Portable fan and fan assembly

Abstract

The present application provides a portable fan and a fan assembly. The portable fan comprises a first main body portion, a first power supply assembly and a first fan assembly. The first main body portion is of an arc-shaped structure, and comprises a first air guide path located on the outer side and a first mounting cavity located inside the first main body portion; and the first air guide path comprises a first recessed surface located on the outer side of the first mounting cavity. The first power supply assembly is located in the first mounting cavity. The first fan assembly is arranged at one end of the first main body portion and is used for blowing air towards the first air guide path; the first recessed surface is used for guiding the air from the first fan assembly to one side of the first main body portion; the first fan assembly comprises a first motor and first fan blades mounted on an output shaft of the first motor; and the first motor is electrically connected to the first power supply assembly.

Description

A portable fan and fan assembly Technical Field

[0001] This application relates to the field of fans, and more particularly to a portable fan and fan assembly. Background Technology

[0002] Portable fans, as a convenient cooling device, have received widespread attention and application in hot seasons in recent years. In particular, neck fans are popular because they can be carried around and free up the hands.

[0003] However, as people continue to pursue a more comfortable experience, their expectations for the performance of neck fans are also gradually increasing. In the sweltering summer, users hope to achieve a faster and more direct cooling effect in high-temperature environments, a need that traditional neck fan designs have failed to fully meet. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this application provides a portable fan, a neck-hanging fan, and a fan assembly.

[0005] One embodiment of this application provides a portable fan including a first main body, a first power supply component, and a first fan assembly. The first main body has an arc-shaped structure, including a first air guide path located on the outer side and a first mounting cavity located inside the first main body. The first air guide path includes a first recessed surface located on the outer side of the first mounting cavity. The first power supply component is located inside the first mounting cavity. The first fan assembly is disposed at one end of the first main body and is used to blow air toward the first air guide path. The first recessed surface is used to guide the airflow from the first fan assembly to one side of the first main body. The first fan assembly includes a first motor and a first fan blade mounted on the output shaft of the first motor. The first motor is electrically connected to the first power supply component.

[0006] One embodiment of this application also provides a neck fan, which includes a portable fan as described in any of the above embodiments, another portable fan, and a connector, wherein the connector is detachably connected to at least one of the first portable fan and the other portable fan assembly.

[0007] One embodiment of this application also provides a fan assembly, including a first fan housing, a first motor, and a first fan blade connected to the first motor. The first fan blade is disposed in the first fan housing. The first fan housing includes a housing body and an air outlet shroud. The air outlet shroud is disposed on one side of the housing body and has an air outlet hole. The air outlet shroud includes a plurality of air outlet plates and an annular wall structure connected to the periphery of the plurality of air outlet plates. A plurality of air outlet holes are defined between the plurality of air outlet plates. The housing body includes an annular side wall structure, a mounting portion located at one end of the side wall structure, and a guide portion connected between the mounting portion and the side wall structure. The guide portion includes a plurality of spaced-apart guide vanes for directing air from the first fan blade toward the air outlet shroud. The first fan blade and the first motor are disposed within the side wall structure and located on the side of the mounting portion away from the air outlet shroud. The first motor is mounted on the mounting portion and is used for electrical connection with an external first power supply component.

[0008] The beneficial effects of this application are: by setting the first air guide path, the airflow from the first fan assembly can be directed to one side of the first main body, thereby expanding the airflow area of ​​the first fan assembly and improving the user experience of the portable fan. Furthermore, the fan assembly of this application not only has a pressurized air outlet shroud to improve airflow performance. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. The accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 is a schematic diagram of the overall structure of the neck fan according to Embodiment 1 of this application;

[0012] Figure 2 is a schematic diagram of the overall structure of the neck fan according to Embodiment 1 of this application from another perspective.

[0013] Figure 3 is a cross-sectional view of the neck fan according to Embodiment 1 of this application;

[0014] Figure 4 is an exploded view of the neck fan of Embodiment 1 of this application;

[0015] Figure 5 is a magnified view of part V in Figure 3;

[0016] Figure 6 is a magnified view of part VI in Figure 4;

[0017] Figure 7 is a block diagram of the neck fan principle of Embodiment 1 of this application;

[0018] Figure 8 is a circuit diagram of the first charging interface of the neck fan of this application;

[0019] Figure 9 is a circuit diagram of the first charging control module of the neck fan of this application;

[0020] Figure 10 is a circuit diagram of the first battery of the neck fan of this application;

[0021] Figure 11 is a circuit diagram of the first main control module of the neck fan of this application;

[0022] Figure 12 is a circuit diagram of the first boost module and the first motor of the neck fan of this application;

[0023] Figure 13 is a circuit diagram of the first main control module, the first boost module, and the first motor of a modified embodiment of the neck fan of this application;

[0024] Figure 14 is a circuit diagram of the first main control module, the first boost module, and the first motor of another modified embodiment of the neck fan of this application;

[0025] Figure 15 is a circuit diagram of the first main control module, the first boost module, and the first motor of another modified embodiment of the neck fan of this application;

[0026] Figure 16 is a schematic diagram of the overall structure of Embodiment 2 of the neck fan of this application;

[0027] Figure 17 is a schematic block diagram of the first main body of the neck fan of this application in Embodiment 2;

[0028] Figure 18 is a schematic block diagram of the second main body of the neck fan of this application according to Embodiment 2;

[0029] Figure 19 is a schematic diagram of the overall structure of Embodiment 3 of the neck fan of this application;

[0030] Figure 20 is an exploded view of Embodiment 3 of the neck fan of this application;

[0031] Figure 21 is another exploded view of Embodiment 3 of the neck fan of this application;

[0032] Figure 22 is a cross-sectional view of Embodiment 3 of the neck fan of this application;

[0033] Figure 23 is an exploded view of the main body of the fan in this application;

[0034] Figure 24 is an exploded view of Figure 23 from another angle;

[0035] Figure 25 is a schematic diagram of the outer side of the first main body of the fan body shown in Figure 23;

[0036] Figure 26 is a schematic diagram of the inner side of the first outer cover of the fan body shown in Figure 23;

[0037] Figure 27 is a schematic diagram of the metal mesh structure of the first fan assembly in a modified embodiment of the third embodiment of the fan body of this application;

[0038] Figure 28 is an exploded view of the fan assembly of the portable fan of the fourth embodiment of the fan body of this application;

[0039] Figure 29 is an exploded view of the fan assembly shown in Figure 28 from another angle;

[0040] Figure 30 is a cross-sectional view of the output shaft and fan blades of the fan assembly shown in Figure 28 in the first limit position;

[0041] Figure 31 is a cross-sectional view of the output shaft and fan blades of the fan assembly shown in Figure 28 in the second limit position;

[0042] Figure 32 is a perspective view of the neck fan of Embodiment 5 of this application from a first-view perspective;

[0043] Figure 33 is a stereoscopic view of the neck fan shown in Figure 32 from a second perspective.

[0044] Figure 34 is a partial exploded structural diagram of the neck fan shown in Figure 32;

[0045] Figure 35 is a cross-sectional view of the neck fan shown in Figure 32;

[0046] Figure 36 is a stereoscopic view of the neck fan shown in Figure 32 from a third-person perspective;

[0047] Figure 37 is an enlarged view of point A in Figure 36;

[0048] Figure 38 is a perspective view of the neck fan according to Embodiment Six of this application;

[0049] Figure 39 is a 3D view of the neck fan shown in Figure 38. Detailed Implementation

[0050] Example 1

[0051] Referring to Figures 1 to 15, a neck-hanging fan includes a neck-hanging body 1 and a first fan assembly 3. The lower end of the neck-hanging body 1 has a protruding cylindrical first air guide cavity 2. The first air guide cavity 2 includes a first air inlet 22 disposed at the lower end of the neck-hanging body 1 and a first air outlet 23 disposed opposite to the first air inlet 22. The neck-hanging body 1 includes an inner end 11 that contacts the neck of the user, and the first air outlet 23 is disposed facing the inner end 11. The first fan assembly 3 is located within the first air guide cavity 2 and is used to drive airflow from the first air inlet 22 through the first air outlet 23 to the inner end 11. With this structure, because the first air guide cavity 2 is cylindrical, the neck-hanging fan forms a vertically blowing direct-flow fan. The first fan assembly 3 can drive airflow from the first air inlet 22 through the first air outlet 23 to the inner end 11, greatly improving the blowing efficiency. When using the neck-hanging fan, the user can more directly feel the cool airflow blowing directly onto the neck, improving the overall performance of the fan. Furthermore, since the first air guide cavity 2 is a straight cylindrical cavity that is integrally formed and protrudes from the neck hanger body 1, this design enhances the overall aesthetics and design of the product, and helps to improve the wearing comfort of the neck hanger fan, thereby improving the overall quality of the product and the user experience.

[0052] In this embodiment, the neckband body 1 is a U-shaped neckband body 1, which includes a first main body portion 101, a second main body portion 102, and a connector 103. The first main body portion 101 and the second main body portion 102 are detachably connected by the connector 103. The connector 103 is a flexible connector, specifically, it can be a silicone connector, a plastic connector, a rubber connector, etc. The first fan assembly 3 is disposed on the first main body portion 101.

[0053] In this embodiment, the neck fan (such as the first main body 101) has a recessed first air guide 12, which extends from the first air outlet 23 to the inner end portion 11. The first fan assembly 3 drives airflow to exit from the first air outlet 23 and blow it along the first air guide 12 toward the inner end portion 11. Furthermore, the inner end portion 11 is connected to a flexible first neck support 111, and a first air inlet gap 121 is formed between the first neck support 111 and the inner end portion 11. The first fan assembly 3 drives airflow to exit from the first air outlet 23 and blow it along the first air guide 12 toward the first air inlet gap 121. The first neck support 111 can be a silicone neck support, a plastic neck support, a rubber neck support, etc. With the above structure, when the airflow is blown out from the first air outlet 23, under the guidance of the concave first air guide 12, the airflow will blow along the first air guide 12 toward the inner end 11. And due to the first air inlet gap 121, the airflow can be blocked in the gap, so that when the user wears the neck fan, he / she can feel the airflow at the inner end 11 more strongly, which enhances the heat dissipation effect. In addition, the flexible neck support provides the user with a more comfortable support effect, improving the user experience.

