Piezoelectric ceramic valve for pneumatic massage

Abstract

The invention discloses a piezoelectric ceramic valve for pneumatic massage, relates to the technical field of pneumatic massage valves, and aims to solve the problem that the opening and closing noise of an electromagnetic valve is high when a massage seat is inflated and deflated. The piezoelectric ceramic valve for pneumatic massage is arranged on the massage air bag, is used for communicating the air pump and the massage air bag, and comprises a valve body, a sealing piece, a piezoelectric ceramic device and a sealing rubber column; the valve body is provided with a first cavity and a second cavity, an air inlet used for being communicated with the air pump is formed in the valve body where the first cavity is located, an air outlet used for being communicated with the massage air bag is formed in the valve body where the second cavity is located, and an air channel communicated with the first cavity and the second cavity is formed in the valve body and is columnar. The gas channel penetrates through the valve body where the first cavity and the second cavity are located in the axis direction of the gas channel so as to form a mounting hole and an exhaust hole. The sealing element is hermetically arranged in the mounting hole; and the piezoelectric ceramic device is arranged in the gas channel along the direction of the gas channel.

Description

Technical Field

[0001] The present application relates to the technical field of pneumatic massage valves, and in particular to a piezoelectric ceramic valve for pneumatic massage. Background Art

[0002] Cars have become an indispensable means of transportation in people's lives. As people's living standards continue to improve, their requirements for the functions of car seats are also increasing. Massage equipment has naturally become an indispensable part of car seats.

[0003] Existing massage systems on car seats typically feature multiple layers of massage airbags that inflate and deflate to provide a massage effect. However, conventional solenoid valves used in these seats can produce a high level of noise during the switching process between inflation and deflation, affecting comfort. Summary of the Invention

[0004] The present application provides a piezoelectric ceramic valve for pneumatic massage, which is used to solve the problem of loud opening and closing noise of the solenoid valve when the massage seat is inflated and deflated.

[0005] The present application provides a piezoelectric ceramic valve for pneumatic massage, which is arranged on a massage airbag and is used to connect the air pump and the massage airbag. The piezoelectric ceramic valve for pneumatic massage includes a valve body, a seal, a piezoelectric ceramic device, a sealing rubber column and a sealing rubber; the valve body has a first cavity and a second cavity, and the valve body where the first cavity is located is provided with an air inlet hole for connecting to the air pump, and the valve body where the second cavity is located is provided with an air outlet hole for connecting to the massage airbag, and a gas channel connecting the first cavity and the second cavity is formed in the valve body, and the gas channel is columnar, and passes through the valve bodies where the first cavity and the second cavity are located respectively along the axial direction of the gas channel to form a mounting hole and an exhaust hole respectively; the seal is sealed in the mounting hole; the piezoelectric ceramic device is arranged in the gas channel along the direction of the gas channel, and there is a gas between the piezoelectric ceramic device and the gas channel. A gap is provided, one end of the piezoelectric ceramic device is fixedly provided on the sealing member, the other end of the piezoelectric ceramic device is provided at the connection between the gas channel and the second cavity, and the end of the piezoelectric ceramic device close to the sealing member is connected to the power supply circuit; a sealing rubber column is formed at the end of the piezoelectric ceramic device, and the sealing rubber column is located in the second cavity, along the direction of the gas channel, the exhaust hole and the gas channel are completely projected onto the sealing rubber column, and along the direction of the gas channel, the distance between the exhaust hole and the gas channel is greater than the length of the sealing rubber column; the sealing rubber column includes a first part and a second part, the first part is used to abut against the gas channel to seal the gas channel, and the second part is used to abut against the exhaust hole to seal the exhaust hole.

