CN215170925U - Heat radiation fan - Google Patents

Abstract

The utility model belongs to the technical field of the fan, especially, relate to a radiator fan, set up the chamber that holds that runs through its center department both ends in the framework, the installation base is located the central point of holding the chamber bottom and puts, the one end of each connecting rod all is connected with the lateral wall fixed connection of installation base, the other end of each connecting rod all is connected with the inner wall fixed connection that holds the chamber, two wire clamps all are connected with the lateral wall fixed connection of one of them connecting rod, and be formed with the wire storage groove between the lateral wall of two wire clamps and one of them connecting rod, the circuit board is located the top of installation base, and the electric wire of circuit board passes the wire storage groove and is connected with external power equipment electrical behavior, the top of circuit board is equipped with actuating mechanism and flabellum body in proper order, actuating mechanism is connected with the flabellum body and drives the flabellum body to rotate, each engaging lug all is located on the lateral wall of framework; a wire storage groove is formed between the side walls of the two wire clamping plates and the connecting rod, so that the fan body is prevented from being scratched with wires in the rotating process, and the wires are prevented from being damaged.

Description

Heat radiation fan

Technical Field

The utility model belongs to the technical field of the fan, especially, relate to a radiator fan.

Background

The fan, as a heat dissipation instrument, extensively apply to in the life, can be for the human body cooling, also can be for the machine cooling, reduce the temperature of surrounding environment, especially for some electronic product, in order to guarantee life-span and efficiency, the requirement to the temperature is higher, can not be in a high temperature state for a long time, radiator fan has just played important effect this moment, along with radiator fan's popularization, people also carried out various transformation to it, not only has the requirement to its function, also pursues more and more beautifully.

The structure of accomodating the electric wire specially is lacked to current fan, and the electric wire of fan arranges in a jumble, easy and electric wire bump when the flabellum rotates to lead to the damaged condition of electric wire to take place.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a radiator fan aims at solving the fan among the prior art and does not possess the structure of accomodating the electric wire specially, and at the in-process that uses, the flabellum cuts off the electric wire easily, leads to the technical problem of product inefficacy.

In order to achieve the above object, an embodiment of the present invention provides a heat dissipation fan, which includes a fan blade body and a frame body, wherein the fan blade body is rotatably connected in the frame body; the heat radiation fan also comprises a circuit board and a driving mechanism; the frame body comprises an installation base, a plurality of connecting rods and two wire clamping plates, wherein the frame body is provided with an accommodating cavity penetrating through two ends of the center of the frame body, the installation base is positioned at the center of the bottom of the accommodating cavity, one end of each connecting rod is fixedly connected with the outer side wall of the installation base, the other end of each connecting rod is fixedly connected with the inner wall of the accommodating cavity, the two wire clamping plates are fixedly connected with the side wall of one connecting rod, a wire storage groove for storing wires is formed between the two wire clamping plates and the side wall of one connecting rod, the circuit board is arranged at the top of the installation base, the wires of the circuit board penetrate through the wire storage groove to be electrically connected with external electric equipment, the top of the circuit board is sequentially provided with the driving mechanism and the fan blade body, the driving mechanism is connected with the fan blade body and drives the fan blade body to rotate, the frame body further comprises a plurality of connecting lugs, and each connecting lug is arranged on the outer side wall of the frame body and used for being connected with external equipment.

Optionally, the mounting base is provided with a mounting groove penetrating the top direction of the mounting base, and the circuit board is fixedly connected with the inner wall of the mounting groove.

Optionally, the mounting base is further provided with a wire outlet groove penetrating through the side wall direction of the mounting base, the wire outlet groove is communicated with the mounting groove, and the electric wire of the circuit board sequentially penetrates through the wire outlet groove and the wire storage groove and then is electrically connected with external power equipment.