[0054] In this embodiment, the width of the first air guide path gradually decreases towards the inner end of the first air outlet; the width of the first air guide path ranges from 1 to 5 cm; the length of the first air guide path ranges from 8 to 16 cm; and the depth of the first air guide path ranges from 0 to 3 cm.

[0055] In this embodiment, the first main body 101 includes a first outer shell 1011 and a first inner shell 1012. A first air guide 12 is disposed in the first inner shell 1012, and the first inner shell 1012 and the first outer shell 1011 are detachably connected by a snap-fit. It can be understood that the above structural design allows users to easily open and install the first main body 101, facilitating user maintenance.

[0056] In this embodiment, the diameter of the first air inlet 22 is in the range of 30mm-60mm, and the diameter of the first air outlet 23 is in the range of 30mm-60mm. This appropriate diameter range helps to achieve a balanced airflow, allowing the fan to provide sufficient airflow to maintain a high cooling effect. It also contributes to a more rational overall structure, making it easier to carry and use.

[0057] In this embodiment, the lower end of the neck fan is further provided with a cylindrical second air guide cavity 4. The second air guide cavity 4 includes a second air inlet 42 disposed at the lower end of the neck body 1 and a second air outlet 43 disposed opposite to the second air inlet 42. The second air outlet 43 is disposed towards the inner end 11. The neck fan also includes a second fan assembly 5 disposed in the second air guide cavity 4. The second fan assembly 5 is used to drive airflow from the second air inlet 42 through the second air outlet 43 to the inner end 11. With the above structure, since the second air guide cavity 4 is cylindrical, the neck fan forms a vertically blowing direct-blowing fan, which allows the second fan assembly 5 to drive airflow from the second air inlet 42 through the second air outlet 43 to the inner end 11, greatly improving the blowing efficiency. Users can more directly feel the cool airflow when using the neck fan, improving the overall performance of the fan. Furthermore, since the second air guide cavity 4 is a straight cylindrical cavity integrally formed and protruding from the neckband body 1, this design enhances the overall aesthetics and design sense of the product, and helps to improve the wearing comfort of the neckband fan, thereby improving the overall quality and user experience of the product. It can be understood that the second fan assembly 5 is disposed in the second body portion 102.

[0058] In this embodiment, the neck fan (such as the second main body 102) has a recessed second air guide 13, which extends from the second air outlet 43 to the inner end portion 11. The second fan assembly 5 drives airflow to exit from the second air outlet 43 and blow it along the second air guide 13 toward the inner end portion 11. Furthermore, the inner end portion 11 is connected to a flexible second neck support 112, and a second air inlet gap 131 is formed between the second neck support 112 and the inner end portion 11. The second fan assembly 5 drives airflow to exit from the second air outlet 43 and blow it along the second air guide 13 toward the second air inlet gap 131. The second neck support 112 can be a silicone neck support, a plastic neck support, a rubber neck support, etc. With the above structure, when the airflow is blown out from the second air outlet 43, under the guidance of the concave second air guide 13, the airflow will blow along the second air guide 13 to the inner end 11. And due to the second air inlet gap 131, the airflow can be blocked in the gap, so that when the user wears the neck fan, he / she can feel the airflow at the inner end 11 more strongly, which enhances the heat dissipation effect. In addition, the flexible neck support provides the user with a more comfortable support effect, improving the user experience.

[0059] In this embodiment, the second main body 102 includes a second outer shell 1021 and a second inner shell 1022. The second air guide 13 is disposed in the second inner shell 1022, and the second inner shell 1022 and the second outer shell 1021 are detachably connected by a snap-fit. This allows the user to easily open and install the second main body 102, facilitating user maintenance.

[0060] This embodiment also includes a first power supply component 8, located within the neckband body 1. The first power supply component 8 is electrically connected to the first fan assembly 3 to supply power to the first fan assembly 3. The first power supply component 8 includes a first battery 81 and a first circuit board 82, with the first battery 81 electrically connected to the first circuit board 82 to supply power to the first circuit board 82. It also includes a second power supply component 9, located within the neckband body 1. The second power supply component 9 is electrically connected to the second fan assembly 5 to supply power to the second fan assembly 5. The second power supply component 9 includes a second battery 91 and a second circuit board 92, with the second battery 91 electrically connected to the second circuit board 92 to supply power to the second circuit board 92. With this structure, placing the first power supply component 8 within the neckband body 1 improves the overall aesthetics of the neckband fan and effectively supplies power to the first fan assembly 3, ensuring product reliability. Similarly, placing the second power supply component 9 within the neckband body 1 also improves the overall aesthetics of the neckband fan and effectively supplies power to the second fan assembly 5, ensuring product reliability.

[0061] In this embodiment, the first fan assembly 3 includes a first fan housing 31, a first motor 32 fixedly installed inside the first fan housing 31, and a first fan blade 33 installed on the output shaft of the first motor 32. The first fan housing 31 is provided with a third air inlet 311, a first air duct 312, and a third air outlet 313. The first air inlet 22, the third air inlet 311, the first air duct 312, the third air outlet 313, the first air guide cavity 2, and the first air outlet 23 are sequentially connected. Through the above structural design, the first fan assembly 3 in this embodiment has an independent outer shell, which facilitates the individual installation and replacement of the fan.

[0062] In another embodiment, the first fan assembly 3 includes a first motor 32 and a first fan blade 33 mounted on the output shaft of the first motor 32; a first air inlet 22 is connected to a first air inlet shroud 221, the first air inlet shroud 221 having a plurality of first air inlet holes 222; a first air outlet 23 is connected to a first air outlet shroud 231, the first air outlet shroud 231 having a plurality of first air outlet holes 232. With the above structure, this configuration eliminates the need for a fan housing, saving costs, and effectively directs airflow. The design of the first air inlet shroud 221 and the first air outlet shroud 231 helps prevent other debris, such as hair and paper scraps, from being sucked into the fan, thus contributing to the fan's safety.

[0063] In this embodiment, the second fan assembly 5 includes a second fan housing 51, a second motor 52 fixedly installed inside the second fan housing 51, and a second fan blade 53 installed on the output shaft of the second motor 52. The second fan housing 51 is provided with a fourth air inlet 42, a second air duct 512, and a fourth air outlet 513. The second air inlet 42, the fourth air inlet 511, the second air duct 512, the fourth air outlet 513, the second air guide cavity 4, and the first air outlet 23 are sequentially connected. Through the above structural design, the first fan assembly 3 in this embodiment has an independent outer shell, which facilitates the individual installation and replacement of the fan.

[0064] In other embodiments, the second fan assembly 5 includes a second motor 52 and a second fan blade 53 mounted on the output shaft of the second motor 52; a second air inlet shroud 421 is connected to the second air inlet 42 and the fourth air inlet 511, and the second air inlet shroud 421 is provided with a plurality of second air inlet holes 422; a second air outlet shroud 431 is connected to the second air outlet 43 and the fourth air outlet 513, and the second air outlet shroud 431 is provided with a plurality of second air outlet holes 432. With the above structure, the design of the fan housing is omitted, saving costs, and the airflow direction is effectively realized. The design of the second air inlet shroud 421 and the second air outlet shroud 431 helps to prevent other debris, such as hair and paper scraps, from being sucked into the fan, thus helping to maintain the safety of the fan.

[0065] In this embodiment, the connector 103 has a mounting hole 1031, the first main body 101 has a first connecting end 1013 connected to the connector 103, the first connecting end 1013 is detachably inserted into one end of the mounting hole 1031, and the second main body 102 has a second connecting end 1023 connected to the connector 103, the second connecting end 1023 is detachably inserted into the other end of the mounting hole 1031.

[0066] Furthermore, the first connecting end 1013 is provided with a first buckle 10131 with a concave-convex shape, the connector 103 is provided with a first slot 1032 that engages with the first buckle 10131, the second connecting end 1023 is provided with a second buckle 10331 with a concave-convex shape, and the connector 103 is provided with a second slot 10231 that engages with the second buckle 10331. With the above structure, the connector 103 is a flexible silicone connector. After the connector 103 is bent to a certain angle, the first main body 101 and the second main body 102 can be easily inserted into the mounting hole 1031. The first main body 101 is engaged with the first slot 1032 on the inner wall of the connector 103 through the concave-convex shape of the first buckle 10131 provided at the first connecting end 1013. The second main body 102 is engaged with the second slot 10231 on the inner wall of the connector 103 through the concave-convex shape of the second buckle 10331 provided at the second connecting end 1023. This allows the first main body 101 and the second main body 102 to be easily installed and connected to form a complete neck fan.

[0067] As shown in Figures 3-6, the connector 103 can be divided into a flexible connecting portion 103a, which may have at least one mounting hole 1031. The at least one mounting hole 1031 extends along the extending direction D1 from the first connecting end 1013 of the first main body portion 101 to the second connecting end 1023 of the second main body portion 102, and is used to fit and fix to the first connecting end 1013 and the second connecting end 1023, so that the first main body portion 101 and the second main body portion 102 are connected through the flexible connecting portion 103a. Connecting the first main body portion 101 and the second main body portion 102 through the flexible connecting portion 103a creates a flexible connection between them, thus facilitating user wear.

