Portable fan

Abstract

A portable fan, comprising: a housing (1) that is provided with air inlet cavities (13), fixed cavities (14), and air ducts (15) in sequence along a length direction, wherein the housing (1) is further provided with air inlets (11) and air outlets (12), each air inlet (11) is communicated with a corresponding air inlet cavity (13), and each air outlet (12) is communicated with a corresponding air duct (15); and brake assemblies that are accommodated in the fixed cavities (14), wherein each brake assembly draws air in through a corresponding air inlet (11), the air passes through a corresponding air inlet cavity (13), the brake assembly, and a corresponding air duct (15) and then is blown out through a corresponding air outlet (12). Each air outlet (12) is arranged along the length direction of a corresponding air duct (15). The housing (1) has an inner surface (1A) and an outer surface (1B), the air outlets (12) are defined by the inner surface (1A) and the outer surface (1B), and the inner surface (1A) and the outer surface (1B) are arranged spaced from each other or are close to each other or overlap each other at the air outlets (12).

Description

Portable fan Technical Field

[0001] This application relates to the field of fan technology, and in particular to a portable fan with good airflow performance. Background Technology

[0002] In recent years, people have been pursuing a more convenient life. In order to meet the needs of outdoor activities or other life scenarios, a variety of portable fan products have appeared on the market, such as handheld fans and neck fans.

[0003] Most portable fans currently on the market still use ordinary axial fan blades. Therefore, the air outlet is located directly on the front shell of the axial fan blade and blows directly at the user. The turbulent airflow and noise generated by the axial fan blade blow directly at the user, resulting in a poor user experience. Summary of the Invention

[0004] The main purpose of this application is to provide a portable fan that, by defining the air outlet together with its inner and outer surfaces, can enhance the air pressure and extend the airflow distance; furthermore, both the inner and outer surfaces guide the airflow, which helps reduce noise. The fan delivers a strong, smooth, and even airflow, providing a good user experience. Attached Figure Description

[0005] This application will describe the embodiments in conjunction with the accompanying drawings. The drawings are for illustrative purposes only and are used to describe the embodiments. Without departing from the principles of this application, those skilled in the art can easily make other embodiments based on the steps described below.

[0006] Figure 1-1 is a schematic diagram of the portable fan of this application;

[0007] Figure 1-2 is a cross-sectional view of the portable fan of this application;

[0008] Figures 1-3 are partial exploded views of the portable fan of this application;

[0009] Figure 1-4 is a cross-sectional view of the portable fan of this application from another angle;

[0010] Figure 1-5 is an enlarged view of part D in Figure 1-4;

[0011] Figure 1-6 is a schematic diagram of Figure 1-4 from another angle;

[0012] Figure 1-7 is an enlarged view of part C in Figure 1-2;

[0013] Figures 1-8 are cross-sectional views of the braking assembly of this application;

[0014] Figure 2-1 is a schematic diagram of the portable fan of this application;

[0015] Figure 2-2 is a cross-sectional view of the portable fan of this application;

[0016] Figure 2-3 is a partial exploded view of the portable fan of this application;

[0017] Figure 2-4 is a cross-sectional view of the portable fan of this application from another angle;

[0018] Figure 2-5 is an enlarged view of part D in Figure 2-4;

[0019] Figure 2-6 is a schematic diagram of Figure 2-4 from another angle;

[0020] Figure 2-7 is an enlarged view of part C in Figure 2-2;

[0021] Figure 2-8 is a cross-sectional view of the braking assembly of this application;

[0022] Figure 3-1 is a schematic diagram of the portable fan of this application;

[0023] Figure 3-2 is a cross-sectional view of the portable fan of this application;

[0024] Figure 3-3 is a partial exploded view of the portable fan of this application;

[0025] Figure 3-4 is a partial cross-sectional view of the portable fan of this application;

[0026] Figure 3-5 is a cross-sectional view of the portable fan of this application from another angle;

[0027] Figure 3-6 is an enlarged view of part D in Figure 3-5;

[0028] Figure 3-7 is a schematic diagram of Figure 3-5 from another angle;

[0029] Figure 3-8 is an enlarged view of part C in Figure 3-2;

[0030] Figure 3-9 is a cross-sectional view of the braking assembly of this application;

[0031] Figure 4-1 is a schematic diagram of the portable fan of this application;

[0032] Figure 4-2 is a cross-sectional view of the portable fan of this application;

[0033] Figure 4-3 is a partial exploded view of the portable fan of this application;

[0034] Figure 4-4 is an enlarged view of part C in Figure 4-2;

[0035] Figure 4-5 is a cross-sectional view of the braking assembly of this application;

[0036] Figure 5-1 is a schematic diagram of the portable fan of this application;

[0037] Figure 5-2 is a cross-sectional view of the portable fan of this application;

[0038] Figure 5-3 is a schematic diagram of the portable fan of this application from another angle;

[0039] Figure 5-4 is a partial exploded view of the portable fan of this application;

[0040] Figure 5-5 is an enlarged view of part C in Figure 5-2;

[0041] Figures 5-6 are cross-sectional views of the braking assembly of this application;

[0042] Figure 6-1 is a schematic diagram of the neck fan of this application;

[0043] Figure 6-2 is a cross-sectional view of the neck fan of this application;

[0044] Figure 6-3 is a partial exploded view of the neck fan of this application;

[0045] Figure 6-4 is a cross-sectional view of another embodiment of the neck fan of this application;

[0046] Figure 6-5 is a cross-sectional view of another embodiment of the neck fan of this application;

[0047] Figure 6-6 is a cross-sectional view of another embodiment of the neck fan of this application;

[0048] Figures 6-7 are cross-sectional views of another embodiment of the neck fan of this application;

[0049] Figures 6-8 are cross-sectional views of another embodiment of the neck fan of this application;

[0050] Figure 6-9 is an enlarged view of part C in Figure 6-2;

[0051] Figure 6-10 is a cross-sectional view of the braking assembly of this application;

[0052] Figure 7-1 is an overall schematic diagram of the shell structure according to an embodiment of this application;

[0053] Figure 7-2 is a schematic diagram of the section cut along point AA in Figure 7-1;

[0054] Figure 7-3 is an enlarged view of part B in Figure 7-2;

[0055] Figure 7-4 is an exploded view of the connection portion according to an embodiment of this application;

[0056] Figure 7-5 is an overall schematic diagram of a neck fan according to another embodiment of this application;

[0057] Figure 7-6 is a schematic diagram of the section cut along CC in Figure 7-5;

[0058] Figure 7-7 is an enlarged view of part D in Figure 7-6;

[0059] Figure 8-1 is a perspective view of an embodiment of the neck fan of this application;

[0060] Figure 8-2 is a cross-sectional view of an embodiment of the neck fan of this application;

[0061] Figure 8-3 is an enlarged view of part A in Figure 8-2;

[0062] Figure 8-4 is a circuit diagram of one embodiment of the neck fan of this application;

[0063] Figure 8-5 is a schematic diagram of an embodiment of the neck fan of this application after the housing has been removed;

[0064] Figure 8-6 is a perspective view of another embodiment of the neck fan of this application;

[0065] Figure 8-7 is a cross-sectional view of another embodiment of the neck fan of this application;

[0066] Figure 8-8 is a cross-sectional view of another embodiment of the neck fan of this application;

[0067] Figure 9-1 is a perspective view of an embodiment of the portable fan of this application;

[0068] Figure 9-2 is a partial exploded view of an embodiment of the portable fan of this application;

[0069] Figure 9-3 is a cross-sectional view of an embodiment of the portable fan of this application;

[0070] Figure 9-4 is a perspective view of another embodiment of the portable fan of this application;

[0071] Figure 9-5 is a partial exploded view of another embodiment of the portable fan of this application;

[0072] Figures 9-6 are perspective views of another embodiment of the portable fan of this application;

[0073] Figure 10-1 is a perspective view of an embodiment of the portable fan of this application;

[0074] Figure 10-2 is a sectional view of Figure 10-1;

[0075] Figure 10-3 is a partial exploded view of an embodiment of the portable fan of this application;

[0076] Figure 10-4 is a perspective view of another embodiment of the portable fan of this application;

[0077] Figure 10-5 is a cross-sectional view of another embodiment of the portable fan of this application. Detailed Implementation

[0078] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0079] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0080] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0081] Option 1

[0082] In one embodiment, as shown in Figures 1-1 to 1-3, a schematic diagram of a portable fan according to this application is presented. The portable fan includes a housing 1 and a braking assembly. The housing 1 has an air inlet chamber 13, a fixed chamber 14, and an air duct 15 arranged sequentially along its length. The housing 1 also has an air inlet 11 and an air outlet 12. The air inlet 11 is connected to the air inlet chamber 13, and the air outlet 12 is connected to the air duct 15. The braking assembly is housed in the fixed chamber 14. The braking assembly draws air in from the air inlet 11, passes through the air inlet chamber 13, the braking assembly, and the air duct 15, and then blows it out from the air outlet 12.

[0083] As shown in Figures 1-1, 1-3, and 1-4, the air outlet 12 is arranged along the length of the air duct 15. The housing 1 has an inner surface 1A and an outer surface 1B, and the air outlet 12 is defined by the inner surface 1A and the outer surface 1B. The inner surface 1A and the outer surface 1B are spaced apart at the air outlet 12, or close to or overlapping each other. The braking assembly is housed in the fixed cavity 14, thus making the portable fan safer. The air outlet 12 is defined by the inner surface 1A and the outer surface 1B of the housing 1, resulting in a stronger and smoother, more uniform airflow, providing a good user experience.

[0084] In one embodiment, as shown in Figures 1-4 to 1-6, the air outlet 12 has an outlet 121. At the outlet 121 of the air outlet 12, the distance between the inner surface 1A and the outer surface 1B is 1-5mm, which facilitates the airflow to be ejected from the outlet 121 of the air outlet 12, resulting in a stronger airflow.

[0085] In one embodiment, as shown in Figures 1-3 to 1-5, the housing 1 includes a first wall 1a and a second wall 1b, which are separately formed and then assembled. A first side of the first wall 1a is closedly connected to a first side of the second wall 1b, and a second side of the first wall 1a is opposite to and spaced apart from a second side of the second wall 1b. The outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b define the air outlet 12. In this embodiment, the first and second sides of the first wall 1a extend in the same direction, and the second side of the first wall 1a extends beyond the first side of the first wall 1a; the first and second sides of the second wall 1b extend in the same direction, and the second side of the second wall 1b extends beyond the first side of the second wall 1b. The depth of the air outlet 12 is 15-23 mm. An air outlet 12 with a suitable depth can better rectify the airflow, reduce noise, and avoid turbulence.

[0086] In one embodiment, as shown in Figures 1-3 to 1-6, the portable fan further includes a plurality of guide members 151, which are spaced apart along the length of the air duct 15. The guide members 151 are used to guide the airflow generated by the braking assembly toward the air outlet 12, and simultaneously abut against the first wall 1a and the second wall 1b. By providing the guide members 151, the airflow is rectified and guided, reducing noise and avoiding turbulence. It should be understood that the outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b may be spaced apart to define the air outlet 12; alternatively, at least a portion of the outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b may not be spaced apart, i.e., they may overlap. The guide members 151 separate the overlapping portion, thereby defining the air outlet 12.

[0087] In one embodiment, as shown in Figures 1-3 to 1-6, an air intake 1d is also provided on one side of the air outlet 12. Air from outside the portable fan is drawn in by the airflow blown out of the air outlet 12 through the air intake 1d. The housing 1 also includes a third wall 1c, which is located on the outer side of the second side of the second wall 1b. The third wall 1c is sheet-like, and is spaced apart from the second side of the second wall 1b to form the air intake 1d. By providing the air intake 1d on one side of the air outlet 12, external natural airflow can be drawn in on top of the air generated by the braking assembly, forming a larger but equally smooth and uniform airflow together with the airflow from the air outlet 12, resulting in a better user experience. The air intake 1d extends parallel to the air outlet 12, and the air intake 1d and the air outlet 12 are arranged side by side along the length direction, further enhancing the airflow effect.

[0088] In one embodiment, as shown in Figures 1-3 to 1-6, the distance between the second side of the third wall 1c and the second side of the second wall 1b is 2.7-3.1 mm, and the distance between the second side of the third wall 1c and the second side of the first wall 1a is 6.6-12.6 mm. The width of the air intake 1d is also small, allowing air to be ejected with greater force. The outer surface 1B of the second side of the first wall 1a is formed with a Coanda surface, and the air outlet 12 is arranged to guide airflow onto the Coanda surface.

[0089] In one embodiment, as shown in Figures 1-3 to 1-6, one side of the third wall 1c extends in the same direction as the second side of the second wall 1b, and one side of the third wall 1c extends beyond the second side of the second wall 1b; the other side of the third wall 1c extends in the same direction as the second side of the first wall 1a, and the other side of the third wall 1c does not extend beyond the second side of the first wall 1a. The shallow depth of the air intake 1d facilitates the airflow from the air outlet 12 to draw in external airflow through the air intake 1d. Furthermore, since one side of the third wall 1c extends beyond the second side of the second wall 1b, the third wall 1c can better guide the airflow, resulting in a smoother and more uniform airflow between the air outlet 12 and the air intake 1d.

[0090] In one embodiment, as shown in Figures 1-1 to 1-3, the length of the air inlet cavity 13 is 20-30 mm, and the length of the air duct 15 is 2-6 times the length of the air inlet cavity 13. The maximum cross-sectional area of ​​the air duct 15 is smaller than the minimum cross-sectional area of ​​the air inlet cavity 13, the maximum cross-sectional area of ​​the fixed cavity 14 is less than or equal to the minimum cross-sectional area of ​​the air inlet cavity 13, and the minimum cross-sectional area of ​​the fixed cavity 14 is greater than or equal to the maximum cross-sectional area of ​​the air duct 15. The cross-sections of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 decrease along their lengths, and the transitions between adjacent air inlets 13, fixed cavities 14, and air ducts 15 are smooth. The air inlet cavity 13 is short in length but has a large cross-section, which is beneficial for air intake and airflow guidance, increasing the air intake volume. Furthermore, the air inlet cavity 13 effectively avoids turbulence and noise caused by direct contact between external airflow and the braking assembly. The cross-section of the air duct 15 is small, and the air generated by the braking component is pressurized and concentrated in the air duct 15 to enhance the air outlet effect; the length of the air duct 15 is long, which can increase the air outlet range and improve the blowing experience.

[0091] In one embodiment, as shown in Figures 1-1 to 1-3, the portion of the housing 1 within the fixing cavity 14 is cylindrical, with a diameter of 28-35 mm and a length of 30-40 mm. The smaller diameter of the fixing cavity 14 allows for a smaller overall cross-section of the housing 1, resulting in a relatively slender and symmetrical neck fan that is easy to carry. The smaller length of the fixing cavity 14 also allows for a more reasonable design of the air duct 15 for airflow.

[0092] In one embodiment, as shown in Figures 1-2, 1-3, 1-7, and 1-8, the braking assembly includes a motor 2 and a fan 3. The motor 2 includes a cylinder 21, a stator assembly 22, and a rotor assembly 23. The motor 2 is a three-phase high-speed motor 2, which can provide high-speed and stable rotational speed, improving the airflow effect. At least a portion of the fan 3 is disposed within the cylinder 21. In this embodiment, the entire fan 3 is disposed within the cylinder 21. Therefore, the braking assembly has a compact and reasonable structure, and occupies a relatively short length of the cavity.

[0093] In one embodiment, as shown in Figures 1-2, 1-3, 1-7, and 1-8, the braking assembly further includes a buffer sleeve 33 disposed outside the cylinder 21. The buffer sleeve 33 includes an annular portion 331 and a plurality of protrusions 332 spaced around the outer surface 1B of the annular portion 331. When the braking assembly is received in the fixed cavity 14, at least a portion of the plurality of protrusions 332 is compressed, thereby the braking assembly can be securely fixed in the fixed cavity 14. The buffer sleeve 33 provides the braking assembly with strong friction and shock absorption capacity, effectively reducing the noise generated by the braking assembly.

[0094] In one embodiment, as shown in Figures 1-2, 1-3, 1-7, and 1-8, a first limiting part 17 is provided between the fixed cavity 14 and the air inlet cavity 13, and a second limiting part 18 is provided between the fixed cavity 14 and the air duct 15. The buffer sleeve 33 also includes a wrapping part 333 connecting the two ends of the buffer sleeve 33. The wrapping part 333 at one end isolates and buffers the end of the cylinder 21 and the first limiting part 17, and the wrapping part 333 at the other end isolates and buffers the end of the cylinder 21 and the second limiting part 18. The wrapping part 333 further provides buffering and shock absorption capacity for the braking assembly, further reducing the noise generated by the braking assembly. In addition, the cooperation of the first limiting part 17, the second limiting part 18, and the wrapping parts 333 at both ends further limits the axial movement of the braking assembly. Therefore, the braking assembly is firmly fixed in the fixed cavity 14, and the braking assembly can generate air stably, continuously, and with low noise. The buffer sleeve 33 can be made of silicone, foam, or other materials with cushioning capabilities, without limitation. Of course, in other embodiments, the braking assembly may not have the buffer sleeve 33.

