Fan blade unit and fan

Abstract

Provided are a fan blade unit and a fan. The fan blade unit comprises a hub (1) and a plurality of blades (2) that are uniformly distributed in the circumferential direction of the hub (1); each blade (2) comprises a blade root (21) and a blade tail (22); the blade tail (22) is twisted relative to the blade root (21); the blade roots (21) of the plurality of blades (2) are connected to the hub (1). The blade tail (22) is twisted relative to the blade root (21), and a twisted part has the function of converging inlet airflow, so that airflow blown out by the fan blade unit is more gathered, an air blowing effect is improved, the airflow is formed, and the axial pressure of the twisted part is increased, such that the airflow flowing into the blades (2) can flow out at a larger rate, thereby increasing the air supply rate of the fan blade unit, and thus improving the wind effect and improving the user experience.

Description

Fan blades and fans Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a fan blade and a fan. Background Art

[0002] In recent years, people are increasingly pursuing a more convenient life. In order to meet the demand for practical fans in outdoor activities or other life scenarios, various fans have appeared on the market. Among them, fans generally include fan blades. However, the fan blades are inclined at an angle of 10 degrees to the horizontal plane. When in use, when the fan blades rotate, the air flow is driven by the inclined fan blades to achieve wind output. However, the wind output effect is relatively limited, which will affect the fan's blowing effect to a certain extent, and therefore the practicality is limited.

[0003] Summary of the Invention

[0004] The main purpose of this application is to provide a fan blade and a fan to solve the problem of how to improve the fan's blowing effect. Compared with the existing technology, the fan blade provided by the utility model has a twisted tail portion compared to the root portion, and the twisted portion has a converging effect on the incoming airflow, so that the airflow blown out by the fan blade is more concentrated, improving the blowing effect, forming an air flow at the twisted portion, and improving the efficiency of the airflow of the blade, thereby improving the wind effect and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] This application will illustrate the embodiments with reference to the accompanying drawings. The drawings in this application are only used to describe the embodiments for illustrative purposes. Without departing from the principles of this application, those skilled in the art can easily make other embodiments according to the steps described below by following the description.

[0006] FIG1 is a perspective view of a fan blade provided by an embodiment of the present utility model;

[0007] FIG2 is a perspective view of a fan blade provided by an embodiment of the present invention from another angle;

[0008] FIG3 is an exploded perspective view of a fan provided by an embodiment of the present invention;

[0009] FIG4 is a perspective view of a fan provided by an embodiment of the present utility model;

[0010] FIG5 is a schematic diagram of the overall structure of this embodiment;

[0011] FIG6 is a schematic diagram of the first structure of the fan body after rotation in this embodiment;

[0012] FIG7 is a schematic diagram of a second structure of the fan body after rotation in this embodiment;

[0013] FIG8 is a first exploded view of the overall structure of this embodiment;

[0014] FIG9 is a schematic structural diagram of the fan body with the cover removed in this embodiment;

[0015] FIG10 is an enlarged view corresponding to detail A in FIG9 ;

[0016] Figure 11 is a schematic structural diagram of the cover body in this embodiment;

[0017] FIG12 is an exploded view of the control circuit board and the connection portion on the fan body in this embodiment;

[0018] FIG13 is a second exploded view of the overall structure of this embodiment;

[0019] FIG14 is an exploded view of the handheld handle in this embodiment;

[0020] FIG15 is a schematic structural diagram of the bottom cover of the handheld handle in this embodiment;

[0021] FIG16 is an enlarged view of detail B corresponding to FIG13;

[0022] FIG17 is a schematic diagram of a first structural example of a rotary connector according to the present embodiment;

[0023] FIG18 is a schematic diagram of a second structural embodiment of the rotary connector;

[0024] FIG19 is a third exploded view of the overall structure of this embodiment;

[0025] FIG20 is a fourth exploded view of the overall structure of this embodiment;

[0026] FIG21 is a schematic structural diagram of the fan body in this embodiment;

[0027] FIG22 is a schematic diagram of the overall structure of this embodiment;

[0028] FIG23 is a first exploded view of this embodiment;

[0029] FIG24 is an exploded view of the fan body in this embodiment;

[0030] FIG25 is a schematic structural diagram of the embodiment after removing the cover and the control circuit board;

[0031] FIG26 is an enlarged view corresponding to portion A in FIG25 ;

[0032] Figure 27 is a schematic structural diagram of the cover body in this embodiment;

[0033] FIG28 is an exploded view of the fan body and the control circuit board in this embodiment;

[0034] FIG29 is an exploded view of the handheld handle and power supply in this embodiment;

[0035] FIG30 is a schematic diagram of the overall structure of this embodiment;

[0036] FIG31 is a schematic diagram of the first structure of the fan body after rotation in this embodiment;

[0037] FIG32 is a schematic diagram of a second structure of the fan body after rotation in this embodiment;

[0038] FIG33 is a first exploded view of the fan body in this embodiment;

[0039] FIG34 is a first exploded view of the fan body in this embodiment;

[0040] FIG35 is a schematic diagram of a first structural example of the front shield in this embodiment;

[0041] FIG36 is an enlarged view corresponding to detail A in FIG35 ;

[0042] FIG37 is a schematic diagram of a second structure of the front shield in this embodiment;

[0043] Figure 38 is a schematic structural diagram of the rear shield in this embodiment;

[0044] FIG39 is a schematic structural diagram of the first circuit board in this embodiment;

[0045] FIG40 is a schematic structural diagram of the drive motor in this embodiment;

[0046] FIG41 is a third exploded view of the fan body in this embodiment;

[0047] FIG42 is an exploded view of the handheld body in this embodiment;

[0048] FIG43 is a schematic structural diagram of a portable fan provided by the present application;

[0049] FIG44 is an exploded schematic diagram of a portable fan provided by the present application;

[0050] FIG45 is a cross-sectional view of a portable fan provided by the present application in one direction;

[0051] FIG46 is a cross-sectional view of the portable fan provided by the present application from another direction;

[0052] FIG47 is a front view of the connection frame and the first connection member provided by the present application;

[0053] FIG48 is a schematic perspective view of a connection frame and a first connection member provided by the present application;

[0054] FIG49 is a schematic structural diagram of the air inlet frame, air outlet frame and fan blades provided by the present application;

[0055] Figure 50 is a three-dimensional view of a fan blade provided by the present application in one direction;

[0056] FIG51 is a right side view of the fan blade provided by the present application;

[0057] FIG52 is an exploded schematic diagram of the handheld portion provided by the present application;

[0058] FIG53 is a schematic diagram of the air outlet portion provided by the present application when it rotates backward to the maximum angle;

[0059] FIG54 is a schematic diagram of the air outlet portion provided by the present application rotating forward to the maximum angle;

[0060] FIG55 is a schematic diagram of the three-dimensional structure of a fan blade according to a specific embodiment of the present application;

[0061] FIG56 is a schematic structural diagram of a first perspective view of a specific embodiment of the present application;

[0062] FIG57 is a schematic structural diagram of a fan blade from a second perspective according to a specific embodiment of the present application;

[0063] Figure 58 is a structural schematic diagram of the blade cross section of a specific embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0065] The terms "first," "second," and the like in this application are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0066] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0067] Option 1

[0068] 1 to 4 , the present invention provides a fan blade and a fan to solve the problem of how to improve the efficiency of airflow of the blades, thereby enhancing wind efficiency and improving the practicality of the fan.

[0069] Example 1

[0070] A fan blade includes a hub 1 and a plurality of blades 2 uniformly distributed circumferentially along the hub 1; as shown in Figures 1 and 2, the blades 2 include a blade root 21 and a blade tail 22, the blade tail 22 being twisted relative to the blade root 21, and the blade roots 21 of the plurality of blades being connected to the hub 1. During use, by twisting the blade tail 22 relative to the blade root 21, the twisted portion converges the incoming airflow, causing the airflow blown out by the fan blade to be more concentrated, improving the blowing effect and enhancing the user's user experience. The twisted portion converges the incoming airflow, causing the airflow blown out by the fan blade to be more concentrated, increasing axial pressure, forming an air flow, and improving the efficiency of the airflow flow of the blade, thereby improving the wind effect. By connecting the blade root 21 of the blade to the hub 1, the stability of the blade 2 during fan rotation is enhanced, thereby improving the stability of the fan blade.

[0071] Furthermore, the blade 2 also includes a first side 23 and a second side 24, and the thickness of the first side 23 of the blade 2 is greater than the thickness of the second side 24 of the blade 2; the distance from the first side 23 of the blade root 21 to the second side 24 of the blade root 21 is a first width, and the first width range is greater than or equal to 16.0 mm and less than or equal to 16.5 mm; the distance from the first side 23 of the blade tail 22 to the second side 24 of the blade tail 22 is a second width, and the second width range is greater than or equal to 15.0 mm and less than or equal to 15.5 mm. Preferably, the first width is 16 mm and the second width is 15.2 mm. When in use, the first side 23 faces the air inlet side and the second side 24 faces the air outlet side. The thickness of the first side 23 of the blade 2 is greater than the thickness of the second side 24 of the blade 2, which accelerates the speed of the airflow from the first side 23 to the second side 24 after entering the blade 2, thereby improving the wind guiding effect and the air exhaust effect. The distance from the first side 23 of the blade root 21 to the second side 24 of the blade root 21 is greater than the distance from the first side 23 of the blade tail 22 to the second side 24 of the blade tail 22, so that the blade tail 22 is smaller in volume and lighter in weight than the blade root 21, reducing the resistance encountered by the blade 2 during the rotation of the fan blade, reducing energy consumption, and increasing the fan blade rotation rate, thereby increasing the air supply rate.

[0072] The angle between the line connecting the first side 23 of the blade root 21 and the second side 24 of the blade root 21 and the radial plane direction of the hub 1 is a first angle, and the range of the first angle is greater than or equal to 25 degrees and less than or equal to 75 degrees; the angle between the line connecting the first side 23 of the blade tail 22 and the second side 24 of the blade tail 22 and the line connecting the first side 23 of the blade root 21 and the second side 24 of the blade root 21 is a second angle, and the range of the second angle is greater than or equal to 5 degrees and less than or equal to 10 degrees. Preferably, the first angle is 75 degrees. When in use, the second angle is the twisting angle toward the user. The first angle is the installation angle of the blade 2 on the hub 1. By setting the installation inclination angle toward the user, the area of ​​the blade 2 is increased while the hub 2 is of the same size, thereby increasing the air intake volume. The second angle is the twisting angle of the blade tail 22 compared to the blade root 21. By setting the twisting toward the user, the axial pressure is increased in the twisting part, so that the airflow flowing into the blades 2 can flow out at a higher rate, thereby increasing the air supply rate of the fan blades, improving the wind efficiency, and enhancing the user experience.

[0073] Specifically, the number of the blades is 9 to 15. Preferably, in this embodiment, the number of the blades is 12. The specific number can be adjusted by those skilled in the art according to the actual working environment.

[0074] Furthermore, the hub 1 includes an annular body 11 and an air guide cone 12 connected to the annular body 11. The annular body 11 and the air guide cone 12 are connected to form a cavity. The provision of the annular body 11 can make it more stable with the blade 2. The provision of the air guide cone 12 connected to the annular body 11 reduces the airflow resistance encountered by the fan blade when it is in use. The air guide cone 12 has an air guiding effect, thereby improving the air supply effect and enhancing the user experience. The cavity formed by the connection between the annular body 11 and the air guide cone 12 can accommodate components such as the motor when the fan blade is installed.

[0075] Specifically, a circular concave platform 13 is provided at the center of the air guide cone 12. The concave platform 13 includes a bottom plate 123 and an inner conical wall 122 connected to the bottom plate 123. The inner conical wall 122 and the annular body 11 are connected via an outer conical wall 121. By providing the outer conical wall 121 connected to the annular body 11, a conical air guide surface is provided for the air inlet side, allowing the incoming air to flow along the outer conical wall 121 into between the blades 2, thereby improving wind efficiency.

[0076] Furthermore, an annular protrusion 124 is provided on the side of the bottom plate 123 facing the cavity, and the diameter of the annular protrusion 124 is smaller than that of the bottom plate 123. The provision of the annular protrusion 124 provides axial positioning for the rotation of the fan blades, and a rotating shaft can be sleeved within the annular protrusion 124, thereby improving the stability of the axial rotation of the fan blades. At the same time, the connection between the annular protrusion 124 and the bottom plate 123 is a smooth curved surface. Therefore, the annular protrusion 124 can reduce the impact of the airflow on the inlet side of the bottom plate 123 on the overall stability, making the fan blades more stable as a whole.

