Ventilated seat fan interface structure and automobile seat

Abstract

The application provides a ventilated seat fan interface structure and a car seat. The fan interface structure comprises a guide film assembly, the guide film assembly covers a ventilation slot of a seat foam back, an elastic interface mechanism is arranged on the guide film assembly corresponding to the ventilation slot, and the elastic interface mechanism has a telescopic free end; the free end of the elastic interface mechanism is embedded in an annular connecting groove of a fan assembly, so that the fan assembly and the guide film assembly are fixed, and the fan assembly is used for driving gas to flow on both sides of the seat foam; by arranging the elastic interface mechanism on the guide film assembly and arranging the annular connecting groove corresponding to the elastic interface mechanism on the fan assembly, the free end of the elastic interface mechanism is embedded in the annular connecting groove, so that the fan assembly and the guide film assembly are directly fixed, and the elastic interface mechanism can adjust or compensate for the installation misalignment of the fan assembly; compared with the traditional mode, the connection structure is simplified, and the air leakage problem caused by the failure to assemble or the misassembly is avoided.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a ventilated seat fan interface structure and an automotive seat. Background Technology

[0002] As an important feature for improving driving and riding comfort, car seat ventilation systems are mainly used to improve air circulation on the seat surface and reduce stuffiness and dampness during long journeys. Existing ventilation systems on the market primarily rely on fans to drive airflow, delivering air to the seat surface through ducts and air bags to achieve ventilation. Currently, the connection between the fan and the air bag's ventilation interface mainly uses a snap-fit ​​or compression structure. The snap-fit ​​structure requires a pre-installed fixing plate at the air bag's ventilation interface, with the fan snapped into the fixing plate for fixation. The compression structure eliminates the need for a fixing plate; instead, a connection port is created on the back panel of the seat suspension, through which the air bag's ventilation interface extends to the fan side. The fan is then installed onto the back panel, and both sides clamp the air bag's ventilation interface for fixation. However, this method is more cumbersome to assemble and requires consideration of the compatibility between the air bag, back panel, and fan, which can easily lead to misalignment between the fan center and the ventilation interface center, resulting in assembly failure or air leakage due to improper assembly. Summary of the Invention

[0003] The purpose of this application is to address the above problems by providing a ventilated seat fan interface structure and a car seat.

[0004] In a first aspect, this application provides a ventilated seat fan interface structure, including: An air guide film assembly covers the ventilation slots on the back of the seat foam, and the air guide film assembly is provided with an elastic interface mechanism corresponding to the ventilation slots, the elastic interface mechanism having a retractable free end; The free end of the elastic interface mechanism is embedded in the annular connecting groove of the fan assembly to fix the fan assembly to the air guide film assembly; the fan assembly is used to drive the gas to flow on both sides of the seat foam.

[0005] According to the technical solutions provided in certain embodiments of this application, the flexible interface mechanism includes: The connecting part is fixed to the air guide membrane assembly; A corrugated section is located at the end of the connecting portion away from the air guide membrane assembly. The corrugated section is expandable and its free end is fixed to the annular connecting groove.

[0006] According to the technical solutions provided in certain embodiments of this application, the flexible interface mechanism further includes: A protrusion is located at the free end of the corrugated portion and is embedded in the annular connecting groove.

[0007] According to the technical solutions provided in certain embodiments of this application, a limiting structure is provided at the opening of the annular connecting groove, and the limiting structure is used to limit the protrusion.

[0008] According to the technical solutions provided in certain embodiments of this application, the fan assembly includes: A first fan is disposed within the ventilation slot; The second fan is located on the side of the air guide film assembly away from the first fan and is fixed to the first fan. The annular connecting groove is formed between the first fan and the second fan, and the air inlet of the first fan is connected to the air inlet of the second fan.

[0009] According to the technical solutions provided in certain embodiments of this application, the fan assembly includes: A third fan is disposed within the ventilation slot; A connector is fixed to the third fan and located on the side of the elastic interface mechanism away from the third fan, so that the third fan is fixed to the elastic interface mechanism.

