Foreign matter preventing device for fan and vehicle

Abstract

The utility model discloses a fan foreign matter prevention device and a vehicle, the fan foreign matter prevention device is used for being assembled on a seat of the vehicle, the fan foreign matter prevention device comprises a fixing frame, a buffer piece and a protection piece, the fixing frame comprises a first side and a second side which are opposite, the first side is used for being fixedly connected with a fan, and the fixing frame is further used for being connected with a framework of the seat through a rib; the second side abuts against a ventilation bag of the seat, and a through hole is formed in the fixing frame and used for communicating the fan with the ventilation bag; the buffer piece is arranged between the fixing frame and the fan and comprises an annular bulge extending into the through hole in the direction towards the ventilation bag; the protection part is arranged at the through hole, located between the annular protrusion and the ventilation bag and provided with protection rods arranged in a staggered mode, and the protection rods are used for preventing the ventilation bag from moving towards the fan; further, the ventilation bag 3D fabric on the seat can be prevented from entering the fan, so that the fan assembled on the seat is protected.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat ventilation technology, and in particular to a fan anti-foreign object device and a vehicle. Background Technology

[0002] To reduce air resistance in vehicle seat ventilation systems, the ventilation fan and ventilation bag are usually directly connected, meaning the fan's air inlet is pressed tightly against the ventilation bag or a layer of soft material is added in between for auxiliary sealing. However, under significant conditions (e.g., external force such as kneeling on the seat, a heavy passenger exerting pressure on the seat, or the vehicle traveling on bumpy roads), the 3D fabric of the ventilation bag or other foreign objects may enter the fan, causing abnormal fan noise or even stopping, resulting in loss of ventilation function.

[0003] Therefore, how to prevent the 3D fabric of the ventilation bag on the seat from entering the fan, in order to protect the fan assembled on the seat, is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a fan anti-foreign object device and vehicle to prevent the 3D fabric of the ventilation bag on the seat from entering the fan, thereby protecting the fan mounted on the seat.

[0005] To achieve the above objectives, this utility model provides a fan anti-foreign object device for mounting on a vehicle seat, comprising:

[0006] The mounting bracket includes a first side and a second side, the first side being used to be fixedly connected to the fan, and the mounting bracket being used to be connected to the frame of the seat via ribs, so that the second side abuts against the ventilation bag of the seat. The mounting bracket has a through hole for the fan and the ventilation bag to communicate with each other.

[0007] A buffer element, disposed between the mounting bracket and the fan, includes an annular protrusion extending into the through-hole in the direction toward the ventilation bag;

[0008] A protective element is provided at the through hole and is located between the annular protrusion and the ventilation bag. The protective element has staggered protective bars, which are used to prevent the ventilation bag from moving toward the fan.

[0009] In one possible implementation, the guard rod includes a first rod extending along a first direction and a second rod extending along a second direction. There are multiple first rods and multiple second rods. All the first rods are arranged sequentially at equal intervals in the second direction, and all the second rods are arranged sequentially at equal intervals in the first direction. The overlapping parts of the first rods and the second rods are connected and fixed to make the guard rod have a grid structure, with the first direction perpendicular to the second direction.

[0010] In one possible implementation, an annular groove is provided on the second side, which is connected to the through hole and the axes of the annular groove and the through hole are collinear. The annular groove includes a bottom surface perpendicular to the axis of the through hole and a circumferential surface of the annular groove connected to the bottom surface of the annular groove and connected to the second side. The annular protrusion is provided with a bearing surface, which is located on the side of the annular protrusion away from the fan and parallel to the bottom surface of the annular groove. The bearing surface is located between the bottom surface of the annular groove and the second side.

[0011] In one possible implementation, the annular protrusion is made of an elastic material, and a guide groove is provided on the circumferential surface of the annular groove. The guide groove also has an opening extending toward the ventilation bag. The ends of the first rod and the second rod extend into the corresponding guide groove to restrict the rotation of the protective member relative to the annular groove. The first rod and the second rod can move toward the fan in the direction of opening extension to compress the annular protrusion.

