Gas circuit quick connection assembly and pneumatic comfort system

Abstract

The invention provides an air path quick-connection assembly and a pneumatic comfort system.The air path quick-connection assembly comprises a first connector and a second connector which are matched with each other in an inserted mode, a stopping piece is arranged in an inserted connection groove of the first connector, and the stopping piece seals a first air path in the first connector when an inserted connection part of the second connector is not inserted into the inserted connection groove; when the inserting part of the second connector is inserted into the inserting groove, the inserting part can be opened, so that the first air channel of the first connector is communicated with the second air channel of the second connector, and the functions that ventilation is conducted during inserting matching, and continuous ventilation of the first connector is stopped when inserting is cut off are achieved; the requirement for supplying air through the automobile body air source is met, and air source waste can be effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of quick-connect pneumatic circuit technology, and more particularly to a quick-connect pneumatic circuit assembly and a pneumatic comfort system. Background Technology

[0002] Pneumatic comfort systems typically consist of an air source unit, valve modules, and air bags. The compressed air supplied by the air source unit is controlled by the valve modules to precisely inflate and deflate the air bags. In a centralized layout using the vehicle's air source, the main air pipe is led from the air source into the cabin, and then connected to the valve modules of each seat via branch air pipes. Finally, the valve modules drive the air bags on the corresponding seats through the air pipes.

[0003] To facilitate system installation and subsequent maintenance, current technologies commonly employ various pneumatic quick-connect components at pipe joints. Specifically, a specific air source connector assembly connects and disconnects the main air pipe from the main wiring pipes serving each seat. The use of quick-connect components undoubtedly greatly improves the efficiency of air pipe laying and system assembly. However, in practice, it has been found that due to factors such as continuous vehicle vibration, component aging, and frequent plugging and unplugging, existing quick-connect components generally suffer from inherent defects such as easy loosening of connections and insufficient connection stability. This directly leads to air leakage during system operation, resulting in insufficient air pressure supplied to the air bags, reducing the performance and response speed of the pneumatic comfort system, and affecting the user experience. Furthermore, the connection between the main air pipe and the air wiring pipes serving each seat via a specific air source connector assembly should allow airflow when the assembly is plugged in and automatically close when unplugged to avoid wasting air and reduce the potential for shortening the lifespan of the air source device.

[0004] Therefore, how to design a quick-connect assembly for the air circuit that provides a more stable connection, better sealing, and effectively prevents air source waste has become a pressing technical problem in this field. Summary of the Invention

[0005] To address the aforementioned issues, this invention proposes a quick-connect pneumatic circuit assembly, which overcomes the inherent defects of existing quick-connect assemblies, such as easy loosening of connection parts and insufficient connection stability, and meets the usage connection requirements of the pneumatic comfort system and the vehicle's air source.

[0006] In a first aspect, the present invention provides a quick-connect pneumatic circuit assembly, comprising: The first connector is provided with a plug slot and a first air passage communicating with the plug slot; A stop is provided in the insertion slot and seals the first air passage; The second connector is provided with a plug portion adapted to the plug slot and a second air passage extending to the plug portion; when the second connector is plugged in with the first connector, the stop member is opened so that the second air passage is connected to the first air passage.

[0007] In some embodiments, a stop buckle is also included; the stop buckle is snapped and fixedly installed in the insertion slot; The stop member is disposed in the insertion groove by the stop buckle; the stop buckle is provided with a vent hole connecting the insertion groove and the first air passage, and the stop member closes the vent hole.

[0008] In some embodiments, the stop includes a mounting ring, at least two resilient connecting arms, and a sealing valve; the mounting ring is connected to the sealing valve via the at least two resilient connecting arms. The mounting ring is fixed to the inner wall of the insertion groove by the stop buckle; the stop buckle is provided with a movable groove that connects the first air passage and the vent hole, and the sealing valve is connected to the movable groove by the at least two elastic connecting arms and seals the vent hole.

[0009] In some embodiments, the inner wall of the movable groove is provided with guide ribs, and the sealing valve can extend and retract along the guide ribs within the movable groove to close or open the vent hole, and an air guide groove is formed between two adjacent guide ribs; the guide ribs extend from the end face of the stop buckle in a direction away from the vent hole to form a limiting step that restricts the mounting ring.

[0010] In some embodiments, the opening of the second airway extends to the side of the insertion portion.

[0011] In some embodiments, the system further includes a positioning display; the positioning display includes a sensor, a control element, and an indicator element, wherein the sensor and the indicator element are connected to the control element. The second connector has a trigger at its insertion part. When the second connector is properly inserted into the first connector, the trigger activates the sensor to generate a sensing signal. The sensing signal is received and processed by the control unit, which then instructs the indicator to issue an indication signal.

[0012] In some embodiments, the sensing element includes a piezoelectric thin film.

[0013] In some embodiments, the trigger includes a sealing ring fitted onto the insertion portion.

[0014] In some embodiments, the first connector is provided with an elastic snap-fit ​​arm along the first outer side in the circumferential direction. The elastic snap-fit ​​arm has an extension direction that is the same as the docking direction of the insertion groove, and the elastic snap-fit ​​arm is provided with a snap-fit ​​protrusion and a limiting protrusion in sequence along the docking direction of the insertion groove. The second connector is provided with a positioning locking beam on the first outer side along the circumferential direction. When the second connector is inserted into the first connector, the locking protrusion passes through the positioning locking beam and locks into the positioning locking beam when inserted into place. Pressing the elastic locking arm can release the locking protrusion from the positioning locking beam.

