A modular fan blade fastening assembly with redundant self-locking anti-dropping and a fan with the same

Abstract

This invention provides a modular fan blade quick-installation assembly and a fan blade opening mechanism with redundant self-locking anti-detachment features, comprising: a fan blade opening frame, an insert base, fan blades, a guide base, a side clamping assembly, and an alarm assembly. The fan blade opening frame includes a connecting base, and the insert base is installed below the connecting base to adapt to the installation of different fan blades. Compared with the prior art, this invention has the following advantages: By setting up a fan blade opening frame, insert base, fan blades, guide base, and side clamping assembly, the insert base is designed to adapt to the fan blades and is fixed to the fan blade opening frame. The fan blades are installed from the outer end to the insert base, and two independent redundant locking points are achieved through an eccentric clamping block. Furthermore, gap compensation structures and locking structures are also provided at both ends of the fan blades, thereby enabling quick assembly and disassembly of the fan blades. By setting up a fan blade opening frame, insert base, fan blades, and alarm assembly, the fan blades also have a terminal redundant anti-detachment structure, and an alarm is triggered simultaneously when this structure is activated.

Description

Technical Field

[0001] This invention belongs to the field of fan lamp technology, and specifically relates to a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and a blade-opening fan. Background Technology

[0002] A ceiling fan is a home appliance that combines a fan and a light fixture. It is both a lamp and a fan that hangs from the ceiling. Because it can serve two purposes and saves space, it is becoming a popular choice for many families when decorating and is widely used in modern society. In the structure of fan lights, some structures feature retractable blades, while others are fixed structures that cannot be retracted, i.e., open-blade fans. Existing technologies sometimes use bolts to fix the blades, which doesn't allow for convenient blade assembly and disassembly. Other technologies have quick-assembly structures, but these have several drawbacks: their locking mechanism is integrated with the blade holder, requiring separate molds for different appearances and blade holders, resulting in high costs and poor versatility; there is no safety redundancy, single-point locking, and failure of the clips and springs can easily cause the blades to detach, posing a centrifugal detachment safety hazard; the anti-detachment effect is poor, with conventional clips easily coming loose under force, especially under strong pulling or centrifugal force; assembly noise occurs due to the lack of elastic compensation structures, and assembly tolerances cause blade wobbling and noise; disassembly and assembly are inconvenient, as some structures cannot be hidden or disassembled after installation, resulting in poor appearance and difficult operation.

[0003] In summary, we hope to propose a new structure to solve the aforementioned technical problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and a blade-opening fan, thereby solving the problems mentioned in the background art.

[0005] The present invention is achieved through the following technical solution: a modular fan blade quick-installation assembly and a fan blade opening mechanism with redundant self-locking anti-detachment, comprising: a fan blade opening frame, an insert base, a fan blade, a guide base, a side clamping assembly and an alarm assembly, wherein the fan blade opening frame includes a connecting base, and the insert base is installed below the connecting base for adapting to the installation of different fan blades; The insert includes a fixed upper shell, a fixed lower shell, and a linkage gear. The fixed lower shell is located below the fixed upper shell, the linkage gear is located on the left and right sides between the fixed upper shell and the fixed lower shell, and the guide seat is located above the linkage gear. The side clamping assembly is located below the linkage gear, the fan blade is located between the fixed upper shell and the fixed lower shell, the fan blade includes a fan blade body, and the alarm assembly is located on the inner side below the fan blade body insertion section.

[0006] In a preferred embodiment, the fan frame further includes a top seat, a lower seat, a central seat, a fan cover, and an inlet slot; the connecting seats are provided in five sets and are distributed in a circumferentially equidistant structure. The fan cover is located on the outside of the connecting seat, the inlet slot is located on the outer side of the fan cover, the center seat is located above the connecting seat, the lower seat is located on the outside of the center seat, the top seat is located above the lower seat, the connecting seat is fixedly connected to the center seat and the fan cover by bolts, and the insert seat is fixedly connected to the connecting seat by bolts.

[0007] As a preferred embodiment, the insert seat further includes a flat guide seat, a linkage seat, a linkage guide seat and an eccentric clamping block. The flat guide seat is provided in two sets, and the two sets of flat guide seats are disposed between the fixed upper shell and the fixed lower shell. The linkage seat is located on the side away from the flat guide seat. Four sets of linkage guide seats are located on the front side of the linkage seat. Every two sets of linkage guide seats are arranged in a vertical structure. The linkage gear is located on the front side of the linkage seat and is arranged in a rotating structure. The eccentric clamping block is also located between the fixed upper shell and the fixed lower shell. The eccentric clamping block is offset relative to the radial direction of the fan blade, so that the fan blade drives the eccentric clamping block to rotate along the locking direction under the action of centrifugal force to enhance the clamping force. A rotating shaft passes through the rotation axis of the eccentric clamping block, and a clamping torsion spring is sleeved on the outside of the rotating shaft to automatically drive the eccentric clamping block to rotate and achieve clamping and limiting installation of the fan blade. An insertion groove is formed between the fixed upper shell and the fixed lower shell, and the front part of the fan blade body is fitted into the insertion groove. The fan blade body has clamping grooves on both the left and right outer sides. The eccentric clamping block has an abutment section on the side near the center of the insertion seat. The abutment section has a clamping section on the front side of the abutment section. The abutment section is set as a 45° inclined surface. The clamping section is set as a 30° + R14 arc. When the fan blade enters the initial section of the insertion slot, it first contacts the pressing and abutting section and finally makes the clamping section and the clamping slot fit together. At this time, the clamping torsion spring is in a natural state. During the installation process, the left and right sides of the fan blade body are guided by two sets of flat guide seats.

[0008] During installation, the fan blade is inserted into the insertion slot. In the initial stage, it is linearly guided into the slot by two sets of straight guide seats. Then, the head of the fan blade body contacts the eccentric clamping block. First, the contact section causes the eccentric clamping block to rotate around the axis, which in turn twists the clamping torsion spring. After the fan blade is fully installed, the clamping section is embedded into the clamping slot under the rotational force of the clamping torsion spring, thus locking the fan blade. Under the centrifugal force of the fan blade, the eccentric clamping block rotates in the locking direction, making the locking structure tighter and tighter, forming a reverse self-locking mechanism that prevents the fan blade from coming out. The two sets of eccentric clamping blocks are independently stressed, so the fan blade will not come out if one side fails.