[0006] The first cavity in the present application is connected to the air pump through the air inlet, and the second cavity is connected to the massage airbag through the air outlet. The gas channel runs through the two to form an airflow path. The columnar structure of the gas channel ensures the stability of the airflow direction to avoid turbulence affecting the accuracy of the massage air pressure; the seal is installed in the mounting hole to form a seal with the piezoelectric ceramic device, which can prevent gas leakage from the mounting hole and improve air tightness. At the same time, it can fix one end of the piezoelectric ceramic device, and when the piezoelectric ceramic device is deformed, it can drive the movement of the sealing rubber column; the sealing rubber column is located in the second cavity, the first part of the sealing rubber can seal the gas channel, and the second part can seal the exhaust hole.

[0007] Along the direction of the gas channel, the projections of the exhaust holes and the gas channel are completely located inside the sealing rubber column, and the distance between them is greater than the length of the sealing rubber column, forming a "staggered seal". When the sealing rubber column moves, it can block the gas channel or the exhaust holes respectively, thereby realizing precise switching between air intake and exhaust. When the sealing rubber column switches the mode of sealing the exhaust holes and the gas channel, there is little or even no noise, thereby improving the massage comfort.

[0008] In some embodiments of the present application, the sealing rubber column is made of rubber. The high elasticity of the rubber material allows the sealing rubber column to closely adhere to the wall of the gas passage or exhaust hole when abutting the gas passage or exhaust hole, thereby compensating for gaps caused by processing errors, improving sealing reliability, and reducing gas leakage. Furthermore, the cushioning properties of the rubber can reduce noise and wear caused by collision between the sealing rubber column and the valve body.

[0009] In some embodiments of the present application, two second cavities are provided, and the two second cavities are connected to the same first cavity via two gas passages. The two second cavities are connected to the same first cavity via their respective gas passages, achieving a "one-in, two-out" airflow distribution effect, reducing the volume of the valve body, avoiding the complex layout of multiple independent valve bodies, and facilitating a miniaturized design.

[0010] In some embodiments of the present application, a plurality of piezoelectric ceramic valves for pneumatic massage are provided along a distribution direction perpendicular to the two second cavities and along a direction perpendicular to the gas channel, and a plurality of piezoelectric ceramic valves for pneumatic massage form a piezoelectric ceramic valve group.

[0011] Multiple valves are arranged perpendicular to the distribution direction of the second cavity to form a piezoelectric ceramic valve group, which can correspond to the array layout of multiple massage airbags, realize synchronous or zoned control of large massage areas, and improve the uniformity and coverage of the massage experience; each valve independently controls the corresponding airbag, and the vehicle's electronic control system can realize differentiated adjustment of massage intensity and frequency in different areas to meet personalized massage needs.

[0012] In some embodiments of the present application, the multiple first cavities in the piezoelectric ceramic valve group are interconnected, the multiple second cavities in the piezoelectric ceramic valve group are independent of each other, and the piezoelectric ceramic valve group shares one air inlet.

[0013] Multiple first cavities in the piezoelectric ceramic valve group are connected and share an air inlet hole. Only one air pump is needed to supply air to all valves, reducing the number of air pumps and pipeline complexity, and reducing equipment costs and energy consumption; at the same time, unified air intake pressure facilitates overall air pressure control.

[0014] In some embodiments of the present application, the wall of the gas channel extends into the second cavity, and an escape space is formed in the direction of the gas channel away from the gas outlet.

[0015] The gas channel wall extends into the second cavity to form an avoidance space, which provides sufficient space for the movement of the sealing rubber column, avoids the sealing rubber column from colliding or getting stuck with the valve body wall during reciprocating motion, ensures smooth sliding of the piezoelectric ceramic device and extends its service life; and the avoidance space can serve as an airflow buffer area to reduce the obstruction and interference of the airflow when the sealing rubber column moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0017] Figure 1 A cross-sectional schematic diagram of a piezoelectric ceramic valve for pneumatic massage provided in an embodiment of the present application.

[0018] Figure 2 A schematic diagram of a piezoelectric ceramic valve for pneumatic massage provided in an embodiment of the present application.