[0012] In one possible implementation, the ends of the first rod and the second rod are fixedly connected to the circumferential surface of the annular groove.

[0013] In one possible implementation, the mounting bracket is provided with a first mounting hole for fitting with a second mounting hole on the fan, and a connector passes through the first and second mounting holes to fix the mounting bracket and the fan relative to each other.

[0014] In one possible implementation, the first mounting hole is a stepped hole, which includes a first hole with a larger cross-sectional diameter perpendicular to its own axis and a second hole with a smaller cross-sectional diameter perpendicular to its own axis. The second hole is located between the first hole and the second mounting hole, and a shoulder is formed between the second hole and the first hole. The connector includes a first end, a connector connected to the first end, and a fixing body located on the periphery of the connector. The first end abuts against the shoulder, and the connector passes through the second hole and the second mounting hole, so that the fixing body abuts against the side of the second mounting hole away from the second hole.

[0015] In one possible implementation, the fixing frame is further provided with fixing holes for the ribs connected to the frame to pass through, so that the second side of the fixing frame abuts against the ventilation bag.

[0016] In one possible implementation, both the mounting bracket and the protective element are made of metal.

[0017] A vehicle, including a seat, and also including a fan anti-foreign object device as described in any of the above.

[0018] Compared to the aforementioned background technology, the fan anti-foreign object device provided by this utility model is used to be assembled onto a vehicle seat. It includes a fixing frame, a buffer, and a protective component. The fixing frame includes a first side and a second side facing each other. The first side is used to be fixedly connected to the fan. The fixing frame is also used to be connected to the seat frame through ribs, so that the second side abuts against the ventilation bag of the seat. The fixing frame has a through hole for the fan and the ventilation bag to communicate. The buffer is disposed between the fixing frame and the fan. The buffer includes an annular protrusion extending into the through hole in the direction toward the ventilation bag. The protective component is disposed at the through hole and is located between the annular protrusion and the ventilation bag. The protective component has staggered protective rods for preventing the ventilation bag from moving toward the fan.

[0019] Specifically, the first side of the mounting bracket is fixedly connected to the fan, and a buffer is provided between the mounting bracket and the fan. The mounting bracket is also connected to the seat frame by a rib. The rib causes the second side of the mounting bracket to abut against the ventilation bag. The fan is fixed relative to the ventilation bag, and the mounting bracket has a through hole for the fan and the ventilation bag to communicate. The buffer includes an annular protrusion extending into the through hole. A protective member is disposed between the annular protrusion and the ventilation bag, that is, between the fan and the ventilation bag. The protective member has staggered protective bars, which are used to prevent the ventilation bag from moving toward the fan, thereby preventing the 3D fabric of the ventilation bag on the seat from entering the fan and protecting the fan mounted on the seat. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the frame of the seat to which the fixing bracket provided in this embodiment of the utility model is assembled;

[0022] Figure 2 A structural schematic diagram of the frame of the fixing bracket provided in an embodiment of the present utility model being assembled to the seat from another perspective;

[0023] Figure 3 This is a schematic diagram of the structure of the fixing frame abutting against the ventilation bag provided in an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the fixing frame equipped with protective components provided in the embodiment of this utility model;

[0025] Figure 5This is a schematic diagram of the structure of the fixing frame provided in this embodiment of the utility model without the protective components;

[0026] Figure 6 This is a schematic diagram of the structure of the protective component provided in an embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the connector provided in an embodiment of the present utility model.

[0028] in:

[0029] 100-Fixed bracket, 120-Second side, 140-Annular groove, 141-Bottom surface of annular groove, 142-Circumferential surface of annular groove, 150-First mounting hole, 160-Fixed hole;

[0030] 200 - Frame, 210 - Ribs, 220 - Ventilation bag;

[0031] 300 - Buffer element, 310 - Annular protrusion;

[0032] 400 - Protective component, 410 - First rod, 420 - Second rod;

[0033] 500-fan;

[0034] 600-Connector, 610-First end, 620-Connector body, 630-Fixing body. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0038] The purpose of this invention is to provide a fan anti-foreign object device and vehicle to prevent the 3D fabric of the ventilation bag on the seat from entering the fan, thereby protecting the fan mounted on the seat.