[0010] According to the technical solutions provided in certain embodiments of this application, the air guiding membrane assembly includes: A sealing layer covering the ventilation slot, the sealing layer being provided with the elastic interface mechanism; A connecting ring is provided on the side of the sealing layer near the seat foam. The connecting ring is provided along the edge of the sealing layer and is used to connect the seat foam and the sealing layer.

[0011] According to the technical solutions provided in certain embodiments of this application, the fan assembly is fixed to the seat foam by a fastener.

[0012] According to the technical solutions provided in certain embodiments of this application, a pressure-bearing air guide is provided around the fan assembly in the ventilation slot.

[0013] Secondly, this application provides an automobile seat, including a ventilated seat fan interface structure and seat foam as described above; The seat foam has multiple ventilation holes, which are connected to the ventilation slot.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a ventilated seat fan interface structure and an automotive seat. The fan interface structure includes an air guide film assembly that covers the ventilation groove on the back of the seat foam. The air guide film assembly has an elastic interface mechanism corresponding to the ventilation groove, and the elastic interface mechanism has a retractable free end. The free end of the elastic interface mechanism is embedded in the annular connecting groove of the fan assembly to fix the fan assembly and the air guide film assembly. The fan assembly is used to drive the gas to flow on both sides of the seat foam. By setting an elastic interface mechanism on the air guide film assembly and setting an annular connecting groove corresponding to the elastic interface mechanism on the fan assembly, and embedding the free end of the elastic interface mechanism in the annular connecting groove, the fan assembly and the air guide film assembly are directly fixed. Moreover, the elastic interface mechanism can provide redundancy for the installation of the fan assembly through its own elasticity, and adjust or compensate for the installation misalignment of the fan assembly. Compared with the traditional method, the connection structure is simplified, the cost is reduced, and the problem of air leakage caused by the inability to assemble or incomplete assembly due to the misalignment of multiple parts is further avoided.

[0015] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a ventilated seat fan interface structure provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure of a fan assembly for a ventilated seat fan interface structure provided in Embodiment 1 of this application, which includes a first fan and a second fan. Figure 3 for Figure 2 Enlarged view of section A; Figure 4 A schematic diagram of the structure of a fan assembly for a ventilated seat fan interface structure provided in Embodiment 1 of this application, including a third fan and a connector; Figure 5 for Figure 4 Enlarged view of section B; Figure 6 A schematic diagram of the structure for fixing the fan assembly to the elastic interface mechanism when the connector of the ventilated seat fan interface structure provided in Embodiment 1 of this application uses a snap ring or cable tie; Figure 7 A schematic diagram of the third fan, elastic interface mechanism and connector when the connector of the ventilated seat fan interface structure provided in Embodiment 1 of this application is a snap ring or cable tie; Figure 8 This is a schematic diagram of the structure of a ventilated seat fan interface structure with a composite structure, as provided in Embodiment 1 of this application. Figure 9 for Figure 8 Enlarged view of section C; Figure 10 This is a schematic diagram of a fan assembly for a ventilated seat fan interface structure provided in Embodiment 1 of this application in a first working mode; Figure 11 This is a schematic diagram of the fan assembly of a ventilated seat fan interface structure provided in Embodiment 1 of this application in a second working mode; Figure 12 This is a schematic diagram of the structure of a fan assembly in a ventilated seat fan interface structure provided in Embodiment 1 of this application, when the fan assembly is fixed to the seat foam. Figure 13 This is another structural schematic diagram of the fan assembly of the ventilated seat fan interface structure provided in Embodiment 1 of this application when it is fixed to the seat foam; Figure 14 This is a schematic diagram of the elastic interface mechanism of a ventilated seat fan interface structure provided in Embodiment 1 of this application; Figure 15 This is a schematic diagram of the structure of a fan for a ventilated seat fan interface structure provided in Embodiment 1 of this application.