[0019] Figure 3 A cross-sectional schematic diagram of a piezoelectric ceramic valve group composed of multiple piezoelectric ceramic valves for pneumatic massage provided in an embodiment of the present application.

[0020] Figure 4 Schematic diagram of a piezoelectric ceramic valve group composed of multiple piezoelectric ceramic valves for pneumatic massage provided in an embodiment of the present application.

[0021] Figure 5 A cross-sectional schematic diagram of another embodiment of a piezoelectric ceramic valve for pneumatic massage provided in an embodiment of the present application.

[0022] Figure numerals: 1-valve body; 11-first cavity; 111-air inlet; 12-second cavity; 121-air outlet; 13-gas channel; 14-mounting hole; 15-exhaust hole; 16-chamfer; 17-avoidance space; 2-sealing element; 3-piezoelectric ceramic device; 4-sealing rubber column; 5-piezoelectric ceramic valve group. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connect" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "connected" used in this application have the meaning of conducting electricity. The specific meanings need to be understood in the context.

[0027] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0028] Cars have become an indispensable means of transportation in people's lives. As people's living standards continue to improve, their requirements for the functions of car seats are also increasing. Massage equipment has naturally become an indispensable part of car seats.

[0029] Existing massage systems on car seats typically feature multiple layers of massage airbags that inflate and deflate to provide a massage effect. However, conventional solenoid valves used in these seats can produce a high level of noise during the switching process between inflation and deflation, affecting comfort.

[0030] To do this, please refer to Figure 1 This application provides a piezoelectric ceramic valve for pneumatic massage, which is mounted on a massage airbag and connects an air pump to the massage airbag. The massage airbag can be a vehicle seat airbag, and the air pump is a pump body configured on the seat that provides pressurized gas to the massage airbag. The airbag achieves a massage effect by inflating and deflating the airbag.

[0031] Please refer to Figure 1 The piezoelectric ceramic valve for pneumatic massage includes a valve body 1, a sealing member 2, a piezoelectric ceramic device 3, and a sealing rubber column 4.

[0032] Please refer to Figure 1 The valve body 1 has a first cavity 11 and a second cavity 12. The valve body 1 where the first cavity 11 is located is provided with an air inlet 111 for communicating with the air pump, and the valve body 1 where the second cavity 12 is located is provided with an air outlet 121 for communicating with the massage airbag. The first cavity 11 and the second cavity 12 can be the air inlet and outlet cavities of the valve body 1. The shapes of the first cavity 11 and the second cavity 12 can be cylindrical, rectangular, or other irregular shapes. The shape of the cavity can be designed according to the valve body 1.

[0033] Please refer to Figure 2 An independent columnar structure can be formed at the air outlet 121 to facilitate communication with the pipeline, thereby providing a stable pipeline communication effect; a corresponding protrusion structure or a stepped groove structure can be provided at the air inlet 111 to facilitate the installation of corresponding seals, thereby communicating with the pipeline of the air pump.

[0034] Please refer to Figure 1 A gas channel 13 connecting the first cavity 11 and the second cavity 12 is formed in the valve body 1. The gas channel 13 is columnar and passes through the valve body 1 where the first cavity 11 and the second cavity 12 are located along the axial direction of the gas channel 13 to form a mounting hole 14 and an exhaust hole 15 respectively.

[0035] Please refer to Figure 1The gas channel 13 can be a circular column, a prismatic column, or an irregular column. The mounting hole 14 and the exhaust hole 15 are both through-holes extending through a portion of the wall of the valve body 1. The gas channel 13, mounting hole 14, and exhaust hole 15 can be coaxially arranged. The cross-section of the gas channel 13 can be the same size and shape as the exhaust hole 15, or different. The cross-section of the mounting hole 14 can be larger than that of the gas channel 13.