[0009] In a preferred embodiment, the straight guide seat has a through groove formed vertically through one side near the fan blade, and the upper and lower sets of linkage guide seats have linkage guide grooves on opposite sides. The inner side of the linkage guide groove is movably fitted with several sets of linearly and equally distributed rolling balls to reduce the moving friction of the guide seat and the side clamping assembly. The guide seat includes a guide seat body, a connecting rod and a linkage tooth. The two ends of the connecting rod are respectively rotatably connected to the guide seat body and the eccentric clamping block. The first linkage tooth is located on the side of the guide body near the linkage gear. The first linkage tooth meshes with the linkage gear. The guide body is installed below the upper linkage guide and is movably engaged with the upper linkage guide groove. The side clamping assembly includes a side seat, a spring damping shock absorber, a side clamping seat, a connecting plate, and the second linkage tooth. The spring damping shock absorber is located on the inner side of one end near the fan blade, the side clamping seat is located at the other end of the spring damping shock absorber, the connecting plate is located on the side of the side seat away from the fan blade, and the second linkage gear is located on the side of the connecting plate near the linkage gear. The second linkage gear also meshes with the linkage gear. The side seat is movably fitted inside the through groove. The connecting plate and the lower linkage guide groove are movably fitted together and move linearly with the assistance of a rolling ball.

[0010] In a preferred embodiment, the side clamping seat is provided with a limiting tooth one on the side near the fan blade, and the fan blade body is provided with limiting teeth two on both the left and right sides, and the limiting tooth one and the limiting tooth two mesh with each other; The upper surface of the fan blade body is provided with four sets of positioning pressure grooves. Two sets of elastic contacts are provided near the axis of the fan cover between the fixed upper shell and the fixed lower shell to generate 1mm controllable deformation. The upper end of the fixed upper shell is provided with four sets of positioning pressure heads. The positioning head engages with the positioning groove after the fan blade is installed. The elastic contact is located at the head of the fan blade and contacts it. The first and second limiting teeth, the elastic contact, the positioning head, and the positioning groove work together to stabilize the fan blade installation position, thereby eliminating fan blade assembly gaps and abnormal operating noises.

[0011] After the fan blades are installed in place, the eccentric clamping block rotates and resets around the axis under the rotational force of the clamping torsion spring. It first pulls the guide seat to move linearly. The linear movement of the guide seat causes the first linkage tooth to rotate under the meshing of the linkage gear. Then, under the meshing of the second linkage tooth and the linkage gear, it drives the side clamping assembly to move linearly, so that the side clamping seat contacts the fan blade body. The first limiting tooth and the second limiting tooth mesh to form a limiting lock on both sides of the fan blade. The meshing structure can improve the stability of the fan blade after installation. In addition, after the fan blades are installed in place, the positioning pressure head is embedded in the positioning pressure groove, and the elastic contact compensates for the gap, so as to achieve the stability of the fan blade installation and eliminate the fan blade assembly gap and abnormal noise.

[0012] As a preferred embodiment, the open-blade fan frame also includes an alarm connector, a linkage head, a positive magnetic base, an anti-detachment plug, and a negative magnetic base, with the alarm connector located on the inner side of the fan cover; The linkage head is a movable fitting structure disposed inside the alarm coupling seat, the positive magnetic seat is disposed inside the lower end of the linkage head, the anti-disengagement plug is a movable fitting structure that penetrates through the inside of the connecting seat, and the negative magnetic seat is disposed above the anti-disengagement plug. An anti-detachment spring is sleeved on the outside of the anti-detachment plug. A pressing seat is fixedly connected to the end of the linkage head away from the fan cover axis. The pressing seat is provided with a protrusion at the end away from the fan cover axis and is a protruding structure in its natural state. A reset spring is sleeved on the outside of the pressing seat. A magnetic groove is provided on the lower surface of the alarm connector at the coaxial position of the anti-detachment plug. The positive magnetic seat is located above the magnetic groove and attracts the negative magnetic seat to move the anti-detachment plug upwards to overcome the elastic force of the anti-detachment spring. An anti-detachment slot is also provided on the upper surface of the fan blade body. The anti-detachment insert and the anti-detachment slot are movably fitted together, and the anti-detachment slot is located on the side near the axis of the fan cover and also has an alarm slot through it.

[0013] In a preferred embodiment, the alarm assembly includes an audible and visual alarm, an alarm squeezing head, an electrical column one, and an electrical column two, with the electrical column two positioned above the audible and visual alarm. The first electrical column is positioned above the second electrical column. Power-off springs are spaced apart on the outer sides of the first and second electrical columns. The alarm squeezing head is positioned above the first electrical column and is a movable fitting structure positioned inside the alarm slot. The alarm assembly also includes an alarm base and an outer column. The outer sleeve column is located above the alarm base, and the audible and visual alarm is located on the inner side of the lower end of the alarm base. Both the first and second electrical columns are conductive metal columns. The first and second electrical columns are spaced apart and contact the alarm circuit under the drive of the alarm squeezing head. The inner side of the outer sleeve column also houses a storage battery. The storage battery, the first electrical column, the second electrical column, and the audible and visual alarm constitute an alarm circuit. This circuit is used to activate the alarm circuit after the first electrical column and the second electrical column come into contact. After the fan blade is detached from the clamping and mounting structure, the anti-detachment insert will press against the alarm squeezing head to trigger the alarm circuit.

[0014] After the aforementioned locking structure of the fan blades fails, the fan blades move away from the axis under the action of centrifugal force. After the fan blades move slightly, the anti-detachment plug is locked by the anti-detachment slot. At this time, the anti-detachment plug will press the alarm squeezing head. The movement of the alarm squeezing head will drive the first electrical post to approach the second electrical post and make contact with each other, thereby completing the conduction and triggering of the alarm circuit, so that the sound and light alarm will alert the user. At this time, the fan blades are in a dangerous state.