[0015] In some embodiments, along the second inner side of the circumferential direction, the inner wall of the insertion groove is provided with a limiting arc groove; along the second outer side of the circumferential direction, the insertion part is provided with an arc-shaped protrusion that corresponds to and matches the limiting arc groove. When the second connector is inserted into the first connector, the arc-shaped protrusion is positioned within the limiting arc groove.

[0016] In a second aspect, the present invention provides a pneumatic comfort system, including the aforementioned quick-connect pneumatic circuit assembly.

[0017] The quick-connect pneumatic circuit assembly and pneumatic comfort system of the present invention have the following effects: The quick-connect air circuit assembly of the present invention includes a first connector and a second connector that are mutually pluggable and compatible. A stop member is provided in the plug groove of the first connector. The stop member closes the first air passage in the first connector when the plug part of the second connector is not inserted into the plug groove, and can be opened by the plug part when the plug part of the second connector is inserted into the plug groove, so that the first air passage of the first connector and the second air passage of the second connector are connected. This realizes the function of connecting and venting when plugged in and stopping the first connector from continuing to venting when plugged in, thus meeting the needs of using the vehicle body air source for air supply and effectively preventing air source waste.

[0018] In the quick-connect assembly for the gas path of the present invention, the first connector and the second connector can be fixed on the first side of the circumference by a snap-fit ​​structure to prevent the first connector and the second connector from falling off during snap-fit, while also facilitating disassembly and assembly. Moreover, the first connector and the second connector can be positioned on the second side of the circumference by a positioning structure, so that the first connector and the second connector are subjected to balanced forces on the first side and the second side during snap-fit, thereby improving the connection stability and sealing performance of the first connector and the second connector and preventing air leakage.

[0019] The pneumatic comfort system of the present invention uses the above-mentioned quick-connect air circuit assembly to connect the air tubes, which helps to improve the assembly and disassembly efficiency of the pneumatic comfort system.

[0020] The above description is merely an overview of the technical solutions of the embodiments of the present invention. In order to better understand the technical means of the embodiments of the present invention and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0021] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the structure of the quick-connect pneumatic circuit assembly according to an embodiment of the present invention; Figure 2 This is an exploded view of the quick-connect pneumatic assembly according to an embodiment of the present invention; Figure 3 This is an exploded cross-sectional view of the gas path quick-connect assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the airflow of the quick-connect assembly of the air path according to an embodiment of the present invention; Figure 5 This is a second cross-sectional view of the quick-connect pneumatic assembly according to an embodiment of the present invention; Figure 6 Embodiments of the present invention Figure 5 The attached diagram is an enlarged view marked A.

[0022] Figure label: 10. First connector; 11. Insertion groove; 12. Flexible snap-fit ​​arm; 121. Snap-fit ​​protrusion; 122. Limiting protrusion; 13. First snap-fit ​​groove; 14. First air passage; 15. Limiting arc groove; 20. Second connector; 21. Insertion part; 22. Opening; 23. Annular groove; 24. Trigger element; 25. Positioning locking beam; 26. Positioning hole; 27. Second air passage; 28. Arc-shaped protrusion; 31. Stop buckle; 311. Guide rib; 312. Air guide groove; 313. First buckle part; 314. Movable groove; 315. Vent hole; 316. Limiting step; 32. Stop component; 321. Mounting ring; 322. Elastic connecting arm; 323. Sealing valve; 33. Sensing component; 34. Control component; 35. Indicating component. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of the present invention can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the spirit of the present invention and should not be regarded as undue limitations on the present invention.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the specific technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings of the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the embodiments of the present invention, 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the same feature. In the description of the embodiments of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0026] Furthermore, in the embodiments of the present invention, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0027] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0028] In embodiments of the present invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0029] In embodiments of the present invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in embodiments of the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0030] Figures 1-4The present invention illustrates a quick-connect assembly for a pneumatic circuit, comprising a first connector 10, a stop 32, and a second connector 20. The first connector 10 is provided with a insertion groove 11 and a first air passage 14 communicating with the insertion groove 11. The stop 32 is disposed within the insertion groove 11 and closes the first air passage 14. The second connector 20 is provided with an insertion portion 21 adapted to the insertion groove 11 and a second air passage 27 extending from the insertion portion 21 to the insertion portion 21. When the second connector 20 is inserted into the insertion groove 11 of the first connector 10 via the insertion portion 21, the stop 32 is opened, so that the second air passage 27 is connected to the first air passage 14.

[0031] In this embodiment of the invention, the insertion groove 11 refers to a recessed structure disposed inside the first connector 10 to accommodate the insertion part 21. Specifically, it can be implemented using a stepped cylindrical cavity, with its axial length slightly greater than the length of the insertion part 21 to ensure complete insertion. The first air passage 14 refers to a fluid passage penetrating the first connector 10. Specifically, it can be implemented using a central through-hole structure to establish a gas transmission path, such as... Figure 4 As shown. The stop 32 refers to the sealing element disposed in the insertion groove 11, which can be implemented by an elastic sealing diaphragm. Under normal conditions, it covers the outlet of the first air passage 14 to form a closed ventilation state. The insertion part 21 of the second connector 20 refers to the protruding structure that matches the shape of the insertion groove 11. Specifically, it can be implemented by a cylinder with a guide bevel. When inserted, it pushes the stop 32 to move through physical contact, so that the first air passage 14 is opened.

