Modular fan assembly structure based on sliding snap

Abstract

A modular fan splicing structure based on a sliding live buckle, comprising a plurality of fan units, each of the fan units has a buckle piece with a slidable live buckle on one side wall and a clamping groove matched with the live buckle on the other side wall, and two adjacent fan units are spliced and fixed by inserting the live buckle on one of the fan units into the clamping groove on the other fan unit, and the side surfaces of the buckle piece and the clamping groove are provided with first and second electrical connection terminals, through the above technical solution, the slidable live buckle and the matched clamping groove are integrated on both sides of the fan, the zero-tool disassembly and assembly of "alignment and locking, pulling and separation" between the fans is realized, the electrical connection is simultaneously completed at the moment of splicing through the integrated electrical connection terminals on the same side, the independent wiring requirement is eliminated, the modular infinite expansion architecture is constructed, and the rapid networking and maintenance of any number of fans are supported.

Description

Technical Field

[0001] This utility model relates to the field of heat sinks, specifically a modular fan splicing structure based on a sliding latch. Background Technology

[0002] The demand for modular fan assembly in equipment such as heat sinks and chassis is growing.

[0003] Currently, the fans used in heat dissipation equipment rely on separate fasteners (such as individual clips or screws) for their assembly structure, which is cumbersome and inconvenient to install and disassemble. At the same time, when multiple fans are assembled, power cables still need to be connected to each one, resulting in messy cables, limited expansion, and affecting the heat dissipation efficiency and aesthetics of the equipment.

[0004] To address this, we propose a modular fan splicing structure based on sliding snap fasteners. By integrating slidable snap fasteners and matching slots on both sides of the fan, we achieve quick assembly and disassembly between fans by "aligning and locking, and pulling to separate". With the electrical connection terminals integrated on the same side, the circuit is connected simultaneously at the moment of splicing, completely eliminating the need for independent power supply lines and achieving simple and efficient modular expansion. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a modular fan splicing structure based on sliding buckles.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A modular fan assembly structure based on a sliding latch includes multiple fan units. Each fan unit includes fan blades and a fan frame. On opposite side walls of each fan unit, one side is provided with a latching component containing a slidable latch, and the other side is provided with a slot adapted to the latch. The latching component includes a latch, a spring, and a base. The latch consists of an L-shaped base and a hook with a guide structure fixed to the base. The base includes a protruding plastic support wall inside the fan frame, a latch sliding hole and a groove formed between the upper and lower covers for the latch to slide, and a plastic limiting wall to restrict excessive displacement of the latch. The L-shaped base is set on the groove inside the fan frame. The hook extends from the latch sliding hole. One end of the spring is connected to the inside of the L-shaped base, and the other end is connected to the plastic support wall. The latch can slide on the fan frame and be driven to reset by the spring. Two of the latches... Adjacent fan units are joined and fixed by inserting the snap fastener on one fan unit into the slot on the adjacent fan unit. The connection structure on both sides of the fan unit allows for the joining of any number of fans. Each fan unit also has a first electrical connection terminal and a second electrical connection terminal on both sides. When adjacent fan units are joined and fixed, the first electrical connection terminal and the second electrical connection terminal of the adjacent fan unit are connected, allowing for cascading of multiple fan units with only one power supply line. The joining and fixing is achieved by the relative movement of two fan units in a parallel direction. The joining and fixing is released by the opposite movement of the two fan units in a parallel direction, causing the snap fastener to slide out of the slot. The guide structure of the snap fastener cooperates with the guide curved surface of the slot's inner wall, enabling quick disassembly with alignment and locking, and pull-out separation.

[0008] In one embodiment, the latch further includes a base and a spring. The base is a fixing structure for the fan frame, which consists of a protruding plastic support wall inside the fan frame, a sliding hole and groove for the latch to slide between the upper and lower covers, and a plastic limiting wall to restrict excessive displacement of the latch. The L-shaped base of the latch is disposed on the groove inside the fan frame, and the latch hook extends from the sliding hole. The spring connects the plastic support wall of the base and the L-shaped base of the latch, providing an elastic restoring force for the latch. The latch can slide on the fan frame and be driven to return to its original position by the spring. The latch is slidably disposed on the groove of the base, and the latch hook is provided with a guide structure. During disassembly, it slides along the inclined surface of the guide structure under the action of external force and compresses the spring to disengage from the groove.