[0018] The text labels in the image represent: 1. Fan assembly; 2. Air guide membrane assembly; 3. Flexible interface mechanism; 4. Seat foam; 5. Pressure-bearing air guide component; 6. Fixing component; 7. Seat cover; 11. First fan; 12. Second fan; 13. Third fan; 14. Connector; 21. Sealing layer; 22. Connecting ring; 31. Connecting part; 32. Corrugated part; 33. Protrusion; 41. Ventilation hole; 42. Ventilation groove; 101. Annular connecting groove; 102. Limiting structure. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this invention.

[0020] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0021] Example 1 As mentioned in the background section, in order to solve the problems existing in the prior art, this embodiment provides a ventilated seat fan interface structure, including: The air guide membrane assembly 2 covers the ventilation groove 42 on the back of the seat foam 4. The air guide membrane assembly 2 is provided with an elastic interface mechanism 3 corresponding to the ventilation groove 42. The elastic interface mechanism 3 has a retractable free end. The free end of the flexible interface mechanism 3 is embedded in the annular connecting groove 101 of the fan assembly 1 to fix the fan assembly 1 to the air guide membrane assembly 2; the fan assembly 1 is used to drive the gas to flow on both sides of the seat foam 4.

[0022] like Figure 1-15As shown, the ventilation slot 42 is located on the side of the seat foam 4 away from the human body. The ventilation slot 42 is approximately a rectangular groove. The air guide membrane assembly 2 is an elastic sealing structure. The air guide membrane assembly 2 covers the opening of the ventilation slot 42, and its circumferential edge is fixedly connected to the seat foam 4. The elastic interface mechanism 3 is located on the air guide membrane assembly 2 and connects the ventilation slot 42 and the outside of the air guide membrane assembly 2. The elastic interface mechanism 3 can be integrally formed with the air guide membrane assembly 2. A connection port is opened on the air guide membrane assembly 2, and a wavy pleated structure is formed on the outer periphery of the connection port, thus forming the elastic interface mechanism 3. The elastic interface mechanism 3 can also be an independent soft rubber port with a wavy pleated structure. A connection port is provided on the air guide membrane assembly 2, and a soft rubber joint is fixed at the connection port to form an elastic interface mechanism 3. The fan assembly 1 includes a first part and a second part. The first part is disposed in the ventilation groove 42, and the second part is located on the side of the air guide membrane assembly 2 away from the ventilation groove 42. The first part and the second part can be fixed to each other. After the first part and the second part are fixedly connected, an annular connecting groove 101 is formed in their circumference. The inner walls of the annular connecting groove 101 along both sides in the first direction jointly clamp the free end of the elastic interface mechanism 3, so that the fan assembly 1 is fixed on the air guide membrane assembly 2. The fan assembly 1 can drive the gas to flow on both sides of the seat foam 4, thereby realizing the ventilation function of the car seat.

[0023] By setting an elastic interface mechanism 3 on the air guide membrane assembly 2 and setting an annular connecting groove 101 corresponding to the elastic interface mechanism 3 on the fan assembly 1, the free end of the elastic interface mechanism 3 is embedded in the annular connecting groove 101, so that the fan assembly 1 and the air guide membrane assembly 2 are directly fixed. Moreover, the elastic interface mechanism 3 can provide redundancy for the installation of the fan assembly 1 through its own elasticity, and adjust or compensate for the installation misalignment of the fan assembly 1. Compared with the traditional method, the connection structure is simplified, the cost is reduced, and the problem of air leakage caused by the inability to assemble or the incomplete assembly due to the difference in the fit of multiple parts is further avoided.

[0024] In a preferred embodiment, when the resilient interface mechanism 3 uses an independent soft adhesive joint, the resilient interface mechanism 3 includes: Connecting part 31, the connecting part 31 is fixed on the air guide membrane assembly 2; The corrugated part 32 is located at the end of the connecting part 31 away from the air guide membrane assembly 2. The corrugated part 32 is telescopic and its free end is fixed to the annular connecting groove 101.