[0077] Specifically, a plurality of connecting plates 14 are provided on the side of the inner conical wall 122 facing the cavity, and the connecting plates 14 are connected to the outer conical wall 121. By providing the connecting plates 14 to connect the inner conical wall 122 and the outer conical wall 121, the stability of the connection between the outer conical wall 121 and the inner conical wall 122 is enhanced, thereby improving the stability of the fan blade as a whole.

[0078] The connection between the outer cone wall 121 and the inner cone wall 122 and the connection between the inner cone wall 122 and the bottom plate 123 are both arc-shaped chamfers. By setting the connection between the outer cone wall 121 and the inner cone wall 122 and the connection between the inner cone wall 122 and the bottom plate 123 as arc-shaped chamfers, it can be achieved that the fan blades are easier to demould during production and are less likely to be scratched compared to right-angled edges during later installation and use. It can also reduce the resistance encountered by the airflow when entering, thereby improving the wind efficiency. The width of the connection between the connecting plate 14 and the outer cone wall 121 and the width of the connection between the connecting plate 14 and the inner cone wall 122 are both greater than the width at the center of the connecting plate 14. The connection between the connecting plate 14 and the inner cone wall 122 and the connection between the connecting plate 14 and the outer cone wall 121 are both arc-shaped chamfers. By setting the width of the connection between the connecting plate 14 and the outer cone wall 121 and the width of the connection between the connecting plate 14 and the inner cone wall 122 to be greater than the width at the center of the connecting plate 14, the connection of the connecting plate 14 has a greater ability to withstand external forces. The arc-shaped chamfers at the connection between the connecting plate 14 and the outer cone wall 121 and the outer cone wall can not only make demolding easier during production, but also disperse the wind force exerted on the inner cone wall 122 and the outer cone wall 121, thereby enhancing the reliability of the connection between the inner cone wall 122 and the outer cone wall 121 and improving the stability of the fan blades.

[0079] In some embodiments, the fan blade also includes a blade tail 22 connected to the blade 2, and a fixed ring arranged on the outside of the blade 2. By setting the fixed ring, on the one hand, the blade tails 22 of the multiple blades 2 will not collide when the fan blade rotates at high speed to cause safety hazards, thereby enhancing the stability of the blade 2. On the other hand, it also avoids the circumferential outflow of airflow when the fan blade rotates, thereby achieving the effect of gathering wind and improving user experience.

[0080] Example 2

[0081] This embodiment discloses a fan including the fan blades described in Example 1. As shown in Figures 3 and 4,

[0082] The fan further includes a shell 3 connected to the hub 1 , the shell 3 including a front cover 31 and a rear cover 32 , a switch button 33 is provided on the front cover 31 , a charging port 36 is provided on the rear cover 32 , a power supply 37 is built into the shell 3 on the side away from the hub 1 , an air outlet 34 and an air inlet 35 are provided on the shell, the air guide cone 12 faces the air inlet 35 , a drive motor 38 is provided between the air outlet 34 and the hub 1 , the switch button 33 , the charging port 36 and the drive motor 38 are respectively electrically connected to the power supply 37 , the charging port 36 is used to charge the power supply 37 , and the switch button 33 is used to control the drive motor 38 to be electrically connected to the power supply 37 ; when in use, pressing the switch button 33 electrically connects the drive motor 38 to the power supply 37 , and under the drive of the drive motor 38 , the blades 2 rotate with the hub 1 , thereby driving the air flow from the air inlet 35 to the air outlet 34 , thereby achieving the air outlet effect and improving the user experience. Preferably, the switch button 33 is located on the side of the fan housing 3 facing the user for easy operation; the charging port 36 is located on the side of the fan housing 3 facing away from the user. In some embodiments, a dust cover can be provided on the charging port 36 to prevent dust, water, etc. from entering the charging port.

[0083] The utility model provides a fan blade and a fan, which reduces the resistance of air flowing through the fan blade by twisting the blade tail 22 compared to the blade root 21, forms an air flow at the twisted part, improves the efficiency of the air flow of the blade 2, thereby improving the wind effect and user experience; and the thickness of the first side 23 of the blade 2 is greater than the thickness of the second side 24 of the blade, further reducing the resistance of air entering the blade, increasing the axial pressure of the twisted part, so that the air flow flowing into the blade 2 can flow out at a higher rate, thereby increasing the air supply rate of the fan blade; through the first side 23 of the blade root 21, the thickness of the second side 24 of the blade is greater than the thickness of the second side 24 of the blade, further reducing the resistance of air entering the blade, increasing the axial pressure of the twisted part, so that the air flow between the blades 2 can flow out at a higher rate, thereby increasing the air supply rate of the fan blade; The distance from one side 23 to the second side 24 of the blade root 21 is greater than the distance from the first side 23 of the blade tail 22 to the second side 24 of the blade tail 22, so that the width of the blade tail 22 is smaller than the width of the blade root 21, reducing the overall weight of the fan while reducing the energy consumption of the fan rotation; by arranging the air guide cone 12 on the hub 1, the air outlet effect is improved; by arranging arc chamfers at the connection between the outer cone wall 121 and the inner cone wall 122 and the connection between the inner cone wall 122 and the bottom plate 123, it is convenient to demold during processing, and the resistance to wind is reduced, thereby improving the user experience.

[0084] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] Option 2

[0086] Please refer to FIG. 5 . This embodiment relates to a handheld fan with a rotatable handle, which includes a fan body 100 and a handheld handle 200 .

[0087] Specifically, the fan body 100 is rotatably assembled with the handheld handle 200, so that the user can independently adjust the air supply direction of the fan body 100. It should be noted that the fan body 100 can rotate clockwise or counterclockwise relative to the handheld handle 200. Please refer to Figure 6. The fan body 100 rotates clockwise relative to the handheld handle 200 so that the user can adjust the air supply angle of the fan body 100 when using it around the neck. Please refer to Figure 7. After the fan body 100 rotates counterclockwise relative to the handheld handle 200, the handheld handle 200 can be used as the base of the fan body 100, so that the handheld fan can be placed on a desktop or other tabletop for use, thereby realizing the diversified use of the handheld fan.

[0088] Referring to Figures 8 to 12 , in one embodiment, a connection portion 110 is provided on the fan body 100 near the handheld handle 200. Connection portion 110 comprises a connector 111 and a cover 112. One end of connector 111 is connected to the fan body 100, and the other end extends toward the handheld handle 200. A first mounting cavity 101 is provided on connector 111. A cover 112 is connected to connector 111, thereby enclosing first mounting cavity 101.

[0089] In one embodiment, the connector 111 is integrally formed with the fan body 100. In other embodiments, the connector 111 and the fan body 100 may be connected by adhesive fixation, screw fixation, snap-fit ​​connection, etc.

[0090] Referring to Figures 8 to 12 , in one embodiment, a snap-fit ​​portion 1121 is provided on the side of the cover 112 near the fan body 100, and a snap-fit ​​groove 1122 is provided on the snap-fit ​​portion 1121. A snap-fit ​​joint 1111 is protruding from the inner sidewall of the connector 111 near the fan body 100, and the snap-fit ​​joint 1111 is adapted to fit into the snap-fit ​​groove 1122, thereby achieving a fixed assembly between the cover 112 and the connector 111.

[0091] 8 to 12 , in this embodiment, two engaging portions 1121 and two engaging slots 1122 are provided, and correspondingly, two engaging joints 1111 are also provided. In other embodiments, the engaging slots 1122 may also be provided on the connector 111, and the engaging joints 1111 may be provided on the cover.

[0092] Referring to Figures 8 to 12 , in one embodiment, a plug post 1123 is provided on the side of the cover 112 away from the fan body 100. A corresponding plug interface 1112 is provided on the side of the connector 111 away from the fan body 100. The plug interface 1112 mates with the plug post 1123, thereby providing positioning and pre-fixing for the assembly of the cover 112 and the connector 111, and facilitating the snap-fit ​​assembly between the snap-fit ​​groove 1122 and the snap-fit ​​connector 1111.

[0093] Please refer to Figures 8 to 12. In one embodiment, a first long fixing column 1113 is protruding from the bottom of the first installation cavity 101 away from the fan body 100, and the cover body 112 is also fixed to the first long fixing column 1113 on the side away from the fan body 100 by fastening screws.

[0094] It should be noted that when the cover 112 and the connector 111 are assembled, the plug connector 1112 and the plug post 1123 are first plugged in to fix the installation position of the cover 112 and the connector 111; secondly, the cover 112 is moved toward the connector 111 by pressing, and the clamping connector 1111 is engaged with the clamping groove 1112, thereby fixing the side of the cover 112 close to the fan body 100; finally, the cover 112 is assembled by fastening the screws through the threaded holes on the cover 112 and the first long fixing post 1113, thus finally fixing the cover 112 and the connector 111. The cover 112 and the connector 111 arranged in this way can effectively improve the reliability of the assembly between the cover 112 and the connector 111.

[0095] Please refer to Figures 8 to 12. In one embodiment, an anti-over-rotation member 1125 is assembled on the cover body 112. An assembly column (not shown in the drawings) is provided on the anti-over-rotation member 1125 on the side close to the cover body 112. The assembly column penetrates into the cover body 112 and has an interference fit with the cover body 112.

[0096] In this embodiment, the anti-overrotation member 1125 is a rubber member, and the cover 112 is provided with a strip-shaped groove 1126 for accommodating the anti-overrotation member 1125. The head of the fastening screw that fastens the cover 112 to the connector 111 is located in the strip-shaped groove 1126. The provision of the anti-overrotation member 1125 can cover the fastening screw, thereby ensuring the aesthetic appearance of the fan body 100.

[0097] 8 to 12 , in one embodiment, a control circuit board 300 is installed in the installation cavity 101 . The control circuit board 300 includes a first circuit board 301 and a second circuit board 302 .

[0098] Specifically, the second circuit board 302 is located at the bottom of the first mounting cavity 101 and is fixed to the bottom wall of the first mounting cavity 101 by fastening screws. The first circuit board 301 is supported by the second and third long fixing posts 1114, 1115 and is fixedly assembled to the second and third long fixing posts 1114, 1115 by fastening screws (not shown).

[0099] Referring to Figures 8 to 12 , in one embodiment, a positioning protrusion 1116 is provided on the top of the first long fixing post 1113, and a positioning hole 301 is provided on the first circuit board 310 to mate with the positioning protrusion 1116. During assembly of the first circuit board 310, the positioning protrusion 1116 and the positioning hole 301 facilitate positioning, thereby facilitating the assembly of the fastening screws with the second long fixing post 1114 and the third long fixing post 1115.

[0100] Please refer to Figures 8 to 12. In another embodiment, a first short fixing column 1117 and a second short fixing column 1118 are further provided at the bottom of the first installation cavity 101, and the second circuit board 320 is fixedly assembled with the first short fixing column 1117 and the second short fixing column 1118 by fastening screws (not shown in the drawings).

[0101] Referring to Figures 8 to 12 , in one embodiment, a gear switch 311 is provided on the first circuit board 310. A gear button 1124 is provided on the cover 112, which passes through the cover 112 and is engaged with the gear switch 311. A power switch (not shown) is provided on the second circuit board 320, and a power button 1119 (see Figure 1 ) is provided on the connector 111, which passes through the connector 1111 and is engaged with the power switch.

[0102] Referring to Figures 13 and 14 , in one embodiment, the handheld handle 200 comprises a bottom cover 210, a top cover 220, and side covers 230. Specifically, the side of the bottom cover 210 proximate the fan body 100 is pivotally assembled with the connecting portion 110, and the second mounting cavity 201 is provided on the bottom cover 210. The top cover 220 is detachably assembled with the bottom cover 210 to enclose the second mounting cavity 201. Two side covers 230 are provided, both of which are snap-fitted to the bottom cover 210.

[0103] It should be noted that a power supply 400 is disposed within the second mounting cavity 201 and is electrically connected to the control circuit board 300 via a wire 500. The detachable or snap-fit ​​assembly between the bottom cover 210, top cover 222, and side cover 230 is conventional in this field and will not be described in detail in this embodiment.