Optionally, the two wire-clamping plates are both arranged in a shape of a reverse bar, the two wire-clamping plates are connected with the side wall of one of the connecting rods and respectively form a bayonet for clamping the wire, the two bayonets and a space between the two bayonets jointly form the wire-storing slot, and the two bayonets are arranged in opposite directions.

Optionally, the driving mechanism comprises a stator, a rotor, a rotating shaft and a connecting collar; the stator fixed connection in the top of circuit board, the inner circle of rotor with connect through the magnetic suspension between the outer lane of stator, the inner circle of the connection lantern ring with the outer lane tight fit of rotor is connected, the outer lane of the connection lantern ring with flabellum body tight fit is connected, the pivot is located the stator with in order to be used for supporting between the flabellum body.

Optionally, an assembly cavity penetrating the bottom of the fan blade body is formed in the fan blade body, and the outer ring of the connecting lantern ring is tightly matched and connected with the inner wall of the assembly cavity.

Optionally, be equipped with in the stator and be used for the installation the first sleeve of pivot bottom, be equipped with in the assembly chamber and be used for the installation the second sleeve on pivot top, the bottom of pivot with first sleeve rotates to be connected, the top of pivot with the second sleeve tight fit is connected.

Optionally, a plurality of stabilizing blocks for stabilizing the fan blade body are further arranged in the assembly cavity, each stabilizing block is fixedly connected to the annular direction of the second sleeve, and each stabilizing block is movably connected with the inner ring of the stator.

Optionally, a plurality of reinforcing ribs for fixing the second sleeve are further disposed in the assembly cavity, each reinforcing rib is fixedly connected to the second sleeve in the annular direction, and each reinforcing rib and each stabilizing block are arranged in a staggered manner in the same annular direction.

Optionally, radiator fan still includes the protective cover, the protective cover is located the top of flabellum body, set up a plurality of draw-in grooves that all run through its vertical direction both ends on the flabellum body, each the draw-in groove all follows the annular direction interval arrangement at flabellum body top, the protection is covered and is corresponded each the position of draw-in groove all is equipped with the buckle, each the buckle respectively with each draw-in groove activity joint.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the radiator fan have one of following technological effect at least: the heat radiation fan of the utility model is characterized in that the fan blade body and the frame body are combined, after four connecting lugs and external equipment are positioned, the frame body can be fixed on the external equipment through screws to complete the installation of the device, a containing cavity is arranged in the frame body, the bottom of the containing cavity is provided with an installation base which is fixed in the containing cavity through four connecting rods to realize the fixation between the installation base and the frame body, the bottom of the installation base is provided with a circuit board, the top of the circuit board is provided with a driving mechanism, the top of the driving mechanism is also provided with the fan blade body, after the circuit board is electrified, the electric power is transmitted into the driving mechanism, the driving mechanism can drive the fan blade body to rotate, thereby realizing the heat radiation function, in the device, two wire clamping plates are arranged on the side wall of one connecting rod, a wire storage groove is formed between the two wire clamping plates and the side wall of the connecting rod, the electric wire on the circuit board can penetrate through the wire storage groove and then extend out of the accommodating cavity to be connected with power equipment, so that a power supply is provided for the device, the fan body is prevented from being scratched with the electric wire in the rotating process, and the electric wire is effectively prevented from being damaged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is an exploded schematic view of a cooling fan according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a frame body of a cooling fan according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a fan blade body of a cooling fan according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a protective cover of a cooling fan according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10-fan blade body 11-assembly cavity 12-clamping groove

