Hand-held fan assembly

Abstract

The application belongs to the technical field of hand-held fan, and particularly relates to a hand-held fan assembly which comprises a wind tube, a mounting seat and a fan blade, the wind tube is internally structured with an air duct extending along the axial direction of the wind tube, the mounting seat is arranged in the air duct and comprises an axle seat extending along the axial direction of the wind tube and a mounting disc structured on the periphery of the axle seat, the fan blade is rotatably coupled with the axle seat, the mounting disc is circumferentially and intervally provided with a plurality of connecting arm members connected with the inner wall of the wind tube, the connecting arm member comprises a coupling end portion coupled with the mounting disc and an arm member main body connecting the coupling end portion and the inner wall of the wind tube, the coupling end portion is arranged to extend along the radial direction of the wind tube, the arm member main body is structured as a plate member extending along the axial direction of the wind tube, and an arc-shaped air guide portion extending in an arc shape towards the fan blade is structured at one end of the coupling end portion, the connecting arm member of the application can smoothly guide the airflow passing through to the working area of the fan blade, improve the uniformity of the airflow, reduce the airflow turbulence, and improve the air outlet effect and stability of the fan.

Description

Technical Field

[0001] This application belongs to the field of portable fan technology, specifically a portable fan assembly. Background Technology

[0002] Existing fan assemblies generally include a fan casing and fan blades. The fan casing has an air duct extending along its axial direction, and a mounting base is fixedly installed inside the air duct. The fan blades are assembled on the mounting plate, and the mounting base is connected to the inner wall of the fan casing through multiple support rods around its periphery. However, the existing support rods are usually designed as vertically extending cylindrical structures, which not only obstructs gas flow but also lacks a gas guiding structure, thus affecting the fan's air output performance. Therefore, it is essential to develop a fan assembly with a mounting base connection structure that guides gas. Summary of the Invention

[0003] The purpose of this application is to overcome the shortcomings of existing support rods used to connect the air duct and the mounting base, which lack a gas guiding structure and thus reduce the air output effect of the fan, and to provide a portable fan assembly with a gas guiding structure in the connecting arm.

[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution: A portable fan assembly includes a fan casing, a mounting base, and fan blades. The fan casing has an internal air duct extending axially therein. The mounting base is disposed within the air duct and includes a bearing extending axially along the fan casing and a mounting plate disposed around the bearing. The fan blades are rotatably coupled to the bearing. The mounting plate is circumferentially spaced with a plurality of connecting arms that connect to the inner wall of the fan casing. Each connecting arm includes a coupling end coupled to the mounting plate and an arm body connecting the coupling end and the inner wall of the fan casing. The coupling end extends radially along the fan casing, and the arm body is constructed as a plate extending parallel to the axial direction of the fan casing. An arc-shaped air guide portion extending towards the fan blades is constructed at one end connected to the coupling end.

[0005] Compared with the prior art, the main body of the arm in this application is designed as a plate extending along the axial direction of the air duct, which reduces the axial obstruction to the airflow. One end of the main body of the arm is connected to the coupling end and is constructed with an arc-shaped air guide extending towards the fan blade. This structure can smoothly guide the passing airflow to the working area of ​​the fan blade, improving the uniformity of the airflow entering the fan blade area. At the same time, the coupling end is arranged to extend in a direction perpendicular to the axial direction of the air duct, effectively guiding the airflow into the fan blade circumferentially. The connecting arm of this application reduces airflow turbulence and improves the air outlet effect and air outlet stability of the fan.

[0006] Furthermore, the coupling end extends from the mounting plate, thereby increasing the contact area with the airflow, improving the circumferential guiding effect of the airflow, and increasing the connection area between the coupling end and the arm body, thereby improving the strength and rigidity of the connecting arm.

[0007] Furthermore, the coupling end is configured to bend toward the center of the duct, thereby effectively guiding the airflow to converge toward the center of the duct.

[0008] Furthermore, the connecting arm is constructed as a metal plate formed by bending the coupling end and the main body of the arm. The integrated structure not only ensures the strength of the connecting arm, but also ensures that there are no obvious breaks in the airflow when it passes through, reducing airflow disturbance and lowering vibration and noise.

[0009] Furthermore, the connecting arm is bent at the end of the arm body away from the mounting plate to form a connecting end, and the connecting end is fixedly connected to the air duct by screws. The connection structure between the connecting arm and the air duct is simple and easy to assemble and disassemble.

[0010] Furthermore, the connection between the coupling end and the main body of the arm is an arc transition, which allows for a smooth airflow transition.

[0011] Furthermore, the extension line of the main body of the arm is offset from the axis of the air duct by a predetermined distance, and the angle between the line connecting the ends of two adjacent main bodies of the arm and the center of the air duct under axial projection is the same. The above arrangement makes the main bodies of the arm form an asymmetrical distribution, which can make the airflow form a spiral flow when passing through the main body of the arm, enhance the stability and uniformity of the air outlet, and reduce local airflow turbulence.

[0012] Furthermore, four connecting arms are configured, with the main bodies of two adjacent arms perpendicular to each other, which ensures that the airflow is uniformly guided.