[0104] Referring to Figure 13 , in one embodiment, the handheld fan further includes a rotating connector 600. A portion of the rotating connector 600 is connected to the fan body 100, and another portion is connected to the handheld handle 200. The rotating connector 600 is used to achieve rotational assembly between the fan body 100 and the handheld handle 200. In other embodiments, the handheld handle 200 may be provided with an integrally formed rotating shaft structure, or the fan body 100 may be provided with an integrally formed rotating shaft structure, thereby achieving rotational assembly between the fan body 100 and the handheld handle 200.

[0105] Referring to Figures 13, 16, 17, and 18, the rotating connector 600 further includes a fixed portion 610, a rotating shaft portion 620, and a mounting ear 630. Specifically, the fixed portion 610 is connected to the handheld handle 200 and is confined within a housing on the handheld handle 200 near the fan body 100. It should be noted that when the fan body 100 and the handheld handle 200 move relative to each other, the fixed portion 610 and the handheld handle 200 remain relatively stationary. The rotating shaft portion 620 is connected to one end of the fixed portion 610 and passes through the handheld handle 200 to be rotatably assembled with the fan body 100. The mounting ear 630 is connected to the side of the fixed portion 610 away from the rotating shaft portion 620 and is provided with a lanyard hole 601. The lanyard hole 610 cooperates with a neck lanyard (not shown in the drawings), allowing the handheld fan to be worn around the neck.

[0106] Referring to Figures 13, 16, 17, and 18, in one embodiment, an axially extending escape groove 602 is provided on the rotating shaft portion 620. The escape groove 602 radially divides the rotating shaft portion 620 into two portions. When the rotating connector 600 is assembled with the handle 200 and the connecting portion 110, the two portions of the rotating shaft portion 602 elastically deform and move closer together, thereby reducing the size of the rotating shaft portion 620. The provision of the escape groove 602 thus enhances the elastic deformation capability of the rotating shaft portion 620, facilitating its insertion through the handle 200 and assembly with the connecting portion 110. Furthermore, the provision of the escape groove 602 allows the wire 500 to pass through, thereby facilitating connection between the wire 500 and the control circuit board 300 and the power supply 400.

[0107] Referring to Figure 17 , in one embodiment, an annular groove 640 is provided at the junction of the fixing portion 610 and the rotating shaft portion 620. This annular groove 640 is also radially divided into two portions by the avoidance groove 602. The provision of the annular groove 604 further enhances the elastic deformation capability of the rotating shaft portion 620, facilitating its installation.

[0108] 17 and 18 , in one embodiment, a wiring groove 611 is provided on the fixing portion 610 . The wiring groove 611 radially extends from the edge of the fixing portion 610 to the root of the mounting ear 630 , and the wiring groove 611 is connected to the avoidance groove 604 .

[0109] Referring to Figures 17 and 18 , in one embodiment, the rotating shaft portion 620 is provided with an end 621 on a side away from the fixing portion 610, and the sidewall of the end 621 is an inclined surface 622. The cross-sectional dimension of the end 621 on the side away from the fixing portion 610 is smaller than the cross-sectional dimension of the end 621 on the side closer to the fixing portion 610, so that the rotating shaft portion 620 can be inserted into the connector 110 (see Figure 13 ).

[0110] It should be noted that after the shaft portion 620 penetrates the connecting portion 110 , the end surface of the end head 621 close to the fixing portion 610 abuts against the inner wall of the connecting portion 110 , thereby fixing the shaft portion 620 to the connecting portion 110 .

[0111] Referring to Figures 13, 16, 17, and 18, in one embodiment, a limiting end 612 is provided on the fixing portion 610, and a limiting portion 211 is provided on the bottom cover 210 of the handheld handle 200 near the connecting portion 110. When the handheld handle 200 rotates relative to the fan body 100, the limiting end 612 cooperates with the limiting portion 211 to keep the fixing portion 610 and the handheld handle 200 relatively stationary. In this embodiment, two limiting ends 612 are provided, and the two limiting ends 612 are symmetrically arranged around the axis of the rotating connector 600. Correspondingly, two limiting portions 211 are also provided on the bottom cover 210.

[0112] Continuing to refer to Figures 13, 16, 17, and 18, in one embodiment, a positioning block 212 is provided on the bottom cover 210 of the handheld handle 200, and a positioning groove 613 is provided on the fixing portion 610 to match the positioning block 212. When the rotating connector 600 is assembled, the cooperation between the positioning block 212 and the positioning groove 613 can prevent the two limiting ends 612 from being installed in reverse.

[0113] Referring to Figure 19 , in one embodiment, a damping rubber ring 700 is disposed between the rotating shaft 620 and the connecting portion 110 to achieve a damping connection between the rotating shaft 620 and the connecting portion 110. This allows the fan body 100 to be fixed in any position after rotation, facilitating adjustment of the air delivery angle of the fan body 100.

[0114] Referring to Figures 19 and 20 , in one embodiment, a plug-in post 231 is provided on the inner sidewall of the side cover 230, and the plug-in post 231 protrudes toward the connecting portion 110. A plug-in slot 614 is provided on the fixing portion 610. When the side cover 230 and the bottom cover 210 are assembled, the plug-in post 231 is inserted into the plug-in slot 614, further enhancing the secure connection between the rotating connector 600, the handheld handle 200, and the fan body 100, thereby preventing the rotating connector 600 from being stuck and rebounding.

[0115] 19 and 20 , in one embodiment, a spherical groove 234 is provided on the side of the side cover 230 close to the fan body 211 , and a through groove 235 is provided at the bottom of the spherical groove 234 , and the mounting ear 630 passes through the through groove 235 and is accommodated in the spherical groove 234 .

[0116] Referring to Figures 19 to 21 , in one embodiment, a limiting slot 101 is provided on the connecting portion 110. A mounting hole 201 is provided on the bottom cover 210 near the fan body 100, and a limiting post 233 is provided on the side cover 230 near the bottom cover 210. The limiting post 233 extends through the mounting hole 201, and the end of the limiting post 233 away from the side cover 230 is received in the limiting slot 101, thereby cooperating with the limiting slot 101 to limit the rotational angle between the fan body 100 and the handle 200.

[0117] Option 3

[0118] This embodiment relates to a handheld fan that is small in size, rechargeable, and easy for users to carry around. Referring to Figures 22 and 23 , the handheld fan includes a fan body 100 , a handheld handle 200 , a control circuit board 300 , and a power supply 400 .

[0119] Referring to Figures 22 to 29 , the fan body 100 is specifically provided with a connecting portion 110 having a first mounting cavity 101 therein. A handle 200 is connected to the connecting portion 110 and a second mounting cavity 201 is provided therein. A control circuit board 300 is installed in the first mounting cavity 101 and is electrically connected to the fan body 100 so that the control circuit board 300 controls the fan body 100. A power supply 400 is installed in the second mounting cavity 201 and is electrically connected to the control circuit board 300 via a wire 500.

[0120] Please refer to Figures 28 and 29. It should be noted that the first installation cavity 101 and the second installation cavity 201 are both independent cavities. Such a setting can not only effectively prevent the problem of electromagnetic interference to the control circuit board 300 caused by the power supply 400 when supplying power, thereby causing damage to components on the control circuit board 300, but also the power supply 400 and the control circuit board 300 will generate heat when working. Setting the two in different and independent cavities can further enhance the heat dissipation effect of the handheld fan.

[0121] Please refer to Figure 24. More specifically, the fan body 100 includes: a rotating motor 120, fan blades 130, a front cover 140, a rear cover 150 and a casing 160. The stator of the rotating motor 120 (not shown in the drawings) is fixedly assembled with the front cover 140. The rotor of the rotating motor 120 is fixedly assembled with the fan blades 130. The front cover 140 is detachably assembled with the inner side wall of the casing 160 through a snap-fit ​​structure. The rear cover 150 is also detachably assembled with the inner side wall of the casing 160 through a snap-fit ​​structure. It is worth noting that the detachable assembly between the front cover 140 and the rear cover 150 and the casing 160 is a prior art and will not be described in detail here.

[0122] Referring to Figures 25, 26, and 27, in one embodiment, the connector 110 includes a connector 111 and a cover 112. One end of the connector 111 is connected to the housing 160, and the other end extends toward the handheld handle 200. The first mounting cavity 101 is provided on the connector 111. The cover 112 is connected to the connector 111, thereby enclosing the first mounting cavity 101.

[0123] In one embodiment, the connector 111 is integrally formed with the housing 160. In other embodiments, the connector 111 and the housing 160 may be connected by adhesive fixation, screw fixation, snap-fit ​​connection, etc.

[0124] Referring to Figures 25, 26, and 27, in one embodiment, a snap-fit ​​portion 1121 is provided on the side of the cover 112 near the fan body 100, and a snap-fit ​​groove 1122 is provided on the snap-fit ​​portion 1121. A snap-fit ​​joint 1111 is protruding from the inner sidewall of the connector 111 near the fan body 100, and is adapted to fit into the snap-fit ​​groove 1122, thereby achieving a fixed assembly between the cover 112 and the connector 111.

[0125] 25, 26, and 27, in this embodiment, two engaging portions 1121 and two engaging grooves 1122 are provided, and correspondingly, two engaging joints 1111 are also provided. In other embodiments, the engaging grooves 1122 can also be provided on the connecting body 111, and the engaging joints 1111 can be provided on the cover body.

[0126] Referring to Figures 25, 26, and 27, in one embodiment, a plug post 1123 is provided on the side of the cover 112 away from the fan body 100. A corresponding plug interface 1112 is provided on the side of the connector 111 away from the fan body 100. The plug interface 1112 is adapted to the plug post 1123, thereby providing positioning and pre-fixing for the assembly of the cover 112 and the connector 111, and facilitating the snap-fit ​​assembly between the snap-fit ​​groove 1122 and the snap-fit ​​connector 1111.

[0127] Please refer to Figures 25, 26 and 27. In one embodiment, a first long fixing column 1113 is protruding from the bottom of the first installation cavity 101 away from the fan body 100, and the cover body 112 is also fixed to the first long fixing column 1113 on the side away from the fan body 100 by fastening screws.

[0128] It should be noted that when the cover 112 and the connector 111 are assembled, the plug connector 1112 and the plug post 1123 are first plugged in to fix the installation position of the cover 112 and the connector 111; secondly, the cover 112 is moved toward the connector 111 by pressing, and the clamping connector 1111 is engaged with the clamping groove 1112, thereby fixing the side of the cover 112 close to the fan body 100; finally, the cover 112 is assembled by fastening the screws through the threaded holes on the cover 112 and the first long fixing post 1113, thus finally fixing the cover 112 and the connector 111. The cover 112 and the connector 111 arranged in this way can effectively improve the reliability of the assembly between the cover 112 and the connector 111.

[0129] Please refer to Figures 25 to 28. In one embodiment, a second long fixing column 1114 and a third long fixing column 1115 are further provided at the bottom of the first installation cavity 101. The control circuit board 300 includes: a first circuit board 301 and a second circuit board 302.

[0130] Specifically, the second circuit board 302 is located at the bottom of the first mounting cavity 101 and is fixed to the bottom wall of the first mounting cavity 101 by fastening screws. The first circuit board 301 is supported by the second and third long fixing posts 1114, 1115 and is fixedly assembled to the second and third long fixing posts 1114, 1115 by fastening screws (not shown).

[0131] Referring to Figures 25 to 28 , in one embodiment, a positioning protrusion 1116 is provided on the top of the first long fixing post 1113, and a positioning hole 301 is provided on the first circuit board 310 to mate with the positioning protrusion 1116. During assembly of the first circuit board 310, the positioning protrusion 1116 and the positioning hole 301 facilitate positioning, thereby facilitating the assembly of the fastening screws with the second and third long fixing posts 1114, 1115.

[0132] Please refer to Figures 25 to 28. In another embodiment, a first short fixing column 1117 and a second short fixing column 1118 are further provided at the bottom of the first installation cavity 101, and the second circuit board 320 is fixedly assembled with the first short fixing column 1117 and the second short fixing column 1118 by fastening screws (not shown in the drawings).

[0133] Referring to Figures 25 to 28 , in one embodiment, a gear switch 311 is provided on the first circuit board 310. A gear button 1124 is provided on the cover 112, which passes through the cover 112 and is engaged with the gear switch 311. A power switch (not shown) is provided on the second circuit board 320, and a power button 1119 (see Figure 1 ) is provided on the connector 111, which passes through the connector 1111 and is engaged with the power switch.