20-frame 21-mounting base 22-connecting rod

23-line clamping plate 24-accommodating cavity 25-connecting lug

30-circuit board 40-driving mechanism 41-stator

42-rotor 43-rotating shaft 44-connecting lantern ring

50-wire storage groove 60-protective cover 61-buckle

111-second sleeve 112-stabilizing block 113-reinforcing rib

211-mounting groove 212-outlet groove 231-bayonet

411 — first sleeve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1-2, a heat dissipation fan is provided, which includes a fan blade body 10 and a frame body 20, wherein the fan blade body 10 is rotatably connected in the frame body 20; the heat radiation fan further comprises a circuit board 30 and a driving mechanism 40; the frame body 20 comprises an installation base 21, a plurality of connecting rods 22 and two wire clamping plates 23, wherein an accommodating cavity 24 penetrating through two ends of the center of the frame body 20 is formed in the frame body 20, the installation base 21 is located at the center of the bottom of the accommodating cavity 24, one end of each connecting rod 22 is fixedly connected with the outer side wall of the installation base 21, the other end of each connecting rod 22 is fixedly connected with the inner wall of the accommodating cavity 24, the two wire clamping plates 23 are fixedly connected with the side wall of one of the connecting rods 22, a wire storage groove 50 for storing wires is formed between the two wire clamping plates 23 and the side wall of one of the connecting rods 22, the circuit board 30 is arranged at the top of the installation base 21, the wires of the circuit board 30 penetrate through the wire storage groove 50 to be electrically connected with external power equipment, the driving mechanism 40 and the fan blade body 10 are sequentially arranged at the top of the circuit board 30, the driving mechanism 40 is connected with the fan blade body 10 and drives the fan blade body 10 to rotate, the frame body 20 further comprises a plurality of connecting lugs 25, and each connecting lug 25 is arranged on the outer side wall of the frame body 20 and used for being connected with external equipment.

Specifically, the heat dissipation fan of the present invention, because the fan blade body 10 and the frame body 20 are formed, after the four engaging lugs 25 are positioned with the external device, the frame body 20 can be fixed on the external device by screws to complete the installation of the device, the frame body 20 is provided with the accommodating cavity 24, and the bottom of the accommodating cavity 24 is provided with the mounting base 21, the mounting base 21 is fixed in the accommodating cavity 24 by four connecting rods 22 to realize the fixation between the mounting base 21 and the frame body 20, the bottom of the mounting base 21 is provided with the circuit board 30, the top of the circuit board 30 is provided with the driving mechanism 40, the top of the driving mechanism 40 is provided with the fan blade body 10, then after the circuit board 30 is powered on, the electric power is transmitted to the driving mechanism 40, the driving mechanism 40 can drive the fan blade body 10 to rotate, thereby realizing the heat dissipation function, in the device, two wire clamping plates 23 are installed on the side wall of one of the connecting rods 22, a wire storage groove 50 is formed between the side walls of the two wire clamping plates 23 and the connecting rod 22, so that wires on the circuit board 30 can penetrate through the wire storage groove 50 and then extend out of the accommodating cavity 24 to be connected with power equipment, power is provided for the device, the fan body is prevented from being scratched with the wires in the rotating process, and the wires are effectively prevented from being damaged.

In another embodiment of the present invention, as shown in fig. 1-2, the mounting base 21 is provided with a mounting groove 211 penetrating through the top direction thereof, and the circuit board 30 is fixedly connected to the inner wall of the mounting groove 211. Specifically, the mounting base 21 is provided with a circular mounting groove 211, the mounting groove 211 matches with the circuit board 30 in shape, and the circuit board 30 can be fixed by mounting the circuit board 30 in the mounting groove 211, so as to prevent the circuit board 30 from shifting.

In another embodiment of the present invention, as shown in fig. 1-2, the mounting base 21 is further provided with a wire-out groove 212 running through the direction of the side wall thereof, the wire-out groove 212 is communicated with the mounting groove 211, and the electric wire of the circuit board 30 sequentially passes through the wire-out groove 212 and the wire-storing groove 50, and then is electrically connected to the external power equipment. Specifically, an outlet groove 212 has been seted up to the lateral wall direction of installation base 21, after installing circuit board 30 on mounting groove 211, the electric wire on the circuit board 30 can stretch out from outlet groove 212, after passing outlet groove 212 with the electric wire, draw the electric wire and pass the one end entering of wire storage groove 50 again, stretch out and be connected with outside power equipment from the other end of wire storage groove 50 at last, be favorable to the standard of electric wire to arrange, prevent that flabellum body 10 from taking place to scrape when high-speed rotation and between the electric wire, protected the electric wire effectively.