[0039] It should be noted that in this embodiment, the X direction in the attached figure is defined as the first direction, and the Y direction is defined as the second direction. The first direction and the second direction are perpendicular to each other.

[0040] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 To achieve the above objectives, this utility model provides a fan anti-foreign object device for mounting on a vehicle seat. It includes a mounting bracket 100, a buffer 300, and a protective component 400. The mounting bracket 100 includes a first side and a second side 120. The first side is fixedly connected to a fan 500. The mounting bracket 100 is also connected to the seat frame 200 via ribs 210, allowing the second side 120 to abut against the seat's ventilation bag 220. The mounting bracket 100 has a through hole for communication between the fan 500 and the ventilation bag 220. The fan 500 typically includes a housing and a fan wheel. The fan wheel is mounted inside the housing and can rotate relative to the housing for suction or blowing air. The extension direction of the through hole is collinear with the extension direction of the fan wheel's axis to ensure gas flow between the ventilation bag 220 and the fan wheel. The cross-section of the through hole perpendicular to its own axis can be set to a circle to make the gas flow more uniform.

[0041] A buffer 300 is disposed between the mounting bracket 100 and the fan 500. The buffer 300 can be, but is not limited to, a rubber pad, a silicone ring, or a spring. The buffer 300 absorbs the vibration energy generated when the fan 500 is running, reducing or even preventing vibration from being transmitted to the mounting bracket 100 and potentially causing structural noise. The buffer 300 also prevents scratches or deformation caused by hard contact between the mounting bracket 100 and the fan 500. The buffer 300 includes an annular protrusion 310 extending into the through hole in the direction toward the ventilation bag 220.

[0042] The protective component 400 is disposed at the through hole and is located between the annular protrusion 310 and the ventilation bag 220. The protective component 400 has staggered protective rods, which are used to prevent the ventilation bag 220 from moving toward the fan 500. The protective component 400 formed by the staggered protective rods has ventilation holes, and gas can flow along the ventilation holes to keep the fan 500 and the ventilation bag 220 unobstructed. At the same time, the protective component 400 can prevent objects other than gas from contacting the fan 500 and prevent other objects from entering the fan 500 along the side of the fan 500 toward the ventilation bag 220. Both the fixing frame 100 and the protective component 400 are made of metal and the surface is treated with electrophoretic anti-rust treatment to improve the structural strength and service life of the fixing frame 100 and the protective component 400.

[0043] The first side of the mounting bracket 100 is fixedly connected to the fan 500, and a buffer 300 is provided between the mounting bracket 100 and the fan 500. The mounting bracket 100 is also connected to the seat frame 200 by a rib 210. The rib 210 causes the second side 120 of the mounting bracket 100 to abut against the ventilation bag 220. The fan 500 is fixed relative to the ventilation bag 220, and the mounting bracket 100 has a through hole for the fan 500 and the ventilation bag 220 to communicate. The buffer 300 includes an annular protrusion 310 extending into the through hole. A protective member 400 is disposed between the annular protrusion 310 and the ventilation bag 220, that is, the protective member 400 is disposed between the fan 500 and the ventilation bag 220. The protective member 400 has staggered protective bars, which are used to prevent the ventilation bag 220 from moving toward the fan 500, thereby preventing the 3D fabric of the ventilation bag 220 on the seat from entering the fan 500, so as to protect the fan 500 assembled on the seat.

[0044] Please see Figure 6 In one possible implementation, the protective rod includes a first rod 410 extending along a first direction and a second rod 420 extending along a second direction. There are multiple first rods 410 and second rods 420. All first rods 410 are arranged sequentially at equal intervals along the second direction, and all second rods 420 are arranged sequentially at equal intervals along the first direction. The overlapping portions of the first rods 410 and second rods 420 are connected and fixed to each other, so that the protective rod has a grid structure. The overlapping portions (intersections) of the first rods 410 and second rods 420 can be fixed by welding, so that the protective component 400 formed by the first rods 410 and second rods 420 is a single unit. The first rods 410 and second rods 420 can be of varying lengths, and similarly, the second rods 420 can be of varying lengths, to control the dimensions of the protective component 400 after welding the first rods 410 and second rods 420.