[0134] Please refer to Figures 22, 23 and 29. In one embodiment, the handheld handle 200 includes: a bottom cover 210, a top cover 220 and a side cover 230. Specifically, the bottom cover 210 is rotatably assembled with the connecting portion 110 on the side close to the fan body 100, and the second mounting cavity 201 is provided on the bottom cover 210. The top cover 220 is detachably assembled with the bottom cover 210 to close the second mounting cavity 201. There are two side covers 230, and both are snap-fitted and assembled with the bottom cover 210. It should be noted that the power supply 400 is installed inside the second mounting cavity 201. The detachable assembly or snap-fit ​​assembly between the bottom cover 210, the top cover 222 and the side cover 230 are all existing technologies in this technical field and are not described in detail in this embodiment.

[0135] Referring to Figures 22, 23, and 29, it should be noted that the handheld handle 200 is rotatably assembled via a rotating member 600 and a fan body 61. The rotating member 600 passes through the handheld handle 200 and the connecting member 111. A mounting ear 610 is provided on the side of the rotating member 600 away from the handheld handle 200. The mounting ear 610 is provided with a rope threading hole 601 through which a hanging rope can be passed and secured.

[0136] Referring to Figures 23, 28, and 29, in one embodiment, an anti-overrotation member 1125 is mounted on the cover 112. A mounting post (not shown) is provided on the side of the anti-overrotation member 1125 near the cover 112. The mounting post penetrates into the cover 112 and forms an interference fit with the cover 112. In this embodiment, the anti-overrotation member 1125 is a rubber member, and the cover 112 is provided with a strip groove 1126 for accommodating the anti-overrotation member 1125. The head of the fastening screw that fastens the cover 112 to the connector 111 is located in the strip groove 1126. The provision of the anti-overrotation member 1125 can cover the fastening screw, thereby ensuring the aesthetic appearance of the fan body 100.

[0137] Option 4

[0138] This embodiment relates to a handheld fan that is small in size, rechargeable, and easy for users to carry around. Referring to FIG30 , the handheld fan comprises a fan body 100 and a handheld handle 200 .

[0139] Specifically, the fan body 100 and the handheld handle 200 are rotatably assembled, allowing the user to independently adjust the air supply direction of the fan body 100. It should be noted that the fan body 100 can rotate clockwise or counterclockwise relative to the handheld handle 200. Please refer to Figure 31. The fan body 100 rotates clockwise relative to the handheld handle 200 so that the user can adjust the air supply angle of the fan body 100 when using it around the neck. Please refer to Figure 32. After the fan body 100 rotates counterclockwise relative to the handheld handle 200, the handheld handle 200 can be used as the base of the fan body 100, so that the handheld fan can be placed on a desktop or other tabletop for use, thereby realizing diversified uses of the handheld fan.

[0140] Please refer to FIG. 33 to FIG. 38 . In one embodiment, the fan body 100 includes an annular casing 110 , a front shroud 120 , a rear shroud 130 , a driving motor 140 and fan blades 150 .

[0141] Specifically, a connecting portion 111 is provided on the side of the annular shell 110 close to the hand-held handle 200, and the connecting portion 111 is rotatably assembled with the hand-held handle 200 via a rotating shaft 300 (see FIG30 ). The rotating shaft 300 is provided with a rope threading hole 310 for threading a neck rope (not shown in the drawings). One end of the front shield 120 is inserted from one end of the annular shell 110 and is detachably assembled with the annular shell 110. The rear shield 130 is inserted from the other end of the annular shell 110 into the gap between the annular shell 110 and the front shield 120, and the rear shield 130 is detachably assembled with the front shield 120 inserted into the part of the annular shell 110. The fixed portion of the drive motor 140 is fixedly assembled with the front shield 120, and the rotating portion is assembled with the fan blades 150, and the fan blades 150 can rotate synchronously with the rotating portion.

[0142] It should be noted that in this embodiment, the neck halter is a prior art. The detachable assembly between the annular housing 110 and the front shield 120 is also a prior art, such as snap assembly, screw fixation, rivet fixation, etc., which will not be described in detail here.

[0143] Referring to Figures 33 to 38 , in one embodiment, the front shield 120 includes an outer frame 121, a central connecting member 122, and a plurality of air deflectors 123. The outer frame 121 is generally annular and assembled with the annular housing 110. The central connecting member 122 is located at the center of the outer frame 121 and is coaxial with the outer frame 121. The plurality of air deflectors 123 each have one end connected to the outer sidewall of the central connecting member 122 and the other end connected to the inner sidewall of the outer frame 121.

[0144] It should be noted that in this embodiment, among the several air guide strips 123, the gap between adjacent air guide strips 123 close to the side of the central connecting member 122 is smaller than the gap between adjacent air guide strips 123 close to the side of the outer frame 121, and the outer frame 121, the central connecting member 122 and the air guide strips 123 are integrally formed.

[0145] Referring to Figures 33 to 38 , in one embodiment, a mounting hole 121a is protruding from the outer wall of the outer frame 121, and an internally threaded post 1211 is embedded in the mounting hole 121a. The rear shield 130, located on the side closest to the front shield 120, is inserted into the gap formed between the front shield 120 and the inner wall of the annular housing 110. A fixing portion 131 is provided on the rear shield 130, corresponding to the internally threaded post 1211, and the fixing portion 131 and the internally threaded post 1211 are connected by fasteners 131.

[0146] Referring to Figures 33 to 39 , in one embodiment, the central connector 122 includes a mounting portion 1221 and a mounting post 1222. Specifically, a mounting groove 122a is provided on the side of the mounting portion 1221 away from the mounting post. A first circuit board 160 is detachably mounted within the mounting groove 122a. A display screen 161 is provided on the side of the first circuit board 160 away from the mounting post. The display screen 161 is used to display the gear position of the handheld fan.

[0147] It should be noted that in this embodiment, the handheld fan has five gears. A first circuit board 160 and a display screen 161 are disposed on the central connector 122, allowing the handheld fan to display gear information when adjusting the gear, thereby facilitating user adjustment of the wind speed. Furthermore, the display screen 161 is disposed on the central connector 122, allowing the display to be displayed in the center of the fan body 100, making it easy for the user to view the specific gear when adjusting the wind speed.

[0148] Referring to Figures 33 to 38 , in one embodiment, a clamping post 122b and a fixing post 122c are protruding from the bottom of the mounting slot 122a. One end of the first circuit board 160 abuts against the clamping post 122b, while the other end of the first circuit board 160 is secured to the fixing post 122c via a fastening screw (not labeled).

[0149] It should be noted that the top of the clamping post 122b has a raised portion 122d that extends toward the first circuit board 160. The first circuit board 160 is clamped into the gap between the raised portion 122d and the bottom of the mounting slot 122a. An arcuate notch 161 is provided on the first circuit board 160. A fastening screw passes through this notch 161 and then screws into the fixing post 122c, thereby securing the other end of the first circuit board 160 (see Figure 39) to the fixing post 122c.

[0150] Continuing with Figures 33 to 38, in one embodiment, a first limiting post 122e, a second limiting post 122f, and a third limiting post 122g are further disposed within the mounting groove 122a. A first limiting notch 162 and a second limiting notch 163 are provided on the first circuit board 160, respectively mate with the first limiting post 122e and the second limiting post 122f. The third limiting post 122g abuts against an edge of the first circuit board 160 adjacent thereto.

[0151] Please refer to Figures 33 to 38. In one embodiment, the handheld fan further includes a transparent plate 170. A clamping portion 171 is provided on the transparent plate 170 near the mounting slot 122a. A clamping slot (not marked in the drawings) is provided on the clamping portion 171. A clamping block 122h is protruding from the inner side wall of the mounting slot 122a, and the clamping block 122h is adapted to the clamping slot.

[0152] In this embodiment, three clamping portions 171 are provided, and the three clamping portions 171 are all integrally formed with the transparent plate 170. Correspondingly, three clamping blocks 122h are provided.

[0153] In one embodiment, a positioning block 122i is protruding from the inner sidewall of the mounting groove 122a, and a positioning groove 172 that mates with the positioning block 122i is provided on the side of the transparent plate 170 near the mounting groove 122a. It is worth noting that when assembling the transparent plate 170 with the mounting portion 1221, the positioning block 122i and the positioning groove 172 are first engaged to position the transparent plate 170 and the mounting portion 1221, so that the positions of the engaging portion 171 and the engaging block 122h are aligned. In this manner, the transparent plate 170 and the mounting portion 1221 can be assembled by simply pressing the transparent plate 170.

[0154] Please refer to Figure 40. In one embodiment, a mounting channel 1201 is provided on the mounting post 1222 along the axial direction (see Figure 38). The fixed part of the drive motor 140 is the stator 141, and the rotating part is the rotor 142. In this embodiment, the stator 141 is fixedly connected to the mounting post 1222. The rotor 142 includes: a rotating shaft 1421 and an annular magnet 1422. The rotating shaft 1421 is fixedly installed in the mounting channel 1201 through a spring ring (not marked in the figure), and the rotating shaft 1421 is fixedly assembled with the fan blade on the side close to the fan blade 150. A cylindrical groove 151 is provided at the central position of the fan blade 150, and the annular magnet 1422 is fixedly installed in the cylindrical groove 151. In this way, when the rotor 142 rotates, it can drive the fan blade 150 to rotate synchronously.

[0155] Referring to Figures 33 to 38 , in another embodiment, since mounting channel 1201 is connected to mounting slot 122a, a dust guard 124 is provided at the bottom of mounting slot 122a. When the handheld fan is in use, dust guard 124 effectively prevents dust from entering mounting slot 122a, thereby effectively extending the service life of drive motor 140.

[0156] Referring to Figure 41 , in one embodiment, a mounting cavity 1101 is provided within the connecting portion 111, and a through-hole 1102 (see Figure 34 ) communicating with the mounting cavity 1101 is provided on the annular housing 110 at a position corresponding to the connecting portion 111. One of the plurality of air guide strips 123 has a wiring groove 1231 provided thereon, connecting the through-hole 1102 with the mounting groove 122a.

[0157] Referring to Figures 34 and 41 , in this embodiment, the second circuit board 300 of the handheld fan is disposed within the mounting cavity 1101. A circuit portion 1411 is disposed on the stator 141 of the drive motor 140, near the central mounting portion 1221. Connecting terminals are provided on the circuit portion 1411. Connecting terminals are also provided on the first circuit board 160, both of which are connected to connecting wires. These connecting wires are electrically connected to the second circuit board 300 through the wiring slots 1231, thereby transmitting gear position display information to the display screen 161 and providing power to the first circuit board 160.

[0158] Please refer to Figures 40 and 42. In one embodiment, the handheld handle 200 includes: a bottom cover 210, a top cover 220, a side cover 230 and a rechargeable battery 240.

[0159] Specifically, the bottom cover 210 is rotatably assembled with the connecting portion 111 on the side close to the fan body 100, and a receiving groove (not marked in the drawings) is provided on the bottom cover 210. The rechargeable battery 240 is installed in the receiving groove 201 and is electrically connected to the second circuit board 300 via a wire (not shown in the drawings). The top cover 220 is detachably assembled with the bottom cover 210 to close the receiving groove. Two side covers 230 are provided, and both are snap-fitted and assembled with the bottom cover 210. It should be noted that the detachable assembly or snap-fit ​​assembly between the bottom cover 210, the top cover 220 and the side cover 230 are all prior arts in this technical field and will not be described in detail in this embodiment.

[0160] In one embodiment, a charging module 250 is provided at the bottom of the handheld handle 200 , and the charging module 250 is used to charge the rechargeable battery 240 .

[0161] Plan 5

[0162] Figures 43 to 45 are schematic diagrams of a portable fan according to the present invention, which is a handheld fan comprising an air outlet 100 and a handheld portion 200. Of course, in other embodiments, the portable fan may comprise only the air outlet 100, or may be a combination of the air outlet 100 and other structures to form other types of fans, such as a desktop fan, a clip fan, or a versatile fan, without limitation to these examples.

