribs are provided on a side of the pump body facing away from the outer shell, and the microporous filter is partially in contact with the ribs.

[0014] In a second aspect, an embodiment of the present application provides a pneumatic comfort system, which includes any piezoelectric pump as described above.

[0015] In a third aspect, an embodiment of the present application provides a seat comprising the pneumatic comfort system.

[0016] In the piezoelectric pump, pneumatic comfort system and seat of the embodiments of the present application, the pump body is arranged in the accommodating space between the outer shell and the circuit board. The outer shell does not need to wrap the pump body, which is conducive to reducing the volume of the piezoelectric pump.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 Schematic diagram of the structure of the piezoelectric pump according to an embodiment of the present application;

[0020] Figure 2 is an exploded view of a piezoelectric pump according to an embodiment of the present application;

[0021] Figure 3 is a three-dimensional cross-sectional view of a piezoelectric pump according to an embodiment of the present application;

[0022] Figure 4 This is an exploded view of the pump body of an embodiment of the present application;

[0023] Figure 5 is an exploded view of the second shell and the first one-way valve of an embodiment of the present application;

[0024] Figure 6 is a three-dimensional cross-sectional view of the first shell of an embodiment of the present application;

[0025] Figure 7 It is a three-dimensional cross-sectional view of a piezoelectric vibrator according to an embodiment of the present application.

[0026] The accompanying drawings in the specific implementation manner are as follows:

[0027] 100. Piezoelectric pump;

[0028] 1. Pump body; 11. First connecting hole; 111. First hole section; 112. Second hole section;

[0029] 12. First shell; 121. Accommodation groove; 122. Second pump groove; 123. Second fluid channel; 124. Second mounting groove; 125. Discharge port; 126. Fourth connecting hole; 127. Wire hole;

[0030] 13. Second shell; 131. First pump groove; 132. Manifold hole; 133. First mounting groove; 134. Rib; 135. Fifth connecting hole;

[0031] 14. Piezoelectric vibrator; 141. Conductive base; 142. Piezoelectric ceramic piece; 143. Counterweight;

[0032] 15. First one-way valve;

[0033] 16. Second one-way valve;

[0034] 17. Microporous filter; 18. Third fastener; 19. Second connecting member;

[0035] 2. Circuit board; 21. Second connection hole; 22. Plug terminal; 23. Connection terminal;

[0036] 3. Outer shell; 31. Third connecting hole; 32. Notch;

[0037] 4. First fastener; 5. Connector; 6. Second fastener;

[0038] a, accommodating space; 1a, pressure chamber; 1a1, first chamber; 1a2, second chamber; 1b, first fluid channel; 1b1, first section; 1b2, second section. DETAILED DESCRIPTION

[0039] To facilitate understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply 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.

[0042] In the description of the embodiments of this application, the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In the description of the embodiments of this application, the meaning of "plurality" is two or more, unless otherwise specifically defined.

[0043] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0044] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0045] See also Figures 1 to 3 The embodiment of the present application provides a piezoelectric pump 100, which includes a pump body 1, a circuit board 2, and an outer shell 3. The pump body 1 is used to pump fluid. The outer shell 3 is arranged on one side of the pump body 1, and the outer shell 3 and the pump body 1 are surrounded to form an accommodating space a. The circuit board 2 is arranged in the accommodating space a, and the circuit board 2 is electrically connected to the pump body 1. By arranging the pump body 1 in the accommodating space a between the outer shell 3 and the circuit board 2, the outer shell 3 does not need to wrap the entire pump body 1, which is conducive to reducing the volume of the piezoelectric pump 100.