[0095] In one embodiment, as shown in Figures 1-2, 1-3, 1-7, and 1-8, the cylindrical body 21 includes an outer ring portion 211, an inner ring portion 212, and a plurality of connecting blades 213 connecting the outer ring portion 211 and the inner ring portion 212. The inner ring portion 212 is located on the side of the outer ring portion 211 near the air duct 15, and the inner ring portion 212 protrudes slightly towards the air duct 15. This allows for a larger space on the side of the outer ring portion 211 facing the air inlet cavity 13 to accommodate other structures, resulting in a reasonable spatial layout within the cylindrical body 21. A base plate 214 is provided within the inner ring portion 212, and a hollow shaft cylinder 215 extends axially from the base plate 214 towards the air inlet cavity 13. The rotor assembly 23 includes a rotating shaft 231, a bearing 232, and a magnetic ring 233. The rotating shaft 231 and at least one bearing 232 are disposed within the shaft sleeve 215. In this embodiment, the number of bearings 232 is two, with both bearings 232 disposed within the shaft sleeve 215. Alternatively, one of the two bearings 232 may be disposed within the shaft sleeve 215, and the other may be disposed outside the shaft sleeve 215, as long as a stable fit between the rotating shaft 231 and the shaft sleeve 215 is ensured. The stator assembly 22 is disposed radially outside the rotating shaft 231 and the shaft sleeve 215, and the magnetic ring 233 is disposed radially outside the stator assembly 22. The fan 3 is disposed on the side of the outer ring portion 211 near the air inlet cavity 13, and the fan 3 is fixed to the rotating shaft 231.

[0096] In one embodiment, as shown in Figures 1-2, 1-3, 1-7, and 1-8, the rotor assembly 23 further includes a housing 234, which is fitted around the magnetic ring 233 and tightly fitted with the rotating shaft 231. The fan 3 is fixed to the rotating shaft 231, and the fan 3 and the motor 2 are coaxially arranged. The stator assembly 22 generates a magnetic field, causing the magnetic ring 233 and the housing 234 to rotate. The housing 234 drives the rotating shaft 231 and the fan 3 to rotate simultaneously. This eliminates the need for additional transmission devices on the motor 2 and the fan 3, effectively improving the transmission efficiency of the neck fan.

[0097] In one embodiment, as shown in Figures 1-2, 1-3, 1-7, and 1-8, the fan 3 includes a hub 31 and a plurality of blades 32 spaced around the outside of the hub 31. The difference between any two of the diameter of the maximum cross-section of the hub 31, the diameter of the housing 234, and the diameter of the inner ring 212 is less than 2 mm. The airflow generated by the plurality of blades 32 can smoothly pass through the area between the housing 234 and the outer ring 211, and the area between the inner ring 212 and the outer ring 211, and is directed towards the air duct 15. The hub 31, the housing 234, and the inner ring 212 are axially aligned, and their diameters are similar, resulting in a compact structure for the motor 2 and the fan 3.

[0098] In one embodiment, as shown in Figures 1-2, 1-3, 1-7, and 1-8, the inner ring portion 212 forms a receiving portion 216 on the side of the substrate 214 facing the air duct 15. The drive plate 24 is disposed in the receiving portion 216, and the control member 42 is electrically connected to the drive plate 24. The receiving portion 216 is directly formed by the inner ring portion 212, that is, the drive plate 24 is directly snapped into the inner ring portion 212 and is positioned facing the air duct 15, which facilitates the connection of the drive plate 24 with other electrical components. The substrate 214 also has a notch, through which wires are electrically connected to the stator assembly 22 and the drive plate 24.

[0099] In one embodiment, as shown in Figures 1-2, 1-3, 1-7, and 1-8, two of the two free ends of the housing 1 are provided with receiving cavities 16. The neck fan also includes a control assembly, which includes a power supply component 41 that provides power to the braking assembly, and a control component 42 that controls the braking assembly. The power supply component 41 is electrically connected to the control component 42, and the control component 42 is electrically connected to the drive plate 24. The power supply component 41 and the control component 42 are housed in the receiving cavities 16. The control component 42 includes a switch 43 and an interface 44 exposed outside the free ends of the housing 1.

[0100] It should be understood that in this embodiment, the air inlet cavity 13, the fixing cavity 14, the air duct 15, and the receiving cavity 16 are sequentially arranged along the length direction of the housing 1. Of course, in other embodiments, the air inlet cavity 13, the fixing cavity 14, and the air duct 15 may also be sequentially arranged along the length direction of the housing 1, and the receiving cavity 16 may be disposed on one side of the air inlet cavity 13 or on one side of the air duct 15.

[0101] In one embodiment, as shown in Figures 1-1 to 1-4, the portable fan is a neck-mounted fan. The housing 1 is symmetrically provided with two air inlet chambers 13, two fixed chambers 14, and two air ducts 15. Two braking assemblies are respectively disposed in the two fixed chambers 14. When worn with the air outlet 12 facing upwards, the air generated by the braking assemblies blows towards the user's head, and the air intake 1d can accelerate the airflow near the neck, thus having a sweat-absorbing effect. Alternatively, when worn with the air outlet 12 facing downwards, the air in the braking assemblies blows towards the user's neck, and the air intake 1d can accelerate the airflow near the head, thus having a sweat-absorbing effect. In other embodiments, the portable fan can also be a handheld fan, a clip-on fan, a versatile fan, or other portable fans, and is not limited to these examples.

[0102] Option 2

[0103] In one embodiment, as shown in Figures 2-1 to 2-3, a schematic diagram of the portable fan of this application is presented. The portable fan includes a housing 1 and a braking assembly. The housing 1 has an air inlet cavity 13, a fixed cavity 14, and an air duct 15 arranged sequentially along its length. The housing 1 also has an air inlet 11 and an air outlet 12. The air inlet 11 is connected to the air inlet cavity 13, and the air outlet 12 is connected to the air duct 15. The braking assembly is housed in the fixed cavity 14. The braking assembly draws air in from the air inlet 11, passes through the air inlet cavity 13, the braking assembly, and the air duct 15, and then blows it out from the air outlet 12.

[0104] As shown in Figures 2-1, 2-3, and 2-4, the air outlet 12 is arranged along the length of the air duct 15. The housing 1 has an inner surface 1A and an outer surface 1B, and the air outlet 12 is defined by the inner surface 1A and the outer surface 1B. The inner surface 1A and the outer surface 1B are spaced apart at the air outlet 12, or close to each other or overlapping. The braking assembly is housed in the fixing cavity 14, thus making the portable fan safer. The air outlet 12 is defined by the inner surface 1A and the outer surface 1B of the housing 1, resulting in a stronger and smoother, more uniform airflow, providing a good user experience.

[0105] In one embodiment, as shown in Figures 2-4 to 2-6, the air outlet 12 has an outlet 121. At the outlet 121 of the air outlet 12, the distance between the inner surface 1A and the outer surface 1B is 1-5mm, which facilitates the airflow to be ejected from the outlet 121 of the air outlet 12, resulting in a stronger airflow.

[0106] In one embodiment, as shown in Figures 2-3 to 2-5, the housing 1 includes a first wall 1a and a second wall 1b, which are separately formed and then assembled. A first side of the first wall 1a is closedly connected to a first side of the second wall 1b, and a second side of the first wall 1a is opposite to and spaced apart from a second side of the second wall 1b. The outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b define the air outlet 12. In this embodiment, the first and second sides of the first wall 1a extend in the same direction, and the second side of the first wall 1a extends beyond the first side of the first wall 1a; the first and second sides of the second wall 1b extend in the same direction, and the second side of the second wall 1b extends beyond the first side of the second wall 1b. The depth of the air outlet 12 is 15-23 mm. An air outlet 12 with a suitable depth can better rectify the airflow, reduce noise, and avoid turbulence.

[0107] In one embodiment, as shown in Figures 2-3 to 2-6, the portable fan further includes a plurality of guide members 151, which are spaced apart along the length of the air duct 15. The guide members 151 are used to guide the airflow generated by the braking assembly toward the air outlet 12, and simultaneously abut against the first wall 1a and the second wall 1b. By providing the guide members 151, the airflow is rectified and guided, reducing noise and avoiding turbulence. It should be understood that the outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b may be spaced apart to define the air outlet 12; alternatively, at least a portion of the outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b may not be spaced apart, i.e., they may overlap. The guide members 151 separate the overlapping portion, thereby defining the air outlet 12.

[0108] In one embodiment, as shown in Figures 2-3 to 2-6, an air intake 1d is also provided on one side of the air outlet 12. Air from outside the portable fan is drawn in by the airflow blown out of the air outlet 12 through the air intake 1d. The housing 1 also includes a third wall 1c, which is located on the outer side of the second side of the second wall 1b. The third wall 1c is sheet-like, and is spaced apart from the second side of the second wall 1b to form the air intake 1d. By providing the air intake 1d on one side of the air outlet 12, external natural airflow can be drawn in on top of the air generated by the braking assembly, forming a larger but equally smooth and uniform airflow together with the airflow from the air outlet 12, resulting in a better user experience. The air intake 1d extends parallel to the air outlet 12, and the air intake 1d and the air outlet 12 are arranged side by side along the length direction, further enhancing the airflow effect.

[0109] In one embodiment, as shown in Figures 2-3 to 2-6, the distance between the second side of the third wall 1c and the second side of the second wall 1b is 2.7-3.1 mm, and the distance between the second side of the third wall 1c and the second side of the first wall 1a is 6.6-12.6 mm. The width of the air intake 1d is also small, allowing air to be ejected with greater force. The outer surface 1B of the second side of the first wall 1a is formed with a Coanda surface, and the air outlet 12 is arranged to guide airflow onto the Coanda surface.

[0110] In one embodiment, as shown in Figures 2-3 to 2-6, one side of the third wall 1c extends in the same direction as the second side of the second wall 1b, and one side of the third wall 1c extends beyond the second side of the second wall 1b; the other side of the third wall 1c extends in the same direction as the second side of the first wall 1a, and the other side of the third wall 1c does not extend beyond the second side of the first wall 1a. The shallow depth of the air intake 1d facilitates the airflow from the air outlet 12 to draw in external airflow through the air intake 1d. Furthermore, since one side of the third wall 1c extends beyond the second side of the second wall 1b, the third wall 1c can better guide the airflow, resulting in a smoother and more uniform airflow between the air outlet 12 and the air intake 1d.

[0111] In one embodiment, as shown in Figures 2-1 to 2-3, the length of the air inlet cavity 13 is 20-30 mm, and the length of the air duct 15 is 2-6 times the length of the air inlet cavity 13. The maximum cross-sectional area of ​​the air duct 15 is smaller than the minimum cross-sectional area of ​​the air inlet cavity 13, the maximum cross-sectional area of ​​the fixed cavity 14 is less than or equal to the minimum cross-sectional area of ​​the air inlet cavity 13, and the minimum cross-sectional area of ​​the fixed cavity 14 is greater than or equal to the maximum cross-sectional area of ​​the air duct 15. The cross-sections of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 decrease along their lengths, and the transitions between adjacent air inlets 13, fixed cavities 14, and air ducts 15 are smooth. The air inlet cavity 13 is short in length but has a large cross-section, which is beneficial for air intake and airflow guidance, increasing the air intake volume. Furthermore, the air inlet cavity 13 effectively avoids turbulence and noise caused by direct contact between external airflow and the braking assembly. The cross-section of the air duct 15 is small, and the air generated by the braking component is pressurized and concentrated in the air duct 15 to enhance the air outlet effect; the length of the air duct 15 is long, which can increase the air outlet range and improve the blowing experience.

[0112] In one embodiment, as shown in Figures 2-1 to 2-3, the portion of the housing 1 within the fixing cavity 14 is cylindrical, with a diameter of 28-35 mm and a length of 30-40 mm. The smaller diameter of the fixing cavity 14 allows for a smaller overall cross-section of the housing 1, resulting in a relatively slender and well-proportioned neck fan that is easy to carry. The smaller length of the fixing cavity 14 also allows for a more reasonable design of the length of the air duct 15.

[0113] In one embodiment, as shown in Figures 2-2, 2-3, 2-7, and 2-8, the braking assembly includes a motor 2 and a fan 3. The motor 2 includes a cylinder 21, a stator assembly 22, and a rotor assembly 23. The motor 2 is a three-phase high-speed motor 2, which can provide high-speed and stable rotational speed, improving the airflow effect. At least a portion of the fan 3 is disposed within the cylinder 21. In this embodiment, the entire fan 3 is disposed within the cylinder 21. Therefore, the braking assembly has a compact and reasonable structure, and occupies a relatively short length of the cavity.

[0114] In one embodiment, as shown in Figures 2-2, 2-3, 2-7, and 2-8, the braking assembly further includes a buffer sleeve 33 disposed outside the cylinder 21. The buffer sleeve 33 includes an annular portion 331 and a plurality of protrusions 332 spaced around the outer surface 1B of the annular portion 331. When the braking assembly is received in the fixed cavity 14, at least a portion of the plurality of protrusions 332 is compressed, thereby the braking assembly can be securely fixed in the fixed cavity 14. The buffer sleeve 33 provides the braking assembly with strong friction and shock absorption capacity, effectively reducing the noise generated by the braking assembly.

[0115] In one embodiment, as shown in Figures 2-2, 2-3, 2-7, and 2-8, a first limiting part 17 is provided between the fixed cavity 14 and the air inlet cavity 13, and a second limiting part 18 is provided between the fixed cavity 14 and the air duct 15. The buffer sleeve 33 also includes a wrapping part 333 connecting the two ends of the buffer sleeve 33. The wrapping part 333 at one end isolates and buffers the end of the cylinder 21 and the first limiting part 17, and the wrapping part 333 at the other end isolates and buffers the end of the cylinder 21 and the second limiting part 18. The wrapping part 333 further provides buffering and shock absorption capacity for the braking assembly, further reducing the noise generated by the braking assembly. In addition, the cooperation of the first limiting part 17, the second limiting part 18, and the wrapping parts 333 at both ends further limits the axial movement of the braking assembly. Therefore, the braking assembly is firmly fixed in the fixed cavity 14, and the braking assembly can generate air stably, continuously, and with low noise. The buffer sleeve 33 can be made of silicone, foam, or other materials with cushioning capabilities, without limitation. Of course, in other embodiments, the braking assembly may not have the buffer sleeve 33.

[0116] In one embodiment, as shown in Figures 2-2, 2-3, 2-7, and 2-8, the cylindrical body 21 includes an outer ring portion 211, an inner ring portion 212, and a plurality of connecting blades 213 connecting the outer ring portion 211 and the inner ring portion 212. The inner ring portion 212 is located on the side of the outer ring portion 211 near the air duct 15, and the inner ring portion 212 protrudes slightly towards the air duct 15. This allows for a larger space on the side of the outer ring portion 211 facing the air inlet cavity 13 to accommodate other structures, resulting in a reasonable spatial layout within the cylindrical body 21. A base plate 214 is provided within the inner ring portion 212, and a hollow shaft cylinder 215 extends axially from the base plate 214 towards the air inlet cavity 13. The rotor assembly 23 includes a rotating shaft 231, a bearing 232, and a magnetic ring 233. The rotating shaft 231 and at least one bearing 232 are disposed within the shaft sleeve 215. In this embodiment, the number of bearings 232 is two, with both bearings 232 disposed within the shaft sleeve 215. Alternatively, one of the two bearings 232 may be disposed within the shaft sleeve 215, and the other may be disposed outside the shaft sleeve 215, as long as a stable fit between the rotating shaft 231 and the shaft sleeve 215 is ensured. The stator assembly 22 is disposed radially outside the rotating shaft 231 and the shaft sleeve 215, and the magnetic ring 233 is disposed radially outside the stator assembly 22. The fan 3 is disposed on the side of the outer ring portion 211 near the air inlet cavity 13, and the fan 3 is fixed to the rotating shaft 231.

[0117] In one embodiment, as shown in Figures 2-2, 2-3, 2-7, and 2-8, the rotor assembly 23 further includes a housing 234, which is fitted around the magnetic ring 233 and tightly fitted with the rotating shaft 231. The fan 3 is fixed to the rotating shaft 231, and the fan 3 and motor 2 are coaxially arranged. The stator assembly 22 generates a magnetic field, causing the magnetic ring 233 and housing 234 to rotate. The housing 234 drives the rotating shaft 231 and fan 3 to rotate simultaneously. This eliminates the need for additional transmission devices for the motor 2 and fan 3, effectively improving the transmission efficiency of the neck fan.

[0118] In one embodiment, as shown in Figures 2-2, 2-3, 2-7, and 2-8, the fan 3 includes a hub 31 and a plurality of blades 32 spaced around the outside of the hub 31. Any two of the diameter of the maximum cross-section of the hub 31, the diameter of the housing 234, and the diameter of the inner ring 212 differ by 0.5 mm. The airflow generated by the plurality of blades 32 can smoothly pass through the area between the housing 234 and the outer ring 211, and the area between the inner ring 212 and the outer ring 211, and is blown towards the air duct 15. The hub 31, the housing 234, and the inner ring 212 are axially arranged, and their diameters are similar, resulting in a compact structure for the motor 2 and the fan 3.

[0119] In one embodiment, as shown in Figures 2-2, 2-3, 2-7, and 2-8, the inner ring portion 212 forms a receiving portion 216 on the side of the substrate 214 facing the air duct 15. The drive plate 24 is disposed in the receiving portion 216, and the control member 42 is electrically connected to the drive plate 24. The receiving portion 216 is directly formed by the inner ring portion 212, that is, the drive plate 24 is directly snapped into the inner ring portion 212 and is positioned facing the air duct 15, which facilitates the connection of the drive plate 24 with other electrical components. The substrate 214 also has a notch, through which wires are electrically connected to the stator assembly 22 and the drive plate 24.

