A fan anti-pressing device

Abstract

The utility model discloses a fan anti extrusion device, including positioning board, first locating foot and second locating foot of connection in positioning board, positioning board is used for assembling to one side of the side of plastic grid of fan, makes fan fixed to positioning board, and positioning board is connected with the protection frame, and the protection frame is used for covering the side of plastic grid away from fan, and the protection frame includes first carrier and second carrier of interconnection, and first carrier and second carrier cross arrangement to form the protection structure with the air vent, and the protection structure is used for protecting plastic grid, and the air vent is used for the gas to go in and out plastic grid, and first locating foot is used for being connected with first metal sheet on seat back, and second locating foot is used for being connected with second metal sheet on seat back, makes positioning board fixed to seat back, the protection structure can transmit external force to positioning board, further conduction to first metal sheet and second metal sheet of seat skeleton, can prevent fan extrusion deformation under stress.

Description

Technical Field

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

[0002] In car seat ventilation systems, the seat back fan typically has a protective grid structure at the fan inlet to prevent foreign objects from entering the fan. New energy vehicles generally have a "double bed" configuration, where passengers move from the front seat to the back seat or move back and forth on the seat. The protective grid material of the fan is the same as the fan housing, which is plastic. When subjected to external force, this force is transmitted to the fan housing. If the force is small, the deformation of the fan housing is also small, but if the force is large, the deformation of the fan housing will be large. In severe cases, it can cause the fan impeller to interfere with and rub against the housing, resulting in abnormal fan noise or even stopping the fan, and loss of ventilation function.

[0003] Therefore, how to prevent the fan from being squeezed and deformed 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-squeezing device that can prevent the fan from being squeezed and deformed under force.

[0005] To achieve the above objectives, this utility model provides a fan anti-pinch device, including a positioning plate, a first positioning foot and a second positioning foot connected to the positioning plate. The positioning plate is used to assemble onto the side of the fan with a plastic grille, so that the fan is fixed to the positioning plate. The positioning plate is connected to a protective frame, which is used to cover the side of the plastic grille away from the fan. The protective frame includes a first carrier and a second carrier connected to each other. The first carrier and the second carrier are arranged crosswise to form a protective structure with a vent. The protective structure is used to protect the plastic grille, and the vent is used to allow gas to enter and exit the plastic grille. The first positioning foot is used to connect to a first sheet metal on the seat back, and the second positioning foot is used to connect to a second sheet metal on the seat back, so that the positioning plate is fixed to the seat back.

[0006] In one possible implementation, the positioning plate has an opening corresponding to the plastic grille, the opening being used to allow one end of the plastic grille away from the fan to extend to the side of the positioning plate away from the fan. The protective frame also includes a frame body connected to the positioning plate and located on the outer periphery of the plastic grille, and the first bearing and the second bearing are disposed on the side of the frame body away from the positioning plate.

[0007] In one possible implementation, the positioning plate has a groove on the side away from the fan, and the frame body has a protrusion that fits into the groove at the end facing the positioning plate. The protrusion can be inserted into the groove to restrict the frame body from moving toward the positioning plate.

[0008] In one possible implementation, the first carrier extends along a first direction, and the second carrier extends along a second direction. There are multiple first and second carriers, and all the first carriers are arranged at equal intervals in the second direction, and all the second carriers are arranged at equal intervals in the first direction. The first and second directions are perpendicular to each other.

[0009] In one possible implementation, the positioning plate is provided with a positioning element and a first fixing hole. The positioning element is used to insert into the positioning groove opened on the side of the fan facing the positioning plate, so that the positioning plate and the fan are positioned relative to each other. The first fixing hole is used to match the second fixing hole opened on the fan. The fixing element passes through the first fixing hole and the second fixing hole, so that the positioning plate and the fan are relatively fixed after positioning.

[0010] In one possible implementation, the first positioning foot includes a first plate and a second plate. The first plate is connected to a positioning plate, and the second plate is connected to the end of the first plate away from the positioning plate. The side of the second plate away from the first plate is used to fit against the first sheet metal. The second plate is provided with a first mounting hole, which is used to match a second mounting hole opened on the first sheet metal. A first connector passes through the first mounting hole and the second mounting hole for fixing the second plate and the first sheet metal relative to each other.