[0046] For the shape and assembly of the pump body 1, circuit board 2 and outer shell 3, please refer to Figure 1 and Figure 2 The pump body 1 is in the shape of a rectangular parallelepiped, the circuit board 2 is in the shape of a rectangular parallelepiped sheet, and the outer shell 3 is in the shape of a rectangular parallelepiped shell with an opening on one side. The circuit board 2 is arranged on one side of the pump body 1 along the thickness direction. Along the length direction of the pump body 1, the length of the circuit board 2 is less than the length of the pump body 1, and along the width direction of the pump body 1, the width of the circuit board 2 is less than the width of the pump body 1. The outer shell 3 is covered on one side of the pump body 1 along the thickness direction through one side of the opening, thereby forming an accommodating space a between the outer shell 3 and the pump body 1. It can be understood that when the outer shell 3 is installed on the pump body 1, the piezoelectric pump 100 is in the shape of a rectangular parallelepiped as a whole, which is standardized and easy to install in external equipment, such as in car seats and massage chairs. It is also not easy to produce irregular gaps, such as triangular gaps, between the outer shell 3 and other components in the external equipment, which is conducive to improving the space utilization of the external equipment. The circuit board 2 and the outer shell 3 are both arranged on one side of the pump body 1 along the thickness direction, which is beneficial to shortening the length and width of the piezoelectric pump 100, making the piezoelectric pump 100 closer to a cube shape, and also facilitating the installation of the piezoelectric pump 100.

[0047] The pump body 1 defines a first connection hole 11, and the circuit board 2 defines a second connection hole 21. The piezoelectric pump 100 further includes a first fastener 4 and a connector 5. The first fastener 4 passes through the first connection hole 11 and the second connection hole 21 and is connected to the connector 5. The circuit board 2 is mounted to the pump body 1 via the first fastener 4 and the connector 5. The first fastener 4 may be a bolt, and the connector 5 may be a nut. There may be multiple first connection holes 11 and second connection holes 21 to enhance the secure attachment of the circuit board 2 to the pump body 1. There may be four second connection holes 21, each located adjacent to the four corners of the circuit board 2.

[0048] Furthermore, the outer shell 3 is provided with a third connecting hole 31. The piezoelectric pump 100 also includes a second fastener 6, which passes through the third connecting hole 31 and is connected to the connecting member 5. The outer shell 3 is mounted on the pump body 1 by the second fastener 6 and the connecting member 5, and the second fastener 6 is directly connected to the connecting member 5, which helps to reduce the number of openings on the pump body 1 and the number of connecting members 5 used. The second fastener 6 can be a bolt, and the connecting member 5 can be a nut or a nut column. The nut column is a nut with an axial length greater than or equal to the outer diameter. The use of a nut column helps to increase the connection strength between the connecting member 5 and the first fastener 4 and the second fastener 6. The number of third connecting holes 31 can be multiple to enhance the firmness of the outer shell 3 installed on the pump body 1. The number of third connecting holes 31 can be four, corresponding to the four connecting members 5 respectively.

[0049] It is understood that the axes of the corresponding first connecting hole 11, second connecting hole 21 and third connecting hole 31 coincide with each other. The first fastener 4 and the second fastener 6 can be connected to opposite ends of the connecting member 5, respectively.

[0050] In some other embodiments, the circuit board 2 can be snap-connected to the pump body 1 , and the outer shell 3 can be snap-connected to the pump body 1 .

[0051] For pump body 1 above, see Figure 4 The pump body 1 includes a first shell 12 and a second shell 13. The third connecting hole 31 includes a first hole segment 111 and a second hole segment 112. The first shell 12 is provided with the first hole segment 111, and the second shell 13 is provided with the second hole segment 112. Therefore, when the circuit board 2 is mounted to the pump body 1 via the first fastener 4 and the connector 5, the first shell 12 and the second shell 13 are also secured together, which helps reduce the number of connectors 5. It is understood that the axes of the corresponding first hole segments 111 and second hole segments 112 coincide with each other.

[0052] In some other embodiments, the first shell 12 can be snap-connected to the second shell 13 .

[0053] Please refer to Figure 2A receiving groove 121 is provided along one side of the pump body 1 along its thickness. This groove 121 accommodates at least a portion of the circuit board 2. Electronic components or pins on the side of the circuit board 2 facing the pump body 1 can be inserted into the receiving groove 121, thereby reducing the risk of damage to the circuit board 2 caused by compression from the pump body 1. In this embodiment, the second shell 13 is located on the side of the first shell 12 facing away from the circuit board 2, meaning that the receiving groove 121 is provided in the first shell 12.