[0032] Specifically, when the second connector 20 is not inserted, the stop 32 completely covers the inlet of the first air passage 14 under its own elastic force, blocking the gas flow. During pipeline connection, the insertion part 21 of the second connector 20 is inserted axially along the insertion groove 11, and its end contacts and pushes the sealing diaphragm to deform and displace. As it is inserted into place, the sealing diaphragm completely disengages from the outlet of the first air passage 14. At this time, the second air passage 27 forms a gas channel communicating with the first air passage 14 through the opening 22 on the side of the insertion part 21. The tight fit between the insertion part 21 and the insertion groove 11 forms a radial constraint, preventing lateral displacement of the connector under vibration conditions.

[0033] Compared with existing technologies, the quick-connect assembly for the air passage in this invention relies on an external sealing ring for static sealing, which is prone to gaps due to component wear under dynamic operating conditions. This solution achieves dynamic self-sealing through a built-in elastic sealing diaphragm. The sealing structure is forcibly opened when the insertion part 21 is inserted and automatically resets to close the air passage when it is pulled out. Simultaneously, the axial fit between the insertion groove 11 and the insertion part 21 enhances connection stability and is more resistant to loosening caused by vibration compared to traditional snap-fit ​​connections.

[0034] Through the above technical solution, this invention effectively solves the problems of air leakage and air source waste at pipeline connections. The elastic sealing diaphragm automatically opens and closes during insertion and removal, ensuring a completely sealed air passage when not connected. The dual-limiting design of the insertion structure enhances connection stability and prevents accidental disconnection due to vehicle vibration. This solution maintains the advantage of rapid insertion while significantly improving the reliability of air passage sealing and the stability of system operation.

[0035] In some embodiments, the quick-connect assembly for the air passage further includes a stop buckle 31, which is snapped and fixedly installed in the insertion groove 11. A stop member 32 is disposed in the insertion groove 11 through the stop buckle 31. The stop buckle 31 is provided with a vent hole 315 that connects the insertion groove 11 and the first air passage 14. The stop member 32 is disposed on the stop buckle 31 and closes the vent hole 315.

[0036] In this embodiment of the invention, the stop buckle 31 refers to the snap-fit ​​structure used to fix the stop member 32. Specifically, it can be implemented using a ring-shaped metal part or an engineering plastic part with elastic claws. Its snap-fit ​​fixing method can prevent loosening caused by vibration, while providing room for movement of the sealing valve 323. The vent hole 315 refers to the channel passing through the stop buckle 31. Specifically, it can be implemented using a circular through hole with a diameter ranging from 2 mm to 5 mm. Its function is to allow airflow during insertion. The stop member 32 sealing the vent hole 315 means that the vent hole 315 is covered by an elastic sealing structure. Specifically, it can be implemented using a combination structure of silicone sealing valve 323 and elastic connecting arm 322. Its elastic deformation ability can be pushed open during insertion to achieve conduction.

[0037] It should be noted that the stop buckle 31 and the insertion groove 11 can also be interlocked and fixed by a snap-fit ​​structure to ensure the connection stability between the stop buckle 31 and the first connector 10. Specifically, the stop buckle 31 may be provided with a first snap-fit ​​part 313, and the side wall of the insertion groove 11 may be provided with a first snap-fit ​​groove 13. When the stop buckle 31 is inserted into the insertion groove 11, it is fixed by snapping into the first snap-fit ​​groove 13 through the first snap-fit ​​part 313.

[0038] Specifically, the stop clip 31 is snapped into the insertion slot 11 to form a stable installation base. The vent 315 axially penetrates the stop clip 31, creating a potential connection between the insertion slot 11 and the first air passage 14. When the second connector 20 is not inserted, the sealing valve 323 of the stop 32 is pressed tightly against the vent 315 under the pre-tightening force of the elastic connecting arm 322, blocking the airflow path. During insertion, the insertion portion 21 of the second connector 20 pushes the sealing valve 323 along the movable groove 314, exposing the vent 315 and thus enabling airflow. This structure achieves automatic opening and closing of the air passage through mechanical linkage, avoiding the risk of sealing failure associated with traditional manual valve operation.

[0039] Through the above technical solution, the present invention solves the air leakage problem caused by misalignment or wear of the seal in traditional quick-connect assemblies, and enhances the vibration resistance of the stop 32 through the snap-fit ​​fixing method. The directional movement of the sealing valve 323 during the insertion process avoids sealing failure caused by tilted insertion, while the design of the air guide groove 312 ensures smooth airflow when the device is open.

[0040] In some embodiments, the stop member 32 includes a mounting ring 321, at least two elastic connecting arms 322, and a sealing valve 323. The mounting ring 321 is connected to the sealing valve 323 through the at least two elastic connecting arms 322. The mounting ring 321 is fixed to the inner wall of the insertion groove 11 by a stop buckle 31. The stop buckle 31 is provided with a movable groove 314 that connects the first air passage 14 and the vent 315. The sealing valve 323 is connected to the movable groove 314 through the at least two elastic connecting arms 322 and seals the vent 315.