[0068] In this embodiment, the flexible connecting part 103a has a through mounting hole, that is, a through mounting hole provided along the extension direction D1. The two ends of the mounting hole 103a are respectively used to fit and fix the first connecting end 1013 and the second connecting end 1023. Using a single through mounting hole is simple and provides flexible assembly space. However, in a modified embodiment, the flexible connecting part 103a may also have two oppositely arranged blind holes (i.e., non-through holes), which are respectively used to fit and fix the first connecting end 1013 and the second connecting end 1023.

[0069] In one embodiment, the inner wall of the at least one mounting hole 1031 is provided with a first anti-detachment structure (such as a second slot 1023a) and a second anti-detachment structure (such as a second slot 1023b). The first anti-detachment structure is used to engage with a first buckle 10131 on the outer surface of the first connecting end 1013, and the second anti-detachment structure is used to engage with a second buckle 10331 on the outer surface of the second connecting end 1023. At least one of the first anti-detachment structure and the first buckle 10131 includes a plurality of protrusions and recesses arranged sequentially along the extension direction D1.

[0070] Specifically, in this embodiment, the first anti-detachment structure includes a plurality of second slots 1023a arranged along the extension direction for engaging with a plurality of protrusions of the first buckle 10131 arranged along the extension direction; the second anti-detachment structure includes a plurality of second slots 1023b arranged along the extension direction for engaging with a plurality of protrusions of the second buckle 10331 arranged along the extension direction; the first anti-detachment structure is detachably connected to the first buckle 10131, and the second anti-detachment structure is detachably connected to the second buckle 10331.

[0071] In one embodiment, the flexible connection portion 103a is arc-shaped and has an inner side for approaching the human neck and an outer side for away from the human neck. The first anti-detachment structure is disposed on the inner sidewall adjacent to the outer side at one end of the at least one mounting hole 1031; the second anti-detachment structure is disposed on the inner sidewall adjacent to the outer side at the other end of the at least one mounting hole 1031.

[0072] In one embodiment, the flexible connecting portion 103a is further provided with a first fixing structure 103b and a second fixing structure 103c. The first fixing structure 103b and the second fixing structure 103c are respectively disposed at both ends of the flexible connecting portion 103a. The first fixing structure 103b is used to connect with the third fixing structure 1013a of the first connecting end 1013, and the second fixing structure 103c is used to connect with the fourth fixing structure 1023a of the second connecting end 1023. The first fixing structure 103b is used to be detachably connected with the third fixing structure 1013a, and the second fixing structure 103c is used to be detachably connected with the fourth fixing structure 1023a.

[0073] In one embodiment, one of the first fixing structure 103b and the third fixing structure 1013a is a first fixing post 141, and one of the first fixing structure 103b and the third fixing structure 1013a is a first fixing hole 142; one of the second fixing structure 103c and the fourth fixing structure 1023a is a second fixing post 143, and one of the second fixing structure 103c and the fourth fixing structure 1023a is a second fixing hole 144; the first fixing structure 103b extends along a first tangential direction perpendicular to the extension direction (D2), and the second fixing structure extends along a second tangential direction perpendicular to the extension direction (D3).

[0074] In one embodiment, the first fixing post 141 includes a first post body 1411 and a first hook portion 1412 connected to the end of the first post body 1411 away from the flexible connecting portion 103a. The outer diameter of the first hook portion 1412 is larger than the outer diameter of the first post body 1411 to prevent the first fixing post 141 from disengaging from the first fixing hole 142. The second fixing post 143 includes a second post body 1431 and a second hook portion 1432 connected to the end of the second post body 1431 away from the flexible connecting portion 103a. The outer diameter of the second hook portion 1432 is larger than the outer diameter of the second post body 1431 to prevent the second fixing post 143 from disengaging from the second fixing hole 144.

[0075] In one embodiment, the first fixing hole 142 includes a first portion 1421 corresponding to the first column 1411 and a second portion 1422 corresponding to the first hook portion 1412, wherein the diameter of the second portion 1422 is larger than the diameter of the first portion 1421; the second fixing hole 144 includes a third portion 1441 corresponding to the second column 1431 and a fourth portion 1442 corresponding to the second hook 1432, wherein the diameter of the fourth portion 1442 is larger than the diameter of the third portion 1441.

[0076] In one embodiment, the connector 103 may also be provided with at least one neck support (such as a first neck support 111 and a second neck support 112). The at least one neck support is connected to the inner side of the flexible connector 103a that is close to the human neck. The at least one neck support is used to form at least one air inlet gap with the first main body 101 or the second main body 102, so that the air from the first main body 101 or the second main body 102 can enter the air inlet gap (such as 121, 131), thereby avoiding the situation where the human neck is in direct contact with the first main body 101 or the second main body 102, resulting in the air not being able to be provided to the surface of the neck skin.

[0077] As shown above, in this embodiment, the at least one neck support includes a first neck support 111 and a second neck support 112. The first neck support 111 is disposed adjacent to the first main body portion 101 and is used to form a first air inlet gap 121 between itself and the first main body portion 101. The second neck support 112 is disposed adjacent to the second main body portion 102 and is used to form a second air inlet gap 131 between itself and the second main body portion 102.

[0078] In one embodiment, the surfaces of the first neck brace 111 and the second neck brace 112 away from the flexible connection portion 103a also have a plurality of protrusions 103m. The plurality of protrusions 103m are used to create a gap between the at least one neck brace and the skin of the human neck, and also to prevent the human neck from directly contacting the first main body portion 101 or the second main body portion 102, which would prevent wind from being delivered to the surface of the neck skin.

[0079] It can be seen that the surfaces of the first neck support 111 and the second neck support 112 away from the flexible connecting part 103a are arc-shaped surfaces, and the size of the plurality of protrusions 103b can gradually decrease from the middle to both ends along the vertical direction D4 perpendicular to the extension direction D1, thereby achieving a more comfortable wearing effect.

[0080] In this embodiment, the flexible connecting part 103a, the first neck support part 111 and the second neck support part 112 are all made of flexible materials. If they are all made of the same flexible material (such as flexible silicone material) and are integrally molded, a more comfortable wearing effect can be achieved.

[0081] Further, the flexible connection portion 103a includes a main body portion 103d, a first extension portion 103e, and a second extension portion 103f. The main body portion 103d has at least one mounting hole 1031. The first extension portion 103e and the second extension portion 103f are respectively connected to the two ends of the main body portion 103d, and the first extension portion 103e and the second extension portion 103f protrude from the main body portion 103d along the extension direction D1. The first extension portion 103e and the second extension portion 103f are respectively used to cover the inner surface of the first connection end 1013 and the inner surface of the second connection end 1023 that are close to the neck of the human body. The first fixing structure and the second fixing structure are respectively disposed in the first extension 103e and the second extension 103f, so that the first fixing structure and the second fixing structure are close to the inner side of the human neck, and the first anti-detachment structure and the second anti-detachment structure are located on the outer side away from the human neck. The inner and outer cooperation can make the connector 103 reliably connect the first main body 101 and the second main body 102, and prevent the connection from easily detaching.

[0082] In this embodiment, the first air guide cavity 2 is located inside the first main body portion 101, and the first main body portion 101 is also provided with a first mounting cavity 1014, and the first power supply component 8 is located inside the first mounting cavity 1014; the second air guide cavity 4 is located inside the second main body portion 102, and the second main body portion 102 is also provided with a second mounting cavity 1024, and the second power supply component 9 is located inside the second mounting cavity 1024.

[0083] In this embodiment, the first main body 101 is further provided with a first push-button switch 1015, a first charging interface 1016, and a first indicator light module 1017, all of which are electrically connected to the first power supply component 8. The second main body 102 is further provided with a second push-button switch 1025, a second charging interface 1026, and a second indicator light module 1027, all of which are electrically connected to the second power supply component 9. With the above structure, the first push-button switch 1015 and the second push-button switch 1025 are used to start or stop the neck fan, the first charging interface 1016 and the second charging interface 1026 are used to charge the first battery 81 and the second battery 91, respectively, and the first indicator light module 1017 and the second indicator light module 1027 can respectively indicate whether the fan is on or off, and can also display the fan output wind speed level.

[0084] In this embodiment, as shown in Figures 7-13, the neck fan also includes a first charging control module 811, a first battery protection module 812, a first charging indicator module 813, a first main control module 814, and a first boost module 815, all electrically connected to the first circuit board 82.

[0085] The first charging interface 1016 and the first charging control module 811 are both electrically connected to the first battery 81. The first charging indicator module 813 is connected to the first charging control module 811. The first charging interface 1016 and the first charging control module 811 are used to charge the first battery 81. The first charging indicator module 813 is used to display the charging status. The first battery protection module 812 is electrically connected to the first charging control module 811 and the first battery 81 to protect the first battery 81.

[0086] The first main control module 814, the first boost module 815, and the first motor 32 are all electrically connected to the first battery 81. The first button switch 1015 and the first indicator light module 1017 are electrically connected to the first main control module 814. The first indicator light module 1017 is used to indicate whether the neck fan is on or off.

[0087] In this embodiment, the neck fan also includes a second charging control module 921, a second battery protection module 922, a second charging indicator module 923, a second main control module 924, and a second boost module 925, all electrically connected to the second circuit board 92.

[0088] The second charging interface 1026 and the second charging control module 921 are both electrically connected to the second battery 91. The second charging indicator module 923 is connected to the second charging control module 921. The second charging interface 1026 and the second charging control module 921 are used to charge the second battery 91. The second charging indicator module 923 is used to display the charging status. The second battery protection module 922 is electrically connected to the second charging control module 921 and the second battery 91 to protect the second battery 91.

[0089] The second main control module 924, the second boost module 925, and the second motor 52 are all electrically connected to the second battery 91. The second button switch 1025 and the second indicator module 1027 are electrically connected to the second main control module 924. The second indicator module 1027 is used to indicate whether the neck fan is on or off.