[0025] like Figure 3 , Figure 5 and Figure 14As shown, the elastic interface mechanism 3 is approximately a ring structure. The connecting part 31 and the corrugated part 32 are integrally formed along the radial direction of the ring structure. The connecting part 31 is located on the outer periphery of the ring structure and is used to fix the connection port of the air guide membrane assembly 2. The connecting part 31 and the air guide membrane assembly 2 can be fixed by adhesive bonding, hot melt adhesive pressing, etc. The corrugated part 32 is a wave-shaped pleated structure located on the inner periphery of the ring structure. It can be stretched or contracted along the radial direction of the ring structure. When the fan assembly 1 is installed, the corrugated part 32 can be stretched outward to expand the diameter at the interface for easy installation. After installation, the corrugated part 32 contracts towards the center to fix the fan assembly 1.

[0026] Furthermore, the flexible interface mechanism 3 also includes a protrusion 33, which is located at the free end of the corrugated portion 32 and is embedded in the annular connecting groove 101.

[0027] Specifically, the protrusion 33 is integrally formed on the end of the corrugated portion 32 away from the connecting portion 31. The thickness of the protrusion 33 is greater than that of the connecting portion 31 and the corrugated portion 32. It is embedded in the annular connecting groove 101 and can be fixed with the annular connecting groove 101 by interference fit.

[0028] Furthermore, a limiting structure 102 is provided at the opening of the annular connecting groove 101, which is used to limit the protrusion 33.

[0029] For details, please refer to Figure 3 , Figure 5 and Figure 15 The limiting structure 102 can be a claw, with a single claw located on the end face edge of the first part near the second part, or on the end face edge of the second part near the first part. The number of claws can be multiple, with multiple claws evenly distributed along the circumference of the first part on the end face edge of the first part near the second part, or evenly distributed along the circumference of the second part on the end face edge of the second part near the first part. The limiting structure 102 can also be an annular snap-fit ​​part, located on the end face edge of the first part near the second part, or on the end face edge of the second part near the first part. The claw or snap-fit ​​part is used to limit the protrusion 33 in the annular connecting groove 101, preventing the protrusion 33 from coming out of the annular connecting groove 101 due to force on the elastic interface mechanism 3 after the fan assembly 1 is installed, thus ensuring the normal operation of the seat ventilation system.

[0030] In a preferred embodiment, the fan assembly 1 includes: The first fan 11 is located inside the ventilation slot 42; The second fan 12 is located on the side of the air guide membrane assembly 2 away from the first fan 11 and is fixed to the first fan 11. An annular connecting groove 101 is formed between the first fan 11 and the second fan 12. The air inlet of the first fan 11 is connected to the air inlet of the second fan 12.

[0031] like Figure 2 , Figure 3 , Figure 10 and Figure 11 As shown, the first fan 11 and the second fan 12 can be vortex fans, butterfly fans, or axial fans in the prior art. The first fan 11 and the second fan 12 are the first part and the second part mentioned above. The first fan 11 and the second fan 12 are respectively located on both sides of the air guide film assembly 2 along the first direction, and can be fixed to each other by screws or rubber rivets. After the fixed connection, an annular connecting groove 101 is formed on the side of the two that are close to each other in the circumferential direction. The inner walls of the annular connecting groove 101 along both sides of the first direction jointly clamp the protrusion 33 of the elastic interface mechanism 3, so that the fan assembly 1 is fixed on the air guide film assembly 2; the first fan 11 and the second fan 12 are respectively located on both sides of the air guide film assembly 2 along the first direction. The air inlets of the two fans 12 are correspondingly set and connected. The fan assembly 1 has two working modes. In the first mode, the first fan 11 is working and the second fan 12 is not working. The first fan 11 drives the gas from the side of the seat foam 4 away from the human body, through the second fan 12, the first fan 11, and the ventilation channel 42 in sequence, and then discharges it to the side of the seat foam 4 close to the human body. In the second mode, the second fan 12 is working and the first fan 11 is not working. The second fan 12 drives the gas from the side of the seat foam 4 close to the human body, through the ventilation channel 42, the first fan 11, and the second fan 12 in sequence, and then discharges it to the side of the seat foam 4 away from the human body.

[0032] Furthermore, the fan assembly 1 is fixed to the seat foam 4 by the fastener 6.