In another embodiment of the present invention, as shown in fig. 1 to 2, two of the wire clamping plates 23 are all in a shape of "l", and two of the wire clamping plates 23 are all connected to one of the side walls of the connecting rod 22 and are respectively formed with bayonets 231 for clamping wires, two of the bayonets 231 and the space between the bayonets 231 jointly constitute the wire storage slot 50, two of the bayonets 231 are reversely disposed. Specifically, two wire clamping plates 23 are fixedly connected to the side wall of one of the connecting rods 22, the two wire clamping plates 23 are all arranged in an 'l' -shape, one bayonet 231 is respectively arranged on the two wire clamping plates 23, the two bayonets 231 are oppositely arranged in the vertical direction, the space between the two bayonets 231 and the two bayonets 231 jointly forms a wire storage groove 50, after the wire passes through the wire outlet groove 212, the wire is drawn and passes through the first bayonet 231, then the wire is drawn and passes through the second bayonet 231 continuously, when the wire extends out of the second bayonet 231, the wire can be connected with external electric equipment, the standard arrangement of the wire is facilitated, the two bayonets 231 which are oppositely arranged can prevent the wire from being cheap upwards or downwards, and the position of the wire is facilitated to be fixed.

In another embodiment of the present invention, as shown in fig. 1, the driving mechanism 40 includes a stator 41, a rotor 42, a rotating shaft 43 and a connecting collar 44; stator 41 fixed connection in the top of circuit board 30, the inner circle of rotor 42 with connect through the magnetic suspension between the outer lane of stator 41, the inner circle of connecting the lantern ring 44 with the outer lane tight fit of rotor 42 is connected, the outer lane of connecting the lantern ring 44 with flabellum body 10 tight fit is connected, pivot 43 is located stator 41 with in order to be used for supporting between the flabellum body 10. In particular, the amount of the solvent to be used,

fix stator 41 at the top of circuit board 30, then establish a rotor 42 at stator 41's outer lane cover, rotor 42's outer lane is overlapped again and is equipped with a connection lantern ring 44, establish flabellum body 10 cover on the outer lane of connection lantern ring 44, so after circuit board 30 circular telegram, electric power passes to in the circuit board 30, circuit board 30 drive stator 41 produces magnetic force, connect through the magnetic suspension between stator 41 and the rotor 42, so rotor 42 will be driven rotatory by stator 41 and drive flabellum body 10 and rotate, be provided with a pivot 43 between stator 41 and the flabellum body 10, pivot 43 and flabellum body 10 tight fit are connected, so flabellum body 10 is when the pivoted, pivot 43 can support flabellum body 10, make flabellum body 10 can obtain a strong point, be favorable to flabellum body 10 to rotate steadily. In another embodiment of the present invention, as shown in fig. 1-2, the fan blade body 10 is provided with an assembly cavity 11 penetrating through the bottom thereof, and the outer ring of the connection sleeve ring 44 is tightly fitted and connected with the inner wall of the assembly cavity 11. Specifically, an assembly cavity 11 is formed at the bottom of the fan blade body 10, the assembly cavity 11 is arranged in a cylindrical shape, and the connecting sleeve ring 44 is sleeved in the assembly cavity 11, so that the fan blade body 10 can be fixed.