[0041] In this embodiment of the invention, the mounting ring 321 refers to an annular structure for supporting the elastic connecting arm 322. It can be made of metal or plastic and its outer diameter forms an interference fit with the inner wall of the insertion groove 11 for fixation. The elastic connecting arm 322 refers to an elastic component connecting the mounting ring 321 and the sealing valve 323. It can be formed by bending a spring steel sheet or an elastic plastic sheet, capable of deforming under force and returning to its original shape after the external force disappears. The sealing valve 323 refers to a flexible component for sealing the vent 315. It can be molded from rubber or silicone material and can displace under pressure to change the opening and closing state of the vent 315. The movable groove 314 refers to a cavity structure located inside the stop buckle 31. It can be integrally formed by injection molding and is used to accommodate the expansion and contraction of the sealing valve 323 and guide the airflow direction.

[0042] In some embodiments, the mounting ring 321, the elastic connecting arm 322, and the sealing valve 323 may be integrally injection molded components.

[0043] In addition, a stepped hole is provided in the insertion groove 11. The mounting ring 321 is limited by the end face of the stop buckle 31 to be located on the step of the stepped hole. When the stop buckle 31 is engaged and fixed in the insertion groove 11, the mounting ring 321 is squeezed and fixed between the end face of the stop buckle 31 and the stepped hole.

[0044] Specifically, when the second connector 20 is not inserted, the sealing valve 323, under the pre-tightening force of the elastic connecting arm 322, adheres tightly to the edge of the vent 315, forming a sealing interface to block the communication between the first air passage 14 and the insertion groove 11. When the insertion part 21 of the second connector 20 is inserted into the insertion groove 11, the end face of the insertion part 21 contacts the sealing valve 323 and applies an axial thrust, forcing the sealing valve 323 to move axially along the movable groove 314. At this time, the elastic connecting arm 322 bends and deforms, the vent 315 is opened, and the first air passage 14 and the second air passage 27 are connected. After the insertion part 21 is fully inserted, the sealing valve 323 moves away from the vent 315 and into the movable groove 314, and the air guide groove 312 and the vent 315 form a communicating air passage. When the second connector 20 is pulled out, the elastic restoring force of the elastic connecting arm 322 drives the sealing valve 323 to move in the opposite direction, resealing the vent 315. During this process, the guide rib 311 constrains the movement trajectory of the sealing valve 323 to avoid sealing failure caused by skewing, while the limiting step 316 limits the axial displacement range of the mounting ring 321.

[0045] Through the above technical solution, the present invention effectively solves the air leakage problem caused by misalignment or wear of the sealing component during the insertion and removal of the quick-connect assembly, ensuring reliable airflow path conduction in the inserted state and complete sealing in the disconnected state. The synergistic effect of the elastic connecting arm 322 and the sealing valve 323 significantly improves the adaptive compensation capability of the sealing interface, maintaining a stable sealing effect even under vehicle vibration conditions. At the same time, the guide structure in the movable groove 314 avoids the jamming phenomenon of the sealing valve 323 due to uneven force, ensuring the operational reliability of the quick-connect assembly during long-term use.

[0046] In some embodiments, the inner wall of the movable groove 314 is provided with guide ribs 311, and the sealing valve 323 can extend and retract within the movable groove 314 along the guide ribs 311 to close or open the vent hole 315, and an air guide groove 312 is formed between two adjacent guide ribs 311. The guide ribs 311 extend from the end face of the stop buckle 31 in a direction away from the vent hole 315 to form a limiting step 316 for limiting the mounting ring 321.

[0047] In this embodiment of the invention, the guide rib 311 refers to the protruding structure provided on the inner wall of the movable groove 314, which can be implemented by injection molding of plastic ribs, and is used to guide the sealing valve 323 to move along a predetermined path to avoid deflection or jamming.

[0048] The air guide groove 312 refers to the gap between adjacent guide ribs 311. It can be implemented by adopting a V-shaped or U-shaped cross-section structure to form a gas flow channel when the sealing valve 323 is opened, so as to maintain the smooth flow of air.

[0049] The limiting step 316 refers to the blocking structure formed by the guide rib 311 extending out of the end face of the stop buckle 31. Specifically, it is achieved by multiple local protrusions on the end faces of the guide ribs 311 extending out of the stop buckle 31. It is used to limit the axial displacement of the mounting ring 321 and ensure the preload of the elastic connecting arm 322.

[0050] Specifically, during the insertion of the second connector 20 into the first connector 10, the insertion part 21 pushes the sealing valve 323 along the guide rib 311 into the movable groove 314, gradually opening the vent 315. The linear guiding effect of the guide rib 311 keeps the sealing valve 323 on its axial movement trajectory, avoiding sealing failure due to deflection. The air guide groove 312 serves as a continuous airflow channel when the sealing valve 323 opens the vent 315, ensuring rapid connection between the first air passage 14 and the second air passage 27. When the second connector 20 is pulled out, the elastic connecting arm 322 drives the sealing valve 323 to reset along the guide rib 311 until the sealing valve 323 covers the vent 315 again. At this time, the sealing valve 323 completely seals the vent 315, thus sealing the first air passage 14.