[0036] Please refer to Figure 1 The seal 2 is sealed in the mounting hole 14. The seal 2 can be a sealing element with an annular cross-section, which can fill the gap between components through the annular profile to prevent gas or liquid leakage, or it can be a non-annular shape, achieving circuit connectivity through an opening; the seal 2 can be made of an elastic material, such as silicone or rubber.

[0037] Please refer to Figure 1 The piezoelectric ceramic device 3 is arranged in the gas channel 13 along the direction of the gas channel 13, and a gap is set between the piezoelectric ceramic device 3 and the gas channel 13. One end of the piezoelectric ceramic device 3 is fixedly set on the sealing member 2, and the other end of the piezoelectric ceramic device 3 is set at the connection between the gas channel 13 and the second cavity 12. The end of the piezoelectric ceramic device 3 close to the sealing member 2 is connected to the power supply circuit.

[0038] Please refer to Figure 1 The piezoelectric ceramic device 3 slides axially in the gas channel 13. One end of the piezoelectric ceramic device 3 can extend outside the seal 2 or be located inside the seal 2. The moving stroke of the piezoelectric ceramic device 3 should not leave the seal 2 to ensure the sealing effect of the first cavity 11.

[0039] Please refer to Figure 1 The cross-sectional shapes of the piezoelectric ceramic device 3 and the gas channel 13 may be the same or different, and the gap between the piezoelectric ceramic device 3 and the gas channel 13 may facilitate the flow of gas from the first cavity 11 to the second cavity 12 .

[0040] For example, the valve body 1 may be made of plastic, metal or ceramic, and the piezoelectric ceramic device 3 may be made of ceramic, and the two materials may be the same or different.

[0041] The piezoelectric ceramic device 3 may include a piezoelectric ceramic sheet. Utilizing the piezoelectric effect, when an alternating voltage is applied to the piezoelectric ceramic sheet, it undergoes periodic deformation (elongation or contraction). This deformation is transmitted to the sealing rubber column 4 through a mechanical structure, driving it to slide along the axis of the gas channel 13. The piezoelectric ceramic sheet can be connected to an external pin electrode to apply an electrical signal.

[0042] The deformed end of the piezoelectric ceramic sheet is fixed to the top of the piezoelectric ceramic device 3 through a rigid connector (such as a metal push rod), forming a transmission connection structure of "electrode-push rod-piezoelectric ceramic device 3"; when power is applied, the piezoelectric ceramic sheet bends upward, pushing the piezoelectric ceramic device 3 into the gas channel 13 → the sealing rubber column 4 moves away from the outlet of the gas channel 13, and the first part of the sealing rubber separates from the wall of the gas channel 13 → the gas flows from the first cavity 11 through the gas channel 13 into the second cavity 12, and the airbag inflates. When discharging, the ceramic sheet returns to being straight, and the piezoelectric ceramic device 3 retreats under the elastic action of the ceramic sheet itself → the first part of the sealing rubber on the sealing rubber column 4 abuts against the gas channel 13, the seal is cut off, and the airbag stops inflating.

[0043] Please refer to Figure 1 The sealing rubber column 4 is fixedly arranged at the end of the piezoelectric ceramic device 3. The sealing rubber column 4 is located in the second cavity 12. Along the direction of the gas channel 13, the exhaust hole 15 and the gas channel 13 are completely projected onto the sealing rubber column 4, and along the direction of the gas channel 13, the distance between the exhaust hole 15 and the gas channel 13 is greater than the length of the sealing rubber column 4.

[0044] The sealing rubber column 4 is fixed at the end of the piezoelectric ceramic device 3, located in the second cavity 12, and moves with the piezoelectric ceramic device 3. The sealing rubber column 4 and the piezoelectric ceramic device 3 can be bonded, bolted, clamped or integrally formed. The materials of the sealing rubber column 4 and the piezoelectric ceramic device 3 can be the same or different.

[0045] The sealing rubber column 4 includes a first portion and a second portion. The first portion is used to abut against the gas channel 13 to seal the gas channel 13 , and the second portion is used to abut against the exhaust hole 15 to seal the exhaust hole 15 .