[0011] In one possible implementation, the first plate extends toward a third direction, and the first plate and the fan are disposed on the same side relative to the positioning plate. The distance between the end of the first plate away from the positioning plate and the positioning plate in the third direction is greater than the distance between the side of the fan away from the positioning plate and the positioning plate in the third direction, so that the fan is located between the positioning plate and the first sheet metal and there is a gap between them. The third direction is perpendicular to the first direction and the second direction.

[0012] In one possible implementation, the second positioning foot includes a third plate and a fourth plate. The third plate is connected to the positioning plate, and the fourth plate is connected to the end of the third plate away from the positioning plate. The fourth plate is used to fit against the second sheet metal. The fourth plate is provided with a third mounting hole, which is adapted to a fourth mounting hole opened on the second sheet metal. The second connector passes through the third mounting hole and the fourth mounting hole for fixing the fourth plate and the second sheet metal relative to each other.

[0013] In one possible implementation, the third plate includes a first bent body and a second bent body connected together. Both the first bent body and the second bent body are set at an angle to the third direction, and the first bent body and the second bent body are capable of bending deformation and recovery relative to each other.

[0014] In one possible implementation, the positioning plate and the protective frame are integrated into one unit.

[0015] Compared to the aforementioned background technology, the fan anti-pinch device provided by this utility model includes a positioning plate, a first positioning foot and a second positioning foot connected to the positioning plate. The positioning plate is used to assemble onto the side of the fan with a plastic grille, so that the fan is fixed to the positioning plate. The positioning plate is connected to a protective frame, which is used to cover the side of the plastic grille away from the fan. The protective frame includes a first carrier and a second carrier connected to each other. The first carrier and the second carrier are arranged crosswise to form a protective structure with a vent. The protective structure is used to protect the plastic grille. The vent is used to allow gas to enter and exit the plastic grille. The first positioning foot is used to connect to a first sheet metal on the seat back, and the second positioning foot is used to connect to a second sheet metal on the seat back, so that the positioning plate is fixed to the seat back.

[0016] Specifically, the positioning plate is fixed relative to the first and second sheet metal parts of the seat back by connecting the first positioning foot to the positioning plate and the second positioning foot to the second sheet metal parts of the seat back. This fixes the positioning plate relative to the first and second sheet metal parts, and thus fixes the positioning plate relative to the seat back. By fixing the fan to the positioning plate, the fan can be fixed relative to the seat back. The fan is equipped with a plastic grille, and the positioning plate is connected to a protective frame that covers the side of the plastic grille away from the fan. The first and second carriers of the protective frame are cross-arranged to form a protective structure. The protective structure allows air to enter and exit the vent of the plastic grille without affecting the normal use of the fan. At the same time, the protective structure can prevent objects other than air from contacting the plastic grille and can transmit external force to the positioning plate, and further to the first and second sheet metal parts of the seat frame, thus preventing the fan from being squeezed and deformed by force. Attached Figure Description

[0017] 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.

[0018] Figure 1 A schematic diagram of the fan anti-pinch device provided in this embodiment of the present invention assembled onto the seat back;

[0019] Figure 2 This is a schematic diagram of the fan anti-pinch device provided in this embodiment of the present invention assembled onto the seat back from another perspective.

[0020] Figure 3 This is a schematic diagram of the fan anti-pinch device and the fan after it is fixed, provided in an embodiment of the present utility model;

[0021] Figure 4This is a schematic diagram of the fan anti-pinch device and the fan after it is fixed, provided in an embodiment of the present invention.

[0022] in:

[0023] 100 - Positioning plate, 110 - First fixing hole;

[0024] 200 - First positioning foot, 210 - First plate, 220 - Second plate, 221 - First mounting hole;

[0025] 300 - Second positioning foot, 310 - Third plate, 311 - First bent body, 312 - Second bent body, 320 - Fourth plate, 321 - Third mounting hole;

[0026] 400 - Fan, 410 - Plastic grille;

[0027] 500 - Protective frame, 510 - First load-bearing body, 520 - Second load-bearing body, 530 - Frame body;

[0028] 600 - First Sheet Metal;

[0029] 700 - Second sheet metal. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] The purpose of this invention is to provide a fan anti-squeezing device that can prevent the fan from being squeezed and deformed under force.