[0015] The present invention also provides a fan blade assembly, including the aforementioned modular fan blade quick-assembly assembly with redundant self-locking anti-detachment.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are: By setting up an open-blade fan frame, insert base, fan blade, guide seat, and side clamping assembly, the insert base is adapted to fit the fan blade and is fixed to the open-blade fan frame. The fan blade is installed from the outer end to the insert base, and two independent redundant locking points are achieved through the eccentric clamping block. In addition, gap compensation structures and locking structures are also set at both ends of the fan blade. When it is necessary to disassemble the fan blade, the user only needs to squeeze the eccentric clamping block to release the locking state of the fan blade without tools, thereby realizing the quick disassembly and assembly of the fan blade.

[0017] By setting up a fan frame, insert base, fan blades and alarm components, the fan blades also have a redundant anti-detachment structure at the terminal. When the current clamping structure is released from locking the fan blades, the fan blades are displaced and the terminal is limited by the anti-detachment insert. At this time, the alarm circuit is triggered simultaneously to realize the operation of the audible and visual alarm, reminding the user that the fan blades are in a dangerous state. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the upper overall structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and an open-blade fan according to the present invention.

[0020] Figure 2This is a schematic diagram of the lower overall structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and an open-blade fan according to the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment, as well as the fan blade, guide seat, side clamping assembly, and alarm assembly in an open-blade fan according to the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and the fan blade frame in a fan blade opener according to the present invention.

[0023] Figure 5 This is a partial cross-sectional schematic diagram of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and the fan blade frame in a fan blade opener according to the present invention.

[0024] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0025] Figure 7 This is a schematic diagram of the outer end structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and an insert base in an open-blade fan according to the present invention.

[0026] Figure 8 for Figure 7 Enlarged view of section B in the middle.

[0027] Figure 9 This is a schematic diagram of the inner end structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and an insert base in an open-blade fan according to the present invention.

[0028] Figure 10 This is a schematic diagram of the lower structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and an insert seat in an open-blade fan after removing one side of the eccentric clamping block, according to the present invention.

[0029] Figure 11 This is a schematic diagram of the structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and an eccentric clamping block in an open-blade fan according to the present invention.

[0030] Figure 12 This is a partial schematic diagram of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and a fan blade in an open-blade fan after installation.

[0031] Figure 13 This is a schematic diagram of the upper structure of the fan blade in a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and the fan blade in an open-blade fan according to the present invention.

[0032] Figure 14 This is a schematic diagram of the lower side structure of the fan blade in a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and the present invention.

[0033] Figure 15 This is a schematic diagram of the structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and a guide seat in an open-blade fan according to the present invention.

[0034] Figure 16 This is a schematic diagram of the structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and a side clamping assembly for an open-blade fan according to the present invention.

[0035] Figure 17 This is a schematic diagram of the structure of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and an alarm assembly in an open-blade fan according to the present invention.

[0036] Figure 18 This is a partial cross-sectional schematic diagram of a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment and an alarm assembly in an open-blade fan according to the present invention.

[0037] In the diagram, 100-opening fan frame, 101-top seat, 102-lower seat, 103-center seat, 104-connecting seat, 105-fan cover, 106-inlet slot, 107-alarm linkage seat, 108-linkage head, 109-positive magnetic seat, 110-pressing seat, 111-reset spring, 112-protrusion head, 113-magnetic connecting slot, 114-anti-detachment insert, 115-anti-detachment spring, 116-negative magnetic seat; Insertion base, 201-fixed upper shell, 202-fixed lower shell, 203-insertion slot, 204-flat guide seat, 205-through slot, 206-linkage seat, 207-linkage guide seat, 208-linkage guide slot, 209-ball, 210-linkage gear, 211-eccentric clamping block, 212-abutting section, 213-clamping section, 214-positioning pressure head, 215-elastic contact, 216-clamping torsion spring, 217-rotating shaft; Fan blade, 301-fan blade body, 302-clamping groove, 303-limiting tooth two, 304-positioning pressure groove, 305-anti-detachment slot, 306-alarm slot; Guide seat, 401-guide seat body, 402-connecting rod, 403-linkage gear one; Side clamping assembly, 501-side seat, 502-spring damping shock absorber, 503-side clamping seat, 504-connecting plate, 505-linkage gear two; 600-Alarm assembly, 601-Alarm base, 602-Audible and visual alarm, 603-Outer sleeve column, 604-Alarm squeeze head, 605-Electrical column one, 606-Electrical column two, 607-Power-off spring. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1-17 The present invention provides a technical solution: a modular fan blade quick-installation assembly with redundant self-locking anti-detachment, comprising: a fan frame 100, an insert seat 200, a fan blade 300, a guide seat 400, a side clamping assembly 500, and an alarm assembly 600. The fan frame 100 includes a connecting seat 104, and the insert seat 200 is installed below the connecting seat 104 for adapting to the installation of different fan blades 300. The insert 200 includes a fixed upper shell 201, a fixed lower shell 202 and a linkage gear 210. The fixed lower shell 202 is located below the fixed upper shell 201, the linkage gear 210 is located on the left and right sides between the fixed upper shell 201 and the fixed lower shell 202, and the guide seat 400 is located above the linkage gear 210. The side clamping assembly 500 is located below the linkage gear 210, the fan blade 300 is located between the fixed upper shell 201 and the fixed lower shell 202, the fan blade 300 includes the fan blade body 301, and the alarm assembly 600 is located on the inner side below the insertion section of the fan blade body 301.

[0040] Please see Figures 1-15 Example 1: The fan frame 100 also includes a top seat 101, a lower seat 102, a center seat 103, a fan cover 105, and an inlet slot 106. The connecting seat 104 is provided in five sets and is distributed in a circumferentially even structure. The fan cover 105 is located on the outside of the connecting seat 104, the inlet groove 106 is opened on the outer side of the fan cover 105, the center seat 103 is located above the connecting seat 104, the lower seat 102 is located on the outside of the center seat 103, the top seat 101 is located above the lower seat 102, the connecting seat 104 is fixedly connected to the center seat 103 and the fan cover 105 by bolts, and the insert seat 200 is fixedly connected to the connecting seat 104 by bolts.