In another embodiment of the present invention, as shown in fig. 1 to 3, a first sleeve 411 is disposed in the stator 41 for installation, the first sleeve 111 is disposed at the bottom end of the rotating shaft 43, the second sleeve 111 is disposed in the assembly cavity 11 for installation, the bottom end of the rotating shaft 43 is rotatably connected to the first sleeve 411, and the top end of the rotating shaft 43 is tightly connected to the second sleeve 111. Specifically, the bottom of pivot 43 and first sleeve 411 rotate to be connected, so pivot 43 is when the pivoted, the position of pivot 43 can be fixed to first sleeve 411, prevent that pivot 43 from taking place the skew at the pivoted in-process, the top and the second sleeve 111 tight fit of pivot 43 are connected, so flabellum body 10 is when the pivoted, because pivot 43 has limited the position by first sleeve 411, flabellum body 10 just can not take place the skew at the pivoted in-process like this, be favorable to this device to operate more steadily.

In another embodiment of the present invention, as shown in fig. 1 to 3, a plurality of stabilizing blocks 112 are further disposed in the assembling cavity 11, and are all used for stabilizing the fan blade body 10, each stabilizing block 112 is respectively and fixedly connected to the annular direction of the second sleeve 111, and each stabilizing block 112 is movably connected to the inner ring of the stator 41. Specifically, install four steady blocks 112 in the assembly chamber 11, four steady blocks 112 set up respectively in the annular direction of second sleeve 111 periphery to four steady block 112 interval distribution, four steady blocks 112 all contact with stator 41, and when flabellum body 10 rotated, four steady blocks 112 invaginated in stator 41, can prevent that flabellum body 10 from taking place the skew at the pivoted in-process like this, are favorable to this device to operate more steadily.

In another embodiment of the present invention, as shown in fig. 1 to 3, a plurality of reinforcing ribs 113 for fixing the second sleeve 111 are further disposed in the assembly cavity 11, each of the reinforcing ribs 113 is respectively and fixedly connected to the annular direction of the second sleeve 111, and each of the reinforcing ribs 113 is respectively and dislocated from each of the stabilizing blocks 112 along the same annular direction. Specifically, four reinforcing ribs 113 are further arranged on the outer periphery of the second sleeve 111 in the annular direction, and the four reinforcing ribs 113 are distributed at intervals, so that the firmness of connection between the second sleeve 111 and the assembly cavity 11 can be enhanced, separation between the second sleeve 111 and the assembly cavity 11 is prevented, and the four reinforcing ribs 113 and the four stabilizing blocks 112 are arranged in a staggered manner, so that collision between the four reinforcing ribs 113 and the four stabilizing blocks 112 can be prevented, and the processing process is simplified.

In another embodiment of the present invention, as shown in fig. 1 to 4, the heat dissipation fan further includes a protective cover 60, the protective cover 60 is disposed on the top of the fan blade body 10, a plurality of slots 12 are disposed on the fan blade body 10 and all run through the two ends of the fan blade body in the vertical direction, each of the slots 12 is disposed along the annular direction at the top of the fan blade body 10 at intervals, the protective cover 60 is disposed at a position corresponding to each of the slots 12 and is provided with a buckle 61, and each of the buckles 61 is movably connected with each of the slots 12. Specifically, a protective cover 60 is installed at the top of flabellum body 10, protective cover 60 can prevent that the dust from getting into stator 41 or rotor 42 in to cause the pollution to stator 41 or rotor 42, four draw-in grooves 12 have been seted up at the top of flabellum body 10, four draw-in grooves 12 are along the hoop direction interval arrangement at flabellum body 10 top, it is equipped with four buckles 61 to correspond on the protective cover 60, after inserting protective cover 60 into draw-in groove 12, rotate protective cover 60, make buckle 61 and draw-in groove 12 joint, can fix protective cover 60.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A cooling fan comprises a fan blade body and a frame body, wherein the fan blade body is rotatably connected in the frame body; the method is characterized in that: the heat radiation fan also comprises a circuit board and a driving mechanism; the frame body comprises an installation base, a plurality of connecting rods and two wire clamping plates, wherein the frame body is provided with an accommodating cavity penetrating through two ends of the center of the frame body, the installation base is positioned at the center of the bottom of the accommodating cavity, one end of each connecting rod is fixedly connected with the outer side wall of the installation base, the other end of each connecting rod is fixedly connected with the inner wall of the accommodating cavity, the two wire clamping plates are fixedly connected with the side wall of one connecting rod, a wire storage groove for storing wires is formed between the two wire clamping plates and the side wall of one connecting rod, the circuit board is arranged at the top of the installation base, the wires of the circuit board penetrate through the wire storage groove to be electrically connected with external electric equipment, the top of the circuit board is sequentially provided with the driving mechanism and the fan blade body, the driving mechanism is connected with the fan blade body and drives the fan blade body to rotate, the frame body further comprises a plurality of connecting lugs, and each connecting lug is arranged on the outer side wall of the frame body and used for being connected with external equipment.