[0120] In one embodiment, as shown in Figures 2-2, 2-3, 2-7, and 2-8, two of the two free ends of the housing 1 are provided with receiving cavities 16. The neck fan also includes a control assembly, which includes a power supply component 41 that provides power to the braking assembly, and a control component 42 that controls the braking assembly. The power supply component 41 is electrically connected to the control component 42, and the control component 42 is electrically connected to the drive plate 24. The power supply component 41 and the control component 42 are housed in the receiving cavity 16. The control component 42 includes a switch 43 and an interface 44 exposed outside the free end of the housing 1.

[0121] It should be understood that in this embodiment, the air inlet cavity 13, the fixing cavity 14, the air duct 15, and the receiving cavity 16 are sequentially arranged along the length direction of the housing 1. Of course, in other embodiments, the air inlet cavity 13, the fixing cavity 14, and the air duct 15 may also be sequentially arranged along the length direction of the housing 1, and the receiving cavity 16 may be disposed on one side of the air inlet cavity 13 or on one side of the air duct 15.

[0122] In one embodiment, as shown in Figures 2-1 to 2-4, the portable fan is a neck-mounted fan. The housing 1 is symmetrically provided with two air inlet chambers 13, two fixing chambers 14, and two air ducts 15. Two braking assemblies are respectively disposed in the two fixing chambers 14. When worn with the air outlet 12 facing upwards, the air generated by the braking assemblies blows towards the user's head, and the air intake 1d can accelerate the airflow near the neck, thus having a sweat-absorbing effect. Alternatively, when worn with the air outlet 12 facing downwards, the air in the braking assemblies blows towards the user's neck, and the air intake 1d can accelerate the airflow near the head, thus having a sweat-absorbing effect. In other embodiments, the portable fan can also be a handheld fan, a clip-on fan, a versatile fan, or other portable fans, and is not limited to these examples.

[0123] Option 3

[0124] In one embodiment, as shown in Figures 3-1 to 3-3, a schematic diagram of the portable fan of this application is presented. The portable fan includes a housing 1 and a braking assembly. The housing 1 is provided with an air inlet 13, a fixed cavity 14, and an air duct 15 sequentially along its length. The housing 1 is also provided with an air inlet 11 and an air outlet 12. The air inlet 11 is connected to the air inlet 13, and the air outlet 12 is connected to the air duct 15. The braking assembly is housed in the fixed cavity 14. The braking assembly draws air in from the air inlet 11, passes through the air inlet 13, the braking assembly, and the air duct 15, and then blows it out from the air outlet 12.

[0125] As shown in Figures 3-1, 3-2, 3-3, and 3-5, the air outlet 12 is arranged along the length of the air duct 15, which includes a first air-contracting section 152 and a second air-contracting section 153 connected sequentially along the length. The first air-contracting section 152 is adjacent to the fixed cavity 14, and has a smaller cross-section relative to the fixed cavity 14. The second air-contracting section 153 also has a smaller cross-section relative to the first air-contracting section 152. By setting the first air-contracting section 152 and the second air-contracting section 153 with smaller cross-sections, the air pressure increases, the maximum air delivery distance becomes longer, and the air outlet range becomes larger, thus making the air outlet 12 uniformly ventilated. Furthermore, the smaller cross-sectional areas of the first air-contracting section 152 and the second air-contracting section 153 along the length ensure smooth airflow to the air outlet 12, reducing noise.

[0126] The length of the first air-shrinking section 152 is less than the length of the second air-shrinking section 153, and the length of the second air-shrinking section 153 is 2-8 times the length of the first air-shrinking section 152. The first air-shrinking section 152 is the main air-shrinking area, close to the fixed cavity 14, which pressurizes and concentrates the airflow generated by the braking assembly. However, the length of the first air-shrinking section 152 should not be too long, otherwise the air pressure will be too high and the air cannot be discharged, and excessive noise will be generated.

[0127] In one embodiment, as shown in Figures 3-3 and 3-4, the second air-shrinking section 153 includes an air-concentrating section 154, which is located at the end of the second air-shrinking section 153 away from the braking assembly. The air-concentrating section 154 is used to reduce the cross-section. Furthermore, the degree to which the air-concentrating section 154 reduces the cross-section of the second air-shrinking section 153 increases along the direction away from the braking assembly. At the end of the second air-shrinking section 153 away from the braking assembly, the airflow is reduced compared to the portion closer to the braking assembly, which can easily affect the airflow volume and airflow distance. By providing the air-concentrating section 154, the airflow is pressurized, making the airflow more uniform.

[0128] It should be understood that the second air-shrinking section 153 is provided with the air-gathering part 154, reflecting the characteristic that the cross-section of the second air-shrinking section 153 is smaller than that of the first air-shrinking section 152. In addition, in other embodiments, other air-gathering structures can be provided at other locations of the second air-shrinking section 153 to further ensure uniform airflow at all points of the air outlet 12.

[0129] The housing 1 has an inner surface 1A and an outer surface 1B. The air outlet 12 is defined by the inner surface 1A and the outer surface 1B. The inner surface 1A and the outer surface 1B are spaced apart at the air outlet 12, or are close to or overlap each other. The braking assembly is housed in the fixed cavity 14, thus making the portable fan safer. The air outlet 12, defined by the inner surface 1A and the outer surface 1B of the housing 1, provides a strong, smooth, and uniform airflow, resulting in a good user experience.

[0130] In one embodiment, as shown in Figures 3-5 to 3-7, the air outlet 12 has an outlet 121. At the outlet 121 of the air outlet 12, the distance between the inner surface 1A and the outer surface 1B is 1-5mm, which facilitates the airflow to be ejected from the outlet 121 of the air outlet 12, resulting in a stronger airflow.

[0131] In one embodiment, as shown in Figures 3-3 to 3-6, the housing 1 includes a first wall 1a and a second wall 1b, which are separately formed and then assembled. A first side of the first wall 1a is closedly connected to a first side of the second wall 1b, and a second side of the first wall 1a is opposite to and spaced apart from a second side of the second wall 1b. The outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b define the air outlet 12. In this embodiment, the first and second sides of the first wall 1a extend in the same direction, and the second side of the first wall 1a extends beyond the first side of the first wall 1a; the first and second sides of the second wall 1b extend in the same direction, and the second side of the second wall 1b extends beyond the first side of the second wall 1b. The depth of the air outlet 12 is 15-23 mm. An air outlet 12 with a suitable depth can better rectify the airflow, reduce noise, and avoid turbulence.

[0132] In one embodiment, as shown in Figures 3-1, 3-2, 3-5, and 3-7, the air outlet 12 is disposed on the second air-contracting section 153, and the air outlet 12 covers the entire length of the second air-contracting section 153. The inner surface 1A of the first wall 1a and the inner surface 1A of the second wall 1b define the second air-contracting section 153. Since the air outlet 12 covers the entire length of the second air-contracting section 153, the second air-contracting section 153 is relatively long, and the corresponding air outlet 12 is also relatively long, resulting in a large air outlet range.

[0133] In one embodiment, as shown in Figures 3-3, 3-5, 3-6, and 3-7, the portable fan further includes a plurality of guide members 151. These guide members 151 are spaced apart along the length of the air duct 15. The guide members 151 guide the airflow generated by the braking assembly toward the air outlet 12. Each guide member 151 simultaneously abuts against both the first wall 1a and the second wall 1b. By providing the guide members 151, the airflow is rectified and guided, reducing noise and avoiding turbulence. It should be understood that the outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b may be spaced apart to define the air outlet 12; alternatively, at least a portion of the outer surface 1B of the first wall 1a and the inner surface 1A of the second wall 1b may not be spaced apart, i.e., they may overlap. The guide members 151 then spread out the overlapping portion, thereby defining the air outlet 12. In this embodiment, the guide 151 is integrally formed from the inner surface 1A of the second wall 1b, and the outer surface 1B of the first wall 1a has a plurality of grooves (unlabeled, the same below), and the guide 151 abuts against the grooves.

[0134] In one embodiment, as shown in Figures 3-3, 3-5, 3-6, and 3-7, an air intake 1d is also provided on one side of the air outlet 12. Air from outside the portable fan is drawn in by the airflow from the air outlet 12 through the air intake 1d. The housing 1 also includes a third wall 1c, which is located on the outer side of the second side of the second wall 1b. The third wall 1c is sheet-like, and is spaced apart from the second side of the second wall 1b to form the air intake 1d. Providing the air intake 1d on one side of the air outlet 12 allows for the attraction of external natural airflow in addition to the air generated by the braking assembly, creating a larger but equally smooth and uniform airflow together with the air from the air outlet 12, resulting in a better user experience. The air intake 1d extends parallel to the air outlet 12, and the air intake 1d and the air outlet 12 are arranged side-by-side along the length direction, further enhancing the airflow effect.

[0135] In one embodiment, as shown in Figures 3-3, 3-5, 3-6, and 3-7, the distance between the second side of the third wall 1c and the second side of the second wall 1b is 2.7-3.1 mm, and the distance between the second side of the third wall 1c and the second side of the first wall 1a is 6.6-12.6 mm. The width of the air intake 1d is also small, allowing air to be ejected with greater force. The outer surface 1B of the second side of the first wall 1a is formed with a Coanda surface, and the air outlet 12 is arranged to guide airflow onto the Coanda surface.

[0136] In one embodiment, as shown in Figures 3-3, 3-5, 3-6, and 3-7, one side of the third wall 1c extends in the same direction as the second side of the second wall 1b, and this side extends beyond the second side of the second wall 1b; the other side of the third wall 1c extends in the same direction as the second side of the first wall 1a, and this side does not extend beyond the second side of the first wall 1a. The shallow depth of the air intake 1d facilitates the airflow from the air outlet 12 drawing in external airflow through the air intake 1d. Furthermore, since one side of the third wall 1c extends beyond the second side of the second wall 1b, the third wall 1c can better guide the airflow, resulting in a smoother and more uniform airflow between the air outlet 12 and the air intake 1d.

[0137] In one embodiment, as shown in Figures 3-1 to 3-3, the length of the air inlet cavity 13 is 20-30 mm, and the length of the air duct 15 is 2-6 times the length of the air inlet cavity 13. The maximum cross-sectional area of ​​the air duct 15 is smaller than the minimum cross-sectional area of ​​the air inlet cavity 13, the maximum cross-sectional area of ​​the fixed cavity 14 is less than or equal to the minimum cross-sectional area of ​​the air inlet cavity 13, and the minimum cross-sectional area of ​​the fixed cavity 14 is greater than or equal to the maximum cross-sectional area of ​​the air duct 15. The cross-sections of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 decrease along their lengths, and the transitions between adjacent air inlets 13, fixed cavities 14, and air ducts 15 are smooth. The air inlet cavity 13 is short in length but has a large cross-section, which is beneficial for air intake and airflow guidance, increasing the air intake volume. Furthermore, the air inlet cavity 13 effectively avoids turbulence and noise caused by direct contact between external airflow and the braking assembly. The cross-section of the air duct 15 is small, and the air generated by the braking component is pressurized and concentrated in the air duct 15 to enhance the air outlet effect; the length of the air duct 15 is long, which can increase the air outlet range and improve the blowing experience.

[0138] In one embodiment, as shown in Figures 3-1 to 3-3, the portion of the housing 1 within the fixing cavity 14 is cylindrical, with a diameter of 28-35 mm and a length of 30-40 mm. The smaller diameter of the fixing cavity 14 allows for a smaller overall cross-section of the housing 1, resulting in a relatively slender and symmetrical neck fan that is easy to carry. The smaller length of the fixing cavity 14 also allows for a more reasonable design of the length of the air duct 15.

[0139] In one embodiment, as shown in Figures 3-2, 3-3, 3-8, and 3-9, the braking assembly includes a motor 2 and a fan 3. The motor 2 includes a cylinder 21, a stator assembly 22, and a rotor assembly 23. The motor 2 is a three-phase high-speed motor 2, which can provide high-speed and stable rotational speed, improving the airflow effect. At least a portion of the fan 3 is disposed within the cylinder 21. In this embodiment, the entire fan 3 is disposed within the cylinder 21. Therefore, the braking assembly has a compact and reasonable structure, and occupies a relatively short length of the cavity.

[0140] In one embodiment, as shown in Figures 3-2, 3-3, 3-8, and 3-9, the braking assembly further includes a buffer sleeve 33 disposed outside the cylinder 21. The buffer sleeve 33 includes an annular portion 331 and a plurality of protrusions 332 spaced around the outer surface 1B of the annular portion 331. When the braking assembly is received in the fixed cavity 14, at least a portion of the plurality of protrusions 332 is compressed, thereby the braking assembly can be securely fixed in the fixed cavity 14. The buffer sleeve 33 provides the braking assembly with strong friction and shock absorption capacity, effectively reducing the noise generated by the braking assembly.

[0141] In one embodiment, as shown in Figures 3-2, 3-3, 3-8, and 3-9, a first limiting part 17 is provided between the fixed cavity 14 and the air inlet cavity 13, and a second limiting part 18 is provided between the fixed cavity 14 and the air duct 15. The first limiting part 17 and the second limiting part 18 together limit the braking assembly. The buffer sleeve 33 also includes a edging part 333 connecting the two ends of the buffer sleeve 33. The edging part 333 at one end isolates and buffers the end of the cylinder 21 and the first limiting part 17, and the edging part 333 at the other end isolates and buffers the end of the cylinder 21 and the second limiting part 18. The edging part 333 further provides the braking assembly with buffering and shock absorption capabilities, further reducing the noise generated by the braking assembly. Furthermore, the cooperation of the first limiting part 17, the second limiting part 18, and the edge parts 333 at both ends further limits the axial movement of the braking assembly. Therefore, the braking assembly is firmly fixed in the fixing cavity 14, and the braking assembly can generate air stably, continuously, and with low noise. The material of the buffer sleeve 33 can be silicone, foam, or other materials with cushioning capabilities, without limitation. Of course, in other embodiments, the braking assembly may not have the buffer sleeve 33.

[0142] In one embodiment, as shown in Figures 3-2 to 3-6, the inner wall of the first air-shrinking section 152 extends from the free edge of the second limiting portion 18 toward the second air-shrinking section 153, and the cross-sectional area of ​​the first air-shrinking section 152 gradually decreases along its length away from the braking assembly. The smooth transition from the second limiting portion 18 to the starting point of the first air-shrinking section 152 helps reduce eddies caused by the reduced cross-sectional area, allowing the airflow to flow smoothly toward the second air-shrinking section 153 and reducing noise. Of course, in other embodiments, the inner wall of the first air-shrinking section 152 may not necessarily extend from the free edge of the second limiting portion 18 toward the second air-shrinking section 153, as long as the inner wall of the first air-shrinking section 152 can transition smoothly, allowing for smooth airflow and reduced noise.

[0143] In one embodiment, as shown in Figures 3-2, 3-3, 3-8, and 3-9, the cylindrical body 21 includes an outer ring portion 211, an inner ring portion 212, and a plurality of connecting blades 213 connecting the outer ring portion 211 and the inner ring portion 212. The inner ring portion 212 is located on the side of the outer ring portion 211 near the air duct 15, and the inner ring portion 212 protrudes slightly towards the air duct 15. This allows for a larger space on the side of the outer ring portion 211 facing the air inlet cavity 13 to accommodate other structures, resulting in a reasonable spatial layout within the cylindrical body 21. A base plate 214 is provided within the inner ring portion 212, and a hollow shaft cylinder 215 extends axially from the base plate 214 towards the air inlet cavity 13. The rotor assembly 23 includes a rotating shaft 231, a bearing 232, and a magnetic ring 233. The rotating shaft 231 and at least one bearing 232 are disposed within the shaft sleeve 215. In this embodiment, the number of bearings 232 is two, with both bearings 232 disposed within the shaft sleeve 215. Alternatively, one of the two bearings 232 may be disposed within the shaft sleeve 215, and the other may be disposed outside the shaft sleeve 215, as long as a stable fit between the rotating shaft 231 and the shaft sleeve 215 is ensured. The stator assembly 22 is disposed radially outside the rotating shaft 231 and the shaft sleeve 215, and the magnetic ring 233 is disposed radially outside the stator assembly 22. The fan 3 is disposed on the side of the outer ring portion 211 near the air inlet cavity 13, and the fan 3 is fixed to the rotating shaft 231.

[0144] In one embodiment, as shown in Figures 3-2, 3-3, 3-8, and 3-9, the rotor assembly 23 further includes a housing 234, which is fitted around the magnetic ring 233 and tightly fitted with the rotating shaft 231. The fan 3 is fixed to the rotating shaft 231, and the fan 3 and the motor 2 are coaxially arranged. The stator assembly 22 generates a magnetic field, causing the magnetic ring 233 and the housing 234 to rotate. The housing 234 drives the rotating shaft 231 and the fan 3 to rotate simultaneously. This eliminates the need for additional transmission devices for the motor 2 and the fan 3, effectively improving the transmission efficiency of the neck fan.

[0145] In one embodiment, as shown in Figures 3-2, 3-3, 3-8, and 3-9, the fan 3 includes a hub 31 and a plurality of blades 32 spaced around the outside of the hub 31. The difference between any two of the diameter of the maximum cross-section of the hub 31, the diameter of the housing 234, and the diameter of the inner ring 212 is less than 2 mm. The airflow generated by the plurality of blades 32 can smoothly pass through the area between the housing 234 and the outer ring 211, and the area between the inner ring 212 and the outer ring 211, and be directed towards the air duct 15. The hub 31, the housing 234, and the inner ring 212 are axially aligned and have similar diameters, resulting in a compact structure for the motor 2 and the fan 3.