[0054] In some embodiments, see Figure 3 A piezoelectric vibrator 14 capable of vibrating and pumping fluid is provided in the pump body 1, and the circuit board 2 is electrically connected to the piezoelectric vibrator 14. That is, the circuit board 2 applies a driving voltage to the piezoelectric vibrator 14, causing the piezoelectric vibrator 14 to deform to pump the fluid.

[0055] For details, please refer to Figure 3 At least one pressure chamber 1a is enclosed in the pump body 1, and a piezoelectric vibrator 14 is arranged in the pressure chamber 1a to seal and separate the pressure chamber 1a into a first chamber 1a1 and a second chamber 1a2 with variable volume. A confluence hole 132 communicating with the first chamber 1a1 is provided on the side of the pump body 1 facing away from the outer shell 3, and a first fluid channel 1b communicating with the first chamber 1a1 and the second chamber 1a2 is enclosed in the pump body 1. A first fluid channel 1b communicating with the first chamber 1a1 and the second chamber 1a2 is provided at a port of the first fluid channel 1b communicating with the first chamber 1a1. A first one-way valve 15 for controlling the fluid to flow only from the first chamber 1a1 into the first fluid channel 1b is provided. A second fluid channel 123 is also provided at a position corresponding to the second chamber 1a2 in the pump body 1. One end of the second fluid channel 123 is communicated with the second chamber 1a2 and is provided with a second one-way valve 16 for controlling the fluid to flow only from the second chamber 1a2 into the second fluid channel 123.

[0056] Next, the structure of the pump body 1 will be described in detail in conjunction with the first shell 12 and the second shell 13 .

[0057] See also Figures 3 to 5The piezoelectric vibrator 14 is clamped between the first shell 12 and the second shell 13. The second shell 13 is provided with a first pump groove 131 and a confluence hole 132, and the first shell 12 is provided with a second pump groove 122 and a second fluid channel 123. The first pump groove 131 and the second pump groove 122 are arranged opposite to each other, thereby forming a pressure chamber 1a. The edge of the piezoelectric vibrator 14 is sealed with the edge of the first pump groove 131 and the second pump groove 122, thereby forming a first chamber 1a1 and a second chamber 1a2. The edge of the piezoelectric vibrator 14 and the edge of the first pump groove 131 and the second pump groove 122 can be bonded to achieve a sealed connection; or the first shell 12 and the second shell 13 can cooperate to clamp the edge of the piezoelectric vibrator 14 so that the edge of the piezoelectric vibrator 14 is in close contact with the edge of the first pump groove 131 and the second pump groove 122 to achieve a sealed connection. The sealed connection achieved by the first shell 12 and the second shell 13 cooperating to clamp the edge of the piezoelectric vibrator 14 simplifies the assembly steps of the pump body 1 and facilitates the disassembly and repair of the pump body 1. The edge of the piezoelectric vibrator 14 can be provided with a sealing ring to enhance the sealing effect between the edge of the piezoelectric vibrator 14 and the edges of the first pump groove 131 and the second pump groove 122. The sealing ring can be made of rubber or silicone.

[0058] The piezoelectric vibrator 14 is configured to deform to change the volume of the first chamber 1a1 and the second chamber 1a2. In particular, when deformed in the direction separating the piezoelectric vibrator 14 and the first shell 12, the volume of the first chamber 1a1 and the second chamber 1a2 changes. The piezoelectric vibrator 14 achieves a concave-convex reciprocating deformation by inputting a driving voltage, thereby achieving a larger volume change in the first chamber 1a1 and improving the efficiency of pumping the fluid. Optionally, the second pump tank 122 and the second pump tank 122 are cylindrical, and the piezoelectric vibrator 14 is disc-shaped.

[0059] A portion of first fluid channel 1b is disposed in first shell 12, and another portion is disposed in second shell 13. When first shell 12 and second shell 13 are engaged, the portion of first fluid channel 1b in first shell 12 communicates with the portion of first fluid channel 1b in second shell 13. The portion of first fluid channel 1b disposed in second shell 13 is first section 1b1, while the portion disposed in first shell 12 is second section 1b2.