[0045] The distance between adjacent first rods 410 is equal to the distance between adjacent second rods 420, which can disperse external loads (such as impact force and pressure), reduce local stress concentration, and extend the service life of the protective component 400. At the same time, a square vent hole is formed in the middle of the protective component 400. The edges of the vent hole facing the fan 500 and the vent hole facing the ventilation bag 220 are both set as arc-shaped to reduce wind resistance and further improve the airflow guidance.

[0046] Please see Figure 5 In one possible implementation, the second side 120 is provided with an annular groove 140, which is connected to the through hole and is collinear with the axis of the through hole. The annular groove 140 includes a bottom surface 141 perpendicular to the axis of the through hole and a circumferential surface 142 connected to the bottom surface 141 and connected to the second side 120. The annular protrusion 310 is provided with a bearing surface, which is located on the side of the annular protrusion 310 away from the fan 500 and parallel to the bottom surface 141 of the annular groove. The bearing surface is located between the bottom surface 141 of the annular groove and the second side 120.

[0047] When the protective component 400 and the fixing frame 100 are separate structures, the annular protrusion 310 can be made of elastic material and a guide groove is provided on the circumferential surface 142 of the annular groove. The guide groove also has an opening extending toward the ventilation bag 220. That is, the guide groove has two open ends. One open end is located on the circumferential surface 142 of the annular groove, and the other open end is located on the second side 120 of the fixing frame 100. The inner wall of the side of the guide groove away from the ventilation bag 220 can be coplanar with the bottom surface 141 of the annular groove, so that the guide groove is deeper than the second side 120. The ends of the first rod 410 and the second rod 420 extend into the corresponding guide groove to restrict the rotation of the protective component 400 relative to the annular groove 140. The first rod 410 and the second rod 420 can move toward the fan 500 in the opening extension direction to compress the annular protrusion 310.

[0048] Specifically: when the protective member 400 is subjected to a force moving towards the fan 500, under the action of this force, the protective member 400 moves towards the fan 500 under the guidance of the guide groove until it abuts against the bearing surface. The annular groove 140 and the guide groove provide a buffer space for the protective member 400 to move towards the bearing surface. When the external force drives the protective member 400, which is abutting against the bearing surface, to continue moving towards the fan 500, the deformation of the annular protrusion 310 serves as a buffer for the movement of the protective member 400. When the protective member 400 further compresses the annular protrusion 310 and moves towards the fan 500, the protective member 400 will move away from the guide groove. While abutting against the inner wall of the ventilation bag 220, the protective member 400 also abuts against the bottom surface 141 of the annular groove, thus preventing the protective member 400 from moving relative to the fixed frame 100 toward the fan 500. At this time, the annular protrusion 310 has the maximum deformation. When the external force is removed, the annular protrusion 310 returns to its original deformation and pushes the protective member 400 toward the ventilation bag 220 in the process. In this way, through the cooperation of the protective member 400 with the annular groove 140, the guide groove, and the annular protrusion 310, the external force can be transmitted to the annular protrusion 310 and the fixed frame 100, thus avoiding the problem of the external force directly acting on the fan 500 and causing the fan 500 to deform.

[0049] In addition, the annular protrusion 310 can be thickened towards the circumferential surface 142 of the annular groove so that the cross-sectional diameter of the outer circumferential surface of the annular protrusion 310 perpendicular to its own axis is larger than the inner ring diameter of the bottom surface 141 of the annular groove. This allows part of the annular protrusion 310 to abut against the bottom surface 141 of the annular groove. When the protective member 400 presses the annular protrusion 310 and moves toward the fan 500, the bottom surface 141 of the annular groove can support the annular protrusion 310 to prevent the annular protrusion 310 from deforming and pressing against the fan 500. In this state, the protective member 400 and the bottom surface 141 of the annular groove can be prevented from contacting each other, which may cause the protective member 400 to deform.