[0146] In one embodiment, as shown in Figures 3-2, 3-3, 3-8, and 3-9, the inner ring portion 212 forms a receiving portion 216 on the side of the substrate 214 facing the air duct 15. The drive plate 24 is disposed in the receiving portion 216, and the control member 42 is electrically connected to the drive plate 24. The receiving portion 216 is directly formed by the inner ring portion 212, that is, the drive plate 24 is directly snapped into the inner ring portion 212 and is disposed facing the air duct 15, which facilitates the connection of the drive plate 24 with other electrical components. The substrate 214 also has a notch, through which wires are electrically connected to the stator assembly 22 and the drive plate 24.

[0147] In one embodiment, as shown in Figures 3-2, 3-3, 3-8, and 3-9, two of the two free ends of the housing 1 are provided with receiving cavities 16. The neck fan also includes a control assembly, which includes a power supply component 41 that provides power to the braking assembly, and a control component 42 that controls the braking assembly. The power supply component 41 is electrically connected to the control component 42, and the control component 42 is electrically connected to the drive plate 24. The power supply component 41 and the control component 42 are housed in the receiving cavity 16, and the control component 42 includes a switch 43 and an interface 44 exposed outside the free end of the housing 1.

[0148] It should be understood that in this embodiment, the air inlet cavity 13, the fixing cavity 14, the air duct 15, and the receiving cavity 16 are sequentially arranged along the length direction of the housing 1. Of course, in other embodiments, the air inlet cavity 13, the fixing cavity 14, and the air duct 15 may also be sequentially arranged along the length direction of the housing 1, and the receiving cavity 16 may be disposed on one side of the air inlet cavity 13 or on one side of the air duct 15.

[0149] In one embodiment, as shown in Figures 3-1 to 3-5, the portable fan is a neck-mounted fan. The housing 1 is symmetrically provided with two air inlet chambers 13, two fixing chambers 14, and two air ducts 15. Two braking components are respectively disposed in the two fixing chambers 14. When worn with the air outlet 12 facing upwards, the air generated by the braking components blows towards the user's head, and the air intake 1d can accelerate the airflow near the neck, thus having a sweat-absorbing effect. Alternatively, when worn with the air outlet 12 facing downwards, the air in the braking components blows towards the user's neck, and the air intake 1d can accelerate the airflow near the head, thus having a sweat-absorbing effect. In other embodiments, the portable fan can also be a handheld fan, a clip-on fan, a versatile fan, or other portable fans, and is not limited to these examples.

[0150] Option 4

[0151] In one embodiment, as shown in Figures 4-1 and 4-2, a schematic diagram of a portable fan according to this application is presented. The portable fan includes an air outlet component 100, which includes a housing 1, a braking component, and a control component 4. The housing 1 includes a cavity and an air inlet 11 and an air outlet 12 communicating with the cavity. The cavity is provided with an air inlet chamber 13, a fixed chamber 14, an air duct 15, and a receiving chamber 16 along its length. The air inlet 11 communicates with the air inlet chamber 13, and the air outlet 12 communicates with the air duct 15. The braking component is housed in the fixed chamber 14 and is used to draw air in from the air inlet 11, through the air inlet chamber 13, the braking component, and the air duct 15, and then blow it out from the air outlet 12. The control component 4 is housed in the receiving chamber 16. The control component 4 includes a power supply component 41 that provides power to the braking component, and a control component 42 that controls the braking component. The power supply component 41 is electrically connected to the control component 42, and the control component 42 is electrically connected to the braking component. By arranging the air inlet cavity 13, the fixed cavity 14, the air duct 15, and the receiving cavity 16 along the length direction, the braking component is housed in the fixed cavity 14, and the control component is housed in the receiving cavity 16. The reasonable internal space design helps to make the air outlet component slender and symmetrical, ensuring user comfort.

[0152] It should be understood that in this embodiment, the air inlet cavity 13, the fixed cavity 14, the air duct 15, and the receiving cavity 16 are sequentially arranged along the length direction of the cavity. Of course, in other embodiments, the air inlet cavity 13, the fixed cavity 14, and the air duct 15 may also be sequentially arranged along the length direction of the cavity, and the receiving cavity 16 may be located on one side of the air inlet cavity 13 or on one side of the air duct 15.

[0153] In one embodiment, as shown in Figures 4-1 to 4-3, the length of the air inlet cavity 13 is 20-30 mm, and the length of the air duct 15 is 4-6 times the length of the air inlet cavity 13. The maximum cross-sectional area of ​​the air duct 15 is smaller than the minimum cross-sectional area of ​​the air inlet cavity 13, the maximum cross-sectional area of ​​the fixed cavity 14 is less than or equal to the minimum cross-sectional area of ​​the air inlet cavity 13, and the minimum cross-sectional area of ​​the fixed cavity 14 is greater than or equal to the maximum cross-sectional area of ​​the air duct 15. The cross-sections of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 decrease along their lengths, and the transitions between adjacent air inlets 13, fixed cavities 14, and air ducts 15 are smooth. The air inlet cavity 13 is short in length but has a large cross-section, which is beneficial for air intake and airflow guidance, increasing the air intake volume. Furthermore, the air inlet cavity 13 effectively avoids turbulence and noise caused by direct contact between external airflow and the braking assembly. The cross-section of the air duct 15 is small, and the air generated by the braking component is pressurized and concentrated in the air duct 15 to enhance the air outlet effect; the length of the air duct 15 is long, which can increase the air outlet range and improve the blowing experience.

[0154] In one embodiment, as shown in Figures 4-1 to 4-3, the portion of the housing 1 within the fixing cavity 14 is cylindrical, with a diameter of 28-35 mm and a length of 30-40 mm. The smaller diameter of the fixing cavity 14 allows for a smaller overall cross-section of the housing 1, resulting in a relatively slender and well-proportioned portable fan that is easy to carry. The smaller length of the fixing cavity 14 also allows for a more reasonable design of the length of the air duct 15.

[0155] In one embodiment, as shown in Figures 4-2 to 4-4, the braking assembly includes a motor 2 and a fan 3. The motor 2 includes a cylinder 21, a stator assembly 22, and a rotor assembly 23. The motor 2 is a three-phase high-speed motor, which can provide high-speed and stable rotational speed, improving the airflow effect. At least a portion of the fan 3 is disposed within the cylinder 21. In this embodiment, the entire fan 3 is disposed within the cylinder 21, thus the braking assembly has a compact and reasonable structure, occupying a shorter length of the cavity. Of course, in other embodiments, a portion of the fan 2 may protrude from the cylinder 21.

[0156] In one embodiment, as shown in Figures 4-2 to 4-4, the braking assembly further includes a buffer sleeve 33 disposed outside the cylinder 21. The buffer sleeve 33 includes an annular portion 331 and a plurality of protrusions 332 spaced around the outer surface of the annular portion 331. When the braking assembly is received in the fixed cavity 14, at least a portion of the plurality of protrusions 332 is compressed, thereby the braking assembly can be securely fixed in the fixed cavity 14. The buffer sleeve 33 provides the braking assembly with strong friction and shock absorption capacity, effectively reducing the noise generated by the braking assembly.

[0157] In one embodiment, as shown in Figures 4-2 to 4-4, a first limiting part 17 is provided between the fixed cavity 14 and the air inlet cavity 13, and a second limiting part 18 is provided between the fixed cavity 14 and the air duct 15. The buffer sleeve 33 also includes a wrapping part 333 connecting the two ends of the buffer sleeve 33. The wrapping part 333 at one end isolates and buffers the end of the cylinder 21 and the first limiting part 17, and the wrapping part 333 at the other end isolates and buffers the end of the cylinder 21 and the second limiting part 18. The wrapping part 333 further provides buffering and shock absorption capacity for the braking assembly, further reducing the noise generated by the braking assembly. In addition, the cooperation of the first limiting part 17, the second limiting part 18 and the wrapping parts 333 at both ends further limits the axial movement of the braking assembly. Therefore, the braking assembly is firmly fixed in the fixed cavity 14, and the braking assembly can generate air stably, continuously and with low noise. The material of the buffer sleeve 33 can be silicone, foam, or other materials with buffering capacity, without limitation. Of course, in other embodiments, the braking assembly may not have the buffer sleeve 33.

[0158] In one embodiment, as shown in Figures 4-4 and 4-5, the cylindrical body 21 includes an outer ring portion 211, an inner ring portion 212, and a plurality of connecting blades 213 connecting the outer ring portion 211 and the inner ring portion 212. The inner ring portion 212 is located on the side of the outer ring portion 211 near the air duct 15, and the inner ring portion 212 protrudes slightly towards the air duct 15. This allows for more space on the side of the outer ring portion 211 facing the air inlet cavity 13 to accommodate other structures, resulting in a reasonable spatial layout within the cylindrical body 21. A base plate 214 is provided within the inner ring portion 212, and a hollow shaft cylinder 215 extends axially from the base plate 214 towards the air inlet cavity 13. The rotor assembly 23 includes a rotating shaft 231, a bearing 232, and a magnetic ring 233. The rotating shaft 231 and at least one bearing 232 are disposed within the shaft sleeve 215. In this embodiment, the number of bearings 232 is two, with both bearings 232 disposed within the shaft sleeve 215. Alternatively, one of the two bearings 232 may be disposed within the shaft sleeve 215, and the other may be disposed outside the shaft sleeve 215, as long as a stable fit between the rotating shaft 231 and the shaft sleeve 215 is ensured. The stator assembly 22 is disposed radially outside the rotating shaft 231 and the shaft sleeve 215, and the magnetic ring 233 is disposed radially outside the stator assembly 22. The fan 3 is disposed on the side of the outer ring portion 211 near the air inlet cavity 13, and the fan 3 is fixed to the rotating shaft 231.

[0159] In one embodiment, as shown in Figures 4-4 and 4-5, the rotor assembly 23 further includes a housing 234, which is fitted around the magnetic ring 233 and tightly fitted with the rotating shaft 231. The fan 3 is fixed to the rotating shaft 231, and the fan 3 and the motor 2 are coaxially arranged. The stator assembly 22 generates a magnetic field, causing the magnetic ring 233 and the housing 234 to rotate. The housing 234 drives the rotating shaft 231 and the fan 3 to rotate simultaneously. This eliminates the need for a separate transmission device for the motor 2 and the fan 3, effectively improving the transmission efficiency of the portable fan.

[0160] In one embodiment, as shown in Figures 4-4 and 4-5, the fan 3 includes a hub 31 and a plurality of blades 32 spaced around the outside of the hub 31. The difference between any two of the diameter of the maximum cross-section of the hub 31, the diameter of the housing 234, and the diameter of the inner ring 212 is less than 2 mm. The air generated by the plurality of blades 32 can smoothly pass through the area between the housing 234 and the outer ring 211, and the area between the inner ring 212 and the outer ring 211, and be blown towards the air duct 15. The hub 31, the housing 234, and the inner ring 212 are axially arranged, and their diameters are similar, resulting in a compact structure for the motor 2 and the fan 3. In this embodiment, the fan 3 is a diagonal-flow fan, and the hub 31 increases radially from the air inlet 13 towards the air duct 15, with its outer surface curved outwards, which helps to increase wind pressure and enhance wind efficiency. In other embodiments, the fan 3 may also be an axial flow fan.

[0161] In one embodiment, as shown in Figures 4-4 and 4-5, the inner ring portion 212 forms a receiving portion 216 on the side of the substrate 214 facing the air duct 15. The drive plate 24 is disposed in the receiving portion 216, and the control member 42 is electrically connected to the drive plate 24. The receiving portion 216 is directly formed by the inner ring portion 212, that is, the drive plate 24 is directly snapped into the inner ring portion 212 and is positioned facing the air duct 15, which facilitates the connection of the drive plate 24 with other electrical components. The substrate 214 also has a notch (not shown, the same below), through which wires are electrically connected to the stator assembly 22 and the drive plate 24.

[0162] In one embodiment, as shown in Figures 4-1 to 4-3, the portable fan is a neck fan, comprising two air outlet components 100. Two receiving cavities 16 are respectively located at the first end 1A of the two housings 1, where the first end 1A is a free end. Two air inlet cavities 13 are respectively located at the second end 1B of the two housings 1, where the second end 1B is a connecting end. An air inlet 11 penetrates the end face and / or side face of the second end 1B. The control component 42 is closer to the first end 1A than the power supply component 41. The control component 42 includes a switch 43 or interface 44 exposed outside the first end 1A. The two air outlet components 100 are pivotally connected, with the connection point located at the junction of the second end 1B and the side face of the housing 1. The user can rotate the two air outlet components 100 outwards for easy wearing or removal; the user can also rotate the two air outlet components 100 inwards to secure them around the neck and prevent them from slipping off. Furthermore, the two air outlet components 100 are connected at a location close to the user's neck. Therefore, during the outward opening and inward closing of the two air outlet components 100, they will not pinch the user's neck, making the user safer. In other embodiments, the two air outlet components 100 may also be connected at the second end 1B of the housing 1, or at the side of the housing 1 near the second end 1B. In other embodiments, the two air outlet components 100 may also be fixedly connected.

[0163] Of course, it should be understood that in other embodiments, the portable fan may have only one air outlet component 100, and the housing 1 may have two air inlet chambers 13, two fixed chambers 14, two air ducts 15, and two receiving chambers 16 symmetrically arranged inside. Two braking components are respectively disposed in the two fixed chambers 14, and two control components 4 are respectively disposed in the two receiving chambers 16. Furthermore, in other embodiments, the portable fan may be a handheld fan, a clip-on fan, a versatile fan, or other portable fan, and is not limited to this example.

[0164] Option 5

[0165] In one embodiment, as shown in Figures 5-1 and 5-2, a schematic diagram of a portable fan according to this application is presented. The portable fan includes an air outlet component 100, which includes a housing 1, a braking component, and a control component. The housing 1 includes a cavity and an air inlet 11 and a first air outlet 121 communicating with the cavity. The cavity is provided with an air inlet chamber 13, a fixed chamber 14, an air duct 15, and a receiving chamber 16 along its length. The air inlet 11 communicates with the air inlet chamber 13, and the first air outlet 121 communicates with the air duct 15. The braking component is housed in the fixed chamber 14 and is used to draw air in from the air inlet 11, through the air inlet chamber 13, the braking component, and the air duct 15, and then blow it out from the first air outlet 121. The control component includes a power supply component 41 that provides power to the braking component and a control component 42 that controls the braking component. The power supply component 41 is housed in the receiving chamber 16, and the control component 42 is housed in the air inlet chamber 13. The power supply component 41 is electrically connected to the control component 42, and the control component 42 is electrically connected to the braking component. By arranging the air inlet cavity 13, the fixed cavity 14, the air duct 15, and the receiving cavity 16 along the length direction, the braking component is housed in the fixed cavity 14, and the control component is housed in the receiving cavity 16. The reasonable internal space design helps to make the air outlet component slender and symmetrical, ensuring user comfort.

[0166] It should be understood that in this embodiment, the air inlet cavity 13, the fixed cavity 14, the air duct 15, and the receiving cavity 16 are sequentially arranged along the length direction of the cavity. Of course, in other embodiments, the air inlet cavity 13, the fixed cavity 14, and the air duct 15 may also be sequentially arranged along the length direction of the cavity, and the receiving cavity 16 may be located on one side of the air inlet cavity 13 or on one side of the air duct 15.

[0167] In one embodiment, as shown in Figures 5-1 and 5-2, the length of the air inlet cavity 13 is 20-30 mm, and the length of the air duct 15 is 4-6 times the length of the air inlet cavity 13. The maximum cross-sectional area of ​​the air duct 15 is smaller than the minimum cross-sectional area of ​​the air inlet cavity 13, the maximum cross-sectional area of ​​the fixed cavity 14 is less than or equal to the minimum cross-sectional area of ​​the air inlet cavity 13, and the minimum cross-sectional area of ​​the fixed cavity 14 is greater than or equal to the maximum cross-sectional area of ​​the air duct 15. The cross-sections of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 decrease along their lengths, and the transitions between adjacent air inlets 13, fixed cavities 14, and air ducts 15 are smooth. The air inlet cavity 13 is short in length but has a large cross-section, which is beneficial for air intake and airflow guidance, increasing the air intake volume. Furthermore, the air inlet cavity 13 effectively avoids turbulence and noise caused by direct contact between external airflow and the braking assembly. The cross-section of the air duct 15 is small, and the air generated by the braking component is pressurized and concentrated in the air duct 15 to enhance the air outlet effect; the length of the air duct 15 is long, which can increase the air outlet range and improve the blowing experience.

[0168] In one embodiment, as shown in Figures 5-1 and 5-2, the portion of the housing 1 within the fixing cavity 14 is cylindrical, with a diameter of 28-35 mm and a length of 30-40 mm. The smaller diameter of the fixing cavity 14 allows for a smaller overall cross-section of the housing 1, resulting in a relatively slender and well-proportioned portable fan that is easy to carry. The smaller length of the fixing cavity 14 also allows for a more reasonable design of the length of the air duct 15.