[0060] See also Figure 4 and Figure 5The second housing 13 has a first mounting groove 133 at the bottom of the first pump groove 131. The first mounting groove 133 connects the first pump groove 131 with the first fluid channel 1b. The first one-way valve 15 is installed in the first mounting groove 133 to separate the first pump groove 131 from the first fluid channel 1b. The first housing 12 has a second mounting groove 124 at the bottom of the second pump groove 122. The second mounting groove 124 connects the second pump groove 122 with the second fluid channel 123. The second one-way valve 16 is installed in the second mounting groove 124 to separate the second pump groove 122 from the second fluid channel 123.

[0061] The first one-way valve 15 allows fluid in the first pump groove 131 to flow into the first fluid channel 1b, but blocks it in the opposite direction. The second one-way valve 16 allows fluid in the second pump groove 122 to flow into the second fluid channel 123, but blocks it in the opposite direction. When the volume of the first chamber 1a1 increases, fluid flows into the first chamber 1a1 through the confluence hole 132. When the volume of the first chamber 1a1 decreases, the fluid in the first chamber 1a1 flows into the first fluid channel 1b through the first one-way valve 15. When the volume of the second chamber 1a2 increases, fluid flows into the second chamber 1a2 through the first fluid channel 1b. When the volume of the second chamber 1a2 decreases, the fluid in the second chamber 1a2 flows into the second fluid channel 123 through the second one-way valve 16. Thus, the fluid is pumped from the confluence hole 132 to the first fluid channel 1b, and then pumped from the first fluid channel 1b to the second fluid channel 123. The repeated deformation of the piezoelectric vibrator 14 can achieve the fluid being sucked in from the confluence hole 132 and discharged from the second fluid channel 123, thereby achieving fluid pumping. Optionally, the first one-way valve 15 and the second one-way valve 16 are diaphragm one-way valves, which can be set in a thin sheet shape, which is conducive to reducing the thickness of the pump body 1. For reference, the patent US8297947B2 Figure 7 A to Figure 7 D shows a one-way valve.

[0062] When the volume of the first chamber 1a1 decreases, the fluid in the first chamber 1a1 flows into the first fluid channel 1b through the first one-way valve 15, and some of the fluid flows back out of the first chamber 1a1 through the confluence hole 132, reducing the efficiency of the first chamber 1a1 in pumping fluid. In the embodiment of the present application, the first chamber 1a1 and the second chamber 1a2 are located on opposite sides of the same piezoelectric vibrator 14. The volume changes of the first chamber 1a1 and the second chamber 1a2 have opposite trends. When the volume of the first chamber 1a1 decreases, the volume of the second chamber 1a2 increases, which helps to produce a suction effect on the fluid in the first fluid channel 1b and the first chamber 1a1, reduces the fluid from flowing back out of the first chamber 1a1 through the confluence hole 132, and increases the efficiency of the first chamber 1a1 in pumping fluid. In addition, the deformation of the piezoelectric vibrator 14 simultaneously changes the volume of the first chamber 1a1 and the second chamber 1a2, which helps to improve the performance of the piezoelectric vibrator 14.

[0063] The first mounting groove 133 is adapted to fit within the first one-way valve 15 to enhance the sealing effect of the first one-way valve 15 on the first mounting groove 133. The first one-way valve 15 can be bonded to the inner wall of the first mounting groove 133 using glue to secure the first one-way valve 15 within the first mounting groove 133 and enhance the sealing effect. Similarly, the second mounting groove 124 is adapted to fit within the second one-way valve 16 to enhance the sealing effect of the second one-way valve 16 on the second mounting groove 124. The second one-way valve 16 can be bonded to the inner wall of the second mounting groove 124 using glue to secure the second one-way valve 16 within the second mounting groove 124 and enhance the sealing effect.