[0009] In one embodiment, the fan frame includes an assemblable upper cover and a lower cover; the inner sides of the upper and lower covers are symmetrically provided with sliding grooves, which are distributed perpendicularly to the center of the fan and mirror images of each other. The sliding grooves restrict the degrees of freedom of the fasteners except for those parallel to the splicing direction; the fasteners are slidably installed in the sliding grooves, and their sliding stroke is constrained by limiting blocks at both ends of the sliding grooves to ensure that the fasteners move within a preset range; the lower cover is provided with a spring limiting structure for applying a reverse force to the spring to drive the fasteners to move in the engaging direction. The positioning structure is a plastic support wall that abuts against the spring. It is integrally formed with the lower cover through injection molding. The wall thickness transitions evenly to the base surface of the frame, with no stress concentration areas. The one-piece manufacturing is simple and cost-effective. The plastic support wall applies a reverse force to the spring, driving the buckle to move in the locking direction. The slot is formed by the mirrored grooves of the upper and lower covers. After the joint is assembled, the groove seam transitions smoothly without any height difference. Its inner wall is a continuous guide surface. The radius of curvature of this surface gradually increases from the slot inlet to the locking position, forming a compression guide slope that is steep at first and then gentle.

[0010] In one embodiment, the height of the vertex of the guide surface is greater than the thickness of the snap fastener, so that the spring compression reaches its maximum value when the snap fastener passes the vertex.

[0011] In one embodiment, during assembly, after the snap fasteners of adjacent fan units contact the guide curved surface, they are pressed and retract along the slide groove, compressing the spring. During the retraction of the snap fasteners, the L-shaped base maintains surface contact with the side wall of the slide groove to prevent skewing and jamming. When the snap fasteners pass the apex of the curved surface, the spring's stored energy reaches the release critical point, pushing the snap fasteners to accelerate their reset along the slide groove, causing the snap fasteners to lock into the slot. The bottom of the hook part collides with the locking surface of the slot, generating a slight elastic deformation, forming an interference fit. During disassembly, an external force drives the fan units to move in the opposite direction, causing the snap fasteners to slide along the guide curved surface of the slot. The guide curved surface applies a squeezing force to the snap fasteners, causing them to compress the spring and retract along the slide groove. When the snap fasteners disengage from the slot, the spring releases its elastic reset force, pushing the snap fasteners back to their initial position.

[0012] In one embodiment, each fan unit has a first electrical connection terminal on one side of its two opposite side walls, and a second electrical connection terminal adapted to the first electrical connection terminal on the other side. The first electrical connection terminal is recessed in the side wall, and the second electrical connection terminal protrudes out of the side wall. When adjacent fan units are spliced ​​and fixed, the first electrical connection terminal is connected to the second electrical connection terminal of the adjacent fan unit, thereby realizing the circuit cascading of multiple fan units.

[0013] In one embodiment, a motor plate is provided inside the fan frame, which drives the fan to rotate. The first electrical connection terminal and the second electrical connection terminal are connected to the motor plate through wires. The first electrical connection terminal and the second electrical connection terminal are located in the side wall area where the fastener and the slot are located. When splicing, the first electrical connection terminal and the second electrical connection terminal of the adjacent fan unit are spliced ​​and fixed at the same time. The fan frame is provided with a positioning structure that matches the shape of the motor plate and the wires, which is used to fix the motor plate and the wires. The positioning structure fixes the motor plate and guides the wire arrangement. The wires are guided and accommodated by the notch on the side of the motor plate and the protrusion at the entry point of the first electrical connection terminal and the second electrical connection terminal, ensuring that the wires do not loosen.

[0014] In one embodiment, each fan unit integrates a power input interface and a power output interface; the power input interface is connected to a first electrical connection terminal, and the power output interface is connected to a second electrical connection terminal; when splicing, the current is connected through the power input interface of the first fan unit, and then transmitted to the subsequent fan units through the cascaded power output interfaces. Only one power supply line is needed to realize the circuit cascading of multiple fan units, reducing the number of power supply lines required and improving scalability.

[0015] In one embodiment, the snap fastener consists of a base end and a hook end. The base end is L-shaped and has a spring connecting protrusion. The spring connecting protrusion is interference-fitted with the spring end ring. The spring generates an initial preload under pre-compression. The guide structure is provided at the hook end.

[0016] The beneficial effects of this utility model are:

[0017] This utility model, by adopting the above-mentioned technical solution, integrates slidable snap fasteners and matching slots on both sides of the fan, realizing zero-tool assembly and disassembly between fans by "aligning and locking, pulling and separating"; together with the electrical connection terminals integrated on the same side, "mechanical-electrical dual linkage connection" is completed simultaneously at the moment of splicing, eliminating the need for independent wiring, building a modular infinite expansion architecture, and supporting the rapid networking and maintenance of any number of fans. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an exploded view of the present invention.