[0034] It should be noted that in this embodiment, the X direction in the attached figure is defined as the first direction, the Y direction as the second direction, and the Z direction as the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0035] Please see Figures 1 to 4 To achieve the above objectives, this utility model provides a fan anti-pinch device, including a positioning plate 100, a first positioning foot 200 and a second positioning foot 300 connected to the positioning plate 100. All three—the positioning plate 100, the first positioning foot 200, and the second positioning foot 300—can be made of metal and have undergone electrophoretic anti-rust treatment. There are two first positioning feet 200, each located at one end of the positioning plate 100 in the second direction. There are also two second positioning feet 300, each located at the other end of the positioning plate 100 in the second direction. The positioning plate 100 is used to mount the fan 400 to the side where the plastic grille 410 is mounted, thus fixing the fan 400 to the positioning plate 100. The fan 400 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 housing has a plastic grille 410 mounted on its third-direction side to form a protective barrier against airflow. The wind turbine is protected by a positioning plate 100 connected to a protective frame 500. The protective frame 500 covers the side of the plastic grille 410 away from the fan 400. The protective frame 500 includes a first support body 510 and a second support body 520 connected to each other. The first support body 510 and the second support body 520 can be made of metal to ensure the structural strength of the first support body 510 and the second support body 520. The first support body 510 and the second support body 520 are arranged crosswise to form a protective structure with a vent. The protective structure is used to protect the plastic grille 410. The vent is used to allow gas to enter and exit the plastic grille 410. The first positioning foot 200 is used to connect with the first sheet metal 600 on the seat back, and the second positioning foot 300 is used to connect with the second sheet metal 700 on the seat back, so that the positioning plate 100 is fixed to the seat back. The first sheet metal 600 and the second sheet metal 700 are sheet metal parts.

[0036] The positioning plate 100 is fixed relative to the first sheet metal 600 on the seat back by a first positioning foot 200 connected to the positioning plate 100, and the positioning plate 100 is fixed relative to the first sheet metal 600 and the second sheet metal 700 by a second positioning foot 300 connected to the positioning plate 100. This, in turn, fixes the positioning plate 100 relative to the seat back. By fixing the fan 400 to the positioning plate 100, the fan 400 is fixed relative to the seat back. The fan 400 is equipped with a plastic grille 410, and the positioning plate 100 is connected to cover it. The protective frame 500 on the side of the plastic grille 410 away from the fan 400 has a first support body 510 and a second support body 520 of the protective frame 500 arranged crosswise to form a protective structure. The protective structure allows gas to enter and exit the vent of the plastic grille 410 without affecting the normal use of the fan 400. At the same time, the protective structure can prevent other objects besides gas from contacting the plastic grille 410 and can transmit external force to the positioning plate 100, and further transmit it to the first sheet metal 600 and the second sheet metal 700 of the seat frame, which can prevent the fan 400 from being squeezed and deformed by force.

[0037] In one possible implementation, the positioning plate 100 has an opening corresponding to the plastic grille 410. The projection of the outer peripheral surface of the plastic grille 410 along a third direction is generally circular. The positioning plate 100 is located on the side of the fan 400 in the third direction, and the positioning plate 100 adopts a plate structure perpendicular to the third direction. That is, the projection of the outer peripheral surface of the plastic grille 410 on the positioning plate 100 is generally circular. The opening on the positioning plate 100 has a diameter larger than the diameter of the circular projection, so that the opening is used to allow the end of the plastic grille 410 away from the fan 400 to extend to the side of the positioning plate 100 away from the fan 400. The protective frame 500 also includes a frame body 530 connected to the positioning plate 100 and located on the outer periphery of the plastic grille 410. The body 530 has a certain thickness in the third direction, so that the distance between the side of the frame body 530 away from the fan 400 and the fan 400 in the third direction is greater than the distance between the side of the plastic grille 410 away from the fan 400 and the fan 400 in the third direction. The first support body 510 and the second support body 520 are set on the side of the frame body 530 away from the positioning plate 100, so that the first support body 510 and the second support body 520 cover the side of the plastic grille 410 away from the fan 400, thereby achieving the coverage of the side of the plastic grille 410 away from the fan 400 by the protective frame 500. It should be noted that the above coverage is not a seal. The protective structure formed by the cross arrangement of the first support body 510 and the second support body 520 has a vent.