[0050] When the protective component 400 and the fixed frame 100 are an integral structure, the ends of the first rod 410 and the second rod 420 are fixedly connected to the circumferential surface 142 of the annular groove, so that the external force acts directly on the protective component 400 and the protective component 400 transmits the external force to the fixed frame 100. This also avoids the problem of the external force acting directly on the fan 500 and causing the fan 500 to deform.

[0051] In one possible implementation, the mounting bracket 100 is provided with a first mounting hole 150, which is adapted to a second mounting hole on the fan 500. The connector 600 passes through the first mounting hole 150 and the second mounting hole to fix the mounting bracket 100 and the fan 500 relative to each other. There are four first mounting holes 150 and four second mounting holes, and the positions of the first mounting holes 150 and the second mounting holes correspond one-to-one to facilitate the insertion of the connector 600.

[0052] A positioning structure can be added to the side of the fan 500 and the mounting bracket 100 facing each other. The positioning structure can adopt a matching positioning groove and positioning element. That is, one of the fan 500 and the mounting bracket 100 is provided with a positioning groove, and the other is provided with a positioning element. The positioning element is inserted into the positioning groove for positioning the fan 500 and the mounting bracket 100, which facilitates the installation process of the connecting member 600. The positioning element can be a block, and the positioning groove can be a square groove. When the block is inserted into the corresponding square groove, it can restrict the relative rotation of the fan 500 and the mounting bracket 100. Alternatively, two positioning elements and two positioning grooves can be used, which can also achieve the purpose of restricting the relative rotation of the fan 500 and the mounting bracket 100.

[0053] Please see Figure 7 In one possible implementation, the first mounting hole 150 is a stepped hole, which includes a first hole with a larger cross-sectional diameter perpendicular to its own axis and a second hole with a smaller cross-sectional diameter perpendicular to its own axis. The second hole is located between the first hole and the second mounting hole, and a shoulder is formed between the second hole and the first hole. The connector 600 includes a first end 610, a connector 620 connected to the first end 610, and a fixing body 630 located on the outer periphery of the connector 620. The first end 610 abuts against the shoulder, and the connector 620 passes through the second hole and the second mounting hole, so that the fixing body 630 abuts against the side of the second mounting hole away from the second hole.

[0054] The connector 600 can be, but is not limited to, a rubber nail. The connector 620 of the rubber nail is relatively long, so that the end of the connector 620 away from the first end 610 can extend through the second hole and the second mounting hole to the side of the second mounting hole away from the second hole. By pulling the connector 620 extending to the side of the second mounting hole away from the second hole, the first end 610 can be driven to abut against the shaft shoulder, and the fixing body 630 located on the outer periphery of the connector 620 can be deformed and then pass through to the side of the second mounting hole away from the second hole. The deformation of the fixing body 630 can be restored so that the fixing body 630 can abut against the side of the second mounting hole away from the second hole. Thus, the fan 500 and the fixing bracket 100 are relatively fixed through the first end 610 and the fixing body 630.

[0055] In one possible implementation, the fixing frame 100 is further provided with fixing holes 160 for the ribs 210 connected to the frame 200 to pass through. The frame 200 refers to the frame 200 of the seat, which is usually made of sheet metal. Multiple fixing holes 160 can be provided, and the extension directions of the multiple fixing holes 160 are parallel or perpendicular to each other. The ribs 210 fixed at different positions in the frame 200 pass through the corresponding fixing holes 160, so that the fixing frame 100 is fixed relative to the frame 200. At the same time, the ribs 210 have a certain elasticity in the direction of the ventilation bag 220, so that the second side 120 of the fixing frame 100 abuts against the ventilation bag 220.

[0056] This application also provides a vehicle, which includes a seat and a fan anti-foreign object device as described above, which also has the beneficial effects of the fan anti-foreign object device, and will not be described in detail here.