[0033] For details, please refer to Figure 12 and Figure 13 The fastener 6 can be made of rubber rivets, screws, self-tapping screws, or clips. Rubber screws are pre-embedded in the seat foam 4. Rubber rivets are used to pass through the first fan 11 and the second fan 12 in sequence, so that the first fan 11 and the second fan 12 are fixed to each other and to the seat foam 4 at the same time. Alternatively, a fixing plate can be pre-embedded in the seat foam 4. Screws or self-tapping screws are used to pass through the second fan 12 and the first fan 11 in sequence to fix them to each other. Then the screws or self-tapping screws are connected to the fixing plate to fix the fan assembly 1 to the seat foam 4. Alternatively, a snap-fit ​​structure can be pre-embedded in the seat foam 4. The clip is set on the side of the first fan 11 near the seat foam 4. The first fan 11 is fixed to the seat foam 4 by snap-fitting the clip with the snap-fit ​​structure. The first fan 11 can be fixed to the second fan 12 by rubber rivets, screws, self-tapping screws, etc.

[0034] In a preferred embodiment, the fan assembly 1 includes: The third fan 13 is located inside the ventilation slot 42; Connector 14 is fixed to the third fan 13 and located on the side of the elastic interface mechanism 3 away from the third fan 13, so that the third fan 13 is fixed to the air guide membrane assembly 2.

[0035] like Figure 4 and Figure 5 As shown, the third fan 13 can also be a vortex fan, butterfly fan or axial fan in the prior art. The third fan 13 and the connector 14 are the first part and the second part mentioned above. The third fan 13 and the connector 14 are respectively provided on both sides of the air guide film assembly 2 along the first direction. The connector 14 can be fixed on the end face of the third fan 13 away from the seat foam 4. After the fixed connection, an annular connecting groove 101 is formed on the side where the two are close to each other. The inner walls of the annular connecting groove 101 along both sides of the first direction jointly clamp the protrusion 33 of the elastic interface mechanism 3, so that the fan assembly 1 is fixed on the air guide film assembly 2.

[0036] like Figure 6 and Figure 7 As shown, the connector 14 can also be a snap ring or a cable tie. The third fan 13 is provided with an annular connecting groove 101. The elastic interface mechanism 3 is sleeved on the third fan 13, and the free end of the elastic interface mechanism 3 is located in the annular connecting groove 101. The snap ring or cable tie is sleeved on the free end of the elastic interface mechanism 3, located on the side of the elastic interface mechanism 3 away from the third fan 13. The snap ring or cable tie is tightened to fix the third fan 13 and the elastic interface mechanism 3.

[0037] A flexible interface mechanism was used to achieve a "quasi-floating" fixation of the fan assembly relative to the seat foam, thereby constructing a multi-level, staged vibration reduction and noise reduction system. From the perspective of structural dynamics, this system establishes a highly controllable impedance mismatch barrier and energy dissipation interface between the broadband vibration generated by the fan assembly during operation and the huge sound radiator of the seat foam.

[0038] It is essential to understand the mechanisms underlying vibration and noise generation in seat ventilation systems. The fan assembly integrates a high-speed motor and impeller. Even with precise dynamic balancing, mechanical vibrations caused by electromagnetic pulsations, aerodynamic turbulence, and micro-vibrations in bearing raceways are unavoidable. In traditional rigid or semi-rigid connection schemes, these vibrations are transmitted to the seat foam with almost no attenuation through the fan housing, metal brackets, or rigid clips. While the foam material itself is a good energy absorber, its large surface area and extremely light weight make it a highly efficient "speaker diaphragm," amplifying and radiating minute structural vibrations into annoying low-frequency humming or high-frequency hissing sounds. Especially in the quiet cabin when the vehicle is stationary or moving at low speeds, this noise can severely impact the user's comfort.