[0038] The frame body 530 includes a first side facing the fan 400 and a second side away from the fan 400. The frame body 530 has a tapered structure in the third direction, and the size of the second side of the frame body 530 is smaller than the size of the first side. That is, the projected size of the second side of the frame body 530 in the third direction is smaller than the projected size of the first side of the frame body 530 in the third direction. The size of the second side of the frame body 530 is smaller than the size of the first side of the frame body 530. The size of the second side of the frame body 530 is equal to the size of the first side of the frame body 530, which helps to reduce the length of the first support 510 and the second support 520 and avoids the easy bending of the first support 510 and the second support 520 when they are longer.

[0039] In one possible implementation, the positioning plate 100 has a groove on the side facing away from the fan 400, and the frame body 530 has a protrusion adapted to the groove at the end facing the positioning plate 100. The protrusion can be inserted into the groove to restrict the movement of the frame body 530 toward the positioning plate 100. The protrusion can also have a certain deformation recovery capability. After being deformed by the protrusion, it enters the groove and recovers in the groove. It can be used for the engagement of the protrusion and the groove, thereby fixing the positioning plate 100 and the frame body 530 relatively. In addition, the positioning plate 100 and the protective frame 500 can also be set as a whole, that is, the positioning plate 100 and the protective frame 500 are a fixed whole.

[0040] In one possible implementation, the first support body 510 extends along a first direction, and the second support body 520 extends along a second direction. There are multiple first support bodies 510 and second support bodies 520, and all first support bodies 510 are arranged at equal intervals in the second direction, and all second support bodies 520 are arranged at equal intervals in the first direction. The ends of the first support bodies 510 and the second support bodies 520 are fixed to the frame body 530. The intersections of the first support bodies 510 and the second support bodies 520 can be fixed by welding, so that the protective structure formed by the first support bodies 510 and the second support bodies 520 is a whole.

[0041] In one possible implementation, the positioning plate 100 is provided with a positioning element and a first fixing hole 110. The positioning element is used to insert into a positioning groove opened on the side of the fan 400 facing the positioning plate 100, so that the positioning plate 100 and the fan 400 are positioned relative to each other. 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 positioning plate 100 and the fan 400. Two positioning elements and two positioning grooves can also be used, which can also achieve the purpose of restricting the relative rotation of the positioning plate 100 and the fan 400. The first fixing hole 110 is used to match the second fixing hole opened on the fan 400. When the positioning element is inserted into the positioning groove, the first fixing hole 110 and the second fixing hole are aligned. The fixing element passes through the first fixing hole 110 and the second fixing hole, so that the positioning plate 100 and the fan 400 are relatively fixed after positioning. The first fixing hole 110 and the second fixing hole can be, but are not limited to, threaded holes, and the fixing element can be, but are not limited to, bolts.

[0042] Furthermore, the first fixing hole 110 can be a stepped hole, that is, the first fixing hole 110 includes a first hole with a larger cross-sectional size and a second hole with a smaller cross-sectional size. The first hole is located on the side of the second hole away from the fan 400, and a shoulder is formed between the first hole and the second hole. The fixing member includes an end and a screw connected to the end. The end abuts against the shoulder position, and the screw is screwed into the second hole and connected to the second fixing hole, so that the positioning plate 100 and the fan 400 are relatively fixed.