[0020] Figure 2 This is a diagram of the internal structure of this utility model.

[0021] Figure 3 This is a 3D diagram with adjustable buttons.

[0022] Figure 4 This is a schematic diagram of the assembly of this utility model. Figure 1 .

[0023] Figure 5 This is a schematic diagram of the assembly of this utility model. Figure 2 .

[0024] The numbers in the diagram represent: 1. Fan unit; 2. Fan blade; 3. Fan frame; 4. Fastener; 5. Slot; 6. Buckle; 7. Spring; 8. Guide structure; 9. Top cover; 10. Bottom cover; 11. Spring limiting structure; 12. First electrical connection terminal; 13. Second electrical connection terminal; 14. Base end; 15. Hook end; 16. Motor plate; 17. Positioning structure. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please refer to the embodiments of this utility model. Figures 1 to 5 :

[0029] A modular fan assembly structure based on sliding snap fasteners includes multiple fan units 1. Each fan unit 1 includes fan blades 2 and a fan frame 3. On opposite side walls of each fan unit 1, one side is provided with a fastener 4 containing a slidable snap fastener 6, and the other side is provided with a slot 5 adapted to the snap fastener 6. Two adjacent fan units 1 are spliced ​​and fixed by inserting the snap fastener 6 on one fan unit 1 into the slot 5 on the adjacent fan unit 1. The splicing and fixing is achieved by the two fan units 1 moving relative to each other in a parallel direction. The splicing and fixing is released by the two fan units 1 moving in opposite directions in a parallel direction, causing the snap fastener 6 to slide out of the slot 5.

[0030] By adopting the above technical solution, a modular fan splicing structure based on sliding buckles is provided, including multiple fan units 1. Each fan unit 1 has a buckle 4 on one side of its two side walls, including a slidable buckle 6, a spring 7, and a base. The buckle 6 consists of an L-shaped base and a hook with a guide structure 8. The base includes an integrally injection-molded plastic support wall, a groove, a sliding hole for the buckle 6, and a limiting wall. The L-shaped base is embedded in the groove, and the hook extends from the sliding hole of the buckle 6. The spring 7 connects the base and the support wall and drives the buckle 6 to reset. The other side is provided with an adapter slot 5, and the inner wall is a continuous guide curved surface. Adjacent fan units 1 are spliced ​​and fixed by inserting the buckle 6 into the corresponding slot 5, and locking is completed by parallel relative movement. The splicing is released by parallel reverse movement to disengage the buckle 6 from the slot 5. The fan unit 1 has a first electrical connection terminal 12 (grooved) and a second electrical connection terminal 13 (protruding) on ​​both sides. When splicing, the adjacent terminals are connected to realize cascaded power supply with a single power input. It enables quick assembly and disassembly of individual fan units by aligning and locking them, and then pulling them apart.

[0031] Preferably, the buckle 4 further includes a base and a spring 7. The base is a fixed structure of the fan frame 3. The snap fastener 6 is slidably disposed on the base. The spring 7 connects the base and the snap fastener 6, providing elastic restoring force for the snap fastener 6. The snap fastener 6 is provided with a guide structure 8. When disassembling, it slides along the guide structure 8 under the action of external force and compresses the spring 7 to disengage from the slot 5.

[0032] By adopting the above technical solution, the buckle 4 also includes a base and a spring 7. The base is a fixed structure integrally injection molded inside the fan frame 3. This fixed structure consists of a protruding plastic support wall inside the fan frame 3, a sliding hole and groove for the buckle 6 to slide between the upper cover 9 and the lower cover 10, and a plastic limiting wall to restrict the excessive displacement of the buckle 6. The L-shaped base of the buckle 6 is set on the groove inside the fan frame 3. The buckle 6 with the guide structure 8 extends out from the sliding hole of the buckle 6. The spring limiting structure 11 is a plastic support wall. One end of the spring 7 abuts against the spring limiting structure 11 and the other end is connected to the L-shaped base of the buckle 6, providing elastic restoring force for the buckle 6, so that the buckle 6 can slide on the fan frame 3 and be driven to return to its original position by the spring 7. When disassembling, under the action of external force, the edge of the slot 5 slides along the inclined surface of the guide structure 8 and compresses the spring 7 to disengage from the slot 5.