[0046] The deformation of the sealing rubber column 4 should be smaller than the difference between the distance between the exhaust hole 15 and the gas channel 13 and the length of the sealing rubber column 4 in the natural state, so that after the sealing rubber column 4 is restored, one of the exhaust hole 15 and the gas channel 13 can smoothly flow gas.

[0047] Please refer to Figure 1The first cavity 11 in this application is connected to the air pump through the air inlet 111, and the second cavity 12 is connected to the massage airbag through the air outlet 121. The gas channel 13 runs through the two to form an airflow path. The columnar structure of the gas channel 13 ensures that the airflow direction is stable, and turbulence is prevented from affecting the massage air pressure accuracy; the seal 2 is installed in the mounting hole 14 to form a seal with the piezoelectric ceramic device 3, which can prevent gas from leaking from the mounting hole 14 and improve air tightness. At the same time, it can fix one end of the piezoelectric ceramic device 3, and when the piezoelectric ceramic device 3 is deformed, it can drive the sealing rubber column 4 to move; the sealing rubber column 4 is located in the second cavity 12, and the first part of the sealing rubber column 4 can seal the gas channel 13, and the second part can seal the exhaust hole 15.

[0048] Please refer to Figure 1 Along the direction of the gas channel 13, the projections of the exhaust hole 15 and the gas channel 13 are completely located in the sealing rubber column 4, and the distance between them is greater than the length of the sealing rubber column 4, forming a "dislocation seal". When the sealing rubber column 4 moves, it can block the gas channel 13 or the exhaust hole 15 respectively, thereby realizing the precise switching of air intake and exhaust; when the sealing rubber column 4 switches the mode of sealing the exhaust hole 15 and the gas channel 13, the noise is small or even no noise, thereby improving the massage comfort.

[0049] Please refer to Figure 1 In some examples, the sealing rubber column 4 is made of rubber. The sealing rubber column 4 is made of rubber, and due to its high elasticity, it can closely adhere to the wall of the gas passage 13 or the exhaust hole 15 when it abuts the gas passage 13 or the exhaust hole 15, thereby compensating for the gap caused by processing errors, improving sealing reliability, and reducing gas leakage. At the same time, the cushioning properties of rubber can reduce the noise and wear caused by the collision between the sealing rubber column 4 and the valve body 1.

[0050] For example, the sealing rubber column 4 and the piezoelectric ceramic device 3 can be connected by embedded injection molding. For example, the end of the piezoelectric ceramic device 3 is pre-processed into an "insert" with grooves, threads or barbs. When the sealing rubber column 4 is injection molded, the insert is placed in the mold; the rubber raw material is melted under high temperature and high pressure to fill the mold, and after cooling, it is tightly combined with the insert to form an integrated structure.

[0051] Alternatively, other connection methods may be used, such as a mechanical slot connection or a threaded connection.

[0052] Please refer to Figure 1 In some examples, two second cavities 12 are provided, and the two second cavities 12 are connected to the same first cavity 11 through two gas passages 13. The two second cavities 12 are connected to the same first cavity 11 through their respective gas passages 13, which can achieve a "one-in, two-out" airflow distribution effect, reduce the volume of the valve body 1, avoid the complex layout of multiple independent valve bodies 1, and contribute to a miniaturized design.

[0053] Please refer to Figure 1 In some examples, the two second cavities 12 can be exactly the same, and the two second cavities 12 can be located in the same valve body 1. At this time, the two adjacent second cavities 12 can be blocked and separated by the plate structure of the valve body 1 itself to prevent the two second cavities 12 from affecting each other.

[0054] For example, in order to improve space utilization, the two second cavities 12 may be adjacent to each other, and the two second cavities 12 may be located on the same side of the first cavity 11 . In this case, the first cavity 11 may be in a plate shape.