[0163] In one embodiment, as shown in Figures 44 to 46, the air outlet portion 100 includes a fan frame assembly, fan blades 4 housed within the fan frame assembly, and a motor 5 housed within the fan blades 4. The fan frame assembly includes an air inlet frame 2, an air outlet frame 1, and a connecting frame 3. The air outlet frame 1 is mounted on the connecting frame 3 from the front, and the air inlet frame 2 is mounted on the connecting frame 3 from the back. The air inlet frame 2 is fixed to the air outlet frame 1, and the connecting frame 3 covers the fixed position of the air inlet frame 2 and the air outlet frame 1. By providing the connecting frame 3 to cover the fixed position of the air inlet frame 2 and the air outlet frame 1, the aesthetics of the air outlet frame 1 is ensured. When the air inlet frame 2 and the air outlet frame 1 are fixed, adding the connecting frame 3 reduces wind noise, improves the safety of the fan frame assembly, and facilitates the disassembly of the air inlet frame 2 and the air outlet frame 1. The fan blades 4 are used to draw air from the air inlet frame 2 and blow it out from the air outlet frame 1. The motor 5 is used to drive the fan blades 4 to rotate.

[0164] In one embodiment, as shown in Figures 44 and 45 , the connection frame 3 includes an annular wall 31, the inner side of which protrudes to form a limit portion 311. The air outlet frame 1 includes a first side wall 11, and the air inlet frame 2 includes a second side wall 21. The first side wall 11 extends rearward beyond the limit portion 311, and the second side wall 21 is sandwiched between the annular wall 31 and the first side wall 11, with the front end of the second side wall 21 located behind the limit portion 311.

[0165] In one embodiment, as shown in Figures 44, 46, and 47, a plurality of guide ribs 312 are formed on the inner side of the annular wall 31, protruding forward of the stopper 311. A snap portion 313 is formed forward of the stopper 311. Correspondingly, mating strips 111 and snap blocks 112 are projecting from the outer side of the first side wall 11. The mating strips 111 slide into the grooves between two adjacent guide ribs 312, and the snap blocks 112 snap into place with the snap portions 313 to secure the air outlet frame 1 to the connection frame 3. In this embodiment, there are four guide ribs 312 and two mating strips 111. These two mating strips 111 slide into the grooves between two sets of guide ribs 312, providing both guidance and a foolproof function, facilitating assembly. There are four snap portions 313 and four snap blocks 112, respectively. It should be understood that the number of the guide ribs 312 , the matching strips 111 , the buckling portions 313 , and the locking blocks 112 is not limited thereto.

[0166] In one embodiment, as shown in Figures 44 and 49, a chute 113 is formed on the outer side of the first side wall 11. The chute 113 is located at the portion of the first side wall 11 that exceeds the limiting portion 311. A positioning block 114 is provided in the chute 113. A fixing block 211 is provided on the inner side of the second side wall 21. The fixing block 211 is recessed in the middle. The fixing block 211 slides into the chute 113. The recess of the fixing block 211 engages the positioning block 114, thereby fixing the air inlet cover to the air outlet cover. It should be understood that the number of the chute 113 and the fixing block 211 can be set according to actual needs, as long as the chute 113 and the fixing block 211 have a one-to-one correspondence.

[0167] In one embodiment, as shown in Figures 44, 47, and 49, the stopper 311 has a notch 315. A first fixing portion 115 protrudes from the outer side of the first sidewall 11 and passes through the notch 315. A second fixing portion 212 is formed at the rear end of the second sidewall 21. Fasteners secure the second fixing portion 212 and the first fixing portion 115 to further secure the air inlet frame 2 and the air outlet frame 1. In this embodiment, the slide groove 113 extends obliquely from the rear end of the first sidewall 11. The second sidewall 21 rotates radially to allow the fixing block 211 to slide into the slide groove 113. The second sidewall 21 has a clearance opening 213. As the fixing block 211 slides into the slide groove 113, the clearance opening 213 clears the first fixing portion 115. Alternatively, the slide groove 113 may extend axially from the rear end of the first sidewall 11. The second sidewall 21 moves axially forward to allow the fixing block 211 to slide into the slide groove 113. In this embodiment, there is one first fixing portion 115 and one second fixing portion 212 . The number of the first fixing portion 115 and the second fixing portion 212 can be set according to actual needs.

[0168] In one embodiment, as shown in Figures 44 and 45 , the air outlet frame 1 further includes a first joint 12 and a plurality of first guide vanes 13 connecting the first joint 12 and the first sidewall 11. The spaces between the plurality of first guide vanes 13 form air outlets. Viewed from front to back, the plurality of first guide vanes 13 curve and rotate clockwise. The air inlet frame 2 further includes a second joint 22 and a plurality of second guide vanes 23 connecting the second joint 22 and the second sidewall 21. The spaces between the plurality of second guide vanes 23 form air inlets. Viewed from front to back, the plurality of second guide vanes 23 curve and rotate clockwise. The plurality of first guide vanes 13 and the plurality of second guide vanes 23 are arranged to curve and rotate in the same direction, which helps reduce forward airflow resistance and improve wind efficiency. The first joint 12 and the plurality of first guide vanes 13 do not protrude forward from the front end of the first sidewall 11, improving the air outlet efficiency of the air outlet frame 1 at the front end. The second joint 22 and the plurality of second guide vanes 23 protrude rearward from the rear end of the second sidewall 21, improving the wind gathering efficiency of the air inlet frame 2 at the rear end. Furthermore, the second joint portion 22 and the plurality of second guide vanes 23 protrude rearward from the rear end of the second side wall 21 , thereby increasing the air intake space and the air intake volume.

[0169] In one embodiment, as shown in Figures 44 and 45, the first coupling portion 12 includes a base plate 121 and a shaft cylinder 122 extending backward from the base plate 121, and the shaft cylinder 122 is hollow. The first coupling portion 12 accommodates a display panel 123 in front of the base plate 121, and the display panel 123 is used to display the working status. When in use, the display panel 123 can be used to display one or more of the power level, current wind speed and charging status. A display cover 124 is also provided, and the display cover 124 is covered in front of the first coupling portion 12. The front surface of the display cover 124 is a concave surface that is recessed backward, which has a flow-gathering effect and is beneficial for protecting the display panel 123. The display cover 124 can be transparent, or opaque but light-transmitting, as long as the content on the display panel 123 can be accessible to the user through the display cover 124.

[0170] In one embodiment, as shown in Figures 44 and 45 , the distance between the front and rear ends of the annular wall 31 is 27.95-28.15 mm, the distance between the front and rear ends of the first side wall 11 is 29.73-29.93 mm, and the distance between the front and rear ends of the second side wall 21 is 10.82-11.02 mm. The distance between the front and rear ends of the first side wall 11 is longer than the distance between the front and rear ends of the annular wall 31, facilitating the securement of the first side wall 11 and the second side wall 21 within the annular wall 31. The distance between the front and rear ends of the first guide vanes 13 is 6.87-7.27 mm. The first guide vanes 13 do not protrude forward and have a long axial distance, resulting in a good air outlet. The distance between the front and rear ends of the second guide vanes 23 is 7.91-10.49 mm. The second guide vanes 23 protrude rearward, have a large axial span, and provide a good air intake. The annular wall 31 remains constant in radial direction from back to front, the inner diameter of the annular wall 31 is 78.80-79.04 mm, the outer diameter of the annular wall 31 is 83.6-83.8 mm, and the annular wall 31 has a large radial space, which can ensure the internal air duct space to provide a large air volume.

[0171] In one embodiment, as shown in Figures 44 and 45, the first sidewall 11 has a minimum diameter, a first section that curves and extends radially forward from the minimum diameter, and a second section that curves and extends radially backward from the minimum diameter. The axial length of the first section is less than the axial length of the second section, and the maximum diameter of the first section is greater than the maximum diameter of the second section. The first sidewall 11 curves and extends as a whole, first radially decreasing from back to front and then radially increasing, which facilitates pressurizing and directing the airflow. The maximum diameter of the first section is 83.31-83.51 mm, which is between the inner and outer diameters of the annular wall 31. The front end of the first section curves upward and abuts the front end of the annular wall 31. The maximum diameter of the second sidewall 21 is located at the rear end of the second sidewall 21. The inner side surface of the rear end of the second sidewall 21 connects with the curved inner side surface of the rear end of the first sidewall 11, which facilitates air suction and flow concentration, increasing air volume and wind efficiency. The maximum diameter of the second side wall 21 is 80.23-80.43 mm, which is between the inner diameter and the outer diameter of the annular wall 31 . The rear end of the second side wall 21 bends upward and presses forward against the rear end of the annular wall 31 .

[0172] In one embodiment, as shown in Figures 44 and 45, the fan blade 4 includes a hub 41 and a plurality of blades 42 arranged around the outside of the hub 41. The second joint portion 22 is radially enlarged from the back to the front, which is conducive to suction and flow convergence. The maximum diameter of the second joint portion 22 is smaller than the maximum diameter of the hub 41, which increases the area of ​​the air inlet and increases the amount of air entering. The first joint portion 12 first radially increases and then radially decreases from the back to the front, which is conducive to first pressurizing and then guiding the wind. The maximum diameter of the first joint portion 12 is smaller than the maximum diameter of the hub 41, which increases the area of ​​the air outlet and reduces the wind resistance. The distance between the second joint portion 22 and the blade 42 is 9.84-10.04mm, which is conducive to suction and flow convergence and increases the amount of air entering; the distance between the first joint portion 12 and the front end of the blade 42 is 2.31-2.51mm, which is conducive to rapid wind guidance and improved wind efficiency.

[0173] In one embodiment, as shown in Figures 44, 45, 50, and 51, the hub 41 includes a connected rear portion 411 and side portions 412, wherein the rear portion 411 and the side portions 412 form a forward-opening receiving portion (not numbered, the same below) for accommodating the motor 5. A plurality of blades 42 are arranged equidistantly around the outside of the side portion 412. The fan 4 also includes a rotating shaft 43, which is integrally formed with the hub 41. The rotating shaft 43 is fixed to the center of the rear portion 411 and is located in the receiving portion. The front end of the rotating shaft 43 is inserted into the shaft cylinder 122 to secure the motor 5 and the fan 4 to the air outlet frame 1. At least one of the hub 41 and the blade 42 is made of glass fiber. The addition of glass fiber material enhances overall strength, rigidity, dimensional stability, fatigue resistance, and resistance to high and low temperature changes, making the fan 4 lighter, stronger, and more ductile. In addition, glass fiber has a good dust isolation effect, and the fan blades 4 can maintain a high degree of cleanliness.

[0174] In one embodiment, as shown in Figures 50 and 51, the hub 41 and the blades 42 are formed by integral injection molding, and the materials of the hub 41 and the blades 42 both contain glass fiber, and the content of the glass fiber accounts for 28%-32%. Because the size of the blades 4 of the portable fan is much smaller than that of the blades 4 of a large fan, during the injection molding process, ABS, a material with good fluidity, is generally used to ensure filling, and by adding 28%-32% of glass fiber, the blades 4 can still maintain good strength, rigidity and structural stability during high-speed operation or long-term use. Of course, in other embodiments, the blades 42 can be made of other materials with added glass fiber, and this is not a limitation.

[0175] In one embodiment, as shown in Figures 45, 50, and 51, the rear portion 411 includes an end portion and an inclined portion. The end portion is recessed from the rear to the front, and the center of the end portion protrudes forward to form a shaft sleeve 413. The shaft sleeve 413 is used to fix the rotating shaft 43. The rotating shaft 43 is not exposed rearward at the end portion, which makes the fan blade 4 more aesthetically pleasing and improves the structural stability of the rotating shaft 43. The inclined portion connects the end portion and the side portion 412, and the inclined portion radially expands and extends from the rear to the front, which is conducive to pressure increase and flow diversion.

[0176] In one embodiment, as shown in Figures 45, 50, and 51, the fan blade 4 further includes a plurality of reinforcing ribs 414, which are equidistantly arranged around the rear portion 411. Each reinforcing rib 414 extends from the central sleeve 413 to the inclined portion. The reinforcing ribs 414 enhance the overall strength of the hub 41. The reinforcing ribs 414 include a stepped portion provided on the inclined portion near the side portion 412. The stepped portion is used to limit and support the magnetic ring of the motor 5. By providing the stepped portion of the reinforcing ribs 414, the magnetic ring of the motor 5 and the rear portion 411 are limited and isolated, vibration is reduced, noise is reduced, and heat dissipation of the motor 5 is facilitated.

[0177] In one embodiment, as shown in Figures 45, 50, and 51, the distance between the front end of the side portion 412 and the rear end of the rear portion 411 is 19.92-21.12 mm, and the distance between the front end of the rotating shaft 43 and the rear portion 411 is 23.02-23.22 mm. The rotating shaft 43 extends forward beyond the front end of the side portion 412, facilitating forward fixation of the rotating shaft 43 to the shaft barrel 122. The outer diameter of the side portion 412 is 33.04-33.24 mm, and together with the first side wall 11, forms a portion of the air duct with a larger cross-sectional area.