[0033] Preferably, the fan frame 3 includes an assemblable upper cover 9 and a lower cover 10; the inner sides of the upper cover 9 and the lower cover 10 are symmetrically provided with sliding grooves; the fastener 4 is slidably installed in the sliding groove; the lower cover 10 is provided with a spring limiting structure 11, which is used to apply a reverse force to the spring 7 to drive the fastener 4 to move in the engaging direction; the slot 5 is formed by the grooves of the upper cover 9 and the lower cover 10, and its inner wall is a continuous guide surface.

[0034] By adopting the above technical solution, the matching upper cover 9 and lower cover 10 are combined to form the fan frame 3. The inner sides of the upper cover 9 and lower cover 10 are symmetrically provided with sliding grooves. The two sliding grooves are distributed vertically and mirror-imagely with respect to the center of the fan. After the upper and lower covers 10 are combined, they form a sliding groove for the buckle 4 to slide, which restricts the degree of freedom of the buckle 4 except for the direction parallel to the splicing direction. Limiting blocks are provided at both ends of the sliding groove to ensure that the buckle 6 moves within a preset range. The spring limiting structure 11 of the lower cover 10 is used to apply a reverse force to the spring 7 to drive the buckle 4 to move in the locking direction. It is composed of an L-shaped plastic support wall integrally formed with the lower cover 10. The plastic support wall can also limit the buckle 6 to prevent the buckle 6 from moving back and forth. The joint of the slot 5 formed by the mirror groove splicing of the upper cover 9 and lower cover 10 is smoothly transitioned without height difference. Its inner wall is a continuous guide surface. The radius of curvature of the surface gradually increases from the entrance of the slot 5 to the locking position, forming a compression guide slope that is steep at first and then gentle.

[0035] Preferably, the height of the vertex of the guide surface is greater than the thickness of the snap fastener 6.

[0036] By adopting the above technical solution, the compression of spring 7 reaches its maximum value when the buckle passes the apex.

[0037] Preferably, during assembly, after the snap fastener 6 of the adjacent fan unit 1 contacts the guide curved surface, it is pressed and moves backward along the slide groove, compressing the spring 7. When the snap fastener 6 passes the apex of the curved surface, the spring 7 pushes the snap fastener 6 to reset and lock into the slot 5. During disassembly, the external force drives the fan unit 1 to move in the opposite direction, causing the snap fastener 6 to slide along the guide curved surface of the slot 5. The guide curved surface applies a squeezing force to the snap fastener 6, causing the snap fastener 6 to compress the spring 7 and move backward along the slide groove. When the snap fastener 6 disengages from the slot 5, the spring 7 releases the elastic reset force, pushing the snap fastener 6 back to its initial position.

[0038] By adopting the above technical solution, the buckle 4 with spring 7 and buckle 6, the guide structure 8 of buckle 6 hook part, and the guide slope of the slot 5 are used to achieve the functions of alignment and locking, and flat pull separation. When buckle 6 is locked into slot 5, the bottom of hook part collides with the locking surface of slot 5 and produces micro-elastic deformation, forming interference locking and improving connection stability.

[0039] Preferably, on each fan unit 1, a first electrical connection terminal 12 is provided on one side of the two opposite side walls, and a second electrical connection terminal 13 adapted to the first electrical connection terminal 12 is provided on the other side; when adjacent fan units 1 are spliced ​​and fixed, the first electrical connection terminal 12 and the second electrical connection terminal 13 of the adjacent fan unit 1 are connected, realizing the circuit cascading of multiple fan units 1.

[0040] By adopting the above technical solution, each fan unit 1 has a first electrical connection terminal 12 on one side of its two opposing side walls. This terminal has a groove-shaped structure with symmetrically distributed elastic contact pieces embedded inside. The ends of the contact pieces are arc-shaped protrusions, and the edges of the groove openings are provided with guide chamfers. The other side has a second electrical connection terminal 13, which is an outwardly protruding conductive block. The surface of the block is a gold-plated conductive plane, and the bottom has a wedge-shaped guide bevel. When adjacent fan units 1 are spliced ​​and fixed, the protruding block is inserted into the groove, and the arc-shaped protrusion is squeezed to produce micro-elastic deformation, forming a multi-point interference contact with the gold-plated plane. The root of the contact piece and the root of the block form a secondary current path, achieving redundant conduction. During the splicing process, the terminals slide relative to each other, generating a self-cleaning effect and scraping off the surface oxide layer. Multiple fan units 1 are connected in the above way to achieve non-polarity circuit cascading, and the disassembly of any unit does not affect the power supply of other units.