[0169] In one embodiment, as shown in Figures 5-2 to 5-4, the cavity further includes an extension 19. The extension 19 is arranged side-by-side with the receiving cavity 16. The maximum cross-sectional diameter of the extension 19 and the receiving cavity 16 is less than 36.5 mm. Therefore, even though the extension 19 and the receiving cavity 16 are arranged side-by-side, their cross-sectional areas are still relatively small, and the overall volume of the portable fan remains small. The extension 19 communicates with the air duct 15, and the housing 1 also has a second air outlet 122 communicating with the extension 19. The braking assembly draws air in through the air inlet 11. Part of the air passes through the air inlet cavity 13, the braking assembly, and the air duct 15, and is then blown out from the first air outlet 121; another part of the air passes through the air inlet cavity 13, the fixing cavity 14, the air duct 15, and the extension 19, and is then blown out from the second air outlet 122. By providing the extension 19 and the second air outlet 122, the airflow range of the portable fan is extended, improving the user experience.

[0170] In one embodiment, as shown in Figures 5-2, 5-4, and 5-5, the braking assembly includes a motor 2 and a fan 3. The motor 2 includes a cylinder 21, a stator assembly 22, and a rotor assembly 23. The motor 2 is a three-phase high-speed motor 2, which can provide high-speed and stable rotational speed, improving the airflow effect. At least a portion of the fan 3 is disposed within the cylinder 21. In this embodiment, the entire fan 3 is disposed within the cylinder 21. Therefore, the braking assembly has a compact and reasonable structure, and occupies a relatively short length of the cavity.

[0171] In one embodiment, as shown in Figures 5-2, 5-4, and 5-5, the braking assembly further includes a buffer sleeve 33 disposed outside the cylinder 21. The buffer sleeve 33 includes an annular portion 331 and a plurality of protrusions 332 spaced around the outer surface of the annular portion 331. When the braking assembly is received in the fixed cavity 14, at least a portion of the plurality of protrusions 332 is compressed, thereby the braking assembly can be securely fixed in the fixed cavity 14. The buffer sleeve 33 provides the braking assembly with strong friction and shock absorption capacity, effectively reducing the noise generated by the braking assembly.

[0172] In one embodiment, as shown in Figures 5-2, 5-4, and 5-5, a first limiting part 17 is provided between the fixed cavity 14 and the air inlet cavity 13, and a second limiting part 18 is provided between the fixed cavity 14 and the air duct 15. The buffer sleeve 33 also includes a wrapping part 333 connecting the two ends of the buffer sleeve 33. The wrapping part 333 at one end isolates and buffers the end of the cylinder 21 and the first limiting part 17, and the wrapping part 333 at the other end isolates and buffers the end of the cylinder 21 and the second limiting part 18. The wrapping part 333 further provides buffering and shock absorption capacity for the braking assembly, further reducing the noise generated by the braking assembly. In addition, the cooperation of the first limiting part 17, the second limiting part 18, and the wrapping parts 333 at both ends further limits the axial movement of the braking assembly. Therefore, the braking assembly is firmly fixed in the fixed cavity 14, and the braking assembly can generate air stably, continuously, and with low noise. The buffer sleeve 33 can be made of silicone, foam, or other materials with cushioning capabilities, without limitation. Of course, in other embodiments, the braking assembly may not have the buffer sleeve 33.

[0173] In one embodiment, as shown in Figures 5-2, 5-4, 5-5, and 5-6, the cylindrical body 21 includes an outer ring portion 211, an inner ring portion 212, and a plurality of connecting blades 213 connecting the outer ring portion 211 and the inner ring portion 212. The inner ring portion 212 is located on the side of the outer ring portion 211 near the air duct 15, and the inner ring portion 212 protrudes slightly towards the air duct 15. This allows for a larger space on the side of the outer ring portion 211 facing the air inlet cavity 13 to accommodate other structures, resulting in a reasonable spatial layout within the cylindrical body 21. A base plate 214 is provided within the inner ring portion 212, and a hollow shaft cylinder 215 extends axially from the base plate 214 towards the air inlet cavity 13. The rotor assembly 23 includes a rotating shaft 231, a bearing 232, and a magnetic ring 233. The rotating shaft 231 and at least one bearing 232 are disposed within the shaft sleeve 215. In this embodiment, the number of bearings 232 is two, with both bearings 232 disposed within the shaft sleeve 215. Alternatively, one of the two bearings 232 may be disposed within the shaft sleeve 215, and the other may be disposed outside the shaft sleeve 215, as long as a stable fit between the rotating shaft 231 and the shaft sleeve 215 is ensured. The stator assembly 22 is disposed radially outside the rotating shaft 231 and the shaft sleeve 215, and the magnetic ring 233 is disposed radially outside the stator assembly 22. The fan 3 is disposed on the side of the outer ring portion 211 near the air inlet cavity 13, and the fan 3 is fixed to the rotating shaft 231.

[0174] In one embodiment, as shown in Figures 5-4 to 5-6, the rotor assembly 23 further includes a housing 234, which is fitted around the magnetic ring 233 and tightly fitted with the rotating shaft 231. The fan 3 is fixed to the rotating shaft 231, and the fan 3 and the motor 2 are coaxially arranged. The stator assembly 22 generates a magnetic field, causing the magnetic ring 233 and the housing 234 to rotate. The housing 234 drives the rotating shaft 231 and the fan 3 to rotate simultaneously. This eliminates the need for additional transmission devices on the motor 2 and the fan 3, effectively improving the transmission efficiency of the portable fan.

[0175] In one embodiment, as shown in Figures 5-4 to 5-6, the fan 3 includes a hub 31 and a plurality of blades 32 spaced around the outside of the hub 31. The difference between any two of the diameter of the maximum cross-section of the hub 31, the diameter of the housing 234, and the diameter of the inner ring 212 is less than 2 mm. The air generated by the plurality of blades 32 can be smoothly blown towards the air duct 15 through the area between the housing 234 and the outer ring 211, and the area between the inner ring 212 and the outer ring 211. The hub 31, the housing 234, and the inner ring 212 are axially arranged and have similar diameters, resulting in a compact structure for the motor 2 and the fan 3.

[0176] In one embodiment, as shown in Figures 5-4 to 5-6, the inner ring portion 212 forms a receiving portion 216 on the side of the substrate 214 facing the air duct 15. The drive plate 24 is disposed in the receiving portion 216, and the control member 42 is electrically connected to the drive plate 24. The receiving portion 216 is directly formed by the inner ring portion 212, that is, the drive plate 24 is directly snapped into the inner ring portion 212 and is disposed facing the air duct 15, which facilitates the connection of the drive plate 24 with other electrical components. The substrate 214 also has a notch, through which wires are electrically connected to the stator assembly 22 and the drive plate 24.

[0177] In one embodiment, as shown in Figures 5-3 to 5-6, the portable fan is a neck fan, and the portable fan includes two air outlet components 100. Two air inlet chambers 13 are respectively located at the first end 1A of the two housings 1, where the first end 1A is a free end. Two receiving cavities 16 are located at the second end 1B of the two housings 1, where the second end 1B is a connecting end. Further, the housing 1 includes a first housing 1a and a second housing 1b. The air inlet chamber 13 is located in the first housing 1a, and the fixing cavity 14, the air duct 15, and the receiving cavity 16 are located in the second housing 1b. The first housing 1a and the second housing 1b are detachably connected. The length of the first housing 1a is 30-38 mm. The control component 42 is located at the free end of the first housing 1a. The control component 42 also includes a switch 43 or an interface 44 exposed outside the free end of the first housing 1a. The air inlet 11 penetrates through the side of the first housing 1a.

[0178] In this embodiment, as shown in Figures 5-2, 5-4, 5-5, and 5-6, the two air outlet components 100 are pivotally connected, and the connection point is located at the junction of the second end 1B and the side of the housing 1. The user can rotate the two air outlet components 100 outwards for easy wearing or removal; the user can also close the two air outlets inwards to secure them around the neck and prevent them from slipping off. Since the connection point is located near the neck, the two air outlet components 100 will not pinch the user's neck during rotation and closure, making them safer to use. In other embodiments, the connection point may also be the second end 1B of the housing 1, or the side of the housing 1 near the second end 1B. In other embodiments, the two air outlet components 100 may also be fixedly connected.

[0179] In this embodiment, when the portable fan is worn around the user's neck, the first air outlet 121 blows towards the user's head, and the second air outlet 122 is simultaneously located on the upper and lower sides of the extension 19, so that the second air outlet 122 can blow towards both the user's head and neck at the same time; or the first air outlet 121 blows towards the user's neck, and the second air outlet 122 is simultaneously located on the upper and lower sides of the extension 19, so that the second air outlet 122 can blow towards both the user's head and neck at the same time.

[0180] Of course, it should be understood that in other embodiments, the portable fan may have only one air outlet component 100, and the housing 1 may have two air inlet chambers 13, two fixed chambers 14, two air ducts 15, and two receiving chambers 16 symmetrically arranged inside. Two braking components are respectively disposed in the two fixed chambers 14, and two control components are respectively disposed in the two receiving chambers 16. Furthermore, in other embodiments, the portable fan may be a handheld fan, a clip-on fan, a versatile fan, or other portable fan, and is not limited to this example.

[0181] Option Six

[0182] In one embodiment, as shown in Figures 6-1 and 6-2, which are schematic diagrams of the neck fan of this application, the neck fan is generally C-shaped or U-shaped. The neck fan includes a housing 1, a braking assembly, and a control assembly. The housing 1 has four fixed cavities 14, and air inlets 13 and air ducts 15 corresponding to both ends of each fixed cavity 14. Each air inlet 13 has an air inlet 11, and each air duct 15 has an air outlet 12. The neck fan has four braking assemblies, one of which is located in one fixed cavity 14. Each braking assembly draws air in from the corresponding air inlet 11, passes through the corresponding air inlet 13, the braking assembly, and the air duct 15, and then blows it out from the corresponding air outlet 12.

[0183] In one embodiment, as shown in Figures 6-1 to 6-3, the air inlet cavity 13, the fixed cavity 14, and the air duct 15 are defined as main structures 1A. The two main structures 1A on the left side of the housing 1 are arranged in opposite directions along the length of the housing 1, and the two main structures 1A on the right side of the housing 1 are also arranged in opposite directions along the length of the housing 1. In this embodiment, the opposite directions mean they are arranged adjacent to each other, and the two air ducts 15 are connected. Furthermore, in the main structures 1A located at the free end of the housing 1, the air inlet cavity 13 is closer to the free end of the housing 1 than the air duct 15. In another embodiment, as shown in Figures 6-5, the air duct 15 may be closer to the free end of the housing 1 than the air inlet cavity 13. In this embodiment, they are not arranged in the same direction, that is, they are arranged opposite each other, and the two air inlets are arranged adjacent to each other. In other embodiments, in one side of the main structure 1A, the air duct 15 may be closer to the free end of the housing 1 than the air inlet cavity 13, and in the other side of the main structure 1A, the air inlet cavity 13 may be closer to the free end of the housing 1 than the air duct 15.

[0184] In one embodiment, as shown in FIG6-6, the structure of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 is defined as a main structure 1A. The housing 1 has four main structures 1A. The two main structures 1A on the left side of the housing 1 are arranged in the same direction along the length of the housing 1, and the two main structures 1A on the right side of the housing 1 are arranged in the same direction along the length of the housing 1. Furthermore, in the main structures 1A located at the free end of the housing 1, the air duct 15 is closer to the free end of the housing 1 than the air inlet cavity 13. In another embodiment, as shown in FIG6-7, the air inlet cavity 13 may also be closer to the free end of the housing 1 than the air duct 15. In other embodiments, in one main structure 1A, the air duct 15 may be closer to the free end of the housing 1 than the air inlet cavity 13, and in the other main structure 1A, the air inlet cavity 13 may be closer to the free end of the housing 1 than the air duct 15.

[0185] In some embodiments, as shown in Figures 6-2 and 6-4, the housing 1 includes a first portion 1a on the left and a second portion 1b on the right, which are detachable. The first portion 1a and the second portion 1b are pivotally connected. In other embodiments, the first portion 1a and the second portion 1b may be fixedly connected. In one embodiment, as shown in Figure 6-4, a partition 1B is provided within the first portion 1a and the second portion 1b, which separates the two main structures 1A. Alternatively, the partition 1B may be provided in one of the first portion 1a and the second portion 1b, or neither the first portion 1a nor the second portion 1b may have the partition 1B.

[0186] In other embodiments, the housing 1 may include a first part 1a and a third part on the left, and a second part 1b and a fourth part on the right. The third part, the first part 1a, the second part 1b, and the fourth part are four detachably connected parts. Adjacent parts of the third part, the first part 1a, the second part 1b, and the fourth part may be fixedly or pivotally connected. Alternatively, at least two of the third part, the first part 1a, the second part 1b, and the fourth part may be detachably connected, and this connection may be fixed or pivotally connected.

[0187] In one embodiment, the housing 1 has three fixed cavities 14, and air inlets 13 and air ducts 15 corresponding to both ends of each fixed cavity 14. Three braking assemblies are correspondingly disposed in the three fixed cavities 14. Each braking assembly draws air in from the corresponding air inlet 11, passes through the corresponding air inlet 13, the braking assembly, and the air duct 15, and then blows it out from the corresponding air outlet 12. The structure of the air inlet 13, the fixed cavities 14, and the air duct 15 is defined as a main structure 1A. The housing 1 has at least one partition 1B, which is used to separate two adjacent main structures 1A.

[0188] In one embodiment, the housing 1 includes a first part 1a, a second part 1b, and a third part arranged along the length direction. The first part 1a, the second part 1b, and the third part are three detachable parts. Among the first part 1a, the second part 1b, and the third part, adjacent parts are fixedly connected or pivotally connected.

[0189] In one embodiment, as shown in Figures 6-1 to 6-3, the length of the air inlet cavity 13 is 20-30 mm, and the length of the air duct 15 is 2-6 times the length of the air inlet cavity 13. The maximum cross-sectional area of ​​the air duct 15 is smaller than the minimum cross-sectional area of ​​the air inlet cavity 13, the maximum cross-sectional area of ​​the fixed cavity 14 is less than or equal to the minimum cross-sectional area of ​​the air inlet cavity 13, and the minimum cross-sectional area of ​​the fixed cavity 14 is greater than or equal to the maximum cross-sectional area of ​​the air duct 15. The cross-sections of the air inlet cavity 13, the fixed cavity 14, and the air duct 15 decrease along their lengths, and the transitions between adjacent air inlets 13, fixed cavities 14, and air ducts 15 are smooth. The air inlet cavity 13 is short in length but has a large cross-section, which is beneficial for air intake and airflow guidance, increasing the air intake volume. Furthermore, the air inlet cavity 13 effectively avoids turbulence and noise caused by direct contact between external airflow and the braking assembly. The cross-section of the air duct 15 is small, and the air generated by the braking component is pressurized and concentrated in the air duct 15 to enhance the air outlet effect; the length of the air duct 15 is long, which can increase the air outlet range and improve the blowing experience.

[0190] In one embodiment, as shown in Figures 6-1 to 6-3, the portion of the housing 1 within the fixing cavity 14 is cylindrical, with a diameter of 28-35 mm and a length of 30-40 mm. The smaller diameter of the fixing cavity 14 allows for a smaller overall cross-section of the housing 1, resulting in a relatively slender and symmetrical neck fan that is easy to carry. The smaller length of the fixing cavity 14 also allows for a more reasonable design of the length of the air duct 15.

[0191] In one embodiment, as shown in Figures 6-2, 6-3, 6-9, and 6-10, the braking assembly includes a motor 2 and a fan 3. The motor 2 includes a cylinder 21, a stator assembly 22, and a rotor assembly 23. The motor 2 is a three-phase high-speed motor 2, which can provide high-speed and stable rotational speed, improving the airflow effect. At least a portion of the fan 3 is disposed within the cylinder 21. In this embodiment, the entire fan 3 is disposed within the cylinder 21. Therefore, the braking assembly has a compact and reasonable structure, and occupies a relatively short length of the cavity.

[0192] In one embodiment, as shown in Figures 6-3, 6-9, and 6-10, the braking assembly further includes a buffer sleeve 33 disposed outside the cylinder 21. The buffer sleeve 33 includes an annular portion 331 and a plurality of protrusions 332 spaced around the outer surface of the annular portion 331. When the braking assembly is received in the fixed cavity 14, at least a portion of the plurality of protrusions 332 is compressed, thereby the braking assembly can be securely fixed in the fixed cavity 14. The buffer sleeve 33 provides the braking assembly with strong friction and shock absorption capacity, effectively reducing the noise generated by the braking assembly.

[0193] In one embodiment, as shown in Figures 6-2, 6-3, 6-9, and 6-10, a first limiting part 17 is provided between the fixed cavity 14 and the air inlet cavity 13, and a second limiting part 18 is provided between the fixed cavity 14 and the air duct 15. The buffer sleeve 33 also includes a wrapping part 333 connecting the two ends of the buffer sleeve 33. The wrapping part 333 at one end isolates and buffers the end of the cylinder 21 and the first limiting part 17, and the wrapping part 333 at the other end isolates and buffers the end of the cylinder 21 and the second limiting part 18. The wrapping part 333 further provides buffering and shock absorption capacity for the braking assembly, further reducing the noise generated by the braking assembly. In addition, the cooperation of the first limiting part 17, the second limiting part 18, and the wrapping parts 333 at both ends further limits the axial movement of the braking assembly. Therefore, the braking assembly is firmly fixed in the fixed cavity 14, and the braking assembly can generate air stably, continuously, and with low noise. The buffer sleeve 33 can be made of silicone, foam, or other materials with cushioning capabilities, without limitation. Of course, in other embodiments, the braking assembly may not have the buffer sleeve 33.