[0051] Through the above technical solution, the present invention effectively solves the problem of sealing failure of the quick-connect air circuit assembly under vibration environment, ensuring immediate sealing when the air circuit is quickly opened and closed during the insertion process. The combined design of the guide rib 311 and the air guide groove 312 optimizes airflow efficiency while maintaining airtightness, while the limiting step 316 enhances the impact resistance of the overall structure and extends the service life of the assembly.

[0052] In some embodiments, the opening 22 of the second air passage 27 extends into the side of the insertion portion 21. In this embodiment, the second air passage 27 refers to the gas flow channel inside the second connector 20, which is used to form a communication with the first air passage 14 after insertion. The opening 22 extending into the side of the insertion portion 21 means that the air outlet of the air passage is a notch provided in the side wall of the insertion portion 21 rather than the end, which can be achieved by processing a radial through hole or through groove in the side wall of the insertion portion 21. This design avoids the defect that the end of the insertion portion 21 of the second connector 20 abuts against the sealing valve 323 during insertion, and the second air passage 27 cannot communicate with the first air passage 14, ensuring that the second air passage 27 and the first air passage 14 can be effectively connected during insertion.

[0053] Specifically, during the insertion process, when the insertion part 21 of the second connector 20 is inserted into the insertion slot 11 of the first connector 10, the opening 22 on the side of the insertion part 21 gradually connects with the vent 315 that has been opened on the stop buckle 31. Since the opening 22 is located on the side, after insertion, the second air passage 27 forms a stable airflow channel with the first air passage 14 through the side opening 22, ensuring smooth airflow and reliable sealing.

[0054] Through the above technical solution, the present invention effectively reduces the risk of the insertion part 21 failing to seal with the sealing valve 323 during the insertion process, thus preventing the connection of the first air passage 14 and the second air passage 27. Meanwhile, the lateral opening 22 design simplifies the manufacturing process, improves component assembly efficiency, and ensures a more stable and reliable air passage connection, thereby enhancing the overall performance of the pneumatic comfort system.

[0055] In some embodiments, a positioning display is also included, which includes a sensor 33, a control 34, and an indicator 35. The sensor 33 and the indicator 35 are connected to the control 34. The insertion portion 21 of the second connector 20 is provided with a trigger 24. When the second connector 20 is adapted to be inserted into the first connector 10, the trigger 24 triggers the sensor 33 to generate a sensing signal. The sensing signal is received and processed by the control 34, which then instructs the indicator 35 to issue an indicator signal.

[0056] In this embodiment of the invention, the sensing element 33 refers to an element capable of detecting changes in physical contact or pressure. Specifically, it can be implemented using a piezoelectric film or a thin-film contact sensor. The piezoelectric film generates an electric charge signal when subjected to mechanical stress, which can be converted into an electrical signal. The control element 34 refers to a module for processing electrical signals and generating control commands. Specifically, it can be implemented using a microcontroller. After receiving the sensing signal, the microcontroller determines the connection status through preset logic. The indicator element 35 refers to a device for providing visual or auditory feedback. Specifically, it can be implemented using an LED light or a buzzer. When a control command is received, the corresponding prompt function is activated. The trigger element 24 refers to a component capable of physical contact with the sensing element 33. Specifically, it can be implemented using a sealing ring fitted onto the insertion portion 21. During the insertion process, the sealing ring contacts the sensing element 33 and applies pressure.

[0057] It should be noted that the positioning indicator can be integrated inside the stop latch 31. The stop latch 31 has multiple slot structures to accommodate the sensor 33, the control element 34, and the indicator 35 respectively. The sensor 33 can be located on the inner side of the stop latch 31; the indicator 35 can be located on the outer side of the stop latch 31, such as in the first latch portion 313. When the second connector 20 is inserted into the first connector 10, the insertion portion 21 drives the trigger element 24 to move towards the sensor 33. At the moment of insertion, the trigger element 24 contacts the sensor 33 and applies pressure, causing the sensor 33 to generate a sensing signal due to the pressure. This signal is transmitted to the microcontroller for analog-to-digital conversion and logic judgment. If the signal strength exceeds a preset threshold, it is determined to be a valid connection. At this time, the microcontroller sends a drive signal to the indicator 35 to light it up or change its color, indicating to the operator that the air passage is open. If the connection is not fully in place, the contact pressure between the trigger 24 and the sensor 33 is insufficient. The microcontroller recognizes this as an invalid signal, and the indicator 35 remains off or displays an abnormal state, prompting the user to reconnect.

[0058] Compared with existing technologies, traditional quick-connect pneumatic circuit components lack a real-time monitoring mechanism for connection status. Operators can only judge whether the connection is in place by touch or experience, which poses a risk of misjudgment. This solution, however, forms a closed-loop detection circuit through the physical contact between the trigger element 24 and the sensing element 33. Combined with the logic processing of the control element 34 and the intuitive feedback of the indicator element 35, it achieves accurate identification and visual indication of the connection status, effectively avoiding air leakage problems caused by insufficient connection.

[0059] Through the above technical solution, the present invention solves the hidden danger of sealing failure caused by the invisible plug-in state of the pneumatic quick-connect component. Through photoelectric signal conversion and logical judgment mechanism, it ensures that the operator can accurately grasp the connection status, reduces the risk of air source waste caused by misoperation, and reduces system air pressure fluctuations caused by air leakage, thereby improving the operational stability and maintenance convenience of the pneumatic comfort system.