[0064] In some embodiments, the number of pressure chambers 1a is at least two. Figure 4 and Figure 5 The first shell 12 defines a plurality of second pump grooves 122, and the second shell 13 defines a plurality of first pump grooves 131, thereby forming a plurality of pressure chambers 1a. Accordingly, the first shell 12 defines a plurality of second fluid channels 123 and a plurality of second sections 1b2 of the first fluid channels 1b, with each second pump groove 122 communicating with each second fluid channel 123 and each second section 1b2. The second shell 13 defines a plurality of confluence holes 132 and a plurality of first sections 1b1 of the first fluid channels 1b, with each first pump groove 131 communicating with each confluence hole 132 and each first section 1b1. The pump body 1 includes multiple piezoelectric vibrators 14, multiple first one-way valves 15 and multiple second one-way valves 16. A piezoelectric vibrator 14 and a first shell 12 are arranged at the second pump groove 122 to form a second chamber 1a2, and are arranged with a second shell 13 at the first pump groove 131 to form a first chamber 1a1; a first one-way valve 15 is arranged at the port of the first fluid channel 1b connecting to the first chamber 1a1; a second one-way valve 16 is arranged at the port of the second fluid channel 123 connecting to the second chamber 1a2. Figure 4 and Figure 5 Taking two first pump grooves 131 and two second pump grooves 122 as an example, the number of the first fluid channel 1b, the second fluid channel 123, the confluence hole 132, the piezoelectric vibrator 14, the first one-way valve 15 and the second one-way valve 16 is also two accordingly.

[0065] Among them, see Figure 6The pump body 1 is provided with a discharge port 125, which communicates with the other end of the second fluid channel 123 corresponding to each pressure chamber 1a through a provided discharge channel. That is, the multiple second fluid channels 123 are interconnected, and the fluid pumped out of the multiple pressure chambers 1a is discharged through the same discharge port 125. This eliminates the need for multiple discharge ports 125, helps reduce production costs, and increases the pumpable fluid flow rate at the discharge port 125. In other words, the multiple pressure chambers 1a are connected in parallel, which helps increase the flow rate of the fluid pumped by the pump body 1.

[0066] In some other embodiments, there are at least two pressure chambers 1a, wherein the other end of the second fluid channel 123 in at least one pressure chamber 1a is connected to the confluence hole 132 in the adjacent pressure chamber 1a. That is, at least two pressure chambers 1a are connected in series, which helps to increase the force of pumping fluid.

[0067] In some embodiments, see Figure 7 The piezoelectric vibrator 14 includes a conductive base 141 and a piezoelectric ceramic piece 142 arranged on one side of the conductive base 141. When the piezoelectric ceramic piece 142 on one side of the conductive base 141 contracts or stretches, the conductive base 141 will be concave or convex toward the side of the piezoelectric ceramic piece 142, thereby achieving deformation and pumping of the fluid. The piezoelectric ceramic piece 142 can be bonded to the conductive base 141. The conductive base 141 can be an FPC (Flexible Printed Circuit), which not only has the deformable characteristics of the conductive base 141, but can also be connected to the piezoelectric ceramic piece 142 through the copper foil of the FPC to form a pin, which facilitates the electrical connection of the piezoelectric ceramic piece 142 to the circuit board 2.

[0068] In some embodiments, see Figure 7 The piezoelectric vibrator 14 also includes a counterweight 143, which is arranged on the side of the conductive base 141 away from the piezoelectric ceramic plate 142. The counterweight 143 is used to balance the weight on both sides of the conductive base 141, reduce the unbalanced vibration during the vibration of the piezoelectric vibrator 14, thereby reducing vibration noise and mechanical stress, and extending the service life of the piezoelectric vibrator 14. Reasonable design of the position and weight of the counterweight 143 can also enable the piezoelectric vibrator 14 to maintain a stable vibration frequency and amplitude during the vibration process, that is, optimize the vibration mode of the piezoelectric vibrator 14, which is conducive to reducing energy loss during the vibration process and improving energy conversion efficiency. For example, the counterweight 143 and the piezoelectric ceramic plate 142 have the same shape and size, the weight of the counterweight 143 and the piezoelectric ceramic plate 142 are equal, and the counterweight 143 and the piezoelectric ceramic plate 142 are symmetrically arranged on opposite sides of the conductive base 141. Optionally, the counterweight 143 is made of stainless steel.

[0069] In some embodiments, see Figure 4The pump body 1 also includes a microporous filter 17, which covers the side of the pump body 1 where the confluence hole 132 is located. Ribs 134 are provided on this side of the pump body 1 to form an air intake groove. Microporous filter 17 allows fluid to pass through and intercepts external impurities. For example, when the fluid is gas, the gas can freely pass through microporous filter 17, but impurities and dust in the air cannot. This prevents clogging of the pump body 1 and extends its service life.