[0043] In one possible implementation, two first positioning feet 200 are spaced apart in a first direction. Each first positioning foot 200 includes a first plate 210 and a second plate 220. The first plate 210 is connected to the positioning plate 100, and the second plate 220 is connected to the end of the first plate 210 facing away from the positioning plate 100. The side of the second plate 220 facing away from the first plate 210 is used to fit against the first sheet metal 600. The second plate 220 is provided with a first mounting hole 221, which is used to match the second mounting hole opened on the first sheet metal 600. A first connector passes through the first mounting hole 221 and the second mounting hole for fixing the second plate 220 and the first sheet metal 600 relative to each other. The first mounting hole 221 and the second mounting hole can be, but are not limited to, threaded holes, and the first connector can be, but is not limited to, a bolt.

[0044] Furthermore, the first plate 210 extends in the third direction, and the first plate 210 and the fan 400 are arranged on the same side relative to the positioning plate 100. The distance between the end of the first plate 210 away from the positioning plate 100 and the positioning plate 100 in the third direction is greater than the distance between the side of the fan 400 away from the positioning plate 100 and the positioning plate 100 in the third direction. This is to ensure that the fan 400 is located between the positioning plate 100 and the first sheet metal 600, and there is a gap between the fan 400 and the first sheet metal 600. This gap can serve as a buffer space when the positioning plate 100 and the fan 400 move towards the first sheet metal 600 as a whole, so as to avoid external force acting on the positioning plate 100 and the fan 400 and directly causing compression between the fan 400 and the first sheet metal 600 when the external force is too large.

[0045] In one possible implementation, two second positioning feet 300 are spaced apart in a first direction, and the distance between the two second positioning feet 300 is greater than the distance between the two first positioning feet 200. Each second positioning foot 300 includes a third plate 310 and a fourth plate 320. The third plate 310 is connected to the positioning plate 100, and the fourth plate 320 is connected to the end of the third plate 310 away from the positioning plate 100. The fourth plate 320 is used to fit against the second sheet metal 700. The fourth plate 320 is provided with a third mounting hole 321, which is adapted to a fourth mounting hole opened on the second sheet metal 700. A second connector passes through the third mounting hole 321 and the fourth mounting hole to fix the fourth plate 320 and the second sheet metal 700 relative to each other. The third mounting hole 321 and the fourth mounting hole may be, but are not limited to, threaded holes, and the second connector may be, but is not limited to, a bolt.

[0046] Furthermore, the third plate 310 includes a first bending body 311 and a second bending body 312 connected to each other. Both the first bending body 311 and the second bending body 312 are set at an angle to the third direction, and the first bending body 311 and the second bending body 312 can bend and deform relative to each other and recover. When an external force is transmitted to the positioning plate 100 and the fan 400 along the third direction, and the external force is too large, causing the positioning plate 100 and the fan 400 to have to move toward the first sheet metal 600, the bending angle between the first bending body 311 and the second bending body 312 increases, so as to buffer the movement of the positioning plate 100 and the fan 400. When the external force is removed, the first bending body 311 and the second bending body 312 recover, so that the positioning plate 100 and the fan 400 return to their original positions. In this way, the positioning plate 100 and the fan 400 can be protected to avoid irreversible deformation that causes the positioning plate 100 and the fan 400 to change positions and affect the function of the fan 400.

[0047] 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.

[0048] 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.

[0049] 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 anti-pinch device, characterized in that, The device includes a positioning plate (100), a first positioning foot (200) and a second positioning foot (300) connected to the positioning plate (100). The positioning plate (100) is used to assemble onto the side of the fan (400) where the plastic grille (410) is mounted, so that the fan (400) is fixed to the positioning plate (100). The positioning plate (100) is connected to a protective frame (500). The protective frame (500) is used to cover the side of the plastic grille (410) away from the fan (400). The protective frame (500) includes a first carrier (5) connected to it. 10) and the second carrier (520), the first carrier (510) and the second carrier (520) are arranged crosswise to form a protective structure with a vent, the protective structure is used to protect the plastic grille (410), the vent is used to allow gas to enter and exit the plastic grille (410), the first positioning foot (200) is used to connect with the first sheet metal (600) on the seat back, and the second positioning foot (300) is used to connect with the second sheet metal (700) on the seat back, so that the positioning plate (100) is fixed to the seat back.