[0039] This flexible interface mechanism forms a flexible link with extremely low mechanical impedance between the fan assembly and the air guide membrane assembly. According to the principle of vibration isolation, effective vibration isolation can only be achieved when the natural frequency of the vibration isolation element is much lower than the excitation frequency. In this solution, the flexible interface mechanism, especially its corrugated structure, can be designed to have extremely low radial and axial natural frequencies (e.g., below 20Hz) by adjusting the elastic modulus of the material, the geometric thickness of the corrugations, the crest height, and the wave pitch, which is far lower than the common operating fundamental frequency and harmonics of the fan assembly. Therefore, most of the vibration energy is reflected back to the fan assembly itself at this flexible interface and cannot continue to propagate to the downstream air guide membrane assembly and seat foam, thus cutting off the path of vibration conversion into noise at the source.

[0040] Furthermore, the damping effect of the flexible interface mechanism is not isolated, but forms a clever "slot-free end" synergistic damping structure with the annular connecting groove on the fan housing. The inner walls of both sides of the annular connecting groove along the first direction (usually the axial direction) clamp the free end of the flexible interface mechanism, providing a highly stable constraint. From a mechanical dynamics perspective, this structure allows the fan assembly to have a small degree of oscillation freedom in its plane of operation, while maintaining precise positioning in the direction perpendicular to that plane (i.e., the axial direction). This anisotropic constraint design is highly ingenious: it allows the fan assembly to dissipate the centrifugal force and aerodynamic imbalance force generated by the rotating parts through its own small flutter in the radial plane, like a self-aligning floating bearing; simultaneously, it maintains high stiffness in the axial direction, where a precise clearance between the impeller and the housing is required, preventing catastrophic failure caused by the impeller scraping the housing. This "rigid-flexible" constraint method perfectly balances the relationship between damping requirements and performance maintenance.

[0041] In traditional designs, a portion of the fan assembly (typically the volute section with the largest radial dimension) is often directly pressed into the foam mounting groove, with the two secured by the compressive reaction force of the foam. This full-area tight fit leads to significant acoustic problems: every micro-vibration of the fan housing directly excites the foam, like striking a drumhead, and the large contact area provides an efficient channel for sound wave transmission. In this optimized design, a precisely controlled gap is created between the fan assembly and the seat foam inner wall forming the ventilation channel—either "non-contact" or "partial contact" only at specific locations. This gap is precisely maintained by an elastic interface mechanism, which acts like an invisible centering spring, suspending the fan assembly in the center of the ventilation channel.

[0042] This "suspended body" design concept offers multiple benefits. First, it completely cuts off the solid-to-solid transmission path that directly transmits vibrations from the fan housing to the foam, significantly reducing sound radiation efficiency. Second, when a vehicle travels on bumpy roads or experiences severe impacts, the seat foam undergoes significant dynamic deformation. If the fan is in rigid contact with the foam, the deformation of the foam will directly transmit the enormous impact force to the fan, causing the housing to crack or internal components to be damaged. In this design, due to the presence of gaps, normal vibrations and minor impacts are absorbed by the elastic interface mechanism; only when encountering exceptionally large amplitude impacts, and the deformation of the foam exceeds the threshold of the reserved gap, will a specific local area of ​​the fan housing make "staged" contact with the inner wall of the foam. At this point, the contact undergoes a crucial qualitative change: from continuous rigid contact to a momentary "damping buffer."

[0043] Preferably, a damping structure is integrated into the seat foam, the fan housing, or both, at a predetermined local contact area. Most preferably, this damping structure is pre-integrated into the seat foam. For example, several soft damping protrusions, fins, or annular ribs can be integrally foamed and molded on a specific inner wall of the foam ventilation channel. The material can be a viscoelastic foam or elastomer gel that is softer and has a higher damping coefficient than the seat foam itself. When the fan assembly is in normal suspended operation, these damping structures are completely detached from the fan housing and do not interfere with each other. When an impact occurs and the fan housing wobbles or displaces, it will first come into contact with these soft damping structures. At the moment of intervention, these structures first absorb part of the impact kinetic energy through their own elastic deformation, and then, through their high damping material properties, convert the remaining kinetic energy into a small amount of heat energy and dissipate it, thereby causing the impact force transmitted to the fan to decrease exponentially. This constitutes a complete, staged vibration and impact management system of "non-contact free suspension - gap displacement - pre-integration of damping structure - extreme value buffering".