[0178] In one embodiment, as shown in Figures 45, 50, and 51, the number of blades 42 is 12. The blades 42 are radially shaped, which provides the strongest wind suction capability. Each blade 42 includes a root portion 421 connected to the hub 41, a tail portion 422 distal from the hub 41, and a first wing 423 and a second wing 424 connecting the root portion 421 and the tail portion 422. The first wing 423 is located forward in the direction of rotation, while the second wing 424 is located rearward in the direction of rotation. Axially, the first wing 423 is located behind the second wing 424. The thickness of the first wing 423 is greater than that of the second wing 424. The first wing 423 cuts the wind, while the second wing 424 guides the wind. This blade 42 structure improves wind efficiency. The number of blades 42 is not limited to this and may be other numbers.

[0179] In one embodiment, as shown in Figures 44, 50 and 51, the insertion surface between two adjacent blades 42 is 1°. The fan blade 4 is usually made by injection molding after the upper mold and the lower mold are parallel to each other. The hub 41 has two points A and B. Point A is near the connection between the blade root 421 and the second wing 424, and point B is near the connection between the blade root 421 and the wing in front of the rotation direction. Among the adjacent blades 42, the surface where the line connecting the A end of one blade 42 and the B end of the other blade 42 that is closer is the insertion surface. The angle between the projection of the insertion surface on the side 412 and the axis is 1°, which is convenient for parallel insertion between the upper and lower molds and ensures the suction effect of the fan blade 4. In the axial direction, the diameter of the projection of the blade tail 422 is 67.90-68.10mm. The blade 42 has a large radial coverage range and a good suction and flow effect, which is conducive to improving the air volume and wind efficiency. The inner diameter of the annular wall 31 is 78.80-79.04 mm, and most of the first side wall 11 is arranged on the inner side of the annular wall 31. That is, the distance between the blade tail 422 and the first side wall 11 is small, which is conducive to wind suction and pressurization, and enhances wind pressure and wind effect.

[0180] In one embodiment, as shown in Figures 44, 50, and 51, the acute angle between the cross-section of the blade 42 and the axis gradually increases along the direction from the blade root 421 to the blade tail 422. The second side wing 424 gradually moves backward, and the first side wing 423 gradually moves forward. The blade 42 is twisted to enhance the wind suction effect. The forward amplitude of the first side wing 423 is smaller than the backward amplitude of the second side wing 424. That is, in the radial direction, the distance between the second side wing 424 and the first guide vane 13 is significantly increased, and the distance between the first side wing 423 and the second guide vane 23 is slightly increased. The fan blade 4 has a good wind suction and flow diversion effect.

[0181] In one embodiment, as shown in Figures 43 to 45 and 49, the air outlet 100 further includes a first connector 6 connected to the outer side of the annular wall 31, and a control center 7 is disposed within the first connector 6. The handheld portion 200 includes a housing 8 and a power supply 201 disposed within the housing 8, and the power supply 201 is electrically connected to the control center 7. The handheld portion 200 is correspondingly provided with a second connector 9, and the first connector 6 and the second connector 9 are connected and fixed. The first connector 6 and the fan frame assembly are provided with a wire passing structure. Specifically, the annular wall 31 is provided with a slot 314 corresponding to the first connector 6, the first side wall 11 is formed with a through hole 116, and one of the first guide vanes 13 is formed with a wire passing slot 131. The fan blades 4 and the motor 5 are fixed to the air outlet frame 1, and wires pass through the first connector 6, the second connector 9, the slot 314, the through hole 116, and the wire passing slot 131 to electrically connect the control center 7 and the motor 5. A cover may also be provided. After the wire passes through the through hole 116 and enters the wire groove 131 , the cover covers the through hole 116 . On the one hand, this reduces the exposed area of ​​the wire, and on the other hand, it can press the wire so that the wire will not be easily displaced in the wire groove 131 .

[0182] In one embodiment, as shown in Figures 44 to 46, the first connecting member 6 is arranged on the outside of the annular wall 31, and the first connecting member 6 does not block the air inlet and the air outlet, so the first connecting member 6 will not affect the air inlet and air outlet of the portable fan.

[0183] In one embodiment, as shown in Figures 44, 47, 48, and 52, the housing 8 includes a front cover 81, a rear cover 82, a left cover 83, a right cover 84, and a top cover 86. The left cover 83 and the right cover 84 are symmetrically arranged, and the left cover 83 and the right cover 84 are higher than the front cover 81, the rear cover 82, and the top cover 86. The first connecting member 6 includes two first connecting holes 61 symmetrically arranged. The second connecting member 9 is provided on the left cover 83 and the right cover 84. The second connecting member 9 includes two second connecting holes 91 symmetrically arranged. The two second connecting holes 91 correspond to the two first connecting holes 61.

[0184] In one embodiment, as shown in Figures 44, 47, 48, and 52, the diameter of the first connection hole 61 is smaller than that of the second connection hole 91. The first connector 6 further includes an outwardly protruding flange 62 located radially outward of the first connection hole 61. The diameter of the flange 62 matches the diameter of the second connection hole 91 and is secured to the second connection hole 91, providing a pivotal connection between the first and second connection holes 61. The second connector 9 further includes a clamp 92 comprising a mating portion 921, two hooks 925 protruding from one side of the mating portion 921, and an ear 926 protruding from the other side of the mating portion 921. A gap is formed between the two hooks 925, allowing space for inward compression and deformation. The two hooks 925 extend inward from the second connection hole 91 into the first connection hole 61 and engage the inner edge of the first connection hole 61.

[0185] In one embodiment, as shown in Figures 44, 46, 47, 48, and 52, the mating portion 921 is provided with an insertion hole 922 and an anti-mash slot 923 on one side of the ear portion 926, and a notch 924 on the other side of the ear portion 926. The left cover 83 includes a left inner cover 831 and a left outer cover 832, and the right cover 84 includes a right inner cover 841 and a right outer cover 842. The second connecting hole 91 is provided in the left inner cover 831 and the right inner cover 841. Both the left inner cover 831 and the right inner cover 841 are provided with an anti-mash block 851, which is located radially outward of the second connecting hole 91. The anti-mash hole and the anti-mash block 851 cooperate to properly install the clamp 92. The second connecting member 9 also includes a gasket 93, which is located radially outward of the two hooks 925. The first connecting member 6 further includes an inwardly recessed recess 63 located between the first connecting hole 61 and the flange 62 . The recess 63 accommodates the cushion 93 , and the cushion 93 is clamped between the matching portion 921 and the first connecting hole 61 .

[0186] In one embodiment, as shown in Figures 44, 48 and 52, one of the left inner cover 831 and the right inner cover 841 is provided with a wire hole 852 corresponding to the power supply 201. The wire passes through the wire hole 852, then enters the first connector 6 through the notch 924 and the first connection hole 61 to electrically connect the control center 7 and the power supply 201. A charging component 202 is also provided in the handheld part 200, and the other of the left inner cover 831 and the right inner cover 841 is also provided with a wire hole 852 corresponding to the charging component 202. The wire passes through the wire hole 852, then enters the first connector 6 through the notch 924 and the first connection hole 61 to electrically connect the control center 7 and the charging component 202. The pad 93 and the notch 924 cooperate to fix the wire. It should be understood that the charging component 202 is electrically connected to the control center 7, the power supply component 201 is electrically connected to the control center 7, and the charging component 202 and the power supply component 201 can also be electrically connected. When the charging component 202 is connected to an external power source, the charging component 202 can charge the power supply component 201, and the charging component 202 can also directly provide power to drive the motor 5 to rotate.

[0187] In one embodiment, as shown in Figures 44 and 52, the left outer cover 832 and the right outer cover 842 are both provided with an inwardly protruding arcuate portion 853 and an insert block 854 that protrudes inwardly from the arcuate portion 853. The arcuate portion 853 is provided with an avoidance groove 855, and the ear portion 926 passes through the avoidance groove 855 and is exposed outward. In this embodiment, the through hole 116 formed by the material of the ear portion 926 can be used to thread a rope so that the user can wear and carry it. The insert block 854 is inserted into the socket 922 and limits the cushion 93. The insert block 854 limits the socket 922 and further fixes the cushion 93, so that even if the portable fan falls or hits, it is not easy to shift. The left outer cover 832 and the right outer cover 842 cover the wiring of the wires, which is safer, more reliable and more beautiful.

[0188] In one embodiment, as shown in Figure 45, the control center 7 includes a first control panel 71 and a second control panel 72 stacked in front and back, the first control panel 71 and the second control panel 72 are electrically connected, the first control panel 71 is used for anti-mistouch control, and the second control panel 72 is used to control switches and wind speed.

[0189] In one embodiment, as shown in Figures 45 and 52, the front cover 81 is higher than the rear cover 82, and the top cover 86 includes a first slope 861 and a second slope 862. The first slope 861 extends forward and diagonally upward from the rear cover 82, while the second slope 862 extends forward and diagonally upward from the first slope 861. The second slope 862 is concavely curved downward. The concave curve just avoids the first connector 6, so that the first connector 6 and the second connector 9 do not contact each other during pivoting.

[0190] Furthermore, as shown in Figures 53 and 54 , the air outlet 100 can be rotated backward relative to the handheld portion 200 until the annular wall 31 abuts the left cover 83 and the right cover 84. At this point, the angle between the air outlet 100 and the handheld portion 200 is 78°. Furthermore, the front cover 81 of the handheld portion 200 can now be placed flat on a tabletop, allowing the portable fan to function as a small desktop fan. The air outlet 100 can also be rotated forward relative to the handheld portion 200 until the first connector 6 abuts the front cover 81. At this point, the angle between the air outlet 100 and the handheld portion 200 is 140°. Furthermore, the rear cover 82 of the handheld portion 200 can now be placed flat on a tabletop, allowing the portable fan to function as a small desktop fan. The pivotal connection between the air outlet 100 and the handheld portion 200 allows for adjustment of the air outlet angle, providing greater flexibility and versatility.

[0191] Plan 6

[0192] Example 1

[0193] Please refer to Figures 55 and 56. Figure 55 is a schematic diagram of the three-dimensional structure of the fan blades of this embodiment; Figure 56 is a schematic diagram of the structure of the fan blades of this embodiment from a first perspective.

[0194] As shown in Figures 55 and 56 , a fan blade 1 comprises a hub 11 and a plurality of blades 12. The hub 11 is configured with an annular sidewall 111; the plurality of blades 12 are distributed circumferentially around the annular sidewall 111 of the hub 11 and extend radially along the radial direction of the annular sidewall 111; each of the plurality of blades 12 is perpendicular to at least one side edge of the fan blade 1 in the air inlet direction C2 and is configured to form a shear surface 121, which extends in a direction opposite to the rotational direction C1 of the fan blade 1.

[0195] The end surface 112 of the hub 11 in this embodiment can be configured in a shape (not limited to): a circular plane, a hemispherical surface, a conical surface, or a truncated cone. The end surface 112 and the annular side wall 111 are connected to form a complete hub 11.

[0196] In this embodiment, the number of fan blades 12 is 12. However, the number of blades 12 is not limited thereto. Depending on the specific application scenario, in some embodiments, the number of blades 12 can be (but not limited to): 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, or more.

[0197] In this embodiment, the blade 12 has two sides perpendicular to the air inlet direction C2 of the fan blade 1, which are respectively distributed on the air inlet side and the air outlet side of the fan blade 1. The wind-cutting surface 121 is distributed on the side of the blade 12 on the air inlet side. However, the distribution of the wind-cutting surface 121 is not limited to this. Depending on the specific application scenario, in some embodiments, the wind-cutting surface 121 is set on the side of the blade 12 on the air outlet side; in some embodiments, the wind-cutting surface 121 is distributed on the side of the blade 12 on the air inlet side and on the side of the blade 12 on the air outlet side.

[0198] In this embodiment, extension in the opposite direction means that: the wind-cutting surface 121 extends along one side of the blade 12 to the opposite side, until the corner on one side in the extension direction is tilted; or, the wind-cutting surface 121 extends along one side of the blade 12 to the opposite side, until the corner on one side in the opposite direction of the extension direction is tilted.