[0070] In some embodiments, see Figure 4 The first shell 12 is provided with a fourth connection hole 126, and the second shell 13 is provided with a fifth connection hole 135; the pump body 1 also includes a third fastener 18 and a second connection member 19, and the third fastener 18 passes through the fourth connection hole 126 and the fifth connection hole 135 to connect with the second connection member 19. Connecting the first shell 12 and the second shell 13 together by the third fastener 18 and the second connection member 19 is conducive to enhancing the stability of the first shell 12 and the second shell 13 in clamping the piezoelectric vibrator 14, and enhancing the sealing effect of the sealed connection between the edge of the piezoelectric vibrator 14 and the edge of the second pump groove 122 and the edge of the first pump groove 131. The third fastener 18 can be a bolt, and the second connection member 19 can be a nut. The number of the fourth connection hole 126 and the fifth connection hole 135 can be multiple to enhance the firmness of the connection between the first shell 12 and the second shell 13.

[0071] When there are multiple pressure chambers 1a, please refer to Figure 4 and Figure 5 The fourth connecting hole 126 is located between two adjacent second pump grooves 122, and the fifth connecting hole 135 is located between two adjacent first pump grooves 131, so as to simultaneously enhance the stability of the first shell 12 and the second shell 13 in clamping the two piezoelectric vibrators 14, which is beneficial to reducing the number of third fasteners 18 and second connecting members 19.

[0072] For board 2 above, see Figure 2 , the circuit board 2 is provided with a plug-in terminal 22, and the plug-in terminal 22 is used to connect to an external device, thereby connecting the circuit board 2 to the external device. The circuit board 2 is also provided with a connecting terminal 23, and the piezoelectric vibrator 14 also includes a cable (not shown in the figure), and the cable is connected to the connecting terminal 23 to connect the piezoelectric vibrator 14 to the circuit board 2. It can be understood that one end of the cable is located in the pressure chamber 1a, and the other end extends out of the pump body 1 to facilitate connection with the plug-in terminal 22. The cable can be an FPC. In some embodiments, the conductive base 141 and the cable of the piezoelectric vibrator 14 are both FPCs, and the cable is extended from the conductive base 141, which is beneficial to increase the connection strength between the cable and the conductive base 141; at the same time, there is no need to provide an electrical connector, which is beneficial to reducing the overall thickness and volume of the cable and the conductive base 141.

[0073] In some embodiments, see Figure 4 and Figure 6 The first shell 12 is provided with a wire hole 127 , which penetrates the first shell 12 along the thickness direction of the first shell 12 , so that the cable can pass through the wire hole 127 from between the first shell 12 and the second shell 13 to the accommodating space a to be connected to the plug terminal 22 .

[0074] For the above outer shell 3, see Figure 1 and Figure 2 The outer shell 3 has a notch 32 through which the plug-in terminal 22 is exposed. External devices can be connected to the plug-in terminal 22 through the notch 32. The notch 32 is adapted to fit the plug-in terminal 22, that is, the notch 32 completely exposes the plug-in terminal 22. The outer shell 3 does not block the plug-in terminal 22, and there is no large gap between the outer shell 3 and the plug-in terminal 22.

[0075] Secondly, embodiments of the present application provide a pneumatic comfort system (not shown), which includes a piezoelectric pump 100. The pneumatic comfort system has the structural features and beneficial effects of the piezoelectric pump 100, which will not be described in detail here. The pneumatic comfort system may include a fluid distribution device and multiple air bags. The fluid distribution device connects the air bags to the piezoelectric pump 100 and is used to control the connection of the air path between the air bags and the piezoelectric pump 100 to independently inflate and deflate the multiple air bags, thereby achieving massage and support for the user.

[0076] Thirdly, embodiments of the present application provide a seat (not shown) that includes a pneumatic comfort system. The seat incorporates the structural features and benefits of the pneumatic comfort system, which will not be further detailed here. The pneumatic comfort system's airbags can be positioned within the seat to provide massage and support for the user.