[0041] The insert 200 also includes a straight guide seat 204, a linkage seat 206, a linkage guide seat 207 and an eccentric clamping block 211. There are two sets of straight guide seats 204, which are located between the fixed upper shell 201 and the fixed lower shell 202. The linkage seat 206 is located on the side away from the flat guide seat 204. Four sets of linkage guide seats 207 are located on the front side of the linkage seat 206. Each pair of linkage guide seats 207 are arranged in a vertical structure. The linkage gear 210 is located on the front side of the linkage seat 206 and is arranged in a rotating structure. The eccentric clamping block 211 is also located between the fixed upper shell 201 and the fixed lower shell 202. The eccentric clamping block 211 is offset relative to the radial direction of the fan blade, so that the fan blade 300 drives the eccentric clamping block 211 to rotate in the locking direction under the action of centrifugal force to enhance the clamping force. A rotating shaft 217 passes through the rotation axis of the eccentric clamping block 211. A clamping torsion spring 216 is sleeved on the outside of the rotating shaft 217 to automatically drive the eccentric clamping block 211 to rotate and achieve clamping and limiting installation of the fan blade 300. An insertion groove 203 is formed between the fixed upper shell 201 and the fixed lower shell 202. The front part of the fan blade body 301 is inserted into the insertion groove 203. The fan blade body 301 has clamping grooves 302 on both the left and right outer sides. The eccentric clamping block 211 has an abutment section 212 on the side near the center of the insertion seat 200. The clamping section 213 is provided in front of the abutment section 212. The abutment section 212 is set as a 45° inclined surface, and the clamping section 213 is set as a 30°+R14 arc. When the fan blade 300 enters the initial section of the insertion slot 203, it first contacts the abutting section 212 and finally makes the clamping section 213 fit into the clamping slot 302. At this time, the clamping torsion spring 216 is in a natural state. During the installation process, the left and right sides of the fan blade body 301 are guided by the left and right sets of straight guide seats 204.

[0042] During installation, the fan blade 300 is inserted into the insertion slot 203. In the initial segment, it is linearly guided into the slot via two sets of straight guide seats 204. Then, the head of the fan blade body 301 contacts the eccentric clamping block 211. First, it contacts the abutment segment 212, causing the eccentric clamping block 211 to rotate around the axis and torsion the clamping torsion spring 216. After the fan blade 300 is installed in place, the clamping segment 213 is embedded into the clamping slot 302 under the rotational force of the clamping torsion spring 216, thereby locking the fan blade 300. Under the centrifugal force of the fan blade 300, the direction of the force causes the eccentric clamping block 211 to rotate in the locking direction, which makes the locking structure tighter and tighter, forming a reverse self-locking mechanism that prevents the fan blade 300 from coming out. The two sets of eccentric clamping blocks 211 are independently stressed, and the fan blade 300 will not come out if one side fails.

[0043] The rotation center of the eccentric clamping block 211 is offset relative to the radial direction of the fan blade 300, so that when the fan blade 300 is subjected to centrifugal force during operation, the direction of the centrifugal force forms a torque relative to the rotation center of the eccentric clamping block 211. This torque drives the eccentric clamping block 211 to continue rotating in the locking direction, so that the clamping force of the clamping section 213 on the clamping groove 302 increases synchronously with the increase of centrifugal force. This results in the clamping structure forming a self-reinforcing locking mechanism of "centrifugal force-torque conversion-clamping force enhancement". That is, when the fan blade speed increases to 300, the centrifugal force it experiences increases, which is then converted into a larger clamping force through the eccentric structure. This makes the locking structure exhibit a reverse self-locking characteristic that becomes tighter the more force it is subjected to. This characteristic is different from the traditional structure that relies on elastic elements to provide a constant clamping force. Furthermore, the two sets of eccentric clamping blocks 211 are respectively set on both sides of the fan blade 300 and are subjected to force independently. If the clamping structure on either side fails, the other side can still generate a self-reinforcing clamping force under the action of centrifugal force, thereby forming a redundant locking structure, which significantly improves the anti-detachment safety of the fan blade 300 under abnormal working conditions.

[0044] A through groove 205 is formed vertically through one side of the straight guide seat 204 near the fan blade 300, and a linkage guide groove 208 is opened on the opposite side of the upper and lower sets of linkage guide seats 207. The inner side of the linkage guide groove 208 is movably fitted with several sets of linearly and equally distributed rolling balls 209, which are used to reduce the moving friction of the guide seat and side clamping assembly 500. The guide seat 400 includes a guide seat body 401, a connecting rod 402 and a linkage tooth 403. The two ends of the connecting rod 402 are rotatably connected to the guide seat body 401 and the eccentric clamping block 211, respectively. Linkage tooth 403 is located on the side of guide body 401 near linkage gear 210. Linkage tooth 403 meshes with linkage gear 210. Guide body 401 is installed below upper linkage guide 207 and is movably engaged with upper linkage guide groove 208. Side clamping assembly 500 includes side seat 501, spring damping shock absorber 502, side clamping seat 503, connecting plate 504 and linkage tooth 505. The spring damping shock absorber 502 is located on the inner side of one end near the fan blade 300, the side clamping seat 503 is located on the other end of the spring damping shock absorber 502, the connecting plate 504 is located on the side of the side seat 501 away from the fan blade 300, and the linkage gear 210 is located on the side of the connecting plate 504 near the linkage gear 210. The second linkage gear 505 and the linkage gear 210 also mesh with each other. The side seat 501 is located inside the through groove 205 and is movably fitted. The connecting plate 504 and the lower linkage guide groove 208 are movably fitted with each other and move linearly with the assistance of the ball 209.