[0090] In this embodiment, the first main body 101 is provided with a first conductive terminal 1018, and the second main body 102 is provided with a second conductive terminal 1019. The first conductive terminal 1018 and the second conductive terminal 1019 are connected. The first button switch 1015 is electrically connected to the first main control module 814 and the second main control module 924 respectively. The second button switch 1025 is electrically connected to the first main control module 814 and the second main control module 924 respectively. The first button switch 1015 or the second button switch 1025 is used to send a third fan working signal.

[0091] The first main control module 814 is used to receive the working signal of the third fan and drive the first boost module 815 to receive and increase the output voltage of the first battery 81 so as to drive the first motor 32 to work.

[0092] The second main control module 924 is used to receive the working signal of the third fan and drive the second boost module 925 to receive and increase the output voltage of the second battery 91 to drive the second motor 52 to work.

[0093] As can be understood, as shown in Figure 14, in one embodiment, the operation of either the first switch 1015 or the second switch 1025 by the user can generate a third fan operating signal, causing both the first motor 32 and the second motor 52 to operate. Specifically, the first conductive terminal 1018 of the first main body 101 may have a connector J1 for connection with the connector J1 of the second conductive terminal 1019 of the second main body 102, thereby realizing the electrical connection between the first main control module 814 and the second main control module 924, and thus enabling the operation of either the first switch 1015 or the second switch 1025 by the user to generate a third fan operating signal. Specifically, the connector J1 may have two signal terminals, but is not limited to the above.

[0094] It is understood that when there is no connection between the connector J1 of the first conductive end 1018 of the first main body 101 and the connector J1 of the second conductive end 1019 of the second main body 102, that is, when the first main body 101 and the second main body 102 are independent, the first switch 1015 and the second switch 1025 can independently control the operation of the two fan assemblies, and the two do not affect each other.

[0095] Furthermore, in some other embodiments, through preset program control, the control of the two fan assemblies can be dominated by either the first switch 1015 or the second switch 1025 as needed. Specifically, in another embodiment, a third fan operating signal is issued only when one of the first switch 1015 and the second switch 1025 (such as the first switch) is operated by the user, so that the first motor 32 and the second motor 52 operate simultaneously.

[0096] Specifically, as shown in Figures 13 and 14, the first switch 1015 and the second switch 1025 may include an operation switch S1, which may be a push-button switch. In other embodiments, as shown in Figure 15, the first switch 1015 and the second switch 1025 may also include a stepless adjustment key P1 (such as a knob or slide adjustment key) that can be infinitely adjusted. The stepless adjustment key P1 can control the speed of the fan assembly, thereby controlling the wind force. The stepless adjustment key P1 includes, but is not limited to, stepless adjustment devices such as potentiometers and encoders with variable resistance. In one embodiment, the stepless adjustment key P1 may have multiple connection terminals and at least one adjustment pin. One of the multiple connection terminals may be grounded, and at least one adjustment pin can be operated by the user to cause the other connection terminals to output corresponding stepless adjustment signals. In other embodiments, multiple stepless adjustment pins can be provided to increase the adjustment range and functions. It can be understood that the stepless adjustment key P1 allows users to control the wind force of the neck fan according to their own needs, improving the user experience.

[0097] Further, in some embodiments, the first switch 1015 or the second switch 1025 is used for user operation, such as pressing, touching, sliding, scrolling, or one or more of these actions. As shown in Figures 13 and 14, the operation switch S1 can be a push-button switch. Further, the operation can include long-duration or short-duration operations. Specifically, the long-duration operation includes continuous operation for a duration exceeding a first preset time (e.g., 3 seconds), while the short-duration operation includes continuous operation for a duration within a second preset time (e.g., 1 second). The specific first and second preset times can be set according to actual needs. For example, when the operation is a long-duration operation, the first main control module 814 can control the power on or off of the corresponding first fan body (or the first fan body and the second fan body); when the first fan body (or the first fan body and the second fan body) is in the power-on state and the operation is a short-duration operation, the first main control module 814 can control the gear adjustment of the corresponding first fan body (or the first fan body and the second fan body).

[0098] Specifically, in one embodiment, after the neck fan enters the power-on state, the first main control module 814 can control an internal counting unit or an externally connected counting unit to count the signal sent by the operation switch S1. When the current count is less than a preset number N (N can be set according to actual needs, such as 6), the first main control module 814 controls the speed of the fan assembly of the first fan body (or the first fan body and the second fan body) to increase by one level according to the signal sent by the operation switch S1. When the current count is equal to the preset number N, the first main control module 814 controls the speed of the fan assembly of the first fan body (or the first fan body and the second fan body) to reset to the minimum level according to the signal sent by the operation switch S1.

[0099] In another embodiment, the first main control module 814 may also, when the neck fan enters the power-on state and receives the signal from the operation switch S1, first determine, through an internal judgment unit or an externally connected judgment unit, whether the current gear of the first fan body (or the first fan body and the second fan body) is the maximum gear (i.e., whether the speed of the corresponding fan component is the maximum speed). If the current gear is the maximum gear, then control the current gear of the first fan body (or the first fan body and the second fan body) to jump to the minimum gear (i.e., the speed of the corresponding fan component jumps to the minimum speed); if the current gear is not the maximum gear, then control the current gear of the first fan body (or the first fan body and the second fan body) to increase by one gear, i.e., the speed of the corresponding fan component increases by one gear.

[0100] In the above embodiments, the fan assemblies of the first fan body and the second fan body can have multiple speed settings, specifically, such as six.

[0101] It is understood that when the first fan body and the second fan body are not electrically connected, the first fan body and the second fan body have the same structure and can work independently. When the first fan body and the second fan body are electrically connected as one unit, one of the first switch 1015 and the second switch 1025 (such as the first switch) will be operated by the user and will send a third fan working signal so that the first motor 32 and the second motor 52 work simultaneously.

[0102] In this embodiment, the first main body 101 and the second main body 102 can be regarded as a neck fan formed by two independent fans electrically connected together, wherein the circuit diagrams of the various circuit modules contained in the two independent fans are the same.

[0103] Through the above structure, the first main body 101 and the second main body 102 are combined to form a complete U-shaped neck fan. At this time, the first conductive end 1018 and the second conductive end 1019 are connected. Regardless of whether the user presses the first button switch 1015 or the second button switch 1025, a third fan working signal can be emitted. When the first main control module 814 receives the third fan working signal, it drives the first boost module 815 to receive and increase the output voltage of the first battery 81, thereby driving the first motor 32 to work. The rotation of the first motor 32 can drive the first fan blade 33 to rotate, realizing the blowing effect of the first fan assembly. When the second main control module 924 receives the third fan working signal, it drives the second boost module 925 to receive and increase the output voltage of the second battery 91, thereby driving the second motor 52 to work. The rotation of the second motor 52 can drive the second fan blade 53 to rotate, realizing the blowing effect of the second fan assembly.

[0104] It is understood that the first main control module 814 shown in Figure 11 and the related circuits such as the first boost module 815 shown in Figure 12 can also have other modified implementations. As shown in Figure 13, in one modified embodiment, the boost control chip U2 of the first boost module 815 can be omitted. Specifically, the first boost module 815 may include an inductor L1 and a switching element Q2. The control terminal of the MCU of the first main control module 814 is connected to the control terminal of the switching element Q2. The first conducting terminal of the switching element Q2 is connected to the battery BAT through the inductor L1, and the second conducting terminal of the switching element Q2 is grounded. The first conducting terminal of the switching element Q2 is connected to the first motor MG1. Specifically, the first conducting terminal of the switching element Q2 is connected to the first motor MG1 through the diode D4. The MCU of the first main control module 814 controls the switching element Q2 to turn on and off, thereby boosting the voltage from the battery BAT through the inductor L1 and providing the boosted voltage to the first motor MG1 to drive the first fan blade 33 to rotate. As mentioned earlier, the second main control module 924 and the second boost module 925 can also use the same circuit structure as shown in Figure 13 to provide the boosted voltage to the second motor to drive the second fan blade 53 to rotate. This will not be described again here.

[0105] Example 2

[0106] Referring to Figures 16 to 18, the difference between Embodiment 2 and Embodiment 1 is that the first main body 101 and the second main body 102 of the neck fan are disassembled to form two independent fans. The first main body 101 and the second main body 102 are two small fans that can work independently.

[0107] In this embodiment, the first main body 101 includes a first charging control module 811, a first battery protection module 812, a first charging indicator module 813, a first main control module 814, and a first boost module 815, which are electrically connected to the first circuit board 82.

[0108] The first charging interface 1016, the first charging control module 811, and the first charging indicator module 813 are all electrically connected to the first battery 81. The first charging interface 1016 and the first charging control module 811 are used to charge the first battery 81, and the first charging indicator module 813 is used to display the power level of the first battery 81. The first battery protection module 812 is electrically connected to the first charging control module 811 and the first battery 81 to protect the first battery 81.

[0109] The first main control module 814, the first boost module 815, and the first motor 32 are all electrically connected to the first battery 81. The first push-button switch 1015 and the first indicator light module 1017 are electrically connected to the first main control module 814. The first push-button switch 1015 is used to send a first fan working signal. The first main control module 814 is used to receive the first fan working signal and drive the first boost module 815 to receive and increase the output voltage of the first battery 81 to drive the first motor 32 to work. The first indicator light module 1017 is used to indicate whether the neck fan is on or off.

[0110] With the above structure, the first charging interface 1016 is used to charge the first battery 81, the first charging control module 811 is used to control the charging of the first battery 81, and when the first button switch 1015 is turned on, it sends a first fan working signal. When the first fan working signal is received, the first main control module 814 drives the first boost module 815 to receive and increase the output voltage of the first battery 81 so as to drive the first motor 32 to work. The first main control module 814 can also adjust the speed of the first motor 32 by controlling the output voltage of the first boost module 815.