[0199] In the above embodiment, at least one side of the fan blade 1 perpendicular to the air inlet direction C2 is configured as a shear surface 121, and the shear surface 121 extends in the opposite direction of the rotation direction C1 of the fan blade 1. The end of the shear surface 121 is sharper, which enables the fan blade 1 to better cut the airflow when the fan blade 1 rotates, reducing the resistance of the fan blade 1 during the rotation process, and making the rotation efficiency of the fan blade 1 higher. At the same time, because the shear surface 121 extends in the opposite direction of the rotation direction C1 of the fan blade 1, the blade 12 can better guide the airflow flowing through the surface of the fan blade 1, so that the airflow is separated from the blade 12 of the fan blade 1 at a larger angle, thereby reducing the noise generated by the side and the airflow. And because it extends in the opposite direction to the rotation direction C1 of the fan blade 1, when the cutting surface 121 is located on the air inlet side of the fan blade 1, the airflow can be guided to the inside of the fan blade 1, thereby improving the air intake efficiency of the fan blade 1; when the cutting surface 121 is located on the air outlet side of the fan blade 1, it can avoid the airflow flowing out of the fan blade 1 from being guided toward the inside of the fan blade 1, thereby avoiding convection between the outflowing airflow and the airflow inside the fan blade 1, thereby greatly improving the air outlet efficiency of the fan blade 1.

[0200] In some embodiments, each blade 12 includes: a first shear surface 121a and a second shear surface 121b. Each blade 12 has two sides perpendicular to the air inlet direction C2 of the fan blade 1, and is respectively configured as the first shear surface 121a and the second shear surface 121b. The first shear surface 121a and the second shear surface 121b extend in the opposite direction of the rotation direction C1 of the fan blade 1. In this embodiment, two shear surfaces 121 are provided, namely the first shear surface 121a and the second shear surface 121b. The first shear surface 121a is provided on the side of the blade 12 on the air inlet side, and the second shear surface 121b is provided on the side of the blade 12 on the air outlet side.

[0201] A first cutting surface 121a and a second cutting surface 121b are provided. The end of the first cutting surface 121a is sharper, and when the fan blade 1 rotates, the fan blade 1 can better cut the airflow, reduce the resistance of the fan blade 1 during the rotation process, make the rotation efficiency of the fan blade 1 higher, and can guide the airflow to the inside of the fan blade 1, thereby improving the air intake efficiency of the fan blade 1. The second cutting surface 121b enables the blade 12 to have a better guiding effect on the airflow flowing through the surface of the fan blade 1, so that the airflow is separated from the blade 12 of the fan blade 1 at a larger angle when it separates from the blade 12 of the fan blade 1, reducing the noise generated by the side and the airflow, and avoiding the airflow flowing out of the fan blade 1 from being guided to the inside of the fan blade 1, thereby avoiding convection between the outflowing airflow and the airflow inside the fan blade 1, and greatly improving the air outlet efficiency of the fan blade 1. At the same time, since the first cutting wind surface 121a and the second cutting wind surface 121b both extend in the opposite direction of the rotation direction C1 of the fan blade 1, the blade 12 can have a better guiding effect on the airflow flowing through the surface of the fan blade 1, so that the airflow can separate from the blade 12 of the fan blade 1 at a larger angle when it separates from the blade 12, thereby reducing the noise generated by the side and the airflow.

[0202] Please refer to Figure 57, which is a structural diagram of the fan blades of this embodiment from a second perspective.

[0203] As shown in FIG57 , in some embodiments, the first wind-cutting surface 121a includes a first curved portion 121c and a second curved portion 121d, with the first curved portion 121c and the second curved portion 121d having opposite curvatures. The arrangement of the first curved portion 121c and the second curved portion 121d ensures that, when the fan blade 1 rotates, only a portion of the first wind-cutting surface 121a initially contacts the airflow being cut, and then drives more of the first wind-cutting surface 121a to cut the air, further reducing airflow resistance. At the same time, cutting the air with low resistance reduces noise generated during wind cutting. The arrangement of the first curved portion 121c and the second curved portion 121d having opposite curvatures allows the area of ​​the wind-cutting surface 121a of the first curved portion 121c to gradually increase while the area of ​​the wind-cutting surface of the second curved portion 121d to gradually decrease, or vice versa. This structure can keep the area of ​​the first cutting surface 121a consistent when cutting the wind, avoiding the vibration of the blade 12 in the changing resistance due to the rapid change of the cutting area, and further reducing the rotational resistance and noise of the fan blade 1.

[0204] In some embodiments, one end of the first curved portion 121c is connected to the annular sidewall 111, and the other end of the first curved portion 121c is connected to the second curved portion 121d. The connection between the first curved portion 121c and the second curved portion 121d is smoothly transitioned. The smooth transition between the first curved portion 121c and the second curved portion 121d avoids the problem of uneven force on the blade 12 caused by a non-smooth transition, further reducing the wind resistance and noise of the fan blade 1.

[0205] However, the positional relationship between the first curved portion 121c and the second curved portion 121d is not limited to this. Depending on the specific application scenario, in some embodiments, one end of the second curved portion 121d is connected to the annular side wall 111, while the other end of the second curved portion 121d is connected to the first curved portion 121c. The other end of the first curved portion 121c is suspended in the air.

[0206] In some embodiments, the first curved portion 121c bulges outward to form an outer arc, and the second curved portion 121d is recessed inward to form an inner arc. Considering the relative positional relationship between the first curved portion 121c and the second curved portion 121d, although the two have the same angular velocity when rotating on the first wind-cutting surface 121a, the linear velocity of the second curved portion 121d is greater than that of the first curved portion 121c. The second curved portion 121d adopts an inwardly concave arc, so that its initial contact surface with the airflow is much smaller than the contact area of ​​the first curved portion 121c. This allows the blade 12 to first cut the airflow with the first curved portion 121c. Since the linear velocity of the first curved portion 121c is lower, cutting is relatively easier and the resulting wind-cutting sound is quieter.

[0207] In some embodiments, the width of the second tangential wind surface 121b gradually increases along the radial extension direction of each blade 12. The area of ​​the second tangential wind surface 121b along the direction in which the blade 12 extends outward becomes wider and wider. Since the linear velocity of the first tangential wind surface 121a along the direction in which it extends becomes faster and faster during the rotation of the fan blade 1, the area of ​​the second tangential wind surface 121b corresponding to the position with the greater linear velocity is larger. This structure enables the second tangential wind surface 121b to have a wider guiding area for the outflowing airflow at a position where the wind speed flows faster. Since, when the airflow speed is faster, the guiding efficiency of the unit area guiding structure for the airflow is lower, the structure in which the second tangential wind surface 121b gradually widens can balance the guiding effect of the airflow at different linear velocities during the rotation process, so that the airflow outlet direction of the airflow outflowing from different positions of the fan blade 1 remains consistent. While improving the air outlet efficiency of the fan blade 1, it can also reduce the airflow collision noise caused by inconsistent airflow directions.

[0208] In some embodiments, each blade 12 includes: a windward surface 124 and a leeward surface 125, the windward surface 124 and the leeward surface 125 are staggered with each other in the air inlet direction C2 of the fan blade 1, the first tangential surface 121a and the second tangential surface 121b are respectively connected to the windward surface 124 and the leeward surface 125, and the first tangential surface 121a and the second tangential surface 121b are both inclined planes.

[0209] The windward surface 124 refers to the surface of the blade 12 that comes into contact with the airflow head-on during the rotation of the fan blade 1, while the leeward surface 125 is the surface opposite to the windward surface 124. The windward surface 124 and the leeward surface 125 are displaced from each other, so that there is a position difference between the windward surface 124 and the leeward surface 125. This position difference causes the first wind-cutting surface 121a and the second wind-cutting surface 121b to have an inclined trend, and ultimately causes the first wind-cutting surface 121a and the second wind-cutting surface 121b to form an inclined plane. The inclined plane formed by the first wind-cutting surface 121a can make the first wind-cutting surface 121a sharper when cutting the wind, and can cut the wind better. At the same time, the inclined surface can have a better guiding effect on the airflow entering the fan blade 1, making the wind-guiding ability of the first wind-cutting surface 121a stronger. The inclined plane constructed by the second wind-cutting surface 121b can make it have a larger contact area with the airflow flowing out of the fan blade 1, thereby improving the wind-guiding ability of the second wind-cutting surface 121b.

[0210] In some embodiments, along the wind inlet direction C2 of each blade 12, the height of the leeward surface 125 is greater than the height of the windward surface 124. The height of the leeward surface 125 is greater than the height of the windward surface 124, so that the height of the leeward surface 125 on the wind outlet side of the fan blade 1 is greater than the height of the windward surface 124 on that side, and the height of the leeward surface 125 on the wind inlet side of the fan blade 1 is also higher than the height of the windward surface 124 on that side. This structure allows the first tangential surface 121a to extend upward when extending from the windward surface 124 to the leeward surface 125. This structure enables the first tangential surface 121a to guide the airflow toward the inside of the fan blade 1 when guiding the airflow, thereby improving the air intake efficiency of the fan blade 1. Similarly, on the wind outlet side of the fan blade 1, the height of the leeward surface 125 is still greater than the windward surface 124. This structure allows the second tangential surface 121b to also extend upward. The upward extending structure enables the second wind cutting surface 121b to guide the airflow out of the fan blade 1 in an oblique upward direction, thereby reducing the lateral rotational kinetic energy of the outflowing airflow and enhancing the kinetic energy along the air outlet direction of the fan blade 1, thereby making the air outlet efficiency of the fan blade 1 higher, and the wind force surface is more concentrated in the air outlet direction, resulting in a better blowing effect.

[0211] Please refer to Figure 58, which is a structural diagram of the cross section of the blade in this embodiment.

[0212] As shown in FIG58 , in some embodiments, the angle θ1 between the leeward surface 125 and the first wind-cutting surface 121a is greater than 90°, and the angle θ2 between the windward surface 124 and the portion of the second wind-cutting surface 121b away from the annular side wall 111 is greater than 90°.

[0213] The angle θ1 between the leeward surface 125 and the first tangential surface 121a is greater than 90°, so that the angle θ1 between the leeward surface 125 and the first tangential surface 121a is an obtuse angle. This structure enables the first tangential surface 121a to guide the airflow from the windward surface 124 to the leeward surface 125 at a more gentle angle, which has a better guiding effect on the airflow and improves the air intake efficiency of the fan blade 1.

[0214] The angle θ2 between the windward surface 124 and the portion of the second wind shearing surface 121b away from the annular side wall 111 is greater than 90 degrees. The angle θ2 between a portion of the second wind shearing surface 121b and the windward surface 124 is an obtuse angle. This structure enables the partial portion of the second wind shearing surface 121b to guide the airflow out of the fan blade 1 more smoothly, reducing noise on the air outlet side of the fan blade 1 and improving the air outlet efficiency of the fan blade 1.

[0215] In some embodiments, each blade 12 includes: a blade tip 122 and a blade tail 123, wherein the blade tip 122 is located at the end of the suspended end of the first wind-cutting surface 121a, and the blade tail 123 is located at the end of the suspended end of the second wind-cutting surface 121b. The cross-section of each blade 12 along the direction from the blade tip 122 to the blade tail 123 is constructed into a fusiform shape. The fusiform structure enables the blade 12 to better cut the air on the air inlet side, and in the process of first changing from small to large and then from large to small, the air inlet channel formed by two adjacent blades 12 can pressurize and release the airflow entering therein, thereby increasing the flow rate of the airflow and making the wind pressure of the fan blade 1 greater. Structurally, the widening of the blade 12 in a local area can make the physical structure of the blade 12 more stable, less likely to vibrate under the action of external forces, and reduce the noise of the fan blade 1.

[0216] In some embodiments, along the direction from the blade tip 122 to the blade tail 123, the radian of the leeward surface 125 in the cross section of each blade 12 is greater than the radian of the windward surface 124. From a positional perspective, the windward surface 124 is located above the leeward surface 125. During the rotation of the fan, due to the radian difference, the airflow velocity flowing through the blade 12 is also different. According to the principles of aerodynamics, this radian difference causes the fan blade 1 to generate lift along the air outlet direction during rotation. The generation of lift can offset the gravity exerted on the fan blade 1, thereby reducing the interaction force between the fan blade 1 and its associated connection structure (not shown), reducing the physical friction during the rotation of the fan blade 1, and making the fan blade 1 rotate more efficiently.

[0217] In some embodiments, each blade 12 extends obliquely along the outer surface of the annular side wall 111. The oblique extension can enable the blade 12 to better cut the air and can also make the airflow flowing through the fan blade 1 flow more smoothly.