[0045] The side clamping seat 503 is provided with a limiting tooth 1 on the side near the fan blade 300, and the fan blade body 301 is provided with limiting teeth 2 303 on both the left and right sides. The limiting tooth 1 and the limiting tooth 2 303 mesh with each other. Four sets of positioning grooves 304 are provided on the upper surface of the fan blade body 301. Two sets of elastic contacts 215 are provided near the axis of the fan cover 105 between the fixed upper shell 201 and the fixed lower shell 202 to generate 1mm controllable deformation (the elastic contact 215 is only fixed at one end and suspended at the other end, thereby realizing elastic deformation movement). Four sets of positioning pressure heads 214 are provided at the upper end of the fixed upper shell 201. After the fan blade 300 is installed, the positioning head 214 is engaged with the positioning groove 304. The elastic contact 215 is located at the head of the fan blade 300 and is in contact with it. The first limiting tooth and the second limiting tooth 303, the elastic contact 215, the positioning head 214 and the positioning groove 304 work together to stabilize the installation position of the fan blade 300, thereby eliminating the assembly gap and abnormal noise of the fan blade 300.

[0046] After the fan blade 300 is installed in place, the eccentric clamping block 211 rotates and resets around its axis under the rotational force of the clamping torsion spring 216. The rotation of the eccentric clamping block 211 drives the guide seat 400 to undergo linear displacement through the connecting rod 402. The guide seat 400 meshes with the connecting gear 210 through the first connecting tooth 403, thereby converting the rotational motion into gear transmission motion. Furthermore, the second connecting tooth 505 drives the side clamping assembly 500 to generate a reverse displacement, so that the side clamping seat 503 synchronously clamps the side of the fan blade 300. This forms an "eccentric rotation - connecting rod transmission - gear" mechanism. The multi-level linkage locking path of "linkage-lateral clamping" enables a single installation action to trigger the synchronous operation of the multi-level locking structure. This multi-level linkage structure is not a simple superposition, but achieves coordinated locking through motion coupling, thereby significantly improving the stability and vibration resistance of the overall structure. In addition, this meshing structure can improve the stability of the fan blade 300 after installation. Furthermore, after the fan blade 300 is installed in place, the positioning pressure head 214 is embedded into the positioning pressure groove 304, and the elastic contact 215 compensates for the gap, thereby achieving the stability of the fan blade 300 installation and eliminating the assembly gap and abnormal noise of the fan blade 300.

[0047] Specifically, the fan holder 100 is installed below the ceiling. When installing the fan blade 300, the user only needs to insert the fan blade 300 into the slot 106 from the outside first, and then insert the fan blade 300 into the insertion slot 203. In the initial stage of the insertion and installation process, the head of the fan blade body 301 is linearly guided by the straight guide seats 204 located on both sides. During this process, the limiting teeth are set in the opposite direction of this installation direction, so that the side clamping seat 503 continuously compresses the spring damping shock absorber 502 during the installation of the fan blade 300. Thus, this tooth meshing structure will not block the normal insertion of the fan blade 300 during the installation process. During the continued insertion and installation of the fan blade 300, the fan blade body 301 contacts the eccentric clamping block 211, and first contacts the abutment section 212 of the eccentric clamping block 211. The abutment section 212 is set with a 45° inclined surface, which allows the fan blade 300 to be installed smoothly. During the continued insertion and installation, the eccentric clamping block 211 is pushed, causing the eccentric clamping block 211 to rotate around the axis of the rotation shaft 217, and at the same time, the clamping torsion spring 216 to store energy. Then, after passing the abutment section 212, that is, after the fan blade 300 is inserted into the air, the fan blade 300 is installed into the air. After the fan blade 300 is finally installed, the eccentric clamping block 211 is rotated and reset under the rotational force of the clamping torsion spring 216, so that the clamping section 213 is embedded in the clamping groove 302, thus locking the fan blade 300. Under the centrifugal force of the fan blade 300, the direction of the force causes the eccentric clamping block 211 to rotate in the locking direction, which makes the locking structure tighter and tighter, forming a reverse self-locking, so that the fan blade 300 cannot be dislodged. Moreover, the two sets of eccentric clamping blocks 211 are subjected to force independently, and the fan blade 300 will not be dislodged if one side fails. Under normal operating conditions, when the fan blade 300 rotates at 100 to 300 rpm, its centrifugal force can be increased to 3 to 6 times that of the static state. This corresponds to a synchronous increase in the locking torque generated by the eccentric clamping block 211, thereby increasing the contact pressure of the clamping section 213 on the clamping groove 302 by more than 30%. Compared with the traditional constant clamping force structure, the present invention has a higher resistance to detachment under high speed conditions, which can effectively prevent the fan blade 300 from loosening or detaching under centrifugal load. The eccentric clamping block 211 has two sets of independent structures, which are located on both sides of the fan blade 300 for locking installation. When the fan blade 300 is installed in place, the spring damping shock absorber 502 will reset and the limiting tooth 1 and the limiting tooth 2 303 will mesh to form a further limiting lock on both sides of the fan blade 300 (the limiting tooth 1 is set in the opposite direction along the installation direction, so that the fan blade 300 cannot be disengaged after being engaged and locked). This gives the fan blade 300 multiple redundant locking structures. This meshing locking structure can also maintain the stable installation of the fan blade 300. After the fan blade 300 is installed in place, the elastic contact 215 located near the axis will compensate for the gap. The positioning pressure head 214 is embedded in the positioning pressure groove 304 above the fan blade 300 to hold it. The three sets of structures work together to maintain the installation position of the fan blade 300, eliminate the assembly gap caused by the tolerance of the fan blade 300, prevent abnormal noise caused by the gap, and the whole installation process does not require additional tools. When the fan blade 300 needs to be disassembled, the user only needs to pinch the two sets of eccentric clamping blocks 211 in the same location. The rotation of the eccentric clamping blocks 211 will push the guide seat 400 to move linearly toward the fan blade 300 through the connecting rod 402. The guide seat 400 is linearly guided by the linkage guide groove 208, and the sliding friction is changed to rolling friction by the ball 209 to reduce the moving friction. The linear movement of the guide seat 400 causes the linkage tooth 1 403 to mesh with the linkage gear 210 to rotate. The linkage gear 210 also meshes with the linkage tooth 2 505, thereby driving the side clamping assembly 500 and the guide seat 400 to move in opposite directions. This will cause the limiting tooth 1 and the limiting tooth 2 303 to disengage. During the pinching process, the clamping section 213 will disengage from the clamping groove 302, which can release the locking of the fan blade 300 installation, thereby realizing the tool-less disassembly of the fan blade 300. In addition, the connecting seat 104 is fixed by a bolt structure, while the insert seat 200 is designed to fit the fan blade 300. The insert seat 200 is also fixed to the bottom of the connecting seat 104 by a bolt structure. The independent module design only needs to match the standard hole position to fit all open-blade fan frames 100 and is compatible with different types of fan blades 300, thereby reducing repeated mold opening. In terms of the overall structure, the protruding parts are all located above the fan blade 300, and the appearance is neat when viewed from the ground.