[0111] In this embodiment, the second main body 102 includes a second charging control module 921, a second battery protection module 922, a second charging indicator module 923, a second main control module 924, and a second boost module 925, which are electrically connected to the second circuit board 92.

[0112] The second charging interface 1026, the second charging control module 921, and the second charging indicator module 923 are all electrically connected to the second battery 91. The second charging interface 1026 and the second charging control module 921 are used to charge the second battery 91, and the second charging indicator module 923 is used to display the power level of the second battery 91. The second battery protection module 922 is electrically connected to the second charging control module 921 and the second battery 91 to protect the second battery 91.

[0113] The second main control module 924, the second boost module 925, and the second motor 52 are all electrically connected to the second battery 91. The second push-button switch 1025 and the second indicator light module 1027 are electrically connected to the second main control module 924. The second push-button switch 1025 is used to send a second fan working signal. The second main control module 924 is used to receive the second fan working signal and drive the second boost module 925 to receive and increase the output voltage of the second battery 91 to drive the second motor 52 to work. The second indicator light module 1027 is used to indicate whether the neck fan is on or off.

[0114] With the above structure, the second charging interface 1026 is used to charge the second battery 91, and the second charging control module 921 is used to control the charging of the second battery 91. When the second push-button switch 1025 is turned on, it sends a second fan operating signal. When the second fan operating signal is received, the second main control module 924 drives the second boost module 925 to receive and increase the output voltage of the second battery 91 to drive the second motor 52. The second main control module 924 can also adjust the speed of the second motor 52 by controlling the output voltage of the second boost module 925. The above structural design effectively achieves the effect that after the neck fan is disassembled, the individual part can be used as an independent fan, bringing more flexibility and allowing users to choose the appropriate usage method according to specific needs.

[0115] Example 3

[0116] Referring to Figures 19 to 26, this embodiment three provides a neck fan. It can be understood that the above descriptions of embodiments one and two can be basically applied to the neck fan of embodiment three. The following mainly describes the key parts of embodiment three and the differences from embodiments one and two.

[0117] The neck fan includes a neck body 1, which includes a first main body portion 101, a second main body portion 102, a connector 103 connecting the first main body portion 101 and the second main body portion 102, a first fan assembly 3 disposed at one end of the first main body portion 101 away from the connector 103, and a second fan assembly 5 disposed at one end of the second main body portion 102 away from the connector 103.

[0118] The connector 103 is detachably connected to both the first main body part 101 and the second main body part 102. The first main body part 101 is detachably connected to the first fan assembly 3, and the second main body part 102 is detachably connected to the second fan assembly 5. Thus, all five parts of the neck fan are detachably connected, forming a modular design. This not only facilitates assembly but also reduces assembly and maintenance costs. Furthermore, users can disassemble, assemble, store, and DIY their own devices, improving the user experience.

[0119] The first main body portion 101 has an arc-shaped structure, including a concave first air guide 12 disposed on one side surface of the first main body portion 101 and extending along the extension direction of the arc-shaped structure. The first fan assembly 3 is disposed at one end of the first main body portion 101 and is used to blow air toward the first air guide 12. The first air guide 12 is used to guide the air from the first fan assembly 3 to one side of the first main body portion 101 (i.e., the side of the user's neck) and the end of the first main body portion 101 away from the first fan assembly 3 (such as the back of the user's neck).

[0120] The second main body portion 102 has an arc-shaped structure, including a concave second air guide 13 disposed on one side surface of the second main body portion 102 and extending along the extension direction of the arc-shaped structure. The second fan assembly 5 is disposed at both ends of the second main body portion 102 and is used to blow air toward the second air guide 13. The second air guide 13 is used to guide the air from the second fan assembly 5 to one side of the second main body portion 102 (i.e., the other side of the user's neck) and the end of the second main body portion 102 away from the second fan assembly 5 (such as the back of the user's neck).

[0121] Furthermore, the first main body 101 and the first fan assembly 3 can also be assembled into one unit to form a first portable fan, and the second main body 102 and the second fan assembly 5 can also be assembled into one unit to form a second portable fan. Thus, a neck fan can be disassembled into two portable fans for use according to the user's needs. It can be understood that when used as a neck fan, the portable fan and the other portable fan are respectively positioned on either side of the user's neck. Disassembling a neck fan into two portable fans according to the user's needs enriches the usage scenarios, facilitates storage, and enhances the user experience.

[0122] The first fan assembly 3 includes a cylindrical first fan housing 31, which is detachably connected to the neck hanger body 1 and located in the first receiving cavity 15. The first fan housing 31 has a third air inlet 311 and a third air outlet 313.

[0123] With the above structure, since the first fan housing 31 is cylindrical, the neck fan forms a vertically blowing direct-blowing fan. The first fan assembly 3 can drive airflow from the third air inlet 311 through the third air outlet 313 along the first air guide path 12 to the user's neck, greatly improving the blowing efficiency. When using the neck fan, the user can more directly feel the cool air blowing directly onto their neck, improving the overall performance of the fan. Furthermore, since the first fan housing 31 and the neck hanger body 1 can be disassembled and assembled, they can be processed and assembled separately during the production process, improving production efficiency, reducing production costs, and facilitating storage and transportation, thus improving the product's portability.

[0124] In this embodiment, the first main body portion 101 of the neckband body 1 has a plurality of connecting slots 151 on its inner side near the first receiving cavity 15, and the outer wall of the first fan housing 31 has a plurality of connecting buckles 315 that match and engage with the connecting slots 151. The first fan housing 31 and the neckband body 1 are detachably connected by the buckles. Specifically, the connecting slots 151 are symmetrically distributed on the inner side of the neckband body 1, with six sets of connecting slots 151, and two connecting slots 151 in each set; the connecting buckles 315 are symmetrically distributed on the outer wall of the first fan housing 31, with six sets of connecting buckles 315, and two connecting buckles 315 in each set. With the above structure, the user can manually install or remove the first fan housing 31 from the neckband body 1. The six sets of buckle engagement structure ensure the firmness of the splicing and prevent the first fan housing from detaching during wear and use, thus improving the safety and convenience of the neckband fan.

[0125] In this embodiment, the first main body portion 101 of the neck hanger body 1 is detachably connected to the outer side away from the first receiving cavity 15 with a first outer cover 16. Similar to Embodiment 1, the first main body portion 101 of the neck hanger body is provided with a first mounting cavity 1014, the first power supply component 8 is located in the first mounting cavity 1014, the first mounting cavity 1014 has an opening, and the first outer cover 16 is detachably closed with the opening.

[0126] In this embodiment, the first fan assembly 3 further includes a first motor 32 and a first fan blade 33 mounted on the output shaft of the first motor 32.

[0127] The first fan housing 31 may include a housing body 31a, an air inlet cover 31b, a metal mesh 3111, and an air outlet cover 31c.

[0128] The first fan blade 33 and the first motor 32 are both installed in the housing body 31a. Specifically, the housing body 31a includes a cylindrical side wall structure 310a, a mounting part 310b located at one end of the side wall structure 310a, and an air guide part 310c connecting the mounting part 310b and the side wall structure 310a. The first fan blade 33 and the first motor 32 are disposed in the side wall structure 310a and located on one side of the mounting part 310b. The first motor 32 is mounted on the mounting part 310b.

[0129] The air guide section 310c includes multiple spaced air guide blades 310d, used to guide the air from the first fan blade 33 in a preset direction. Specifically, the thickness of each air guide blade 310d can gradually increase along the direction from the first fan blade 33 to the third air outlet 313, thereby achieving a better air guiding effect. The air inlet cover 31b can be annular, and the air inlet cover 31b can be sleeved on one end of the housing body 31a. Specifically, the outer side of one end of the housing body 31a can have a stepped groove 31f, and the air inlet cover 31b is sleeved and installed in the stepped groove 31f, so that after installation, the outer side of the air inlet cover 31b is flush with the outer side of the housing body 31a. The metal mesh 3111 can be installed on the inner side of the air inlet cover 31b.

[0130] The third air inlet 311 is provided on the metal mesh 3111. The third air inlet 311 includes multiple air inlet holes 311a, each of which can be circular, and the diameter of the multiple air inlet holes 311a can be the same. The diameter of each air inlet hole 311a can be in the range of 0.5mm to 4mm. This size can prevent hair or other objects from getting into the first fan assembly 3. It can be understood that the metal mesh 3111 is thin and lightweight, which is beneficial to the miniaturization and weight reduction of the product. In addition, since it is made of metal, the size of the air inlet holes of the metal mesh 3111 can be set to be small, thereby effectively preventing foreign objects from entering the first fan assembly 3.

[0131] The third air outlet 313 includes a plurality of air outlet holes 3130 disposed on the air outlet shroud 31c. Specifically, the air outlet shroud 31c includes an annular wall structure 31g, a mounting structure 31h, and a plurality of air outlet plates 3131. The plurality of air outlet plates 3131 are connected between the annular wall structure 31g and the mounting structure 31h, and the plurality of air outlet holes 3130 are defined between the plurality of air outlet plates 3131.

[0132] The inner surface of the annular wall structure 31g is an inclined or arc-shaped surface, so that the inner diameter of the annular wall structure 31g gradually decreases along the direction from the third air inlet 311 to the third air outlet 313, thereby pressurizing the blown air and increasing the air outlet intensity. The mounting structure 31h includes an annular mounting wall 31i, a cover plate 31j connecting the mounting wall 31i, and a mounting post 31k connecting the inner side of the cover plate 31j. The mounting post 31k connects to the mounting part 310b. Specifically, the mounting post 31k can be detachably inserted into the mounting hole of the mounting part 310b, so that the air outlet cover 31c and the housing body 31a form a detachable connection. The cover plate 31j is circular and located in the middle of the plurality of air outlets 3130. The outer surface of the cover plate 31j may have a groove for converging the air outlet.