2. The fan anti-pinch device according to claim 1, characterized in that, The positioning plate (100) has an opening corresponding to the plastic grille (410). The opening is used to allow one end of the plastic grille (410) away from the fan (400) to extend to the side of the positioning plate (100) away from the fan (400). The protective frame (500) also includes a frame body (530) connected to the positioning plate (100) and located on the outer periphery of the plastic grille (410). The first support body (510) and the second support body (520) are located on the side of the frame body (530) away from the positioning plate (100).

3. The fan anti-pinch device according to claim 2, characterized in that, The positioning plate (100) has a groove on the side away from the fan (400), and the frame body (530) has a protrusion adapted to the groove at one end facing the positioning plate (100). The protrusion can be inserted into the groove to restrict the frame body (530) from moving toward the positioning plate (100).

4. The fan anti-pinch device according to claim 2, characterized in that, The first carrier (510) extends along a first direction, and the second carrier (520) extends along a second direction. There are multiple first carriers (510) and second carriers (520), and all the first carriers (510) are equally spaced in the second direction, and all the second carriers (520) are equally spaced in the first direction. The first direction and the second direction are perpendicular to each other.

5. The fan anti-pinch device according to any one of claims 1-4, characterized in that, The positioning plate (100) is provided with a positioning element and a first fixing hole (110). The positioning element is used to insert into the positioning groove opened on the side of the fan (400) facing the positioning plate (100) so that the positioning plate (100) and the fan (400) are positioned relative to each other. The first fixing hole (110) is used to match the second fixing hole opened on the fan (400). The fixing element passes through the first fixing hole (110) and the second fixing hole so that the positioning plate (100) and the fan (400) are relatively fixed after positioning.

6. The fan anti-pinch device according to claim 4, characterized in that, The first positioning foot (200) includes a first plate (210) and a second plate (220). The first plate (210) is connected to the positioning plate (100). The second plate (220) is connected to the end of the first plate (210) away from the positioning plate (100). The side of the second plate (220) away from the first plate (210) is used to fit against the first sheet metal (600). The second plate (220) is provided with a first mounting hole (221). The first mounting hole (221) is used to be adapted to a second mounting hole opened on the first sheet metal (600). A first connecting member passes through the first mounting hole (221) and the second mounting hole for fixing the second plate (220) and the first sheet metal (600) relative to each other.

7. The fan anti-pinch device according to claim 6, characterized in that, The first plate (210) extends toward a third direction, and the first plate (210) and the fan (400) are disposed on the same side relative to the positioning plate (100). The distance between the end of the first plate (210) away from the positioning plate (100) and the positioning plate (100) in the third direction is greater than the distance between the side of the fan (400) away from the positioning plate (100) and the positioning plate (100) in the third direction, so that the fan (400) is located between the positioning plate (100) and the first sheet metal (600) and there is a gap between the fan (400) and the first sheet metal (600). The third direction is perpendicular to the first direction and the second direction.

8. The fan anti-pinch device according to claim 7, characterized in that, The second positioning foot (300) includes a third plate (310) and a fourth plate (320). The third plate (310) is connected to the positioning plate (100), and the fourth plate (320) is connected to the end of the third plate (310) away from the positioning plate (100). The fourth plate (320) is used to fit against the second sheet metal (700). The fourth plate (320) is provided with a third mounting hole (321). The third mounting hole (321) is used to match the fourth mounting hole opened on the second sheet metal (700). The second connector passes through the third mounting hole (321) and the fourth mounting hole to fix the fourth plate (320) and the second sheet metal (700) relative to each other.

9. The fan anti-pinch device according to claim 8, characterized in that, The third plate (310) includes a first bent body (311) and a second bent body (312) connected to each other. The first bent body (311) and the second bent body (312) are both set at an angle to the third direction, and the first bent body (311) and the second bent body (312) can be bent and deformed and restored relative to each other.

10. The fan anti-pinch device according to claim 1, characterized in that, The positioning plate (100) and the protective frame (500) are integrated into one piece.

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