[0060] In some embodiments, the sensing element 33 includes a piezoelectric film; the trigger element 24 includes a sealing ring fitted onto the insertion portion 21.

[0061] In this embodiment of the invention, the piezoelectric film refers to a flexible thin film material capable of converting mechanical stress into electrical signals. Specifically, it can be implemented using polyvinylidene fluoride (PVDF) film, which is attached to the inner wall of the insertion groove 11 to sense the contact pressure applied by the sealing ring. The sealing ring is an annular sealing element fitted around the outer periphery of the insertion portion 21, specifically made of rubber, with an outer diameter slightly larger than the inner diameter of the insertion groove 11. During insertion, it is compressed and deformed to form a sealing interface. An annular groove 23 can be provided in the insertion portion 21, and the sealing ring is fitted within the annular groove 23. The sealing ring is also interference-fitted with the stop buckle 31. During insertion, the sealing ring presses against the sensing element 33 located on the inner wall of the stop buckle 31, causing the sensing element 33 to generate a sensing signal.

[0062] Specifically, when the second connector 20 is inserted into the first connector 10, the sealing ring contacts the inner wall of the insertion groove 11 and undergoes radial compression deformation. At this time, the piezoelectric film generates an electric charge signal due to the compression of the sealing ring. This electric charge signal is received by the control element 34 and converted into a trigger signal, which in turn drives the indicator 35 to emit a light or sound signal, thereby confirming the insertion status. During the insertion process, the sealing ring simultaneously performs the dual functions of sealing and triggering. Its deformation can be configured to be linearly related to the insertion depth. For example, when the insertion part 21 is fully inserted, the compression of the sealing ring reaches a preset threshold to trigger a stable signal output.

[0063] Through the above technical solution, this invention can monitor the insertion status in real time during the gas connection process and accurately determine the degree of compression of the sealing ring through the electrical signal generated by physical contact, thereby avoiding the risk of air leakage due to improper insertion. The flexible characteristics of the piezoelectric film enable it to adapt to the deformation characteristics of sealing rings of different specifications. For example, it can maintain a stable signal output under high temperature or vibration conditions, effectively improving the reliability of the gas quick-connect assembly in complex environments.

[0064] In some embodiments, an elastic snap-fit ​​arm 12 is provided on the first outer side of the first connector 10 along the circumferential direction. The elastic snap-fit ​​arm 12 has the same extension direction as the mating direction of the insertion groove 11, and a snap-fit ​​protrusion 121 and a limiting protrusion 122 are sequentially provided on the elastic snap-fit ​​arm 12 along the mating direction of the insertion groove 11. A positioning snap-fit ​​beam 25 is provided on the first outer side of the second connector 20 along the circumferential direction. When the second connector 20 is inserted into the first connector 10, the snap-fit ​​protrusion 121 passes through the positioning hole 26 of the positioning snap-fit ​​beam 25 and snaps into the positioning snap-fit ​​beam 25 when inserted into place. Pressing the elastic snap-fit ​​arm 12 can release the snap-fit ​​protrusion 121 from the positioning snap-fit ​​beam 25.

[0065] In this embodiment of the invention, the elastic snap-fit ​​arm 12 refers to a cantilever structure with elastic deformation capability. Specifically, it can be integrally injection molded with the first connector 10. Its extension direction is consistent with the docking direction of the insertion groove 11, ensuring that the contact trajectory between the snap-fit ​​protrusion 121 and the positioning snap-fit ​​beam 25 is controllable during the insertion process.

[0066] The limiting protrusion 122 refers to the boss structure provided along the surface of the elastic snap-fit ​​arm 12. Specifically, it can be implemented by step-shaped or hemispherical protrusions, which are used to limit the axial displacement of the first connector 10 during the insertion process.

[0067] The snap-fit ​​protrusion 121 refers to the hook-shaped structure set at the end of the elastic snap-fit ​​arm 12, which can be implemented with an inverted conical or wedge-shaped profile, and is used to form a mechanical interlock with the positioning snap-fit ​​beam 25.

[0068] The positioning snap-fit ​​beam 25 refers to an annular or segmented flange set on the outer periphery of the second connector 20. Specifically, it can be integrally formed on the second connector 20, and its width is adapted to the size of the snap-fit ​​protrusion 121 to provide a stable snap-fit ​​support surface.

[0069] Specifically, when the second connector 20 is inserted into the insertion slot 11 of the first connector 10, the positioning locking beam 25 on the insertion part 21 contacts the locking protrusion 121 of the elastic locking arm 12, forcing the elastic locking arm 12 to deform radially inward. As the insertion depth increases, the locking protrusion 121 slides along the inner side of the positioning locking beam 25 until it is fully inserted. At this point, the elastic locking arm 12 rebounds, causing the locking protrusion 121 to embed into the positioning hole 26 of the positioning locking beam 25, forming an axial fixation. At this time, the limiting protrusion 122 abuts against the end face of the positioning locking beam 25, preventing the insertion part 21 from moving further. When it is necessary to separate the connector, by pressing the elastic locking arm 12 to deform it, the locking protrusion 121 is released from the constraint of the positioning locking beam 25, thus releasing the interlocking state.