[0013] Furthermore, the fan blade includes a housing and a plurality of blades disposed around the periphery of the housing. The blades are bent toward the same side as the coupling end, so that after the airflow passes through the arc-shaped air guide, it can smoothly enter the working area of ​​the fan blade through the coupling end without adjusting the flow direction, thereby reducing energy loss caused by sudden changes in airflow direction.

[0014] Furthermore, it also includes an end cap and a handle. The end cap and the mounting plate enclose a first chamber in which a drive module is installed. The handle is installed on the outside of the air duct and has a second chamber. The second chamber is equipped with a control module electrically connected to the drive module. The housing has a rotating shaft rotatably coupled to the bearing seat. The inner side of the housing is equipped with a magnetic component. The outer side of the rotating shaft is equipped with a winding module. The winding module is electrically connected to the control module through the drive module. The above arrangement integrates the drive module in the space behind the mounting plate, close to the fan blades, thereby improving the heat dissipation effect. Attached Figure Description

[0015] Figure 1 This is a 3D view of the wind turbine assembly; Figure 2 Assembly structure diagram of mounting base, end cover, fan blade, and connecting arm; Figure 3 This is a sectional view of the fan assembly; Figure 4 A three-dimensional view of the connecting arm component; Figure 5 This is a side view of the wind turbine assembly. Detailed Implementation

[0016] The specific embodiments of this application are described below with reference to the accompanying drawings.

[0017] See Figures 1 to 5 This embodiment provides a portable fan assembly, including a fan casing 1, a mounting base 2, fan blades 3, an end cap 4, and a handle 5. The fan casing 1 has an internal air duct 10 extending axially therein. The air duct 10 has an air inlet side 101 on one side and an air outlet side 102 on the opposite side. The mounting base 2 is disposed within the air duct 10 and includes a bearing 21 extending axially along the fan casing 1 and a mounting plate 22 constructed around the bearing 21. The fan blades 3 are rotatably coupled to the bearing 21. The mounting plate 22 is circumferentially spaced with a plurality of connecting arms 6 that connect to the inner wall of the air duct 1. Each connecting arm 6 includes a coupling end 61 that is coupled to the mounting plate 22 and an arm body 62 that connects the coupling end 61 and the inner wall of the air duct 1. The coupling end 61 extends radially along the air duct 1. The arm body 62 is constructed as a plate that extends parallel to the axial direction of the air duct 1, and an arc-shaped air guide 63 that bends toward the fan blade 3 is constructed at one end connected to the coupling end 61.

[0018] See Figure 2 and Figure 3The end cap 4 and the mounting plate 22 enclose a first chamber 41 in which a drive module is installed. The handle 5 is installed on the outside of the air duct 1 and has a second chamber 51. The second chamber 51 is equipped with a control module (not shown in the figure) that is electrically connected to the drive module. The fan blade 3 includes a housing 31 and a plurality of blades 32 disposed around the housing 31. The housing 31 has a rotating shaft 33 that is rotatably coupled to the bearing seat 21. A magnetic component 34 is disposed on the inner side of the housing 31. The outer side of the bearing seat 21... A winding module 23 is provided on the side. The winding module 23 is electrically connected to the control module through the drive module. When the winding module 23 is energized, it can drive the rotating shaft 33 to rotate through the magnetic component 34, thereby driving the airflow from the side of the air duct 10 near the mounting base 2 towards the side of the fan blade 3, that is, driving the airflow from the air inlet side to the air outlet side. The above arrangement integrates the drive module in the space behind the mounting plate 22, which is close to the fan blade 3 to improve the heat dissipation effect. In addition, the control module is integrated into the handle 5 through the second chamber 51, which not only optimizes the circuit structure, but also facilitates the operation of the fan assembly.

[0019] See Figure 4 In one embodiment, the connecting arm 6 is constructed as a metal plate formed by bending the coupling end 61 and the arm body 62. This integrated structure not only ensures the strength of the connecting arm 6, but also ensures that the continuity of the metal plate prevents noticeable breaks in airflow, reducing airflow disturbance and lowering vibration and noise. The metal plate can be made of materials such as copper, steel, or iron. The coupling end 61 is fixedly connected to the mounting plate 22 by screws.

[0020] See Figures 2 to 5 In one embodiment, the connecting arm 6 is bent at the end of the arm body 62 away from the mounting plate 22 to form a connecting end 64. The connecting end 64 is fixedly connected to the air duct 1 by screws. The connection structure between the connecting arm 6 and the air duct 1 is simple and easy to assemble and disassemble.

[0021] See Figure 5 In one embodiment, the coupling end 61 extends out of the mounting plate 22, thereby increasing the contact area with the airflow, improving the circumferential guiding effect of the airflow, and increasing the connection area between the coupling end 61 and the arm body 62, thereby improving the strength and rigidity of the connecting arm 6.

[0022] See Figure 4 In some embodiments, the connection between the coupling end 61 and the arm body 62 is an arc transition, so that the airflow transitions smoothly.

[0023] See Figure 5In some embodiments, the coupling end 61 is configured to bend toward the center of the duct 1, thereby effectively guiding the airflow to converge toward the center of the duct 1.