2. The heat dissipating fan of claim 1, wherein: the mounting base is provided with a mounting groove penetrating through the top direction of the mounting base, and the circuit board is fixedly connected with the inner wall of the mounting groove.

3. The heat dissipating fan of claim 2, wherein: the mounting base is further provided with a wire outlet groove penetrating through the side wall direction of the mounting base, the wire outlet groove is communicated with the mounting groove, and the electric wire of the circuit board sequentially penetrates through the wire outlet groove and the wire storage groove and then is electrically connected with external power equipment.

4. The heat dissipating fan according to any one of claims 1 to 3, wherein: the two wire clamping plates are all arranged in a shape of a reverse L, the two wire clamping plates are connected with the side wall of one of the connecting rods and respectively form a bayonet for clamping wires, the two bayonets and a space between the two bayonets jointly form the wire storage groove, and the two bayonets are arranged in a reverse direction.

5. The heat dissipating fan according to any one of claims 1 to 3, wherein: the driving mechanism comprises a stator, a rotor, a rotating shaft and a connecting lantern ring; the stator fixed connection in the top of circuit board, the inner circle of rotor with connect through the magnetic suspension between the outer lane of stator, the inner circle of the connection lantern ring with the outer lane tight fit of rotor is connected, the outer lane of the connection lantern ring with flabellum body tight fit is connected, the pivot is located the stator with in order to be used for supporting between the flabellum body.

6. The heat dissipating fan of claim 5, wherein: the fan blade body is provided with an assembly cavity penetrating through the bottom of the fan blade body, and the outer ring of the connecting lantern ring is tightly matched and connected with the inner wall of the assembly cavity.

7. The heat dissipating fan of claim 6, wherein: be equipped with in the stator and be used for the installation the first sleeve of pivot bottom, be equipped with in the assembly cavity and be used for the installation the second sleeve on pivot top, the bottom of pivot with first sleeve rotates to be connected, the top of pivot with second sleeve tight fit is connected.

8. The heat dissipating fan of claim 7, wherein: and a plurality of stabilizing blocks which are used for stabilizing the fan blade body are also arranged in the assembly cavity, each stabilizing block is fixedly connected to the annular direction of the second sleeve respectively, and each stabilizing block is movably connected with the inner ring of the stator.

9. The heat dissipating fan of claim 8, wherein: and a plurality of reinforcing ribs which are used for fixing the second sleeve are arranged in the assembly cavity, the reinforcing ribs are respectively and fixedly connected to the annular direction of the second sleeve, and the reinforcing ribs and the stabilizing blocks are arranged in a staggered manner along the same annular direction.

10. The heat dissipating fan according to any one of claims 1 to 3, wherein: the cooling fan further comprises a protective cover, the protective cover is arranged at the top of the fan blade body, a plurality of clamping grooves which penetrate through two ends of the fan blade body are formed in the fan blade body, the clamping grooves are arranged at intervals along the annular direction of the top of the fan blade body, buckles are arranged at positions, corresponding to the clamping grooves, of the protective cover, and the buckles are movably clamped with the clamping grooves respectively.

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