[0070] Through the above technical solution, the present invention achieves automatic triggering and rapid release of mechanical interlock during the insertion process, effectively preventing the joint from loosening due to vehicle vibration or external impact, thereby reducing the risk of air leakage. At the same time, the synergistic effect of the limiting protrusion 122 and the locking protrusion 121 ensures the consistency of the insertion depth, avoiding sealing failure caused by incomplete insertion, and further ensuring the utilization rate of the air source.

[0071] In some embodiments, along the second inner side of the circumference, the inner wall of the insertion groove 11 is provided with a limiting arc groove 15; along the second outer side of the circumference, the insertion part 21 is provided with an arc-shaped protrusion 28 that corresponds to and matches the limiting arc groove 15; when the second connector 20 and the first connector 10 are inserted into place, the arc-shaped protrusion 28 is positioned in the limiting arc groove 15.

[0072] In this embodiment of the invention, the limiting arc groove 15 refers to an arc-shaped recessed structure circumferentially arranged along the inner wall of the insertion groove 11. It can be achieved through machining or injection molding, and its arc angle can range from 90 degrees to 180 degrees. This structure, by forming a physical limiting boundary, can effectively restrict the rotational freedom of the insertion part 21 within the insertion groove 11. The arc-shaped protrusion 28 refers to a strip-shaped raised structure extending circumferentially along the outer wall of the insertion part 21. It can be achieved through integral molding with the insertion part 21, and its arc angle complements that of the limiting arc groove 15. This structure, through its cooperation with the limiting arc groove 15, enables the circumferential and axial positioning of the insertion part 21 within the insertion groove 11.

[0073] Specifically, when the second connector 20 is inserted into the first connector 10, the arc-shaped protrusion 28 of the insertion part 21 moves along the axial insertion path of the insertion groove 11. During the insertion phase, the arc-shaped protrusion 28 enters the arc-shaped track of the limiting arc groove 15, at which point the insertion part 21 is restricted to rotating within the arc range of the limiting arc groove 15. Through the mechanical cooperation between the arc-shaped protrusion 28 and the limiting arc groove 15, circumferential and axial positioning constraints are formed, balancing the forces on the first and second circumferential sides of the first connector 10 and the second connector 20. This prevents circumferential displacement of the insertion part 21 within the insertion groove 11 due to external vibration or external forces, and ensures the stability of the first connector 10 and the second connector 20 in the insertion axial direction.

[0074] Compared with existing technologies, traditional quick-connect assemblies mostly use elastic clips for axial fixation, but lack circumferential and axial limiting structures, making them prone to circumferential displacement and loosening in continuous vibration environments. This solution forms a dual positioning constraint through the mechanical cooperation of the limiting arc groove 15 and the arc-shaped protrusion 28, which maintains the reliability of axial fixation and increases circumferential torsional resistance.

[0075] Through the above technical solution, the present invention effectively solves the problem of sealing failure caused by circumferential displacement of quick-connect components under vibration environment, improves connection stability through mechanical limiting structure, avoids air leakage caused by misalignment of air passage due to circumferential displacement, and reduces abnormal friction loss between the plug part 21 and the inner wall of the plug groove 11, thus extending the service life of the component.

[0076] This invention also provides a pneumatic comfort system, which includes an air source device, an air valve device, and an air bag. The air source device is connected to the air bag for air circulation via the air valve device, which controls the inflation and deflation of the air bag. A quick-connect assembly for the air path is provided between the air source device and the air valve device. Specifically, this quick-connect assembly can be used to connect the air pipe leading from the air source to the air pipe connected to the air valve module. The first connector 10 has an air pipe connection nozzle at one end opposite to the insertion portion 21 for easy connection to the air pipe leading from the air source, and the second connector 20 has an air pipe connection nozzle at one end opposite to the insertion slot 11 for easy connection to the air pipe connected to the air valve module. The quick-connect assembly includes a first connector 10, a stop 32, and a second connector 20. The first connector 10 has a insertion groove 11 and a first air passage 14 communicating with it. The stop 32 is disposed in the insertion groove 11 and closes the first air passage 14. The second connector 20 has an insertion portion 21 adapted to the insertion groove 11 and a second air passage 27 extending to the insertion portion 21. When the second connector 20 is inserted into the first connector 10, the stop 32 is opened to realize the connection between the second air passage 27 and the first air passage 14.

[0077] In this embodiment of the invention, the quick-connect pneumatic assembly refers to a connection structure that achieves pneumatic passage opening or closing through a plug-in method. Specifically, it can be implemented using a design with a plug-in groove 11 and a plug-in part 21. During the plug-in process, the opening and closing state of the stop member 32 is controlled by mechanical linkage. The stop member 32 is a movable part used to close the pneumatic passage. Specifically, it can be implemented using an elastic sealing structure, such as a combination of an elastic connecting arm 322 and a sealing valve 323, which deforms under the action of external force during plug-in to open the pneumatic passage. The mating structure of the plug-in groove 11 and the plug-in part 21 refers to positioning and fixing through complementary geometric shapes. For example, it uses the snap-fit ​​protrusion 121 of the elastic connecting arm 12 and the snap-fit ​​beam 25, and the combination of the limiting arc groove 15 and the arc-shaped protrusion 28 to ensure that no circumferential displacement occurs after plug-in.