[0133] The mounting structure 31h is further provided with a first alignment structure 31m, and the mounting part 310b has a second alignment structure 31n. The first alignment structure 31m and the second alignment structure 31n cooperate to realize the alignment assembly of the housing body 31a and the air outlet hood 31c. The first alignment structure 31m and the second alignment structure 31n can be one, two or more. Specifically, one of the first alignment structure 31m and the second alignment structure 31n can be an alignment hole, and the other can be an alignment post that mates with the alignment hole.

[0134] The metal mesh 3111 prevents hair or debris from being sucked into the first fan housing, thus avoiding damage to the fan assembly and reducing the fan's airflow. The air outlet 3131 concentrates the airflow directed towards the user's neck, improving airflow performance.

[0135] The first main body 101 also includes at least one air guide 101h, which is disposed in the first air guide path 12 and adjacent to the first fan assembly 3, for guiding the airflow of the first fan assembly 3.

[0136] In this embodiment, there are two air guide vanes 101h, which are respectively arranged on both sides of the first air guide path 12, and the distance between the two air guide vanes 101h gradually increases along the air outlet direction of the first air guide path 12.

[0137] In this embodiment, a first conductive through hole 152 is provided on the inner side of the neckband body near the first receiving cavity 15. The first conductive through hole 152 is used for the wires of the first fan assembly 3 to pass through and communicate with the first power supply assembly 8. The mounting part 310b may have an opening 310e, through which the wires connecting the motor can extend and then be connected to the first power supply assembly 8 via the first conductive through hole 152.

[0138] With the above structure, when it is necessary to assemble the neck fan, firstly open the first outer cover 16, then pass the wire of the first fan assembly 3 through the first conductive through hole 152 and connect it to the first power supply assembly 8 in the first mounting cavity 1014. Then close the first outer cover 16. After the wire of the first fan assembly 3 is connected, connect the first fan housing to the neck body through the connection buckle 315 and the connection slot 151. Finally, a direct-blowing neck fan that is conductive to the neck body 1 and easy to install is obtained.

[0139] In this embodiment, the lower end of the second main body portion 102 of the neck hanger body is further recessed into a second receiving cavity 17 on the side opposite to the first receiving cavity 15; it also includes a second fan assembly 5, which includes a cylindrical second fan housing 51. The second fan housing 51 is detachably connected to the neck hanger body and located within the second receiving cavity 17. The second fan housing 51 has a fourth air inlet 511 and a fourth air outlet 513. The second fan assembly 5 is used to drive airflow from the fourth air inlet 511 through the fourth air outlet 513 to the inner end. Through the above structure, similarly, since the second fan housing 51 is cylindrical, the neck hanger fan forms a vertically blowing direct-blowing fan. The second fan assembly can drive airflow from the fourth air inlet 511 through the fourth air outlet 513 to the inner end 11, greatly improving the blowing efficiency. When using the neck hanger fan, the user can more directly feel the cool wind blowing directly to the neck, improving the overall performance of the fan. Furthermore, since the second fan housing 51 and the neck hanger body 1 can be disassembled and assembled, they can be processed and assembled separately during the production process, which improves production efficiency, reduces production costs, and facilitates storage and transportation, thus improving the portability of the product.

[0140] In this embodiment, the second main body portion 102 of the neck hanger body is provided with a plurality of connecting slots 151 on the inner side near the second receiving cavity 17, and the outer wall of the second fan housing 51 is provided with a plurality of connecting buckles 315 that match and engage with the connecting slots 151. The second fan housing 51 and the neck hanger body 1 are detachably connected by the buckles. Specifically, the connecting slots 151 are symmetrically distributed on the inner side of the second main body portion 102 of the neck hanger body, and there are six sets of connecting slots 151, with two connecting slots 151 in each set; the connecting buckles 315 are symmetrically distributed on the outer wall of the first fan housing, and there are six sets of connecting buckles 315, with two connecting buckles 315 in each set.

[0141] In this embodiment, a second outer cover 18 is detachably connected to the outer side of the second main body portion 102 of the neck hanger body away from the second receiving cavity 17. Similar to Embodiment 1, the second main body portion 102 of the neck hanger body 1 is provided with a second mounting cavity 1024, the second power supply component 9 is located in the second mounting cavity 1024, the second mounting cavity 1024 has an opening, and the second outer cover 18 is detachably closed with the opening.

[0142] Furthermore, the specific structure of the second fan assembly 5 can be the same as that of the first fan assembly 3, including a second motor 52 and a second fan blade 53 mounted on the output shaft of the second motor; the structure of the second fan housing 51 can be basically the same as that of the first fan housing 31, such as including a housing body 31a, an air inlet cover 31b, a metal mesh 3111, and an air outlet cover 31c, wherein the fourth air inlet 511 can also include multiple air inlet holes 311a disposed on the metal mesh 3111 of the second fan housing 51. The fourth air outlet can also include multiple air outlet holes 3130 disposed on the air outlet cover 31c of the second fan housing 51. The specific structure of the second main body part 102 can be the same as that of the first main body part 101, and the second main body part 102 and the first main body part 101 can be symmetrically arranged, and the second fan assembly 5 and the first fan assembly 3 can also be symmetrically arranged, and the specific structure of the second fan housing 51 and the second main body part 102 will not be described again here.

[0143] In this embodiment, a second conductive through hole 171 is provided on the inner side of the neck hanger body near the second receiving cavity 17. The second conductive through hole 171 is used for the wires of the second fan assembly 5 to pass through and to communicate with the second power supply assembly 9.

[0144] With the above structure, after assembling the first fan housing 31, the second fan housing 51 is installed in the same way. First, the second outer cover 18 is opened, and then the wires of the second fan assembly 5 are passed through the second conductive through hole 171 and connected to the second power supply assembly 9 in the second mounting cavity 1024. Then, the second outer cover 18 is closed. After the wires of the second fan assembly 5 are connected, the second fan housing 51 is spliced ​​to the neck hanger body 1 by the snap-fit ​​of the connecting buckle 315 and the connecting slot 151, and finally a direct-blowing neck hanger fan that is conductive to the neck hanger body 1 and easy to install is obtained.

[0145] It is understood that the inner sides of the first outer cover 16 and the second outer cover 18 have at least one first fastener 160, and the outer sides of the first main body 101 and the second main body 102 have at least one second fastener 1010. The first fastener 160 and the second fastener 1010 engage to achieve the assembly of the first outer cover 16 and the first main body 101, as well as the assembly of the second outer cover 18 and the second main body 102. Specifically, there can be multiple first fasteners 160 and second fasteners 1010, such as 160a, 160b, 160c, 160d and 101a, 101b, 101c, 101d. The structures of the multiple first fasteners 160a, 160b, 160c, 160d can be different, and the multiple second fasteners 101a, 101b, 101c, 101d are structures that engage with the multiple first fasteners.

[0146] It is understood that both the first fan assembly 3 and the second fan assembly 5 are direct-blowing fan assemblies with air intake and exhaust on the same axis. In the first fan assembly 3, the air intake cover 31b, the first fan blade 33, the first motor 32, the housing body 31a, and the air outlet cover 31c are all arranged in a straight line. In the second fan assembly 5, the air intake cover 31b, the second fan blade 53, the first motor 32, the housing body 31a, and the air outlet cover 31c are all arranged in a straight line. This allows the first fan assembly 3 and the second fan assembly 5 to have greater airflow and better airflow effect.

[0147] Furthermore, as can be seen from Embodiments 1 and 2, the portable fan and the other portable fan can each have corresponding and independent push-button switches 1015 and 1025, so that the opening and closing of the portable fan and the other portable fan are independently controlled by the corresponding push-button switches 105 and 1025.

[0148] Furthermore, as shown in Figure 27, in a modified embodiment of Example 3, the air inlet 3110 of the metal mesh 311 can also be a regular hexagon, with multiple air inlets 3110 forming a honeycomb pattern. Adjacent air inlets 3110 share the same enclosure wall 311a. This design maximizes the air intake area of ​​the metal mesh 311, minimizes its weight, reduces wind resistance, and maximizes the air intake volume. Specifically, the width of the enclosure wall is in the range of 0.05mm-2mm.

[0149] Example 4

[0150] Please refer to Figures 28-31. Embodiment 4 of this application also provides a fan assembly 2', which has a structure that is basically the same as the first fan assembly 3 (or the second fan assembly 5) in Embodiments 1 to 3 above. The following mainly describes the differences between the two.

[0151] Specifically, in the fan assembly 2', the mounting part 252" includes a mounting plate 2521" and a mounting post 2522" that connects to the mounting plate 2521" and extends toward the mesh 27"; a blind hole 254" is provided on the mounting post 2522"; the motor 21" has a motor mounting hole 210" which is fitted onto the mounting post 2522" so that the motor 21" is mounted on the mounting post 2522".

[0152] The blind hole 254 is also provided with a fixed post 212 with a through hole 211 and a limiting ring 213. The output shaft 23 includes a main body 231 connecting the fan blade 22 and a limiting part 232 connecting the main body 231. The main body 231 of the output shaft 23 passes through the fixed post 212 and the limiting ring 213 in sequence, and the limiting part 232 is located at the end of the limiting ring 213 away from the fixed post 212. The limiting part 232 includes a rod part 2321 and a connecting rod part 2321 away from the fan blade. The limiting end 2322" at one end of the blade 22" has a diameter that gradually decreases in the direction away from the blade 22. The outer surface of the rod 2321" forms a limiting groove 2323 with the limiting end 2322" and the main body 231". The limiting ring 213" has a limiting hole 2130". The diameter of the limiting hole 2130" is larger than the diameter of the rod 2321" and smaller than the diameter of the main body 231" and smaller than the diameter of the limiting end 2322", so that the limiting ring 213" is limited in the limiting groove 2323".