[0048] Please see Figures 1-7 , Figures 11-13 and Figures 16-17 Example 2: The open-blade fan frame 100 also includes an alarm coupling 107, a linkage head 108, a positive magnetic base 109, an anti-detachment plug 114, and a negative magnetic base 116. The alarm coupling 107 is located on the inner side of the fan cover 105. The linkage head 108 is a movable fitting structure located inside the alarm coupling seat 107. The positive magnetic seat 109 is located inside the lower end of the linkage head 108. The anti-detachment plug 114 is a movable fitting structure that is installed through the inside of the connecting seat 104. The negative magnetic seat 116 is located above the anti-detachment plug 114. An anti-detachment spring 115 is sleeved on the outside of the anti-detachment insert 114. A pressing seat 110 is fixedly connected to one end of the linkage head 108 away from the axis of the fan cover 105. A protrusion 112 is provided at one end of the pressing seat 110 away from the axis of the fan cover 105 and is a protruding structure in the natural state. A reset spring 111 is sleeved on the outside of the pressing seat 110. A magnetic groove 113 is provided on the lower surface of the alarm connector 107 at the coaxial position of the anti-detachment plug 114. The positive magnetic seat 109 is located above the magnetic groove 113 and attracts the negative magnetic seat 116 to overcome the elastic force of the anti-detachment spring 115 and move upward. An anti-detachment slot 305 is also provided on the upper surface of the fan blade body 301. The anti-detachment insert 114 and the anti-detachment slot 305 are movably engaged with each other. The anti-detachment slot 305 is located on the side near the axis of the fan cover 105 and also has an alarm slot 306 extending through it.

[0049] The alarm assembly 600 includes an audible and visual alarm 602, an alarm squeezing head 604, an electrical post 1 605, and an electrical post 2 606, with the electrical post 2 606 positioned above the audible and visual alarm 602. Electrical column 1 605 is positioned above electrical column 2 606. Power-off springs 607 are sleeved on the outer sides of electrical column 1 605 and electrical column 2 606 at intervals. Alarm squeezing head 604 is positioned above electrical column 1 605 and is configured to be movable and fitted inside alarm slot 306. Alarm assembly 600 also includes alarm base 601 and outer sleeve column 603. The outer sleeve post 603 is located above the alarm base 601, and the audible and visual alarm 602 is located on the inner side of the lower end of the alarm base 601. Both the first electrical post 605 and the second electrical post 606 are conductive metal posts. The first electrical post 605 and the second electrical post 606 are spaced apart and contact the alarm circuit under the drive of the alarm squeezing head 604. The inner side of the outer sleeve column 603 also houses a storage battery. The storage battery, the first electrical column 605, the second electrical column 606, and the audible and visual alarm 602 constitute an alarm circuit. This circuit is used to activate the alarm circuit after the first electrical column 605 and the second electrical column 606 come into contact. After the fan blade 300 is released from the clamping and mounting structure, the anti-detachment insert 114 presses against the alarm squeezing head 604 to trigger the alarm circuit.

[0050] The specific triggering process of the alarm component 600 is as follows: when the fan blade 300 tends to detach, under the action of centrifugal force, the fan blade body 301 is driven to move away from the axis, causing the anti-detachment plug 114 to move relative to the anti-detachment slot 305 and form a block at its end, thereby causing the anti-detachment plug 114 to generate radial displacement. The radial displacement of the anti-detachment plug 114 further applies axial compressive force to the alarm extrusion head 604, causing the alarm extrusion head 604 to move axially. During its movement, the alarm squeezing head 604 pushes the first electrical column 605 closer to the second electrical column 606, causing the first electrical column 605 and the second electrical column 606, which were originally in a spaced-out state, to come into contact, thereby forming an electrical connection and activating the alarm circuit. The first electrical column 605 and the second electrical column 606 are connected in series between the battery and the audible and visual alarm 602, forming a normally open trigger circuit structure. When the first electrical column 605 and the second electrical column 606 come into contact, the circuit is closed and the audible and visual alarm 602 is triggered to work. Furthermore, the trigger stroke of the alarm squeezing head 604 is 1-2 mm, the axial force required for triggering is 3-8 N, the gap between the first electrical post 605 and the second electrical post 606 in the natural state is 0.5-1 mm, and they are kept separated by the power-off spring 607. When the external force disappears, the first electrical post 605 and the second electrical post (606) are separated again under the reset action of the power-off spring 607, so that the circuit is restored to the open state. Through the above structure, the alarm component 600 forms a deterministic triggering path of "mechanical displacement - electrical contact - alarm triggering", avoiding false triggering, and ensuring timely response when the fan blade 300 undergoes abnormal displacement.

[0051] After the aforementioned locking structure of the fan blade 300 fails, the fan blade 300 moves away from the axis under the action of centrifugal force. After the fan blade 300 moves slightly, the anti-detachment plug 114 is engaged and blocked by the anti-detachment slot 305. At this time, the anti-detachment plug 114 will press the alarm squeezing head 604. The movement of the alarm squeezing head 604 will drive the first electrical plug 605 to approach the second electrical plug 606 and make contact with each other, thereby completing the conduction and triggering of the alarm circuit, so that the sound and light alarm 602 will alarm and remind the user. At this time, the fan blade 300 is in a dangerous state.

[0052] The present invention also provides a fan blade assembly, including the aforementioned modular fan blade quick-assembly assembly with redundant self-locking anti-detachment.