[0194] In one embodiment, as shown in Figures 6-2, 6-9, and 6-10, the cylindrical body 21 includes an outer ring portion 211, an inner ring portion 212, and a plurality of connecting blades 213 connecting the outer ring portion 211 and the inner ring portion 212. The inner ring portion 212 is located on the side of the outer ring portion 211 near the air duct 15, and the inner ring portion 212 protrudes slightly towards the air duct 15. This allows for more space on the side of the outer ring portion 211 facing the air inlet cavity 13 to accommodate other structures, resulting in a reasonable spatial layout within the cylindrical body 21. A base plate 214 is provided within the inner ring portion 212, and a hollow shaft cylinder 215 extends axially from the base plate 214 towards the air inlet cavity 13. The rotor assembly 23 includes a rotating shaft 231, a bearing 232, and a magnetic ring 233. The rotating shaft 231 and at least one bearing 232 are disposed within the shaft sleeve 215. In this embodiment, the number of bearings 232 is two, with both bearings 232 disposed within the shaft sleeve 215. Alternatively, one of the two bearings 232 may be disposed within the shaft sleeve 215, and the other may be disposed outside the shaft sleeve 215, as long as a stable fit between the rotating shaft 231 and the shaft sleeve 215 is ensured. The stator assembly 22 is disposed radially outside the rotating shaft 231 and the shaft sleeve 215, and the magnetic ring 233 is disposed radially outside the stator assembly 22. The fan 3 is disposed on the side of the outer ring portion 211 near the air inlet cavity 13, and the fan 3 is fixed to the rotating shaft 231.

[0195] In one embodiment, as shown in Figures 6-9 and 6-10, the rotor assembly 23 further includes a housing 234, which is fitted around the magnetic ring 233 and tightly fitted with the rotating shaft 231. The fan 3 is fixed to the rotating shaft 231, and the fan 3 and the motor 2 are coaxially arranged. The stator assembly 22 generates a magnetic field, causing the magnetic ring 233 and the housing 234 to rotate. The housing 234 drives the rotating shaft 231 and the fan 3 to rotate simultaneously. This eliminates the need for additional transmission devices for the motor 2 and the fan 3, effectively improving the transmission efficiency of the neck fan.

[0196] In one embodiment, as shown in Figures 6-9 and 6-10, the fan 3 includes a hub 31 and a plurality of blades 32 spaced around the outer side of the hub 31. The difference between any two of the diameter of the maximum cross-section of the hub 31, the diameter of the housing 234, and the diameter of the inner ring 212 is less than 2 mm. The airflow generated by the plurality of blades 32 can smoothly pass through the area between the housing 234 and the outer ring 211, and the area between the inner ring 212 and the outer ring 211, and is directed towards the air duct 15. The hub 31, the housing 234, and the inner ring 212 are axially aligned and have similar diameters, resulting in a compact structure for the motor 2 and the fan 3.

[0197] In one embodiment, as shown in Figures 6-3, 6-9, and 6-10, the inner ring portion 212 forms a receiving portion 216 on the side of the substrate 214 facing the air duct 15. The drive plate 24 is disposed in the receiving portion 216, and the control member 42 is electrically connected to the drive plate 24. The receiving portion 216 is directly formed by the inner ring portion 212, that is, the drive plate 24 is directly snapped into the inner ring portion 212 and is disposed facing the air duct 15, which facilitates the connection of the drive plate 24 with other electrical components. The substrate 214 also has a notch, through which wires are electrically connected to the stator assembly 22 and the drive plate 24.

[0198] In one embodiment, as shown in Figures 6-8, the cavity further includes a receiving cavity 16 and an extension 19. The control assembly includes a power supply component 41 that provides power to the braking assembly, and a control component 42 that controls the braking assembly. The power supply component 41 is electrically connected to the control component 42, and the control component 42 is electrically connected to the drive plate 24. The extension 19 is arranged side by side with the receiving cavity 16. The maximum cross-sectional diameter of the extension 19 and the receiving cavity 16 is less than 36.5 mm. Therefore, even though the extension 19 and the receiving cavity 16 are arranged side by side, the cross-sectional area of ​​the extension 19 and the receiving cavity 16 is still small, and the overall volume of the neck fan is still small. The extension 19 communicates with the air duct 15, and the housing 1 also has an air outlet 12 that communicates with the extension 19. The braking assembly draws air in through the air inlet 11. Part of the air passes through the air inlet cavity 13, the braking assembly, and the air duct 15, and is then blown out through the air outlet 12. Another part of the air passes through the air inlet cavity 13, the fixing cavity 14, the air duct 15, and the extension 19, and is then blown out through the air outlet 12. By providing the extension 19 and the air outlet 12, the airflow range of the neck fan is extended, improving the user experience.

[0199] In one embodiment, at least one of the two free ends of the housing 1 may be provided with a receiving cavity 16. The power supply component 41 and the control component 42 are housed in the receiving cavity 16, and the control component 42 includes a switch 43 and an interface 44 exposed outside the free end of the housing 1. In other embodiments, the housing 1 may not be provided with the receiving cavity 16, and the neck fan may not have the power supply component 41 inside, and may be directly powered by an external power source through the interface 44.

[0200] In other embodiments, the housing 1 may also have more than four fixed cavities 14, and air inlet cavities 13 and air ducts 15 corresponding to the two ends of each fixed cavity 14, and more than four braking assemblies corresponding to the more than four fixed cavities 14.

[0201] By setting at least three of the aforementioned braking components, the number of elements generating wind is fundamentally increased, thereby increasing the overall wind power and airflow range of the neck fan; at the same time, the space for setting the braking components is increased in the housing 1 around the neck, and the length of the air duct is shortened accordingly, making the airflow from each of the braking components more uniform.

[0202] Option 7

[0203] Referring to Figures 7-1 to 7-3, this application provides a shell structure 1, including a first shell portion 120, a second shell portion 130, and a connecting portion 140. In the extending direction of the first shell portion 120, the first shell portion 120 has a first end 120a and a second end 120b. In the extending direction of the second shell portion 130, the second shell portion 130 has a third end 130a and a fourth end 130b, and the connecting portion 140 connects the second end 120b and the fourth end 130b respectively. The first shell portion 120 and the second shell portion 130 enclose a receiving space 110 to receive a neck. The second end 120b has a first vent 121 in the extending direction of the first shell portion 120, and the fourth end 130b has a second vent 131 in the extending direction of the second shell portion 130. It should be noted that in some embodiments of this application, only the first shell portion 120 may have the first vent 121, or only the second shell portion 130 may have the second vent 131.

[0204] Referring to Figures 7-1 to 7-3, the first shell portion 120 and the second shell portion 130 are mirror-symmetrical structures. They are curved into a "C" shape and together form a receiving space 110 to accommodate the neck. The first end 120a and the third end 130a are located at the opening 111 of the receiving space 110. The user can adjust the connection angle between the first shell portion 120 and the second shell portion 130 by applying external force, thereby adjusting the size of the receiving space 110 and the opening 111, facilitating wearing and removal. The connecting portion 140 connects the second end 120b and the fourth end 130b, thus achieving the connection between the first shell portion 120 and the second shell portion 130. The second end 120b has a first vent 121 extending in the direction of the first shell portion 120, and the fourth end 130b has a second vent 131 extending in the direction of the second shell portion 130. Both the first vent 121 and the second vent 131 are cylindrical, and there are multiple first vents 121 and second vents 131. These multiple first vents 121 and multiple second vents 131 are evenly distributed at the second end 120b and the fourth end 130b. It should be understood that in this embodiment, to reduce the size of the shell structure 1 in the width direction of the first shell portion 120 and the second shell portion 130, the connecting portion 140 connects the second end 120b and the fourth end 130b respectively. In other embodiments of this application, the connecting portion 140 may have one end located at or near the second end 120b, and the other end located at or near the fourth end 130b. It should be noted that, in the embodiments of this application, the extension direction of the first shell portion 120 and the second shell portion 130 is the length direction of the arc-shaped profile, and the width direction refers to the direction perpendicular to the length direction in Figure 7-1.

[0205] Both the first shell portion 120 and the second shell portion 130 are provided with a fan cavity 122. The fan cavity 122 is located near the second end 120b and the fourth end 130b, thereby being close to the first air hole 121 and the second air hole 131, which can reduce the loss of air force. It should be noted that the fact that the first shell portion 120 and the second shell portion 130 are generally arc-shaped does not mean that the shape of the first shell portion 120 and the second shell portion 130 is necessarily arc-shaped. Rather, it means that the two ends of the first shell portion 120 and the second shell portion 130 converge in one direction. In this embodiment, as shown in Figure 7-1, the part of the first shell portion 120 and the second shell portion 130 where the fan cavity 122 is provided is straight, but the first shell portion 120 and the second shell portion 130 are curved into a "C" shape, that is, the first shell portion 120 and the second shell portion 130 are arc-shaped. It should also be noted that this application does not limit the specific position of the fan cavity 122 on the first shell 120 and the second shell 130. In the embodiments provided in this application, the fan cavity 122 is set close to the second end 120b and the fourth end 130b in order to increase the wind power. In other embodiments of this application, taking the first shell 120 as an example, the fan cavity 122 can be set away from the second end 120b. For example, the fan cavity 122 can be set in the middle of the first shell 120 in the extension direction, or the fan cavity 122 can be set in the first end 120a. The structure of the second shell 130 is similar to the structure of the first shell 120, and will not be described in detail here.

[0206] Regarding the aforementioned connecting portion 140, please refer to Figures 7-3 and 7-4. The connecting portion 140 includes a first rotating member 141 and a second rotating member 142 that are rotatably connected. The first rotating member 141 is disposed in the first housing portion 120 and is located at the second end 120b. The second rotating member 142 is disposed in the second housing portion 130 and is located at the fourth end 130b. Specifically, the first rotating member 141 includes a first rotating part 141a and a first fixing part 141b. The first fixing part 141b is fixed to the first shell part 120. The second rotating member 142 includes a second rotating part 142a and a second fixing part 142b. The second fixing part 142b is fixed to the second shell part 130. The first rotating part 141a and the second rotating part 142a are rotatably connected. The first rotating member 141 and the second rotating member 142 are the same size and shape. The first fixing part 141b and the second fixing part 142b are flat plate structures with through holes 140b. Screws pass through the through holes 140b and are screwed to the first shell part 120 and the second shell part 130, thereby realizing the fixing of the first fixing part 141b and the second fixing part 142b on the first shell part 120 and the second shell part 130, respectively. The first rotating part 141a and the second rotating part 142a are formed by bending plate-like structures extending from one side of the first fixed part 141b and the second fixed part 142b, respectively, and have a shaft hole 140a. The connecting part 140 also includes a rotating shaft 143, which is inserted into the first rotating part 141a and the second rotating part 142a to realize the rotational connection between the first rotating member 141 and the second rotating member 142. In other embodiments of this application, the connecting part 140 can also be provided as a flexible connecting shaft. One end of the flexible connecting shaft is fixed to the second end 120b or near the second end 120b, and the other end is fixed to the fourth end 130b or near the fourth end 130b. When the flexible connecting shaft is connected to the second end 120b and the fourth end 130b on both sides respectively, the connecting surface of at least one connecting end of the flexible connecting shaft is smaller than the end face of the second end 120b or the fourth end 130b.

[0207] It should be understood that this application does not limit the specific fixing method of the first fixing part 141b and the second fixing part 142b on the first shell part 120 and the second shell part 130. In other embodiments of this application, the first fixing part 141b and the second fixing part 142b can be fixed to the first shell part 120 and the second shell part 130 by setting a snap connection or riveting or other methods. On the other hand, in order to reduce the number of parts and production costs, the first rotating part 141a and the second rotating part 142a are designed to be the same size and shape in this application, that is, the first rotating part 141a and the second rotating part 142a are both structures with shaft holes 140a. However, this application does not limit this. In other embodiments of this application, the first rotating part 141a and the second rotating part 142a can be one with a shaft hole and the other with a rotating shaft, with the rotating shaft inserted into the shaft hole to realize the rotational connection between the first rotating part 141a and the second rotating part 142a.

[0208] It should be noted that, in this embodiment of the application, in order to simplify the structure of the first shell 120 and reduce the production difficulty and cost of the first shell 120, the first rotating member 141 and the first shell 120 are designed separately and then fixedly assembled by installation. However, this application does not limit this. In other embodiments of this application, the first rotating member 141 and the first shell 120 can be designed as a single piece, thereby reducing the number of parts and assembly steps. The relationship between the second rotating member 142 and the second shell 130 is similar to that described above, and will not be repeated here.

[0209] Preferably, to further increase the air volume, the first shell portion 120 is provided with a third vent 123 on the side opposite to the receiving space 110 and near the second end 120b, and the second shell portion 130 is provided with a fourth vent 132 on the side opposite to the receiving space 110 and near the fourth end 130b. That is, vents are provided on the end face and side face of the second end 120b and the fourth end 130b, so that the second end 120b and the fourth end 130b can simultaneously achieve gas flow from both the parallel direction and the included angle direction of the air intake direction of the fan 20, thereby providing air volume. The third vent 123 and the fourth vent 132 are both cylindrical, and there are multiple third vents 123 and multiple fourth vents 132, which are evenly distributed in the first shell portion 120 and the second shell portion 130, respectively. It should be noted that in some embodiments of this application, only the first shell portion 120 may be provided with the third vent 123, or only the second shell portion 130 may be provided with the fourth vent 132.

[0210] Preferably, the connecting portion 140 further includes a damping element 144, which is an annular damping plate with a notch. There are two damping elements 144, and the rotating shaft 143 is sequentially inserted into the damping element 144, the first rotating portion 141a, the second rotating portion 142a, and the damping element 144. Specifically, the rotating shaft 143 is provided with mounting grooves 143a near both ends, and the damping element 144 is embedded in the mounting grooves 143a through the notch. It should be noted that this application does not limit the shape or number of damping elements 144. For example, in some embodiments of this application, only one damping element 144 may be provided directly between the first rotating part 141a and the second rotating part 142a, or the damping element 144 may be an annular column with thickness. The damping element 144 is radially disposed between the rotating shaft 143 and the first rotating part 141a to achieve a damped rotational connection between the first rotating part 141a and the second rotating part 142a. This allows the first shell 120 and the second shell 130 to maintain a relative angle when the user adjusts the size of the opening 111, making operation easier. It can also be adjusted when the user wears it around their neck, so that the first shell 120 and the second shell 130 fit snugly against the user's neck, preventing the first shell 120 and the second shell 130 from squeezing the neck and thus improving the user experience.

[0211] Preferably, the housing structure 1 further includes a first cover 150 and a second cover 160. The first cover 150 is fixed to the first housing portion 120 and partially located outside the first rotating member 141 to at least partially cover the first rotating member 141. The second cover 160 is fixed to the second housing portion 130 and partially located outside the second rotating member 142 to at least partially cover the second rotating member 142. The arrangement of the first cover 150 and the second cover 160 places the first fixing portion 141b and the second fixing portion 142b in a relatively enclosed space, and covers part of the first rotating portion 141a and part of the second rotating portion 142a, thereby reducing the contamination of the first rotating member 141 and the second rotating member 142 by dust and moisture in the air, facilitating the cleaning and maintenance of the housing structure 1, and thus improving the user experience. It should be noted that the embodiments of this application are for the purpose of simplifying the structure of the first cover 150 and the second cover 160. Therefore, the first cover 150 and the second cover 160 partially cover the first rotating member 141 and the second rotating member 142. However, this application does not limit this. In some embodiments of this application, the first cover 150 and the second cover 160 can completely cover the first rotating member 141 and the second rotating member 142 to achieve a better sealing effect.

[0212] Preferably, the angle between the end face of the second end 120b and the extending direction of the first shell 120 is not equal to 90°, and the angle between the end face of the fourth end 130b and the extending direction of the second shell 130 is not equal to 90°, thereby increasing the end face area of ​​the second end 120b and the fourth end 130b, increasing the area of ​​the first vent 121 and the second vent 131, and thus increasing the air volume. It should be noted that in some embodiments of this application, only the angle between the end face of the second end 120b and the extending direction of the first shell 120 may be not equal to 90°, or only the angle between the end face of the fourth end 130b and the extending direction of the second shell 130 may be not equal to 90°. It should be understood that in the embodiments of this application, the first cover 150 is fixedly installed on the first shell 120, and the first cover 150 and the first shell 120 together constitute the end face of the second end 120b. The first vent 121 is provided on the second end 120b, that is, the first vent 121 is provided on the part of the second end 120b. The angle between the end face of the second end 120b and the extension direction of the first shell 120 is not equal to 90°. However, in some embodiments of this application, the first cover 150 does not constitute the end face of the second end 120b, and the end face of the second end 120b has only one surface. In this case, the angle between the end face of the second end 120b and the extension direction of the first shell 120 is not equal to 90°. The situation of the fourth end 130b is the same as that of the second end 120b, and will not be described in detail here.

[0213] Preferably, in the width direction of the first shell portion 120 and the second shell portion 130, the connecting portion 140 is disposed close to the receiving space 110, thereby increasing the end face area of ​​the second end 120b and the fourth end 130b, and further increasing the area of ​​the first vent 121 and the second vent 131 to increase the air intake volume.