[0055] Please refer to Figure 3 In some examples, along the distribution direction perpendicular to the two second cavities 12 and along the direction perpendicular to the gas channel 13, a plurality of piezoelectric ceramic valves for pneumatic massage are provided, and a plurality of piezoelectric ceramic valves for pneumatic massage form a piezoelectric ceramic valve group 5.

[0056] Multiple valves are arranged in a distribution direction perpendicular to the second cavity 12 to form a piezoelectric ceramic valve group 5, which can correspond to the array layout of multiple massage airbags, realize synchronous or partitioned control of large massage areas, and improve the uniformity and coverage of the massage experience; each valve independently controls the corresponding airbag, and the vehicle's electronic control system can realize differentiated adjustment of massage intensity and frequency in different areas to meet personalized massage needs.

[0057] In some examples, the distribution directions of the two second cavities 12 and the direction of the gas channel 13 may be perpendicular to each other or may have an angle therebetween.

[0058] Please refer to Figure 3 The number of piezoelectric ceramic valves for pneumatic massage can be adjusted according to the number of massage airbags, so that the piezoelectric ceramic valve assembly 5 herein serves as an integrated control valve assembly for the entire massage airbag. For example, the number of piezoelectric ceramic valves for pneumatic massage within the piezoelectric ceramic valve assembly 5 can be 3, 5, 6, 8, 12, or any other number. Different piezoelectric ceramic valves for pneumatic massage can be secured by the same bracket and positioned adjacent to each other, making the overall piezoelectric ceramic valve assembly 5 smaller and more space-efficient.

[0059] Please refer to Figure 4 In some examples, the multiple first cavities 11 in the piezoelectric ceramic valve group 5 are interconnected, the multiple second cavities 12 in the piezoelectric ceramic valve group 5 are independent of each other, and the piezoelectric ceramic valve group 5 shares an air inlet 111.

[0060] Multiple first cavities 11 in the piezoelectric ceramic valve group 5 are connected and share an air inlet 111. Only one air pump is needed to supply air to all valves, reducing the number of air pumps and the complexity of pipelines, and reducing equipment costs and energy consumption; at the same time, the unified air intake pressure facilitates overall air pressure control.

[0061] For example, at this time, the valve bodies 1 of the multiple piezoelectric ceramic valves for pneumatic massage in the piezoelectric ceramic valve group 5 need to be integrally formed to make the valve bodies 1 more airtight as a whole and avoid air leakage.

[0062] At this time, one piezoelectric ceramic valve group 5 can be set in one seat, or two can be set.

[0063] Please refer to Figure 1 In some examples, the opening of the gas channel 13 at the second cavity 12 is set to a plane, and a plane that cooperates with the gas channel 13 is formed on the sealing rubber column 4; the exhaust hole 15 is set to a plane at the opening of the second cavity 12, and a plane that cooperates with the exhaust hole 15 is formed on the sealing rubber column 4.

[0064] Please refer to Figure 5 In some other examples, the gas channel 13 is provided with a chamfer 16 at the opening of the second cavity 12, and an annular inclined surface is formed on the sealing rubber column 4 to match the chamfer 16 of the gas channel 13; the exhaust hole 15 is provided with a chamfer 16 at the opening of the second cavity 12, and an annular inclined surface is formed on the sealing rubber column 4 to match the chamfer 16 of the exhaust hole 15.

[0065] The chamfer 16 design at the opening of the gas channel 13 and the exhaust hole 15 reduces turbulent loss when the air flow enters or exits, improves the gas flow efficiency, makes the airbag inflation and deflation process smoother, and shortens the response time; the annular bevel on the sealing rubber column 4 can precisely match the chamfer 16 of the valve body 1 to form a line contact seal, effectively preventing gas leakage from the gap.