[0153] The fixed post 212” can be a copper post, and the limiting ring 213” can be an elastic spring such as a torsion spring or a snap ring.

[0154] It is understood that, through the above structural design, the limiting ring 213” is limited in the limiting groove 2323”, and the output shaft 23” drives the fan blade 22” to move within the length range of the limiting groove 2323” along the extension direction of the output shaft 23”. Specifically, the output shaft 23” and the fan blade 22” respectively have the first limiting position shown in Figure 30 and the second limiting position shown in Figure 31, so that the fan blade 22” is suspended relative to the motor 21”. During the rotation of the output shaft 23” and the fan blade 22”, the limiting ring 213” can provide space for their movement, making the rotation of the output shaft 23” and the fan blade 22” smoother, thereby improving the service life of the fan assembly 2”. It is understood that the diameter of the limiting end 2322” gradually decreases in the direction away from the fan blade 22”, so that during assembly, the limiting end 2322” can pass through the through hole of the fixing post 212” and the limiting ring 213”, thereby locking and fixing with the limiting ring 213”.

[0155] Examples 5 and 6

[0156] As shown in Figures 32-35, the portable neck fan 1' provided in Embodiments 5 and 6 of this application has the same structural principle as that in Embodiments 1 to 3. The main difference between the two is that the fan assembly 2' is different. The fan assembly 2' in Embodiments 5 and 6 adopts a turbine blade assembly.

[0157] Specifically, the neck fan 1' includes a first fan body 11' and a second fan body 12' for being respectively positioned on both sides of a person's neck.

[0158] Both the first fan body 11' and the second fan body 12' include a housing 13' and a fan blade assembly 21'.

[0159] The outer casing 13' serves as the housing for the first fan body 11' and the second fan body 12'. The specific material of the outer casing 13' is not limited here, and designers can make a reasonable choice according to actual needs. For example, the material of the outer casing 13' can include, but is not limited to, plastics (such as ABS (Acrylonitrile-Butadiene-Styrene copolymer), PC (Polycarbonate) or PP (Polypropylene), silicone (such as food-grade or skin-friendly silicone) or metals (such as stainless steel or magnesium alloy), etc.

[0160] The outer casing 13' has an inner surface 131' and an outer surface 132'.

[0161] The inner surface 131' is the surface of the outer shell 13' closest to the human neck. The inner surface 131' includes a first part 1311' and a second part 1312'. The first part 1311' is located at one end of the inner surface 131'. One side of the second part 1312' is connected to the first part 1311', and the other side of the second part 1312' is connected to the junction of the first fan body 11' and the second fan body 12'. In other words, the first part 1311' is further away from the back of the human neck than the second part 1312'.

[0162] The outer surface 132' is the surface of the outer shell 13' that is away from the neck of the human body, and the outer surface 132' is set opposite to the inner surface 131'.

[0163] At least one of the first part 1311' and the outer surface 132' has an air inlet 133'; for example, only the first part 1311' may have an air inlet 133', only the outer surface 132' may have an air inlet 133', or both the first part 1311' and the outer surface 132' may have an air inlet 133'.

[0164] The second part 1312' is recessed on the side facing the outer surface 132' to form an external air guide duct 134' (which is basically the same as the structure and principle of the first air guide and the second air guide in embodiments one to three). An air outlet 135' is provided at the end of the external air guide duct 134' near the first part 1311'.

[0165] As shown in Figures 32-35, the fan blade assembly 21' (which has a basically the same structural principle as the first fan blade in Embodiments 1 to 3) is used to drive airflow. The fan blade assembly 21' is disposed in the housing 13' and located between the first part 1311' and the outer surface 132'. Here, the specific installation method between the fan blade assembly 21' and the housing 13' is not limited, and the designer can make a reasonable design according to actual needs. For example, the fan blade assembly 21' can be detachably connected to the housing 13' by at least one of the following methods: screw connection, snap connection, or plug connection. For another example, the fan blade assembly 21' can also be non-detachably connected to the housing 13' by riveting or gluing.

[0166] In this embodiment, the fan blade assembly 21' includes a turbine fan blade 211'. The fan shaft of the turbine fan blade 211' is arranged along the direction from the inner surface 131' to the outer surface 132'. The turbine fan blade 211' takes in air along its axial direction and exits air along its radial direction.

[0167] The turbine blades 211' are used to direct the air from the inlet 133' to the outlet 135', and the air from the outlet 135' is used to blow towards the human neck via the external air duct 134'. It is understandable that the side where the air inlet 133' of the outer casing 13' is located is the air intake side of the turbine blade 211', and the side where the air outlet 135' of the outer casing 13' is located is the air outlet side of the turbine blade 211'. The rotation of the turbine blade 211' drives the air flow to generate a pressure difference. The air intake side of the turbine blade 211' forms a low-pressure zone that draws in air from the air inlet 133', and the air outlet side of the turbine blade 211' forms a high-pressure zone that pushes air out of the air outlet 135', thus forming a continuous airflow. The external air guide duct 134' has a guiding function. The air flowing out of the air outlet 135' circulates in the external air guide duct 134' and is guided by the external air guide duct 134' to the neck of the human body, thereby cooling the neck of the human body.

[0168] The fan blade assembly 21' also includes a pressure chamber 212', within which the turbine fan blades 211' are disposed. The pressure chamber 212' has an inlet 212a' corresponding to the air inlet 133' and an outlet 212b' corresponding to the air outlet 135'. By designing the pressure chamber 212', it concentrates the radially flowing air from the turbine fan blades 211', guiding the airflow to the outlet 212b' of the pressure chamber 212', and then out through the air outlet 135' to the external air duct 134'. See Figure 35, where arrows indicate the direction of the airflow path.

[0169] Based on the neck fan 1' in this application embodiment, an external air guide 134' is designed on the second part 1312' of the inner surface 131' of the outer shell 13' of the first fan body 11' and the second fan body 12'. The external air guide 134' is designed outside the outer shell 13', and the interior of the outer shell 13' only needs to accommodate core components such as turbine blades 211', motor, and battery. There is no need to reserve a complex air duct cavity. This greatly frees up the internal space of the outer shell 13', and the outer shell 13' can be made thinner and lighter, which is conducive to realizing the thinner and lighter design of the neck fan 1'.

[0170] As shown in Figures 32-35, the external air guide duct 134' extends from one end of the second part 1312' near the first part 1311' to the connection point of the first fan body 11' and the second fan body 12'. By designing the external air guide duct 134' as a long strip extending from the first part 1311' to the connection point of the first fan body 11' and the second fan body 12', the airflow path of the external air guide duct 134' is shorter and more linear, which is beneficial for achieving a thinner and lighter design of the neck fan 1'. In addition, the long strip external air guide duct 134' plays a good guiding role for the air flowing out from the air outlet 135', so that as much air flowing out from the air outlet 135' as possible is guided to the neck of the human body, thereby playing a good cooling role for the neck of the human body.

[0171] As shown in Figures 32-35, the second part 1312' includes an end face 1312a' and a guide surface 1312b'; the end face 1312a' is connected to the first part 1311', and the air outlet 135' is located on the end face 1312a'; the guide surface 1312b' is connected to the end face 1312a', and the cross-section of the guide surface 1312b' is a concave U-shape, the width of the U-shape gradually decreasing along the direction from the end face 1312a' to the connection between the first fan body 11' and the second fan body 12'. The guide surface 1312b' includes a first sub-surface, a second sub-surface, and a third sub-surface. The first sub-surface is located between the second and third sub-surfaces, and is connected to both the second and third sub-surfaces. The second and third sub-surfaces are located on the same side of the first sub-surface and are arranged opposite to each other. The first, second, and third sub-surfaces together form the aforementioned U-shape. From the side closest to the air outlet 135' to the side furthest from the air outlet 135', the width of the external air guide duct 134' gradually decreases. This design allows the external air guide duct 134' to also have a converging effect on the air flowing out of the air outlet 135', reducing air volume loss.

[0172] The outer surface 132' includes a main surface 1321' and a side surface 1322', the side surface 1322' being connected to the periphery of the main surface 1321' and located between the main surface 1321' and the inner surface 131'; the axial direction of the turbine blade 211' is from the first part 1311' to the main surface 1321'; at least one of the first part 1311' and the main surface 1321' has the aforementioned air inlet 133', and the distance from the first part 1311' to the main surface 1321' is less than the width of the first part 1311'. The sidewalls of the main body surface 1321' and the corresponding part of the first part 1311', the sidewall of the side 1322', and the sidewall of the first part 1311' together form a cavity for placing the turbine blade 211'. In combination with the axial air intake and radial air exhaust characteristics of the turbine blade 211', by designing the distance from the first part 1311' to the main body surface 1321' to be smaller than the width of the first part 1311', the thickness of the outer shell 13' at the location of the turbine blade 211' can be effectively reduced, achieving a thin and light design.

[0173] As shown in Figures 32-35, the air inlet 133' includes a first air inlet 1331' and a second air inlet 1332'. The first part 1311' has the first air inlet 1331', and the part of the main body surface 1321' corresponding to the first part 1311' has the second air inlet 1332'. At this time, the turbine fan blade 211' is a double-suction turbine fan blade 211'. The fan blade assembly 21' also includes a motor, which is located in the middle of the turbine fan blade 211'. The output shaft of the motor is connected to the fan shaft of the turbine fan blade 211'. The motor drives the turbine fan blade 211' to rotate. The two sides of the turbine fan blade 211' arranged opposite each other along its axial direction serve as air intake sides, drawing in air from the first air inlet 1331' and the second air inlet 1332' respectively. After the air merges on the outer periphery of the turbine fan blade 211', it is thrown out radially along the turbine fan blade 211' and finally pushed out from the air outlet 135', thus forming a continuous wind. By designing a first air inlet 1331' in the first part 1311' and a second air inlet 1332' in the part of the main body surface 1321' corresponding to the first part 1311', the turbine blades 211' form a double-sided air intake, which can effectively increase the air intake area. Under the same air volume, the radial dimension of the turbine blades 211' with double-sided air intake is smaller than that of the turbine blades 211' with single-sided air intake. This can further reduce the width of the outer casing 13' at the location of the turbine blades 211', achieving a miniaturized design. In addition, the double-sided air intake of the turbine blades 211' can cancel out the axial thrust of the turbine blades 211', reducing the vibration and noise when the turbine blades 211' rotate, and improving the service life of the turbine blades 211' and the motor. The double-sided air intake of the turbine blades 211' makes the internal flow field of the turbine blades 211' symmetrical, reducing eddy current and backflow losses, and improving motor efficiency.