[0214] This embodiment of the application provides a first air hole 121 and a second air hole 131 at the second end 120b and the fourth end 130b, thereby enabling the neck fan 2 to intake air at its ends. This means the air intake direction is parallel to the suction direction of the fan 20, reducing airflow loss due to deflection when the airflow turns from the air inlet to the fan 20. The first housing 120 also has the first air hole 121 and the third air hole 123 on its side and end faces, increasing the airflow direction and thus increasing the airflow force. The second end 120b and the fourth end 130b are arranged at an angle, and the connecting portion 140 is positioned close to the receiving space 110 in the width direction, thereby increasing the area of ​​the angled surface, which in turn increases the area of ​​the first air hole 121 and the second air hole 131, thus increasing the air volume. Furthermore, this embodiment also includes a first cover 150 and a second cover 160, which can partially cover the connecting part 140, thereby preventing dust in the air from adhering to the connecting part 140. Since the connecting part 140 is positioned close to the user's neck during use, the first cover 150 and the second cover 160 prevent the user's neck from directly contacting the connecting part 140, thus preventing oil and dirt from contacting and corroding the connecting part 140. They also prevent the connecting part 140 from squeezing the user's skin or trapping the user's hair when rotating, thus facilitating cleaning and improving the user experience. On the other hand, this embodiment uses a damping hinge 143 connection, allowing the user to turn and stop instantly, providing a superior user experience.

[0215] Please refer to Figures 7-5 and 7-6, and in conjunction with the above figures, this application embodiment also provides a neck fan 2. The neck fan 2 includes the aforementioned housing structure 1, power supply 10, and fan 20. There are two power supplies 10 and two fans 20, respectively located in the first housing portion 120 and the second housing portion 130. The first housing portion 120 is also provided with a fifth air hole 124, and the second housing portion 130 is provided with a sixth air hole 133. The first housing portion 120... 0. The first air hole 121 and the third air hole 123 are air inlets, and the first air inlet and the third air inlet are respectively provided with air inlet chambers 11. The fan 20 is set close to the first air hole 121 and the third air hole 123. The fifth air hole 124 is the air outlet. The airflow flows into the interior of the first shell 120 through the first air hole 121 and the third air hole 123, and is guided by the fan 20 to flow out through the fifth air hole 124. The structure of the second shell 130 is similar to that of the first shell 120, and will not be described in detail here.

[0216] Preferably, as shown in Figures 7-7, both the first housing portion 120 and the second housing portion 130 are provided with wire holes 101. The neck fan also includes a wire 30, which is a strip wire. The wire 30 is electrically connected to two power supplies 10 respectively. The wire 30 passes through the wire holes 101 and hangs down at the connecting portion 140. It should be noted that, in this embodiment, the wire 30 is arranged in a strip shape, which can partially cover the connecting portion 140. The strip wire 30 is more conducive to bending and less prone to damage. However, this application does not limit the specific shape of the wire 30. In other embodiments of this application, the cross-section of the wire 30 can also be cylindrical or rectangular or other polygonal shapes.

[0217] The neck fan 2 of this application embodiment includes the aforementioned housing structure 1. Therefore, the neck fan 2 of this application embodiment has the beneficial effect of the aforementioned housing structure 1. In addition, the neck fan 2 of this application embodiment is located near the air inlet and is provided with an air inlet cavity 11, so that the airflow can have space to turn before being drawn into the fan 20, thereby reducing the loss of wind power.

[0218] Option 8

[0219] In one embodiment, as shown in Figures 8-1 and 8-2, the neck fan includes a housing 1, a braking assembly, and a control assembly, both of which are housed within the housing 1. The housing 1 has an air inlet cavity 13, a fixing cavity 14, an air duct 15, and a receiving cavity 16 along its length. The housing 1 also has an air inlet 11 and an air outlet 12. The air inlet 11 connects to the air inlet cavity 13, and the air outlet 12 connects to the air duct 15. The braking assembly draws air in through the air inlet 11, passes through the air inlet cavity 13, the braking assembly, and the air duct 15, and then blows it out through the air outlet 12. The control assembly includes a first circuit board 51, a second circuit board 52, and a power supply component 53. At least one of the first circuit board 51 and the second circuit board 52 is electrically connected to the power supply component 53, which is located within the receiving cavity 16.

[0220] The housing 1 contains two braking components. The first circuit board 51 is electrically connected to one of the braking components, and the second circuit board 52 is electrically connected to the other braking component. The first circuit board 51 and the second circuit board 52 are connected to each other. By setting two independent but connected circuit boards, the volume required for a large circuit board is divided into the volume of two smaller circuit boards, making the space arrangement of the circuit boards more flexible and better suited for neck fans with limited space.

[0221] It should be understood that in this embodiment, the air inlet cavity 13, the fixing cavity 14, the air duct 15, and the receiving cavity 16 are sequentially arranged along the length direction of the housing 1. Of course, in other embodiments, the receiving cavity 16, the air inlet cavity 13, the fixing cavity 14, and the air duct 15 may also be sequentially arranged along the length direction of the housing 1. The receiving cavity 16 may be located on one side of the air inlet cavity 13 or on one side of the air duct 15.

[0222] In one embodiment, as shown in Figures 8-1 and 8-2, the housing 1 includes two receiving cavities 16, each located near the center of the housing 1. The housing 1 contains two power supply components 53, which are connected in series or in parallel. The first circuit board 51 is electrically connected to one of the power supply components 53, and the second circuit board 52 is electrically connected to the other power supply component 53.

[0223] In one embodiment, as shown in Figures 8-6 and 8-7, the housing 1 includes two receiving cavities 16, which are respectively located near two ends of the housing 1. Two power supply components 53 are provided within the housing 1, and the two power supply components 53 are connected in series or in parallel. The first circuit board 51 is electrically connected to one of the power supply components 53, and the second circuit board 52 is electrically connected to the other power supply component 53.

[0224] By setting two power supply components 53, the neck fan becomes more symmetrical and the weight distribution is more even. The two power supply components 53 can also improve the battery life of the neck fan.

[0225] In one embodiment, as shown in Figures 8-8, the housing 1 includes a receiving cavity 16 located in the middle of the housing 1. A power supply component 53 is disposed within the housing 1. The first circuit board 51 is electrically connected to the power supply component 53, while the second circuit board 52 is not electrically connected to the power supply component 53. The receiving cavity 16 is located in the middle of the housing 1. By using a large power supply component 53 instead of two small, separate power supply components 53, the power supply component 53 is more concentrated and wiring is reduced without affecting battery life.

[0226] In one embodiment, as shown in Figures 8-6 to 8-8, the first circuit board 51 is disposed in the receiving cavity 16, and the second circuit board 52 is disposed in the receiving cavity 16. In another embodiment, as shown in Figures 8-1 to 8-2, the first circuit board 51 is disposed in the air inlet cavity 13, and the second circuit board 52 is disposed in the air inlet cavity 13. In other embodiments, one of the first circuit board 51 and the second circuit board 52 may be disposed in the air inlet cavity 13, and the other of the first circuit board 51 and the second circuit board 52 may be disposed in the receiving cavity 16.

[0227] In one embodiment, as shown in Figures 8-2 to 8-8, the control component further includes a main control chip 512 and a charging interface 522. The first circuit board 51 is equipped with the main control chip 512 and a corresponding main control circuit 511. The second circuit board 52 is equipped with the charging interface 522 and a corresponding charging and power supply circuit 521. By setting independent first circuit boards 51 and second circuit boards 52, the main control chip 512 and the charging interface 522 are respectively placed on different circuit boards, thereby allocating the main control circuit 511 and the charging and power supply circuit 521 to different circuit boards. The first circuit board 51 and the second circuit board 52 perform different functions, achieving functional division. In this embodiment, the first circuit board 51 and the second circuit board 52 are electrically connected via a wire 6. Of course, in other embodiments, the first circuit board 51 and the second circuit board 52 can also be wirelessly connected.

[0228] In one embodiment, as shown in Figures 8-2 to 8-5, each braking assembly includes a drive board 21, which is provided with a drive circuit 211. The first circuit board 51 is electrically connected to one of the drive boards 21 via a wire 6, and the second circuit board 52 is electrically connected to another drive board 21 via a wire 6. By assigning different circuits to different circuit boards, the different circuit boards can be more flexibly arranged within the housing 1. Of course, in other embodiments, the first circuit board 51 and one of the drive boards 21 can also be wirelessly connected, and the second circuit board 52 and another drive board 21 can also be wirelessly connected.

[0229] In one embodiment, as shown in Figures 8-1 to 8-5, the control component further includes an operation unit 54. The operation unit 54 is electrically or wirelessly connected to the main control chip 512 via a wire 6. The main control chip 512 outputs control signals, which are transmitted through the first circuit board 51, the second circuit board 52, and the wire 6 to the charging / power supply circuit 521 of the second circuit board 52, and the two drive circuits 211 of the two drive boards 21, so that the two drive circuits 211 of the two drive boards 21 are turned on, off, or have their speed adjusted. In this embodiment, the operation unit 54 is a scroll wheel button, and the operation unit 54 is directly electrically connected to the main control chip 512. In other embodiments, the operation unit 54 can be controlled via wired means such as a press button, touch button, sliding resistor, touch slide, or touch screen, or wirelessly via a mobile device, remote control, etc.

[0230] It should be understood that although the main control chip 512 and the main control circuit 511 are only located on the first circuit board 51, the first circuit board 51 and the second circuit board 52 are electrically connected. Therefore, after receiving the control signal from the main control chip 512, the main control circuit 511 can send it to the charging circuit 521 and the drive circuit 211 via wired or wireless connection, so as to achieve synchronous control of the two drive circuits 211 of the two drive boards 21 by the same control signal. It should be noted that the synchronous control of the two drive circuits 211 by the control signal means that the same control signal can simultaneously achieve the same control action on the two drive circuits 211, but this is not limited to the two drive circuits 211 always maintaining the same working mode. In other embodiments, the two drive circuits 211 can also support their own independent control operations.

[0231] In addition, since the main control chip 512 and the charging interface 522 are located on different circuit boards, the operation unit 54 of the physical key and the charging interface 522 can be located in different positions on the housing 1, making the product functions clearly defined and the appearance more aesthetically pleasing.

[0232] In one embodiment, as shown in Figures 8-2, 8-3, and 8-5, each braking assembly includes a motor 2, a fan 3, and a drive plate 21. The drive plate 21 and the motor 2 are electrically connected, and the motor 2 and the fan 3 are mechanically connected. The fixed cavity 14 has a circular cross-section, with an outer diameter of 28.6-34 mm. The maximum cross-sectional area of ​​the air duct 15 is less than or equal to the minimum cross-sectional area of ​​the fixed cavity 14. Therefore, the neck fan has a small cross-section in the fixed cavity 14 and the air duct 15, resulting in a small overall size and easy portability.

[0233] Specifically, the braking assembly further includes a cylinder 4, which includes an outer ring portion 41, an inner ring portion 42, and a plurality of connecting blades 43 connecting the outer ring portion 41 and the inner ring portion 42. The inner ring portion 42 is located on the side of the outer ring portion 41 near the air duct 15, and the inner ring portion 42 protrudes slightly towards the air duct 15, thus providing more space for other structures to be arranged on the side of the outer ring portion 41 facing the air inlet cavity 13. The motor 2 is fixed to the side of the inner ring portion 42 near the air inlet cavity 13, and the fan 3 is connected to the motor 2 and located on the side of the inner ring portion 42 near the air inlet cavity 13, resulting in a reasonable internal space layout for the cylinder 4.

[0234] In one embodiment, as shown in Figures 8-2, 8-3 and 8-5, the motor 2 is a three-phase brushless motor 2.

[0235] It should be understood that Figures 8-1 to 8-5 represent the first embodiment, Figures 8-6 to 8-7 represent the second embodiment, and Figure 8-8 represents the third embodiment. The differences between the second and third embodiments and the first embodiment have been explained, and other features are basically the same, so they will not be repeated here.

[0236] Option Nine

[0237] In one embodiment, as shown in Figures 9-1 to 9-3, the portable fan includes a housing 1, a braking assembly, an adjustment module 2, and a display module 3. The braking assembly is housed within the housing 1, and the adjustment module 2 and the display module 3 are mounted on the housing 1. The housing 1 includes an air inlet 11 and an air outlet 12. The braking assembly draws air into the housing 1 through the air inlet 11 and blows it out through the air outlet 12. The adjustment module 2 controls the opening, closing, and speed adjustment of the braking assembly, and the display module 3 displays one or more of the following: wind speed, light level, and battery level. The adjustment module 2 and the display module 3 are mounted on the same circuit board 4. By mounting the adjustment module 2 and the display module 3 on the same circuit board 4, the adjustment module 2 and the display module 3 are centralized, and with the cooperation of the display module 3, the adjustment module 2 can be better operated, thereby adjusting to the user's desired mode.

[0238] In one embodiment, as shown in Figures 9-1 to 9-3, the adjustment module 2 includes an exposed rotating component 21, which is columnar. The rotating component 21 includes a rotating part 211 and a display part 212. The rotating part 211 is located on the arcuate side of the rotating component 21, and the display part 212 is located on the end face of the rotating component 21 and is exposed outward.

[0239] In one embodiment, as shown in Figures 9-1 to 9-3, the display module 3 includes a display element 31 housed within the housing, and the content of the display element 31 can be displayed externally through the display section 212. By placing the display element 31 within the rotating member 21, the rotating member 21 simultaneously possesses both adjustment and display functions, resulting in richer and more concentrated functionality. In other embodiments, when the rotating member 21 is relatively high, the display element 31 can also be disposed within the rotating member 21.

[0240] In one embodiment, as shown in Figures 9-1 to 9-3, the adjustment module 2 includes a continuously variable adjustment element (not shown, the same below). The continuously variable adjustment element is disposed on the circuit board 4, and the rotating element 21 is connected to the continuously variable adjustment element. The rotating element 21 and the continuously variable adjustment element are fixedly connected, and the specific connection method can be any fixing method in the prior art. The braking assembly includes a motor (not shown, the same below) electrically connected to the circuit board 4, and a fan (not shown, the same below) connected to the motor. When the rotating element 21 rotates, the continuously variable adjustment element changes accordingly, and adjusts the power output to the motor through the circuit board 4, thereby adjusting the speed of the motor, and also adjusting the speed of the fan.

[0241] In one embodiment, as shown in Figures 9-1 to 9-3, the continuously variable adjustment element is a potentiometer, a rotary encoder, or other similar functional components. When the continuously variable adjustment element is a potentiometer, rotating the rotary element 21 adjusts the resistance value of the potentiometer, and the circuit board 4 adjusts the power output to the motor according to the change in resistance. When the continuously variable adjustment element is a rotary encoder, rotating the rotary element 21 adjusts the rotary encoder, and the output terminal of the rotary encoder feeds back a phase difference to the circuit board 4. The circuit board 4 adjusts the power output to the motor according to the phase difference.

[0242] In one embodiment, as shown in Figures 9-1 to 9-3, the portable fan is a neck fan. The housing 1 includes two free ends, and the rotating part 21 is disposed on one of the free ends. The rotating part 211 corresponds to the side of the housing 1, and the display part 212 corresponds to the end face of the housing 1. That is, the display part 212 is directly displayed on the end of the housing 1, allowing the user to quickly and clearly identify data. Simultaneously, the rotating part 211 is also located on the side of the end of the housing 1, facilitating user operation. When the rotating part 21 is disposed on the end face of the free end of the housing 1, the installation of the rotating part 21 is more convenient, and the internal circuit setup is also more convenient.

[0243] In one embodiment, the diameter of the rotating component 21 differs from the cross-sectional diameter of the free end of the housing 1 by less than 8 mm. As shown in Figures 9-1 to 9-3, in this embodiment, the diameter of the rotating component 21 is equal to the cross-sectional diameter of the free end of the housing 1. Utilizing the position of the end of the housing 1, the structural design is reasonable and the shape is integrated without being abrupt.

[0244] In one embodiment, as shown in Figures 9-1 to 9-3, the rotating part 211 and the display part 212 are separate structures. The rotating part 211 has a stepped portion 2111, and the housing 1 has a protrusion 15. A first fixing portion 151 is provided on the inner side of the protrusion 15. The rotating part 211 is nested outside the protrusion 15, and the stepped portion 2111 is flush with the end of the protrusion 15. A second fixing portion 2121 protrudes from one side of the display part 212 towards the housing 1. The second fixing portion 2121 is fixed to the first fixing portion 151, and the display part 212 abuts against the ends of the stepped portion 2111 and the protrusion 15. By fixing the second fixing portion 2121 to the first fixing portion 151, the rotating part 211, the display part 212, and the protrusion 15 of the housing 1 are simultaneously fixed together, resulting in a reasonable structural design.

[0245] To ensure airtightness and prevent moisture from entering and damaging internal components, a sealing ring can be installed to enhance the sealing and protection effect.

[0246] It should be understood that the adjustment module 2 and the display module 3 can be directly integrated into the circuit board 4, and the adjustment module 2 and the display module 3 can be detachably installed on the circuit board 4, for example, by connecting them through contacts, and this is not a limitation.

[0247] In one embodiment, as shown in Figures 9-4 and 9-5, the portable fan is a handheld fan, and the housing 1 includes an air outlet 13. The air outlet 13 includes a front shell 1A and a rear shell (not shown, the same below) connected together. The air inlet 11 is located on the rear shell (the air inlet 11 in this embodiment is not shown in the figures), and the air outlet 12 is located on the front shell 1A. The rotating member 21 is located in the middle area of ​​the front shell 1A. That is, the display part 212 and the display element 31 are located in the middle area of ​​the front shell 1A and are forward-facing for easy viewing by the user. Furthermore, the rotating member 21 is located in the middle area of ​​the front shell 1A and is on the same axis as the motor and the fan. The rotating member 21 is arranged corresponding to the motor, and the air outlet of the fan is radially outside the motor, which has little impact on the air outlet effect of the fan. Of course, in other embodiments, the portable fan may not be a handheld fan, but may be other types of fans, or a portable fan that only has the air outlet 13.