[0066] In this example, the chamfers 16 on the gas channel 13 and the exhaust hole 15 can be 30°, 45° or 60°, and the annular bevel can be a fitting surface with the same angle as the chamfer 16 to facilitate fitting, or it can also be an arc-shaped surface, that is, the sealing effect between the annular bevel and the gas channel 13 or the exhaust hole 15 is enhanced by the deformation of the rubber material of the annular bevel.

[0067] Please refer back to Figure 1 In some examples, the wall of the gas channel 13 extends into the second cavity 12 , and a avoidance space 17 is formed in the gas channel 13 away from the gas outlet 121 .

[0068] The wall of the gas channel 13 extends into the second cavity 12 to form an avoidance space 17, which provides sufficient space for the movement of the sealing rubber column 4, avoids the sealing rubber column 4 from colliding or getting stuck with the wall of the valve body 1 during reciprocating motion, ensures smooth sliding of the piezoelectric ceramic device 3, and extends its service life; and the avoidance space 17 can serve as an airflow buffer area to reduce the blocking interference of the sealing rubber column 4 on the airflow when it moves.

[0069] In some examples, the wall of the gas channel 13 may be cylindrical or conical, and may be located in the middle of the second cavity 12 or in a portion of the second cavity 12 away from the gas outlet 121 .

[0070] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0071] The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A piezoelectric ceramic valve for pneumatic massage, provided on a massage airbag, for connecting an air pump and the massage airbag, characterized in that: include: The valve body has a first cavity and a second cavity. The valve body where the first cavity is located is provided with an air inlet hole for communicating with the air pump, and the valve body where the second cavity is located is provided with an air outlet hole for communicating with the massage airbag. A gas channel connecting the first cavity and the second cavity is formed in the valve body. The gas channel is cylindrical and passes through the valve body where the first cavity and the second cavity are located respectively along the axis of the gas channel to form a mounting hole and an exhaust hole, respectively. a sealing member, sealingly disposed in the mounting hole; a piezoelectric ceramic device disposed in the gas passage along the direction of the gas passage, with a gap provided between the piezoelectric ceramic device and the gas passage, one end of the piezoelectric ceramic device being fixedly disposed on the sealing member, the other end of the piezoelectric ceramic device being disposed at a junction of the gas passage and the second cavity, and an end of the piezoelectric ceramic device proximal to the sealing member being connected to a power supply circuit; a sealing rubber column formed at an end of the piezoelectric ceramic device, the sealing rubber column being located in the second cavity, the exhaust hole and the gas channel being completely projected onto the sealing rubber column along the direction of the gas channel, and a distance between the exhaust hole and the gas channel being greater than a length of the sealing rubber column along the direction of the gas channel; The sealing rubber column includes a first portion and a second portion, wherein the first portion is used to abut against the gas channel to seal the gas channel, and the second portion is used to abut against the exhaust hole to seal the exhaust hole.

2. The piezoelectric ceramic valve for pneumatic massage according to claim 1, characterized in that: The sealing rubber column is made of rubber.

3. The piezoelectric ceramic valve for pneumatic massage according to claim 1, characterized in that: There are two second cavities, and the two second cavities are connected to the same first cavity through the two gas channels.

4. The piezoelectric ceramic valve for pneumatic massage according to claim 3, characterized in that: Along the distribution direction perpendicular to the two second cavities and along the direction perpendicular to the gas channel, the piezoelectric ceramic valves for pneumatic massage are arranged in plurality, and the plurality of piezoelectric ceramic valves for pneumatic massage form a piezoelectric ceramic valve group.

5. The piezoelectric ceramic valve for pneumatic massage according to claim 4, characterized in that: The plurality of first cavities in the piezoelectric ceramic valve group are interconnected, the plurality of second cavities in the piezoelectric ceramic valve group are independent of each other, and the piezoelectric ceramic valve group shares one air inlet hole.

6. The piezoelectric ceramic valve for pneumatic massage according to claim 1, characterized in that: The wall plate of the gas channel extends into the second cavity, and an avoidance space is formed in the direction of the gas channel away from the gas outlet.

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