[0053] Spring Parameter Summary Table

[0054] Summary table of parameters for spring damper shock absorbers

[0055] Based on the first embodiment described above, further, in Embodiment 1, four sets of locking structures are described, which together constitute a firm locking setting for the fan blade 300, so that the fan blade 300 cannot be disengaged during use. With the setting of the eccentric clamping block 211, it is locked tighter and tighter under strong pull and centrifugal force, forming a native anti-disengagement. In extreme cases, the fan blade 300 may be locked and disengaged, which will cause the fan blade 300 to move away from the axis under the action of centrifugal force. Under the slight movement, the anti-disengagement plug 114 moves and engages inside the anti-disengagement slot 305, and the anti-disengagement plug 114 is blocked at the end of the anti-disengagement slot 305, so that the fan blade 300 can only be slightly deflected. This locking structure is a bottom-mounted structure at the end. When this locking structure is triggered, the movement of the anti-detachment plug 114 will squeeze and push the alarm squeezing head 604. The movement of the alarm squeezing head 604 will cause the electrical plug 605 to approach the electrical plug 606 and make contact with each other, thereby completing the conduction trigger of the alarm circuit. The audible and visual alarm 602 will alert the user (the audible and visual alarm 602 is a high-precision alarm, and its specific model can be any existing mature equipment on the market, as long as it meets the requirements of this invention. Its related connection circuits and control methods all use existing technology, which will not be elaborated here. The battery settings match the requirements of the audible and visual alarm 602 and also use existing mature technology). At this time, the fan blade 300 is in a dangerous state, and the user needs to interrupt the operation and inspect the installation of the fan blade 300 to further ensure the safety of the fan blade 300. Under normal circumstances, releasing the bottom locking structure of the fan blade 300 does not hinder its normal removal and requires no additional manual control. It only requires simultaneously engaging the eccentric clamping block 211, which pushes the protrusion 112, thereby moving the pressing seat 110 and simultaneously positioning the linkage head 108 above the magnetic groove 113. This places the positive magnetic seat 109 on the same axis as the magnetic groove 113, at which point the positive magnetic seat 109 and the negative magnetic seat 116 are aligned. The mutual attraction causes the anti-detachment plug 114 to overcome the spring force of the anti-detachment spring 115, thereby causing the anti-detachment plug 114 to disengage from the anti-detachment slot 305, thus releasing the bottom lock of the fan blade 300. After the fan blade is installed in place, the return of the anti-detachment spring 115 will cause the anti-detachment plug 114 to be inserted into the anti-detachment slot 305, and the linkage head 108 will move away from the magnetic connecting groove 113 under the rebound force of the return spring 111, so that the positive magnetic base 109 and the negative magnetic base 116 can no longer attract each other.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular fan blade quick-assembly assembly with redundant self-locking anti-detachment features, comprising: The fan frame (100), insert base (200), fan blade (300), guide base (400), side clamping assembly (500) and alarm assembly (600) are characterized in that the fan frame (100) includes a connecting base (104), and the insert base (200) is installed below the connecting base (104) for adapting to the installation of different fan blades (300); The insert (200) includes a fixed upper shell (201), a fixed lower shell (202), and a linkage gear (210). The fixed lower shell (202) is located below the fixed upper shell (201), and the linkage gear (210) is located on the left and right sides between the fixed upper shell (201) and the fixed lower shell (202). The guide seat (400) is located above the linkage gear (210). The side clamping assembly (500) is located below the linkage gear (210), the fan blade (300) is located between the fixed upper shell (201) and the fixed lower shell (202), the fan blade (300) includes a fan blade body (301), and the alarm assembly (600) is located on the inner side below the insertion section of the fan blade body (301).

2. The modular fan blade quick-assembly assembly with redundant self-locking anti-detachment as described in claim 1, characterized in that: The open-leaf fan frame (100) also includes a top seat (101), a lower seat (102), a center seat (103), a fan cover (105), and an inlet slot (106). The connecting seat (104) is provided in five sets and is distributed in a circumferentially divided structure. The fan cover (105) is located on the outside of the connecting seat (104), the inlet groove (106) is opened on the outer side of the fan cover (105), the center seat (103) is located above the connecting seat (104), the lower seat (102) is located on the outside of the center seat (103), the top seat (101) is located above the lower seat (102), the connecting seat (104) is fixedly connected to the center seat (103) and the fan cover (105) by bolts, and the insert seat (200) is fixedly connected to the connecting seat (104) by bolts.

3. The modular fan blade quick-assembly assembly with redundant self-locking anti-detachment as described in claim 1, characterized in that: The insert (200) also includes a straight guide seat (204), a linkage seat (206), a linkage guide seat (207), and an eccentric clamping block (211). The straight guide seat (204) is provided in two sets, and the two sets of the straight guide seats (204) are located between the fixed upper shell (201) and the fixed lower shell (202). The linkage seat (206) is located on the side away from the flat guide seat (204), and four sets of linkage guide seats (207) are located on the front side of the linkage seat (206). Each pair of linkage guide seats (207) are arranged in a vertical structure. The linkage gear (210) is located on the front side of the linkage seat (206) and is arranged in a rotating structure. The eccentric clamping block (211) is also arranged between the fixed upper shell (201) and the fixed lower shell (202). The eccentric clamping block (211) is offset relative to the radial direction of the fan blade, so that the fan blade (300) drives the eccentric clamping block (211) to rotate in the locking direction under the action of centrifugal force to enhance the clamping force; The eccentric clamping block (211) has a rotating shaft (217) passing through its rotation axis. A clamping torsion spring (216) is sleeved on the outside of the rotating shaft (217) to automatically drive the eccentric clamping block (211) to rotate and achieve clamping and limiting installation of the fan blade (300). An insertion groove (203) is formed between the fixed upper shell (201) and the fixed lower shell (202). The front section of the fan blade body (301) is inserted into the insertion groove (203). The fan blade body (301) has clamping grooves (302) on both the left and right outer sides. The eccentric clamping block (211) has an abutment section (212) on the side near the center of the insertion seat (200). The abutment section (212) has a clamping section (213) on the front side. The abutment section (212) is a 45° inclined surface. The clamping section (213) is a 30°+R14 arc. When the fan blade (300) enters the initial section of the insertion slot (203), it first contacts the pressing section (212) and finally makes the clamping section (213) fit into the clamping slot (302). At this time, the clamping torsion spring (216) is in a natural state. During the installation process, the left and right sides of the fan blade body (301) are guided by the two sets of straight guide seats (204).