[0218] However, the extension of the blade 12 on the outer surface of the annular side wall 111 is not limited to this. Depending on the specific application scenario, in some embodiments, the extension of the blade 12 on the outer surface of the annular side wall 111 can also be (not limited to): vertical extension, spiral extension or curved extension.

[0219] In some embodiments, the hub 11 further includes an end surface 112 connected to one end of the annular sidewall 111. The end surface 112 and the annular sidewall 111 together form the accommodating cavity 13 of the hub 11. The hub 11 having the end surface 112 can prevent airflow from entering the interior of the annular sidewall 111 and forming a vortex as the annular sidewall 111 rotates, thereby affecting the air intake efficiency of the fan blades 1. Therefore, the provision of the end surface 112 can improve the air intake efficiency of the fan blades 1.

[0220] The end face 112 is configured in a truncated cone shape, and the top end of the end face 112 is recessed into the interior of the accommodating cavity 13 to form a circular groove 113. The end face 112 of the hub 11 is configured in a truncated cone shape. Since the top end surface 112 of the truncated cone structure has a large area, it is not easy for an airflow vortex to form at the top end of the cone when the fan blade 1 rotates. The formation of the airflow vortex will form a negative pressure area on the air inlet side of the fan blade 1. This negative pressure area will interfere with the airflow entering the fan blade 1, reducing the air intake efficiency of the fan blade 1. Therefore, configuring the end face 112 in a truncated cone shape can improve the air intake efficiency of the fan blade 1.

[0221] The top of the end surface 112 is recessed inward to form a circular groove 113. The structure of the circular groove 113 can further disrupt the airflow vortex generated at the corresponding position of the top of the hub 11 when the fan blade 1 rotates. At the same time, the structure of the circular groove 113 can be used for glue injection during the manufacturing process of the fan blade 1. The glue injection port formed by the glue injection will be hidden in the circular groove 113 instead of being formed on the surface of the hub 11 or the surface of the blade 12. Therefore, this structure can make the surface of the fan blade 1 smoother, more in line with the principles of aerodynamics, and make the blowing efficiency of the fan blade 1 higher.

[0222] In this embodiment, the end face 112, the annular side wall 111, and the blades 12 are manufactured using an integrated molding process. However, the connection method between the three is not limited to this. Depending on the specific application scenario, in some embodiments, the connection method between the annular side wall 111 and the end face 112, and between the annular side wall 111 and the blades 12, is (but not limited to) hot melt connection, adhesive connection, clamping connection, screw connection, etc.

[0223] In some embodiments, a plurality of leveling grooves 114 are formed on the surface of the annular sidewall 111 facing the accommodating cavity 13. The plurality of leveling grooves 114 are arranged around the annular sidewall 111 at equal intervals. The number of the leveling grooves 114 can be any integer greater than or equal to 2.

[0224] A leveling groove 114 is provided on the inner surface of the annular side wall 111, which rationally utilizes the space resources in the accommodating cavity 13 and prevents the leveling groove 114 from being exposed on the outer surface of the hub 11, thereby improving the smoothness of the outer surface of the hub 11 and making the resistance of the fan blade 1 smaller during rotation, and improving the air outlet efficiency. At the same time, a balancing filler (not shown) placed inside the inner surface of the annular side wall 111 will be supported by the annular side wall 111 when the fan blade 1 rotates, and will not separate from the hub 11 under the action of the centrifugal force generated by the rotation of the fan blade 1. This improves the stability of the rotation of the fan blade 1, avoids damage to the fan blade 1 that may be caused by the falling off of the balancing filler, and improves the safety of the fan blade 1.

[0225] In some embodiments, the plurality of leveling grooves 114 are all in communication with the accommodating cavity 13 , and the plurality of leveling grooves 114 and the motor components assembled in the accommodating cavity 13 together enclose a leveling space.

[0226] The interior of the accommodating chamber 13 is used to install motor accessories, such as the magnetic ring of the fan motor or the magnetic ring and the metal ring mounted on the magnetic ring. The leveling groove 114 is connected to the adjacent side wall in the annular side wall 111, so that the side wall of the leveling groove 114 next to the motor accessory is missing, and since the motor accessory and the inner surface of the annular side wall 111 are usually tightly fitted with an interference fit. Therefore, the motor accessory is used as a supplement to the missing side wall of the leveling groove 114 to complete the leveling groove 114. This structure cleverly utilizes the relative relationship between the accommodating chamber 13 and the motor accessory, simplifies the structure of the leveling groove 114, saves the space loss caused by the setting of the complete leveling groove 114, makes the hub 11 structure more compact and exquisite, and improves the space utilization efficiency of the fan blade 1.

[0227] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination should not be limited to the combination listed in this embodiment.

[0228] Example 2

[0229] A blowing device includes the fan blade 1 in Example 1, and the fan blade 1 serves as a core module component for assembling the blowing device.

[0230] It should be noted that the blowing device in this embodiment includes (but is not limited to): bladeless fans, desktop fans, floor fans, spherical fans, neck fans, handheld fans, industrial fans, air conditioners, hair dryers, and other products that require air circulation. The fan blades 1 in Example 1 are assembled inside the housing of the above products.

[0231] The blowing device in this embodiment configures at least one side of the fan blade 1 perpendicular to the air inlet direction C2 into a cutting surface 121. The cutting surface 121 extends in the opposite direction of the rotation direction C1 of the fan blade 1. The end of the cutting surface 121 is more pointed, which enables the fan blade 1 to better cut the airflow when the fan blade 1 rotates, reducing the resistance of the fan blade 1 during the rotation process and making the rotation efficiency of the fan blade 1 higher. At the same time, because the cutting surface 121 extends in the opposite direction of the rotation direction C1 of the fan blade 1, the blade 12 can better guide the airflow flowing through the surface of the fan blade 1, so that the airflow is separated from the blade 12 of the fan blade 1 at a larger angle, reducing the noise generated by the side and the airflow. And because it extends in the opposite direction to the rotation direction C1 of the fan blade 1, when the cutting surface 121 is located on the air inlet side of the fan blade 1, the airflow can be guided to the inside of the fan blade 1, thereby improving the air intake efficiency of the fan blade 1; when the cutting surface 121 is located on the air outlet side of the fan blade 1, it can avoid the airflow flowing out of the fan blade 1 from being guided toward the inside of the fan blade 1, thereby avoiding convection between the outflowing airflow and the airflow inside the fan blade 1, thereby greatly improving the air outlet efficiency of the fan blade 1.

[0232] The above is only a preferred embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. [Corrected 12.07.2024 as per Rule 26] A fan blade, wherein: include: A hub and a plurality of blades evenly distributed along the circumference of the hub; The blade comprises a blade root and a blade tail, the blade tail is twisted compared to the blade root, and the blade roots of a plurality of the blades are connected to the hub.

2. The fan blade according to claim 1, wherein: The blade also includes a first side and a second side, the thickness of the first side of the blade is greater than the thickness of the second side of the blade; the distance from the first side of the blade root to the second side of the blade root is a first width, and the first width range is greater than or equal to 16.0 mm and less than or equal to 16.5 mm; the distance from the first side of the blade tail to the second side of the blade tail is a second width, and the second width range is greater than or equal to 15.0 mm and less than or equal to 15.5 mm.

3. The fan blade according to claim 2, wherein: The angle between the line connecting the first side of the blade root and the second side of the blade root and the direction of the radial plane of the hub is a first angle, and the range of the first angle is greater than or equal to 25 degrees and less than or equal to 75 degrees; the angle between the line connecting the first side of the blade tail and the second side of the blade tail and the line connecting the first side of the blade root and the second side of the blade root is a second angle, and the range of the second angle is greater than or equal to 5 degrees and less than or equal to 10 degrees.

4. The fan blade according to claim 1, wherein: The number of the blades is 9 to 15.

5. The fan blade according to claim 1, wherein: The wheel hub comprises an annular body and an air guide cone connected to the annular body, and the annular body and the air guide cone are connected to form a cavity.

6. The fan blade according to claim 5, wherein: A circular concave platform is provided at the center of the air guide cone. The concave platform includes a bottom plate and an inner cone wall connected to the bottom plate. The inner cone wall and the annular body are connected via an outer cone wall.

7. The fan blade according to claim 6, wherein: The bottom plate is provided with an annular protrusion on one side facing the cavity, and the diameter of the annular protrusion is smaller than the diameter of the bottom plate.

8. The fan blade according to claim 7, wherein: A plurality of connecting plates are provided on a side of the inner cone wall facing the cavity, and the connecting plates are connected to the outer cone wall.

9. The fan blade according to claim 8, wherein: The connection between the outer cone wall and the inner cone wall and the connection between the inner cone wall and the bottom plate are both arc-shaped chamfers; The width of the connection between the connecting plate and the outer cone wall and the width of the connection between the connecting plate and the outer cone wall are both greater than the center width of the connecting plate, and the connection between the connecting plate and the outer cone wall and the connection between the connecting plate and the inner cone wall are both arc-shaped chamfers.

10. A fan blade, wherein: include: A wheel hub, comprising a rear portion and a side portion connected to each other, wherein the rear portion and the side portion form a receiving portion open forward, and the receiving portion is used to receive the motor; Blades are arranged at equal intervals around the outside of the side portion; A rotating shaft is formed integrally with the wheel hub, the rotating shaft is fixed to the center of the rear portion, and is disposed in the accommodation portion; Wherein, at least one of the hub and the blades is made of glass fiber.

11. The fan blade according to claim 10, wherein: The hub and the blades are formed by integral injection molding, and the materials of the hub and the blades both contain glass fiber, and the content of the glass fiber accounts for 28%-32%.

12. The fan blade according to claim 10, wherein: The rear portion includes an end portion and an inclined portion, wherein the end portion is recessed from the rear to the front, and the center of the end portion protrudes forward to form a sleeve, wherein the sleeve is used to fix the rotating shaft, and the rotating shaft is not exposed rearward at the end portion; the inclined portion connects the end portion and the side portion, and the inclined portion radially expands and extends from the rear to the front.

13. The fan blade according to claim 12, wherein: It also includes a plurality of reinforcing ribs, which are arranged in the rear portion at equal intervals, and each of the reinforcing ribs extends from the central sleeve to the inclined portion.

14. The fan blade according to claim 13, wherein: The reinforcing rib includes a step portion provided at the inclined portion close to the side portion, and the step portion is used to limit and support the magnetic ring of the motor.

15. The fan blade according to claim 10, wherein: The distance between the front end of the side portion and the rear end of the rear portion is 19.92-21.12 mm, the distance between the front end of the shaft and the rear end of the rear portion is 23.02-23.22 mm, and the shaft extends forward beyond the front end of the side portion; the outer diameter of the side portion is 33.04-33.24 mm.

16. The fan blade according to claim 10, wherein: The number of the blades is 12, and the shape of the blades is radial; each of the blades includes a blade root portion connected to the hub, a blade tail portion away from the hub, and a first side wing and a second side wing connecting the blade root portion and the blade tail portion, the first side wing is located on the front side in the rotation direction, and the second side wing is located on the rear side in the rotation direction, in the axial direction, the first side wing is located behind the second side wing, and the thickness of the first side wing is greater than the thickness of the second side wing.

17. The fan blade according to claim 16, wherein: The insertion surface between two adjacent blades is 1°; in the axial direction, the diameter of the projection of the blade tail is 67.90-68.10 mm.

18. The fan blade according to claim 16, wherein: Along the direction from the blade root to the blade tail, the acute angle between the blade cross section and the axis line gradually increases; the second side wing gradually extends backward, the first side wing gradually extends forward, and the forward amplitude of the first side wing is smaller than the backward amplitude of the second side wing.

19. A fan, wherein: include: The fan comprises blades, and the blades comprise: a hub and a plurality of blades evenly distributed along the circumference of the hub; the blades comprise a blade root and a blade tail, the blade tail is twisted compared to the blade root, and the blade roots of the plurality of blades are connected to the hub; and / or, The fan includes blades, which include: a hub, including a rear portion and a side portion connected to each other, the rear portion and the side portion forming a housing portion open to the front, the housing portion being used to accommodate a motor; blades, which are arranged at equal intervals around the outside of the side portion; a rotating shaft, which is integrally formed with the hub, the rotating shaft is fixed to the center of the rear portion and is arranged in the housing portion; wherein the material of at least one of the hub and the blades includes glass fiber.

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