[0077] In the piezoelectric pump 100, pneumatic comfort system and seat of the embodiment of the present application, the pump body 1 is arranged in the accommodation space a between the outer shell 3 and the circuit board 2. The outer shell 3 does not need to wrap the pump body 1, which is conducive to reducing the volume of the piezoelectric pump 100. The pump body 1, circuit board 2 and outer shell 3 are all rectangular parallelepipeds. The circuit board 2 and outer shell 3 are both arranged on one side of the pump body 1 along the thickness direction, so that the piezoelectric pump 100 is rectangular parallelepiped as a whole. The shape is standardized, which is conducive to improving the space utilization of the external device when the piezoelectric pump 100 is installed on the external device. The pump body 1, circuit board 2 and outer shell 3 are installed together by the first fastener 4, the second fastener 6 and the connector 5, which is conducive to reducing the number of openings on the pump body 1 and reducing the number of connectors 5 used. When the circuit board 2 is installed on the pump body 1 by the first fastener 4 and the connector 5, the first shell 12 and the second shell 13 are also fixed together at the same time, which is conducive to reducing the number of connectors 5. The first cavity 1a1 and the second cavity 1a2 are located on opposite sides of the same piezoelectric vibrator 14 . The deformation of the piezoelectric vibrator 14 changes the volumes of the first cavity 1a1 and the second cavity 1a2 simultaneously, which is beneficial to improving the performance of the piezoelectric vibrator 14 .

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Based on the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above. For the sake of simplicity, they are not provided in detail. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A piezoelectric pump, characterized in that: include: A pump body, wherein a piezoelectric vibrator capable of vibrating and pumping fluid is provided in the pump body; An outer shell is arranged on one side of the pump body, and the outer shell and the pump body are surrounded to form an accommodating space; A circuit board is disposed in the accommodating space, and the circuit board is electrically connected to the piezoelectric vibrator.

2. The piezoelectric pump according to claim 1, wherein The outer shell is provided with a notch, the circuit board is provided with plug-in terminals, and the plug-in terminals are exposed outward from the notch.

3. The piezoelectric pump according to claim 1, wherein The pump body is provided with a first connection hole, the circuit board is provided with a second connection hole, and the outer shell is provided with a third connection hole; The piezoelectric pump further includes a first fastener and a connecting member, wherein the first fastener passes through the first connecting hole and the second connecting hole and is connected to one end of the connecting member; The piezoelectric pump further includes a second fastener, which passes through the third connecting hole and is connected to the other end of the connecting member.

4. The piezoelectric pump according to claim 3, wherein At least one pressure chamber is enclosed in the pump body, the piezoelectric vibrator is arranged in the pressure chamber to seal and separate the pressure chamber into a first chamber and a second chamber with variable volume, the side of the pump body facing away from the outer shell is provided with a confluence hole connected to the first chamber, a first fluid channel connected to the first chamber and the second chamber is enclosed in the pump body, a port of the first fluid channel connected to the first chamber is provided with a first one-way valve that controls the fluid to flow only from the first chamber into the first fluid channel, a second fluid channel is also provided at a position corresponding to the second chamber in the pump body, one end of the second fluid channel is connected to the second chamber and is provided with a second one-way valve that controls the fluid to flow only from the second chamber into the second fluid channel.

5. The piezoelectric pump according to claim 4, wherein: The number of the pressure chambers is at least two, and the pump body is provided with a discharge port, which is communicated with the other end of the second fluid channel corresponding to each pressure chamber through a provided discharge channel.

6. The piezoelectric pump according to claim 4, wherein: The number of the pressure chambers is at least two, wherein the other end of the second fluid channel in at least one of the pressure chambers is communicated with the confluence hole in the adjacent pressure chamber.

7. The piezoelectric pump according to claim 4, wherein: The side of the pump body where the confluence hole is provided is also covered with a microporous filter.

8. The piezoelectric pump according to claim 7, wherein: A plurality of ribs are further provided on a side of the pump body facing away from the outer shell, and the microporous filter sheet is partially in contact with the ribs.

9. A pneumatic comfort system, characterized in that: Comprising the piezoelectric pump according to any one of claims 1 to 8.

10. A seat, characterized in that: Comprising the pneumatic comfort system as claimed in claim 9.

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