4. A modular fan blade quick-assembly assembly with redundant self-locking anti-detachment as described in claim 3, characterized in that: The straight guide seat (204) forms a through groove (205) through one side of the fan blade (300) with vertical penetration. The upper and lower sets of linkage guide seats (207) are provided with linkage guide grooves (208) on opposite sides. The inner side of the linkage guide groove (208) is movably fitted with several sets of linearly equally distributed rolling balls (209) to reduce the moving friction of the guide seat (400) and the side clamping assembly (500). The guide seat (400) includes a guide seat body (401), a connecting rod (402) and a linkage tooth (403). The two ends of the connecting rod (402) are rotatably connected to the guide seat body (401) and the eccentric clamping block (211) respectively. The first linkage tooth (403) is disposed on the side of the guide body (401) near the linkage gear (210). The first linkage tooth (403) meshes with the linkage gear (210). The guide body (401) is installed below the upper linkage guide (207) and is movably engaged with the upper linkage guide groove (208). The side clamping assembly (500) includes a side seat (501), a spring damping shock absorber (502), a side clamping seat (503), a connecting plate (504), and a second linkage tooth (505). The spring damping shock absorber (502) is located on the inner side of one end near the fan blade (300), the side clamping seat (503) is located on the other end of the spring damping shock absorber (502), the connecting plate (504) is located on the side of the side seat (501) away from the fan blade (300), and the second linkage gear (505) is located on the side of the connecting plate (504) near the linkage gear (210). The second linkage gear (505) also meshes with the linkage gear (210). The side seat (501) is located inside the through groove (205) and is movably fitted. The connecting plate (504) and the lower linkage guide groove (208) are movably fitted together and move linearly with the assistance of the ball (209).

5. A modular fan blade quick-assembly assembly with redundant self-locking anti-detachment as described in claim 4, characterized in that: The side clamping seat (503) is provided with a limiting tooth one on the side near the fan blade (300), and the fan blade body (301) is provided with limiting teeth two (303) on both the left and right sides. The limiting tooth one and the limiting tooth two (303) mesh with each other. The upper surface of the fan blade body (301) is provided with four sets of positioning pressure grooves (304). Two sets of elastic contacts (215) are provided between the fixed upper shell (201) and the fixed lower shell (202) near the axis of the fan cover (105) to generate 1mm controllable deformation. The upper end of the fixed upper shell (201) is provided with four sets of positioning pressure heads (214). After the fan blade (300) is installed, the positioning head (214) is engaged with the positioning groove (304). The elastic contact (215) is located at the head of the fan blade (300) and is in contact with it. The first limiting tooth and the second limiting tooth (303), the elastic contact (215), the positioning head (214) and the positioning groove (304) work together to stabilize the installation position of the fan blade (300) and eliminate the assembly gap and abnormal noise of the fan blade (300).

6. A modular fan blade quick-assembly assembly with redundant self-locking anti-detachment as described in claim 1, characterized in that: The open-leaf fan frame (100) also includes an alarm connector (107), a linkage head (108), a positive magnetic base (109), an anti-detachment plug (114), and a negative magnetic base (116). The alarm connector (107) is located on the inner side of the fan cover (105). The linkage head (108) is a movable fitting structure disposed inside the alarm coupling seat (107), the positive magnetic seat (109) is disposed inside the lower end of the linkage head (108), the anti-detachment plug (114) is a movable fitting structure that penetrates inside the connecting seat (104), and the negative magnetic seat (116) is disposed above the anti-detachment plug (114); An anti-detachment spring (115) is sleeved on the outside of the anti-detachment plug (114). A pressing seat (110) is fixedly connected to one end of the linkage head (108) away from the axis of the fan cover (105). A protrusion (112) is provided at one end of the pressing seat (110) away from the axis of the fan cover (105), and it is a protruding structure in the natural state. A reset spring (111) is sleeved on the outside of the pressing seat (110). The alarm connector (107) has a magnetic groove (113) on its lower surface coaxial with the anti-detachment plug (114). The positive magnetic seat (109) is located above the magnetic groove (113) and attracts the negative magnetic seat (116) to help the anti-detachment plug (114) overcome the elastic force of the anti-detachment spring (115) and move upward. The upper surface of the fan blade body (301) also has an anti-detachment slot (305). The anti-detachment plug (114) and the anti-detachment slot (305) are movably engaged with each other. The anti-detachment slot (305) is located on the side near the axis of the fan cover (105) and also has an alarm slot (306) extending through it.

7. A modular fan blade quick-assembly assembly with redundant self-locking anti-detachment as described in claim 6, characterized in that: The alarm assembly (600) includes an audible and visual alarm (602), an alarm squeezing head (604), an electrical column one (605), and an electrical column two (606), with the electrical column two (606) positioned above the audible and visual alarm (602). The first electrical column (605) is positioned above the second electrical column (606). The outer sides of the first electrical column (605) and the second electrical column (606) are fitted with power-off springs (607) at intervals. The alarm squeezing head (604) is positioned above the first electrical column (605) and is a movable fitting structure positioned inside the alarm slot (306). The alarm assembly (600) also includes an alarm base (601) and an outer column (603). The outer sleeve post (603) is located above the alarm base (601), and the audible and visual alarm (602) is located on the inner side of the lower end of the alarm base (601). The first electrical post (605) and the second electrical post (606) are both conductive metal posts. The first electrical post (605) and the second electrical post (606) are spaced apart and contact the alarm circuit under the drive of the alarm squeezing head (604). The inner side of the outer sleeve column (603) also has a built-in battery. The battery, the first electrical column (605), the second electrical column (606) and the sound and light alarm (602) constitute an alarm circuit. The alarm circuit is activated after the first electrical column (605) and the second electrical column (606) come into contact. After the fan blade (300) is released from the clamping and mounting structure, the anti-detachment plug (114) presses the alarm squeezing head (604) to trigger the alarm circuit.

8. A fan with open blades, characterized in that, Includes a modular fan blade quick-assembly assembly with redundant self-locking anti-detachment as described in any one of claims 1-7.

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