[0041] Preferably, the fan frame 3 has a motor plate 16 inside; the first electrical connection terminal 12 and the second electrical connection terminal 13 are connected to the motor plate 16 through wires, and the first electrical connection terminal 12 and the second electrical connection terminal 13 are located in the side wall area where the buckle 4 and the slot 5 are located; the fan frame 3 has a positioning structure 17 that matches the shape of the motor plate 16 and the wires, for fixing the motor plate 16 and the wires.

[0042] By adopting the above technical solution, the fan frame 3 has a motor plate 16 inside, which integrates a motor drive circuit; the first / second electrical connection terminal 13 is connected to the motor plate 16 through an anti-bending shielded wire; the terminal is positioned in the side wall area where the buckle 4 and the slot 5 are located, and its central axis is parallel to the movement trajectory of the snap fastener 6; during splicing, the terminal contact and mechanical locking are triggered synchronously to realize electromechanical linkage; the fan frame 3 has a partitioned positioning structure 17, the positioning area of ​​the motor plate 16 includes a U-shaped slot 5 and an elastic pressure claw on the frame base to realize tight embedding and vibration isolation of the motor plate 16; the wire guiding area includes a wire lead-out notch on the edge of the motor plate 16, and the inner wall of the notch is covered with a soft buffer layer; a branching rib is provided at the terminal entrance to separate and fix the wire; the terminal reinforcement area has a terminal back injection-molded support rib to suppress the transmission of insertion and extraction stress; the wire is arranged along a preset path, and after turning through the strain release ring, it is connected to the terminal without any suspended section; the positioning structure 17 ensures that the wire is resistant to vibration and loosening through the dual action of physical constraint and elastic clamping.

[0043] Preferably, each fan unit 1 integrates a power input interface and a power output interface; the power input interface is connected to the first electrical connection terminal 12, and the power output interface is connected to the second electrical connection terminal 13; when splicing, the current is connected through the power input interface of the first fan unit 1, and then transmitted to the subsequent fan units 1 through the cascaded power output interfaces.

[0044] By adopting the above technical solution, each fan unit 1 integrates a power input interface and a power output interface. The power input interface is directly connected to the first electrical connection terminal 12, and the power output interface is directly connected to the second electrical connection terminal 13. A current monitoring and dynamic voltage regulation module is set between the input / output interfaces to balance the cascaded voltage drop in real time. When splicing, the external power supply is connected to the input interface of the first unit, and the current is transmitted to the input interface of the next unit through the output interface. Hot-swapping and expansion at any position are supported. Faulty units are automatically bypassed to maintain continuous power supply to non-faulty units. Multiple fan units 1 achieve global power supply with a single cable through the above cascaded architecture, completely eliminating the problem of multi-line redundancy, and the scalability is only constrained by the power supply capacity.

[0045] Preferably, the snap fastener 6 consists of a base end 14 and a hook end 15. The base end 14 is L-shaped and has a spring 7 connecting protrusion. The guide structure 8 is provided at the hook end 15.

[0046] By adopting the above technical solution, the snap fastener 6 is composed of a base end 14 and a hook end 15. The base end 14 is L-shaped and has a spring 7 connecting protrusion. The spring 7 connecting protrusion is interference-fitted with the end ring of the spring 7. The spring 7 generates an initial pre-tightening force in the pre-compressed state. The guide structure 8 of the hook end 15 includes a main direction surface and a secondary locking surface. The main direction surface slides in contact with the curved surface of the slot 5 to guide the disassembly direction. The secondary locking surface forms a reverse engagement with the locking point of the slot 5 to resist vibration and loosening. The pre-tightening force of the spring 7 drives the snap fastener 6 to stay in the extended position to ensure that the hook is accurately inserted into the slot 5 during splicing. During disassembly, the guide structure 8 converts the radial extrusion force into axial displacement, which, together with the compression of the spring 7, achieves smooth disassembly.

[0047] Working principle: By integrating slidable snap fasteners 6 and adapter slots 5 on both sides of the fan, zero-tool assembly and disassembly of the fans can be achieved by "aligning and locking, and pulling to separate". With the electrical connection terminals integrated on the same side, the electrical connection is completed simultaneously at the moment of splicing, eliminating the need for independent wiring.