[0248] In one embodiment, as shown in Figures 9-4 and 9-5, the housing 1 is provided with a protrusion 15, and a first fixing part 151 is provided on the inner side of the protrusion 15; the rotating part 211 and the display part 212 are integral structures, and the rotating part 21 protrudes toward the housing 1 and is provided with a second fixing part 2121, the second fixing part 2121 is fixed to the first fixing part 151, and the rotating part 21 is fixed to the housing 1.

[0249] In one embodiment, the portable fan is a handheld fan, and the housing 1 includes a handheld portion 14. The rotating member 21 protrudes from the handheld portion 14, facilitating user hand-held operation and adjustment. It should be understood that the handheld portion 14 includes a side surface and an end surface, and the rotating member 21 can be disposed on either the side surface or the end surface of the handheld portion 14. As shown in Figures 9-6, when the rotating member 21 is disposed on the end surface of the handheld portion 14, its installation is more convenient, and the internal circuitry is also more easily configured.

[0250] It should be understood that the portable fan can also be other types of small fans, such as clip fans, desktop fans, etc., and is not limited thereto.

[0251] Option 10

[0252] In one embodiment, as shown in Figures 10-1 to 10-3, the portable fan includes a housing 1, a braking assembly, and a temperature regulating element 2. The braking assembly is housed within the housing 1, and the temperature regulating element 2 is embedded in the housing 1 and exposed to the outside. The housing 1 includes an air inlet cavity 13, a fixed cavity 14, an air duct 15, and a receiving cavity 16 arranged along its length. The housing 1 also includes an air inlet 11 communicating with the air inlet cavity 13 and an air outlet 12 communicating with the air duct 15. The temperature regulating element 2 comes into contact with the human body. The housing 1 has a vent 17 corresponding to the temperature regulating element 2. The braking assembly is housed in the fixed cavity 14. The air generated by the braking assembly blows towards the air duct 15, with some air blowing out from the air outlet 12 and some air passing through the temperature regulating element 2 and then blowing out from the vent 17.

[0253] By incorporating the temperature regulating element 2, the user can adjust the temperature upon contact, thus improving the user experience. The air inlet cavity 13, the fixing cavity 14, the air duct 15, and the receiving cavity 16 are arranged along their length, which helps to reduce the cross-sectional area, making them more compact and portable. The air generated by the braking assembly simultaneously blows towards the user and helps dissipate heat from the temperature regulating element 2; a single braking assembly can achieve both functions.

[0254] In one embodiment, as shown in Figures 10-1 to 10-3, the temperature regulating element 2 includes a mounting element 21, a temperature conducting element 22, a temperature regulating element 23, and a heat dissipation element 24. The mounting element 21 is mounted on the outer surface of the housing 1, and the temperature conducting element 22 and the temperature regulating element 23 are mounted on the mounting element 21. The temperature conducting element 22 is located on one side of the temperature regulating element 23 and is exposed outwardly from the mounting element 21. The heat dissipation element 24 is located on the other side of the temperature regulating element 23, and at least a portion of the heat dissipation element 24 is housed within the housing 1. It should be understood that the heat dissipation element 24 dissipates heat from the temperature regulating element 23, and the heat dissipation element 24 can be any part or medium with heat dissipation properties, which is not limited here. The temperature regulating element 23 generates heat during operation, and a large amount of heat is generated when the temperature regulating element 23 operates continuously. Therefore, the heat dissipation element 24 is provided on the other side of the temperature regulating element 23. The heat dissipation element 24 is thermally connected to the temperature regulating element 23. The heat dissipation element 24 dissipates the heat generated by the temperature regulating element 23, so that the temperature regulating element 23 can maintain a normal working state and extend the service life of the temperature regulating element 23.

[0255] In one embodiment, as shown in Figures 10-1 to 10-3, a heat dissipation channel 18 is provided inside the housing 1. One end of the heat dissipation channel 18 is connected to the air duct 15, and the other end of the heat dissipation channel 18 is connected to the vent 17. The heat dissipation channel 18 is connected to the air duct 15, allowing some air to flow from the air duct 15 to the heat dissipation channel 18. The heat sink 24 is disposed in the heat dissipation channel 18. Airflow passes through the heat sink 24, carrying away the heat generated by the heat sink 24, and is blown out from the vent 17 without affecting the air outlet 12.

[0256] In one embodiment, as shown in Figures 10-1 to 10-3, the portable fan is a neck-hanging fan. The housing 1 includes a first housing 1A and a second housing 1B symmetrically arranged and connected, which surround the neck of the user. Both the first housing 1A and the second housing 1B include a free end and a connecting end. The free ends of the first housing 1A and the second housing 1B do not have the air inlet 11, while the air inlet 11 is located near the free ends of both the first housing 1A and the second housing 1B. The free ends of the first housing 1A and the second housing 1B are used to house a switch and a charging interface, facilitating switch control and charging. The structure is rationally designed and easy to assemble. Of course, in other embodiments, the air inlet 11 may be located at the free ends and / or near the free ends of the first housing 1A and the second housing 1B.

[0257] The fixed cavity 14 of the first housing 1A and the second housing 1B is provided with the braking assembly corresponding to the air inlet 11. The braking assembly draws air in from the air inlet 11, and after passing through the air inlet cavity 13 and the braking assembly, blows it towards the air duct 15. The connecting ends of the first housing 1A and the second housing 1B are each provided with a receiving cavity 16. The air inlet cavity 13 is located near the free end of the first housing 1A and the second housing 1B, corresponding to the air inlet 11. The receiving cavity 16 is located at the connecting end of the first housing 1A and the second housing 1B, resulting in a reasonable structural distribution.

[0258] At least a portion of the heat dissipation channel 18 is arranged side-by-side with the receiving cavity 16 in the width direction. By utilizing the position of the connection end between the first housing 1A and the second housing 1B, the side-by-side arrangement of the heat dissipation channel 18 and the receiving cavity 16 increases the counterweight of the portable fan at the back of the neck, preventing the connection end from being too light and causing forward pressure on the back of the neck. The temperature-conducting element 22 is placed against the neck, while the vent 17 faces away from the neck. The temperature-conducting element 22 directly adjusts to the neck it contacts, while the hot air exhausted from the vent 17 after passing through the heat dissipation channel 18 faces away from the neck, resulting in a better user experience. Furthermore, in this embodiment, an air outlet 12 is also provided corresponding to the heat dissipation channel 18, which can dissipate heat from the back of the neck area and enhance airflow inside the housing 1.

[0259] In one embodiment, as shown in Figures 10-4 and 10-5, the portable fan is a neck-hanging fan. The housing 1 includes a first housing 1A and a second housing 1B symmetrically arranged and connected, which surround the neck of the human body. Both the first housing 1A and the second housing 1B include a free end and a connecting end. The connecting end and the portion near the connecting end of the first housing 1A and the second housing 1B are provided with air inlets 11. The connecting end portion of the first housing 1A and the second housing 1B is used for connection and fixation, while the remaining portion provides the air inlets 11. The air inlets 11 are also provided near the connecting end, thus ensuring sufficient airflow without affecting the connection between the first housing 1A and the second housing 1B. Of course, in other embodiments, the air inlets 11 may also be provided at the connecting end and / or near the connecting end of the first housing 1A and the second housing 1B.

[0260] Both the first housing 1A and the second housing 1B have a braking assembly in their fixed cavity 14 corresponding to the air inlet 11. The braking assembly draws air in through the air inlet 11, and after passing through the air inlet cavity 13 and the braking assembly, blows it towards the air duct 15. Both the first housing 1A and the second housing 1B have a receiving cavity 16 at their free ends. The air inlet cavity 13 is located at the connection end of the first housing 1A and the second housing 1B, corresponding to the air inlet 11. The receiving cavity 16 is located at the free end of the first housing 1A and the second housing 1B, resulting in a reasonable structural distribution.

[0261] In the longitudinal direction, the heat dissipation channel 18 is located between the air duct 15 and the receiving cavity 16, which is more conducive to forming a shell 1 with a small cross-sectional area, making it more comfortable to wear. Airflow passes through the air duct 15 and then blows towards the heat dissipation channel 18, without affecting the normal airflow force and efficiency through the air duct 15 and the air outlet 12. Furthermore, the heat dissipation channel 18 is located downstream of the air duct 15, which helps to alleviate airflow blockage caused by excessive air volume and avoids noise. The temperature-conducting element 22 is placed against the neck, and the vent 17 faces away from the neck. The temperature-conducting element 22 directly adjusts to the neck it contacts, while the hot air discharged from the vent 17 after passing through the heat dissipation channel 18 faces away from the neck, resulting in a better user experience.

[0262] In one embodiment, as shown in Figures 10-1 to 10-5, the mounting component 21 and the temperature-conducting component 22 extend along the length of the housing 1, resulting in a larger contact area between the temperature-conducting component 22 and the user's neck, thus improving the user experience. As shown in Figures 10-1 to 10-3, a flow channel 211 is formed between the mounting component 21 and the housing 1, and this flow channel 211 communicates with the air duct 15, which helps alleviate airflow blockage caused by excessive airflow and avoids noise generated by excessive airflow. Of course, in other embodiments, the flow channel 211 communicating with the air duct 15 may not be provided.

[0263] In one embodiment, as shown in Figures 10-1 to 10-5, the portable fan further includes a power supply component 5 and a control board 6. The power supply component 5 is located in the receiving cavity 16, and the braking assembly includes a motor 3 and a fan 4. The motor 3, the power supply component 5, and the temperature regulating component 23 are all electrically connected to the control board 6. The motor 3 is a three-phase high-speed motor, which can provide high-speed and stable rotation, ensuring airflow and air pressure, and providing good blowing effect.

[0264] Furthermore, the fan 4 is an axial flow or mixed flow fan. Axial flow or mixed flow fans are more compact than centrifugal fans, which helps to reduce the volume of the fixed cavity 14, thereby making the overall housing 1 more compact.

[0265] In one embodiment, as shown in Figures 10-1 to 10-5, the fixed cavity 14 has a circular cross-section, and the air duct 15 has a reduced cross-section in the direction away from the fixed cavity 14. This reduced cross-section increases the air pressure generated by the braking assembly, allowing the air to flow more smoothly to the downstream end of the air duct 15 and preventing backflow.

[0266] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0267] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A portable fan, wherein, The portable fan comprises: a shell, which is sequentially provided with an air inlet cavity, a fixing cavity and an air duct along a length direction, and is further provided with an air inlet and an air outlet, the air inlet being communicated with the air inlet cavity, and the air outlet being communicated with the air duct; a braking assembly, which is accommodated in the fixing cavity, and which sucks air from the air inlet, and blows the air out of the air outlet via the air inlet cavity, the braking assembly and the air duct; wherein the air outlet is arranged along the length direction of the air duct, the shell has an inner surface and an outer surface, the air outlet is defined by the inner surface and the outer surface, and the inner surface and the outer surface are arranged at intervals, or are close to or overlap with each other, at the air outlet.

2. The portable fan according to claim 1, wherein the air outlet has an outlet, and at the outlet of the air outlet, the interval range of the inner surface and the outer surface is 1-5 mm.

3. The portable fan according to claim 1, wherein the shell comprises a first wall and a second wall, a first side of the first wall is closedly connected with a first side of the second wall, a second side of the first wall is arranged opposite to and at intervals from a second side of the second wall, and an outer surface of the first wall and an inner surface of the second wall define the air outlet.

4. The portable fan according to claim 3, wherein the first side of the first wall and the second side of the first wall extend in the same direction, and the second side of the first wall extends beyond the first side of the first wall, the first side of the second wall and the second side of the second wall extend in the same direction, and the second side of the second wall extends beyond the first side of the second wall, and the depth of the air outlet is 15-23 mm.

5. The portable fan according to claim 3, further comprising a plurality of guides, which are arranged at intervals along the length direction of the air duct, and which are used for guiding the air generated by the braking assembly to blow toward the air outlet, and which simultaneously abut against the first wall and the second wall.

6. The portable fan according to claim 1, wherein the braking assembly comprises a motor and a fan, the motor comprises a cylinder, a stator assembly and a rotor assembly, the motor is a three-phase high-speed motor, and at least part of the fan is arranged in the cylinder.

7. The portable fan according to claim 6, wherein ​ The cylinder comprises an outer ring, an inner ring, and a plurality of connecting leaves connecting the outer ring and the inner ring, the inner ring is arranged on the side of the outer ring close to the air duct, the inner ring is provided with a base plate, a hollow shaft cylinder axially extends from the base plate towards the air inlet cavity, the rotor assembly comprises a rotating shaft, a bearing and a magnetic ring, the rotating shaft and at least one bearing are arranged in the shaft cylinder, the stator assembly is arranged on the radial outer side of the rotating shaft and the shaft cylinder, and the magnetic ring is arranged on the radial outer side of the stator assembly; The fan is arranged on the side of the outer ring close to the air inlet cavity, and the fan is fixed on the rotating shaft; The inner ring is formed with a receiving portion on the side of the base plate close to the air duct, a driving plate is arranged in the receiving portion, the control member is electrically connected with the driving plate, and the base plate is further provided with a notch, and a wire is electrically connected with the stator assembly and the driving plate through the notch.

8. The portable fan of claim 7, wherein, Further comprising a control assembly, the control assembly comprises a power supply for providing power for the brake assembly, and a control member for controlling the brake assembly, the power supply is electrically connected with the control member, and the control member is electrically connected with the driving plate; The shell is provided with the air inlet cavity, the fixing cavity, the air duct and the accommodating cavity along the length direction, the control assembly is accommodated in the accommodating cavity, and the control member comprises a switch and an interface exposed outside the shell.

9. The portable fan of claim 1, wherein, The length of the air duct is 4-6 times the length of the air inlet cavity, the maximum cross-sectional area of the air duct is smaller than the minimum cross-sectional area of the air inlet cavity, the maximum cross-sectional area of the fixing cavity is smaller than or equal to the minimum cross-sectional area of the air inlet cavity, and the minimum cross-sectional area of the fixing cavity is greater than or equal to the maximum cross-sectional area of the air duct.

10. The portable fan of claim 1, wherein, The part of the shell in the fixing cavity is cylindrical, the diameter of the part of the shell in the fixing cavity is 28-35 mm, and the length of the part of the shell in the fixing cavity is 30-40 mm.

11. The portable fan of claim 4, wherein, One side of the air outlet is further provided with a suction port, and the air flow blown out of the portable fan is sucked through the suction port.

12. The portable fan of claim 11, wherein, The shell further comprises a third wall, the third wall is arranged outside the second side of the second wall, and the third wall and the second side of the second wall are spaced apart to form the suction port.

13. The portable fan of claim 12, wherein, The spacing between the third wall and the second side of the second wall is 2.7-3.1 mm, and the spacing between the third wall and the second side of the first wall is 6.6-12.6 mm.

14. The portable fan of claim 12, wherein, The outer surface of the second side of the first wall is formed with a Coanda surface, and the air outlet is arranged to guide the air flow to the Coanda surface.

15. The portable fan of claim 12, wherein, one side of the third wall extends in the same direction as the second side of the second wall, and the one side of the third wall extends beyond the second side of the second wall, the other side of the third wall extends in the same direction as the second side of the first wall, and the other side of the third wall does not extend beyond the second side of the first wall; the air inlet and the air outlet extend in parallel and are arranged side by side along the length direction.

16. The portable fan of claim 1, wherein, the air duct comprises a first air narrowing section and a second air narrowing section connected in sequence along the length direction, the first air narrowing section is arranged adjacent to the fixed cavity, the first air narrowing section has a portion with a reduced cross section relative to the fixed cavity, and the second air narrowing section has a portion with a reduced cross section relative to the first air narrowing section.

17. The portable fan of claim 16, wherein, the length of the first air narrowing section is less than the length of the second air narrowing section, and the length of the second air narrowing section is 2-8 times the length of the first air narrowing section.

18. The portable fan of claim 16, wherein, the second air narrowing section comprises a wind gathering portion arranged at an end of the second air narrowing section away from the brake assembly, the wind gathering portion is configured to reduce the cross section, and the wind gathering portion reduces the cross section of the second air narrowing section more strongly along the direction away from the brake assembly.

19. The portable fan of claim 16, wherein, a first limiting portion is arranged between the fixed cavity and the air inlet cavity, and a second limiting portion is arranged between the fixed cavity and the air duct, the first limiting portion and the second limiting portion jointly limit the brake assembly; an inner wall of the first air narrowing section is arranged extending from a free edge of the second limiting portion towards the second air narrowing section, and the cross-sectional area of the first air narrowing section gradually decreases along the length direction away from the brake assembly.

20. The portable fan of any one of claims 1-19, wherein, the portable fan is a neck fan, the housing is symmetrically provided with two air inlet cavities, two fixed cavities, and two air ducts, two brake assemblies are respectively arranged in the two fixed cavities, the air outlet is worn upwards, and the wind generated by the brake assembly blows towards the user's head, or the air outlet is worn downwards, and the wind generated by the brake assembly blows towards the user's neck.

Images