[0044] The flexible interface mechanism itself constitutes the locking method of the free end, which is the structural foundation for realizing the above-mentioned suspension vibration damping system. In this embodiment, the fixing of the free end is no longer the traditional pursuit of "the tighter the better" through screw locking or interference pressing, but has evolved into a "flexible locking". The holding force of this flexible locking comes from the rebound force or thermal contraction force of the flexible interface mechanism itself, which provides a basic and uniform radial clamping force, firmly pressing the protrusion into the annular connecting groove. The magnitude of this force is precisely calculated to be sufficient to resist the self-weight of the fan assembly and the micro-overturning moment generated during normal operation, ensuring that the fan will not come out under any posture, while also being small enough to allow micro-relative slippage between the contact surfaces, thereby dissipating vibration energy through interface friction damping. This is itself a highly efficient dynamic vibration absorber.

[0045] Furthermore, the flexible interface mechanism can be integrated with the air guide membrane assembly in terms of material uniformity, meaning the flexible interface mechanism and the air guide membrane assembly are integrally molded. When the air guide membrane assembly uses TPU film or coated nylon (i.e., nylon fabric coated with polyurethane or other elastomers), a flexible interface mechanism with a corrugated structure can be integrally molded in a high-frequency hot press mold. This integrated construction completely eliminates all potential leakage points and separation risks, turning the entire air guide system into a single, complete component. The air guide membrane assembly, made of coated nylon, provides high strength, tear resistance, and dimensional stability through its base fabric (nylon), while the elastic coating on the surface provides the sealing properties and elastomer characteristics required to form the corrugated structure, representing a perfect combination of strength and elasticity.

[0046] Furthermore, the fan assembly 1 is fixed to the seat foam 4 by the fastener 6.

[0047] Specifically, the fastener 6 can be made of rubber rivets, screws, self-tapping screws, or clips. Rubber screws are pre-embedded in the seat foam 4, and rubber rivets are used to pass through the third fan 13 to fix the fan assembly 1 to the seat foam 4. Alternatively, a fixing plate can be pre-embedded in the seat foam 4, and screws or self-tapping screws are used to pass through the third fan 13 and connect to the fixing plate, thereby fixing the fan assembly 1 to the seat foam 4. Alternatively, a snap-fit ​​structure can be pre-embedded in the seat foam 4, and the clips are set on the side of the third fan 13 near the seat foam 4. The fan assembly 1 is fixed to the seat foam 4 by snapping the clips with the snap-fit ​​structure.

[0048] In a preferred embodiment, the air guide membrane assembly 2 includes: A sealing layer 21 covers the ventilation slot 42, and an elastic interface mechanism 3 is provided on the sealing layer 21; The connecting ring 22 is located on the side of the sealing layer 21 near the seat foam 4. The connecting ring 22 is arranged along the edge of the sealing layer 21 and is used to connect the seat foam 4 and the sealing layer 21.

[0049] like Figure 1 As shown, the sealing layer 21 can be a single TPU film or a PVC film, such as... Figure 8 and Figure 9 As shown, the sealing layer 21 can also adopt a structure of TPU film or PVC film and non-woven fabric composite. The sealing layer 21 is integrally formed or fixedly connected with an elastic interface mechanism 3. The connecting ring 22 is located at the edge of the sealing layer 21 near the seat foam 4. The sealing layer 21 can be fixed to the seat foam 4 by means of adhesive or other methods.

[0050] In a preferred embodiment, a pressure-bearing air guide 5 is provided around the fan assembly 1 within the ventilation slot 42.

[0051] like Figure 1 As shown, the pressure-bearing air guide 5 can adopt the existing 3D spaced mesh fabric, which has several woven mesh holes and a certain thickness, with good air permeability and support. It can also ensure ventilation when squeezed by the human body. The pressure-bearing air guide 5 is filled inside the ventilation groove 42. The sealing layer 21 can be supported by the side of the sealing layer 21 near the seat foam 4. At the same time, the porous structure of the pressure-bearing air guide 5 can balance the gas pressure after the gas enters the ventilation groove 42, making the airflow more stable.