[0048] During installation, several fan units 1 can be assembled according to your needs, and the installation can be completed by connecting a power cord to the first electrical connection terminal 12 of the first fan unit 1.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A modular fan splicing structure based on a sliding snap fastener, comprising multiple fan units (1), wherein each fan unit (1) includes fan blades (2) and a fan frame (3), characterized in that: On each of the fan units (1), one side is provided with a fastener (4) containing a slidable snap fastener (6), and the other side is provided with a slot (5) adapted to the snap fastener (6). Among them, two adjacent fan units (1) are spliced ​​and fixed by inserting the snap fastener (6) on one of the fan units (1) into the slot (5) on the adjacent fan unit (1); The splicing and fixing is achieved by moving two fan units (1) relative to each other in a parallel direction; The splicing is released by moving the two fan units (1) in opposite directions in parallel, so that the snap fastener (6) slides out of the slot (5).

2. The modular fan splicing structure based on a sliding buckle according to claim 1, characterized in that: The buckle (4) also includes a base and a spring (7). The base is a fixed structure of the fan frame (3). The snap buckle (6) is slidably disposed on the base. The spring (7) connects the base and the snap buckle (6) and provides elastic restoring force for the snap buckle (6). The snap buckle (6) is provided with a guide structure (8). When disassembling, it slides along the guide structure (8) under the action of external force and compresses the spring (7) to disengage from the slot (5).

3. The modular fan splicing structure based on a sliding buckle according to claim 2, characterized in that: The fan frame (3) includes an assemblable upper cover (9) and a lower cover (10). The upper cover (9) and the lower cover (10) are symmetrically provided with sliding grooves on their inner sides; The fastener (4) is slidably installed in the slide groove; The lower cover (10) is provided with a spring limiting structure (11) for applying a reverse force to the spring (7) to drive the buckle (4) to move in the engaging direction; The slot (5) is formed by the grooves of the upper cover (9) and the lower cover (10), and its inner wall is a continuous guide surface.

4. A modular fan splicing structure based on a sliding snap fastener according to claim 3, characterized in that: The height of the vertex of the guide surface is greater than the thickness of the snap fastener (6).

5. A modular fan splicing structure based on a sliding snap fastener according to claim 3, characterized in that: During splicing, the snap fastener (6) of the adjacent fan unit (1) is pressed and moves backward along the slide groove after contacting the guide surface and compresses the spring (7). When the snap fastener (6) passes the top of the surface, the spring (7) pushes the snap fastener (6) to reset and lock into the slot (5). During disassembly, an external force drives the fan unit (1) to move in the opposite direction, causing the snap fastener (6) to slide along the guide surface of the slot (5). The guide surface applies a squeezing force to the snap fastener (6), causing the snap fastener (6) to compress the spring (7) and move backward along the slide. When the snap fastener (6) is disengaged from the slot (5), the spring (7) releases its elastic restoring force, pushing the snap fastener (6) back to its initial position.

6. A modular fan splicing structure based on a sliding snap fastener according to claim 1 or 2, characterized in that: On each of the two opposite sides of the fan unit (1), a first electrical connection terminal (12) is provided on one side and a second electrical connection terminal (13) adapted to the first electrical connection terminal (12) is provided on the other side. When adjacent fan units (1) are spliced ​​and fixed, the first electrical connection terminal (12) is connected to the second electrical connection terminal (13) of the adjacent fan unit (1), thereby realizing the circuit cascading of multiple fan units (1).

7. A modular fan splicing structure based on a sliding snap fastener according to claim 6, characterized in that: The fan frame (3) is equipped with a motor plate (16). The first electrical connection terminal (12) and the second electrical connection terminal (13) are connected to the motor board (16) through wires. The first electrical connection terminal (12) and the second electrical connection terminal (13) are located in the side wall area where the buckle (4) and the slot (5) are located. The fan frame (3) is provided with a positioning structure (17) that matches the shape of the motor plate (16) and the wire, for fixing the motor plate (16) and the wire.

8. A modular fan splicing structure based on a sliding snap fastener according to claim 6, characterized in that: Each fan unit (1) integrates a power input interface and a power output interface; The power input interface is connected to the first electrical connection terminal (12), and the power output interface is connected to the second electrical connection terminal (13). During assembly, the current is connected through the power input interface of the first fan unit (1) and then transmitted to the subsequent fan units (1) through the cascaded power output interfaces.

9. A modular fan splicing structure based on a sliding snap fastener according to claim 3, characterized in that: The snap fastener (6) consists of a base end (14) and a hook end (15). The base end (14) is L-shaped and has a spring (7) connecting protrusion. The guide structure (8) is set at the hook end (15).

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