[0024] See Figure 5 In some embodiments, the blade 32 and the coupling end 61 are bent toward the same side, such as... Figure 5 In the illustrated embodiment, both the blade 32 and the coupling end 61 are along Figure 5 The clockwise curvature of the airflow guide 63 allows the airflow to smoothly enter the working area of ​​the fan blade 3 through the coupling end 61 without adjusting the flow direction, thereby reducing energy loss caused by sudden changes in airflow direction.

[0025] See Figure 5 In some embodiments, the extension line of the arm body 62 is offset from the axis of the air duct 1 by a predetermined distance. The above arrangement makes each arm body 62 form an asymmetrical distribution, which can make the airflow form a spiral flow when passing through the arm body 62, thereby enhancing the stability and uniformity of the air outlet.

[0026] See Figure 5 In some embodiments, four connecting arms 6 are configured, with adjacent arm bodies 62 perpendicular to each other, and the angle between the line connecting the ends of two adjacent arm bodies 62 and the center of the duct 1 under axial projection is the same, such as... Figure 5 In the illustrated embodiment, the included angle between any two adjacent connecting lines is 90°. This structure further improves the uniformity of airflow guidance and reduces local airflow turbulence.

[0027] Compared with the prior art, the main body 62 of the arm in this application is designed as a plate extending along the axial direction of the air duct 1, which reduces the axial obstruction to the airflow. One end of the main body 62 connected to the coupling end 61 is constructed with an arc-shaped air guide 63 that bends and extends toward the fan blade 3. This structure can smoothly guide the passing airflow to the working area of ​​the fan blade 3, improving the uniformity of the airflow entering the fan blade 3 area. At the same time, the coupling end 61 is arranged to extend in a direction perpendicular to the axial direction of the air duct 1, effectively guiding the airflow into the fan blade 3 circumferentially. The connecting arm 6 of this application reduces airflow turbulence and improves the air outlet effect and air outlet stability of the fan.

[0028] The contents of the various embodiments of this application can be combined and referenced with each other, and all fall within the protection scope of this application.

[0029] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this application is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this application should also fall within the protection scope of the claims of this application. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this application.

Claims

1. A handheld fan assembly, characterized in that, The device includes a duct (1), a mounting base (2), and fan blades (3). The duct (1) has an internal air duct (10) extending axially therein. The mounting base (2) is disposed within the air duct (10) and includes a bearing (21) extending axially along the duct (1) and a mounting plate (22) disposed around the bearing (21). The fan blades (3) are rotatably coupled to the bearing (21). The mounting plate (22) has a plurality of connecting arms that connect to the inner wall of the duct (1) arranged circumferentially at intervals. The connecting arm (6) includes a coupling end (61) coupled to the mounting plate (22) and an arm body (62) connecting the coupling end (61) and the inner wall of the air duct (1). The coupling end (61) extends radially along the air duct (1). The arm body (62) is constructed as a plate extending axially parallel to the air duct (1) and has an arc-shaped air guide (63) that bends toward the fan blade (3) at one end connected to the coupling end (61).

2. The handheld fan assembly according to claim 1, characterized in that, The coupling end (61) extends out of the mounting plate (22).

3. The handheld fan assembly according to claim 2, characterized in that, The coupling end (61) is configured to be bent toward the center of the air duct (1).

4. The handheld fan assembly according to claim 1, characterized in that, The connecting arm (6) is constructed as a metal plate that forms the coupling end (61) and the arm body (62) by bending.

5. The fan assembly according to claim 4, characterized in that, The connecting arm (6) is bent at the end of the arm body (62) away from the mounting plate (22) to form a connecting end (64), and the connecting end (64) is fixedly connected to the air duct (1) by screws.

6. The handheld fan assembly according to claim 1, characterized in that, The connection between the coupling end (61) and the arm body (62) is a rounded transition.

7. The handheld fan assembly according to claim 1, characterized in that, The extension line of the arm body (62) is offset from the axis of the air duct (1) by a predetermined distance, and the angle between the line connecting the ends of two adjacent arm bodies (62) and the center of the air duct (1) under axial projection is the same.

8. The handheld fan assembly according to claim 7, characterized in that, The connecting arm (6) is configured in four parts, with two adjacent arm bodies (62) perpendicular to each other.

9. The handheld fan assembly according to claim 3, characterized in that, The fan blade (3) includes a housing (31) and a plurality of blades (32) disposed around the periphery of the housing (31), the blades (32) and the coupling end (61) being bent toward the same side.

10. The handheld fan assembly according to claim 9, characterized in that, It also includes an end cap (4) and a handle (5). The end cap (4) and the mounting plate (22) enclose a first chamber (41) in which a drive module is installed. The handle (5) is installed on the outside of the air duct (1) and has a second chamber (51). The second chamber (51) is equipped with a control module that is electrically connected to the drive module. The housing (31) has a rotating shaft (33) that is rotatably coupled to the bearing seat (21). The inner side of the housing (31) is equipped with a magnetic component (34). The outer side of the bearing seat (21) is equipped with a winding module (23). The winding module (23) is electrically connected to the control module through the drive module.

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