[0078] Specifically, when the second connector 20 is inserted into the insertion slot 11 of the first connector 10, the insertion part 21 pushes the stop 32 to move, causing the sealing valve 323 to disengage from the vent 315. At this time, the second air passage 27 communicates with the first air passage 14 through the opening 22 on the side of the insertion part 21. After insertion, the limiting arc groove 15 and the arc protrusion 28 cooperate to restrict circumferential rotation and axial separation. The locking protrusion 121 of the elastic locking arm 12 locks with the positioning locking beam 25 to prevent axial loosening. During the removal process, the stop 32 automatically resets and seals the air passage to prevent air leakage.

[0079] Through the above technical solution, the pneumatic comfort system achieves the function of plugging in and unplugging to seal at the pipeline connection, reducing the risk of air leakage caused by vibration or frequent plugging and unplugging, improving the reliability of the air circuit connection, avoiding air source loss in the non-connected state, and extending the service life of the air source device.

[0080] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent device or equivalent process transformation made based on the content of the present invention specification and drawings, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A quick-connect assembly for a pneumatic circuit, characterized in that, include: The first connector (10) is provided with a plug groove (11) and a first air passage (14) communicating with the plug groove (11). A stop (32) is disposed in the insertion slot (11) and closes the first air passage (14). The second connector (20) is provided with a plug portion (21) that is adapted to the plug slot (11) and a second air passage (27) that extends into the plug portion (21); the second connector (20) opens the stop (32) when it is adapted to the first connector (10) for plugging, so that the second air passage (27) is connected to the first air passage (14).

2. The quick-connect assembly for the pneumatic circuit according to claim 1, characterized in that, It also includes a stop buckle (31); the stop buckle (31) is snapped and fixedly installed in the insertion groove (11); The stop (32) is disposed in the insertion groove (11) by the stop buckle (31); the stop buckle (31) is provided with a vent (315) connecting the insertion groove (11) and the first air passage (14), and the stop (32) closes the vent (315).

3. The quick-connect assembly for the pneumatic circuit according to claim 2, characterized in that, The stop (32) includes a mounting ring (321), at least two elastic connecting arms (322), and a sealing valve (323); the mounting ring (321) is connected to the sealing valve (323) through the at least two elastic connecting arms (322); The mounting ring (321) is fixed to the inner wall of the insertion groove (11) by the stop buckle (31); the stop buckle (31) is provided with a movable groove (314) that connects the first air passage (14) and the vent (315); the sealing valve (323) is connected to the movable groove (314) by the at least two elastic connecting arms (322) and seals the vent (315).

4. The quick-connect assembly for the pneumatic circuit according to claim 3, characterized in that, The inner wall of the movable groove (314) is provided with guide ribs (311), and the sealing valve (323) can extend and retract within the movable groove (314) along the guide ribs (311) to close or open the vent hole (315), and an air guide groove (312) is formed between two adjacent guide ribs (311); the guide ribs (311) extend from the end face of the stop buckle (31) in a direction away from the vent hole (315) to form a limiting step (316) that restricts the mounting ring (321).

5. The quick-connect assembly for the pneumatic circuit according to claim 1, characterized in that, The opening (22) of the second airway (27) extends and is located on the side of the insertion part (21).

6. The quick-connect assembly for the pneumatic circuit according to claim 1, characterized in that, It also includes a positioning display; the positioning display includes a sensor (33), a control element (34) and an indicator (35), the sensor (33) and the indicator (35) being connected to the control element (34); The second connector (20) has a trigger (24) on its insertion part (21). When the second connector (20) is fitted into the first connector (10), the trigger (24) triggers the sensor (33) to generate a sensing signal. The sensing signal is received and processed by the control unit (34) and then instructs the indicator (35) to issue an indicator signal.

7. The quick-connect assembly for the pneumatic circuit according to claim 6, characterized in that, The sensing element (33) includes a piezoelectric film; and / or, the trigger element (24) includes a sealing ring fitted onto the plug portion (21).

8. The quick-connect assembly for the pneumatic circuit according to claim 1, characterized in that, The first connector (10) is provided with an elastic snap-fit ​​arm (12) on its first outer side in the circumferential direction. The elastic snap-fit ​​arm (12) has the same extension direction as the docking direction of the insertion groove (11), and the elastic snap-fit ​​arm (12) is provided with a snap-fit ​​protrusion (121) and a limiting protrusion (122) in sequence along the docking direction of the insertion groove (11). The second connector (20) is provided with a positioning snap-fit ​​beam (25) on the first outer side along the circumferential direction. When the second connector (20) is inserted into the first connector (10), the snap-fit ​​protrusion (121) passes through the positioning snap-fit ​​beam (25) and snaps into the positioning snap-fit ​​beam (25) when inserted into place. When the elastic snap-fit ​​arm (12) is pressed, the snap-fit ​​protrusion (121) can be released from the positioning snap-fit ​​beam (25).

9. The quick-connect assembly for pneumatic circuits according to claim 1, characterized in that, Along the second inner side of the circumference, the inner wall of the insertion groove (11) is provided with a limiting arc groove (15); along the second outer side of the circumference, the insertion part (21) is provided with an arc-shaped protrusion (28) that corresponds to and matches the limiting arc groove (15). When the second connector (20) is inserted into the first connector (10), the arc-shaped protrusion (28) is positioned within the limiting arc groove (15).

10. A pneumatic comfort system, characterized in that, Includes the quick-connect pneumatic assembly as described in any one of claims 1-9.

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