[0057] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0059] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A fan foreign matter prevention device for mounting to a seat of a vehicle, characterized by, The application relates to a fixing frame (100) comprising opposite first and second sides (120), the first side being used for fixed connection with a fan (500), the fixing frame (100) being further used for connection with a skeleton (200) of a seat through a rib (210), the second side (120) being abutted to a ventilation bag (220) of the seat, the fixing frame (100) being provided with a through hole for communication between the fan (500) and the ventilation bag (220); a buffer (300) is arranged between the fixing frame (100) and the fan (500), the buffer (300) comprising an annular protrusion (310) extending into the through hole in a direction towards the ventilation bag (220); a protection piece (400) is arranged at the through hole, and the protection piece (400) is located between the annular protrusion (310) and the ventilation bag (220), the protection piece (400) having staggered protection rods for blocking movement of the ventilation bag (220) towards the fan (500). The protection rods comprise first rod bodies (410) extending in a first direction and second rod bodies (420) extending in a second direction, the first rod bodies (410) and the second rod bodies (420) are both multiple, all the first rod bodies (410) are arranged in the second direction at equal intervals, all the second rod bodies (420) are arranged in the first direction at equal intervals, the first rod bodies (410) and the second rod bodies (420) are connected and fixed at overlapping positions to form a grid structure, and the first direction is perpendicular to the second direction. The second side (120) is provided with an annular groove (140) in communication with the through hole and having an axis line same as that of the through hole, the annular groove (140) comprises an annular groove bottom surface (141) perpendicular to the axis line of the through hole and an annular groove circumferential surface (142) connected to the annular groove bottom surface (141) and connected to the second side (120), the annular protrusion (310) is provided with a bearing surface located on a side of the annular protrusion (310) away from the fan (500) and parallel to the annular groove bottom surface (141), and the bearing surface is located between the annular groove bottom surface (141) and the second side (120). The annular protrusion (310) is made of elastic material, the annular groove circumferential surface (142) is provided with a guide groove having an opening extending towards the ventilation bag (220), and the end portions of the first rod bodies (410) and the second rod bodies (420) extend into the corresponding guide grooves to limit rotation of the protection piece (400) relative to the annular groove (140), and the first rod bodies (410) and the second rod bodies (420) can move towards the fan (500) in the opening extending direction to compress the annular protrusion (310).

2. The fan foreign object debris prevention device of claim 1, wherein, ​ 3. The fan anti-fouling device of claim 2, wherein, ​ 4. The fan anti-fouling device of claim 3, wherein, ​ 5. The fan anti-foreign matter device according to claim 3, characterized by Ends of the first rod body (410) and the second rod body (420) are fixedly connected to the ring groove circumferential surface (142).

6. The fan anti-fouling device of any one of claims 1-5, wherein, The fixing frame (100) is provided with a first mounting hole (150), the first mounting hole (150) is used for being matched with a second mounting hole on the fan (500), a connecting piece (600) is arranged in the first mounting hole (150) and the second mounting hole, so that the fixing frame (100) and the fan (500) are relatively fixed.

7. The fan anti-fouling device of claim 6, wherein, The first mounting hole (150) is a stepped hole, the stepped hole includes a first hole with a larger diameter of a cross section perpendicular to an axis of the first hole and a second hole with a smaller diameter of a cross section perpendicular to an axis of the second hole, the second hole is located between the first hole and the second mounting hole, and an axial shoulder is formed between the second hole and the first hole, the connecting piece (600) includes a first end head (610), a connecting body (620) connected to the first end head (610), and a fixing body (630) located at an outer periphery of the connecting body (620), the first end head (610) abuts against the axial shoulder, and the connecting body (620) is arranged in the second hole and the second mounting hole, so that the fixing body (630) abuts against a side of the second mounting hole away from the second hole.

8. The fan foreign object debris prevention device of claim 6, wherein, The fixing frame (100) is further provided with a fixing hole (160), the fixing hole (160) is used for being arranged in the rib (210) connected to the framework (200), so that the second side (120) of the fixing frame (100) abuts against the ventilation bag (220).

9. The fan anti-fouling device of claim 6, wherein, The fixing frame (100) and the protection piece (400) are both made of metal.

10. A vehicle comprising a seat, characterized in that The fan anti-foreign matter device also includes the fan anti-foreign matter device according to any one of claims 1-9. The fan anti-foreign matter device also includes the fan anti-foreign matter device according to any one of claims 1-9.

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