[0052] Example 2 This embodiment provides a car seat, including a ventilated seat fan interface structure and seat foam 4 as described in Embodiment 1; The seat foam 4 has multiple ventilation holes 41, which are connected to the ventilation slot 42.

[0053] It should be noted that the car seat provided in this embodiment has the beneficial effects of the ventilated seat fan interface structure provided in Embodiment 1 above, which will not be repeated here.

[0054] The seat foam 4 has a first side close to the human body and a second side away from the human body along its thickness direction. The first side is covered with a seat cover 7, and a ventilation groove 42 is provided on one side of the second side. Multiple ventilation holes 41 are opened on the seat foam 4. The ventilation holes 41 extend along the thickness direction of the seat foam 4 and connect with the ventilation groove 42, so that the gas on both sides of the seat foam 4 can flow through the ventilation holes 41 and the ventilation groove 42.

[0055] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A ventilated seat fan interface structure, characterized in that, include: Air guide film assembly (2), the air guide film assembly (2) covers the ventilation groove (42) on the back of the seat foam (4), the air guide film assembly (2) is provided with an elastic interface mechanism (3) corresponding to the ventilation groove (42), the elastic interface mechanism (3) has a retractable free end; The free end of the elastic interface mechanism (3) is embedded in the annular connecting groove (101) of the fan assembly (1) so that the fan assembly (1) is fixed to the air guide film assembly (2); the fan assembly (1) is used to drive the gas to flow on both sides of the seat foam (4).

2. The ventilated seat fan interface structure according to claim 1, characterized in that, The flexible interface mechanism (3) includes: A connecting part (31) is fixed to the air guide membrane assembly (2); The corrugated part (32) is located at the end of the connecting part (31) away from the air guide membrane assembly (2). The corrugated part (32) is telescopic and its free end is fixed to the annular connecting groove (101).

3. The ventilated seat fan interface structure according to claim 2, characterized in that, The flexible interface mechanism (3) also includes: The protrusion (33) is located at the free end of the corrugated part (32) and is embedded in the annular connecting groove (101).

4. The ventilated seat fan interface structure according to claim 3, characterized in that, The annular connecting groove (101) is provided with a limiting structure (102) at the groove opening, and the limiting structure (102) is used to limit the protrusion (33).

5. The ventilated seat fan interface structure according to claim 1, characterized in that, The fan assembly (1) includes: The first fan (11) is located inside the ventilation slot (42); The second fan (12) is located on the side of the air guide film assembly (2) away from the first fan (11) and is fixed to the first fan (11). The annular connecting groove (101) is formed between the first fan (11) and the second fan (12). The air inlet of the first fan (11) is connected to the air inlet of the second fan (12).

6. The ventilated seat fan interface structure according to claim 1, characterized in that, The fan assembly (1) includes: The third fan (13) is located inside the ventilation slot (42); A connector (14) is fixed to the third fan (13) and located on the side of the elastic interface mechanism (3) away from the third fan (13) so that the third fan (13) is fixed to the elastic interface mechanism (3).

7. The ventilated seat fan interface structure according to claim 1, characterized in that, The air guide membrane assembly (2) includes: A sealing layer (21) covers the ventilation slot (42), and the sealing layer (21) is provided with the elastic interface mechanism (3). A connecting ring (22) is provided on the side of the sealing layer (21) near the seat foam (4). The connecting ring (22) is provided along the edge of the sealing layer (21). The connecting ring (22) is used to connect the seat foam (4) and the sealing layer (21).

8. The ventilated seat fan interface structure according to claim 1, characterized in that, The fan assembly (1) is fixed to the seat foam (4) by a fastener (6).

9. The ventilated seat fan interface structure according to claim 1, characterized in that, The ventilation slot (42) is surrounded by a pressure-bearing air guide (5).

10. A car seat, characterized in that, Includes a ventilated seat fan interface structure and seat foam as described in any one of claims 1-9 (4); The seat foam (4) has multiple ventilation holes (41) and the multiple ventilation holes (41) are connected to the ventilation groove (42).

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