[0174] Of course, in other embodiments, if the air inlet 133' is only provided in the first part 1311' or the air inlet 133' is only provided in the part of the main body surface 1321' corresponding to the first part 1311', then the turbine fan blade 211' is a single-suction turbine fan blade 211'. The fan blade assembly 21' also includes a motor, which is located on the side of the turbine fan blade 211' away from the air inlet 133'. The output shaft of the motor is connected to the fan shaft of the turbine fan blade 211'. The motor drives the turbine fan blade 211' to rotate. The side of the turbine fan blade 211' facing the air inlet 133' serves as the air intake side, drawing in air from the air inlet 133'. The air is thrown out radially along the turbine fan blade 211' and finally pushed out from the air outlet 135', thereby forming a continuous wind.

[0175] As shown in Figures 36-37, the first air inlet 1331' includes multiple U-shaped air inlet structures 1331a' or annular air inlet structures 1331a' arranged sequentially from the center to the edge of the first part 1311', and each air inlet structure 1331a' includes multiple first air inlet holes 1331d' arranged along the extension direction of the air inlet structure 1331a'; the second air inlet 1332' includes multiple second air inlet holes 1332a'. Specifically, for each U-shaped air intake structure 1331a', each U-shaped air intake structure 1331a' includes a U-shaped grille 1331b' and multiple connecting parts 1331c'. The multiple connecting parts 1331c' are spaced apart and connected to the outer edge of the U-shaped grille 1331b'. The outermost U-shaped air intake structure 1331a' is connected to the outer casing 13' through the connecting parts 1331c'. Adjacent U-shaped air intake structures 1331a' are connected through the connecting parts 1331c', and the interval between two adjacent connecting parts 1331c' is used to form a first air intake hole 1331d'. For each annular air intake structure, each annular air intake structure includes an annular grille and multiple connecting parts. The multiple connecting parts are spaced apart and connected to the outer edge of the annular grille. The outermost annular air intake structure is connected to the outer casing 13' through the connecting parts. Adjacent annular air intake structures are connected through the connecting parts, and the interval between two adjacent connecting parts is used to form a first air intake hole 1331d'. By designing the first air inlet 1331d' and the second air inlet 1332a', the turbine blades 211' are arranged on opposite sides along their axial direction as air inlet sides, drawing in air through the first air inlet 1331d' and the second air inlet 1332a' respectively. The air is then combined around the outer periphery of the turbine blades 211' and thrown out radially along the turbine blades 211', finally being expelled from the air outlet 135', thus forming a continuous airflow. By designing the first air inlet 1331d' and the second air inlet 1332a', not only can air flow smoothly into the housing 13' from the first air inlet 1331d' and the second air inlet 1332a' under the rotation of the turbine blades 211', but it can also effectively reduce or even avoid the possibility of users' hair getting tangled on the turbine blades 211'.

[0176] As shown in Figures 32-35, the outer casing 13' includes an inner side plate 13a' and an outer casing body 13b' connected to the edge of the inner side plate 13a'. The inner side plate 13a' has the aforementioned inner side surface 1322', and the inner side plate 13a' has a first portion 1311' and a second portion 1312'. The outer casing body 13b' has the aforementioned main body surface 1321', and the distance between the second portion 1312' and the main body surface 1321' is less than the distance between the first portion 1311' and the main body surface 1321'. This design allows an external air guide duct 134' recessed towards the main body surface 1321' to be effectively formed on the second portion 1312' of the inner side surface 1322' of the outer casing 13'.

[0177] The inner side plate 13a' and the outer shell body 13b' are integrally formed and then detachably connected as one piece. The inner side plate 13a' can be integrally formed, but is not limited to, by injection molding or 3D printing, and the outer shell body 13b' can also be integrally formed, but is not limited to, by injection molding or 3D printing. The specific detachable connection method between the inner side plate 13a' and the outer shell body 13b' is not limited here; designers can design it reasonably according to actual needs. For example, the inner side plate 13a' can be fixedly connected to the outer shell body 13b' by at least one of the following methods: screw connection, snap-fit ​​connection, or plug-in connection. Designing the inner side plate 13a' and the outer shell body 13b' to be integrally formed reduces the processing difficulty of the inner side plate 13a' and the outer shell body 13b'; designing the inner side plate 13a' and the outer shell body 13b' to be detachably connected facilitates the replacement of damaged components such as the turbine fan blade 211' later.

[0178] As shown in Figure 34, the neck fan 1' also includes an electronic control component 31', which is located between the second part 1312' and the main body surface 1321' and electrically connected to the fan blade assembly 21'. The specific installation method between the electronic control component 31' and the outer casing 13' is not limited here; designers can design it reasonably according to actual needs. For example, the electronic control component 31' can be detachably fixed to the outer casing 13' by at least one of the following methods: screwing, snap-fitting, or plugging. Alternatively, the electronic control component 31' can be non-detachably fixed to the outer casing 13' by riveting or gluing. The electronic control component 31' includes a circuit board and a controller mounted on the circuit board. The motor of the fan blade assembly 21' is electrically connected to the controller through the circuit board.

[0179] Of course, the neck fan 1' also includes a trigger 50' located on the housing 13', which is electrically connected to the circuit board. As shown in Figure 1, the trigger 50' includes a button 51', which the user can press to turn the motor on or off, and also to adjust the motor speed, thereby achieving multi-level airflow adjustment of the neck fan 1'.

[0180] As shown in Figure 38, the trigger 50' includes a first knob 52'. The user can turn the first knob 52' on or off the motor. The user can also adjust the speed of the motor by turning the first knob 52', so as to realize the multi-level adjustment of the air volume of the neck fan 1'.

[0181] As shown in Figure 39, the trigger 50' includes a second knob 53'. The user can turn the second knob 53' on or off the motor. The user can also adjust the motor speed by turning the second knob 53' to achieve multi-level adjustment of the airflow of the neck fan 1'.

[0182] Further, as shown in Figures 34-35, the first mounting cavity and the first recessed surface are respectively located on both sides of the first main body along the first direction. The output shaft of the first motor is arranged along the first direction. The turbine fan blades are used to guide the air from at least one side of the first main body along the first direction to the first recessed surface. Furthermore, the external air duct formed by the first recessed surface guides the air to one side of the first main body and the end away from the turbine fan blades. It can be understood that, compared to an internal air duct, an external air duct is beneficial for reducing wind resistance and wind power loss, resulting in a better blowing effect.

[0183] The above are one or more embodiments provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to or identical to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A portable fan, characterized in that, The portable fan includes: The first main body part is an arc-shaped structure, including a first air guide passage located on the outer side and a first mounting cavity located inside the first main body part. The first air guide passage includes a first recessed surface located on the outer side of the first mounting cavity. A first power supply component is located within the first mounting cavity; and A first fan assembly is disposed at one end of the first main body and is used to blow air toward the first air guide path. The first recessed surface is used to guide the air from the first fan assembly to one side of the first main body. The first fan assembly includes a first motor and a first fan blade mounted on the output shaft of the first motor. The first motor is electrically connected to the first power supply assembly.

2. The portable fan as described in claim 1, characterized in that, The first fan blade includes a turbine fan blade, the first mounting cavity and the first recessed surface are respectively located on both sides of the first main body portion along the first direction, the output shaft of the first motor is arranged along the first direction, and the turbine fan blade is used to guide the wind of the first main body portion along at least one side of the first direction to the first recessed surface.

3. The portable fan as described in claim 1, characterized in that, The end of the portable fan away from the first fan assembly is also used to connect to another portable fan via a connector, so that the portable fan, the connector, and the other portable fan can be assembled into a neck-hanging fan for use on the user's neck, wherein the portable fan and the other portable fan are respectively positioned on both sides of the user's neck; the connector includes a flexible connecting portion, the flexible connecting portion having at least one mounting hole, the at least one mounting hole being used to fit and fix the first connecting end of the portable fan and the second connecting end of the other portable fan; the at least one mounting hole is a mounting through hole provided along the extending direction, the two ends of the mounting hole being used to fit and fix the first connecting end and the second connecting end respectively; the portable fan and the other portable fan each have a corresponding and independent button switch, so that the opening and closing of the portable fan and the other portable fan are independently controlled by the corresponding button switch.

4. The portable fan as described in claim 1, characterized in that, The first fan assembly further includes a first fan housing. The first motor and the first fan blades are both disposed within the first fan housing. The first fan housing includes a housing body and an air outlet shroud. The air outlet shroud is disposed on one side of the housing body and includes multiple air outlet plates and an annular wall structure surrounding the multiple air outlet plates. Multiple air outlet holes are defined between the multiple air outlet plates. The housing body includes a circumferential sidewall structure, a mounting portion located at one end of the sidewall structure, and an air guide portion connected between the mounting portion and the sidewall structure. The air guide portion includes a plurality of spaced air guide blades for directing air from the first fan blade toward the air outlet shroud. The first fan blade and the first motor are disposed within the sidewall structure and located on the side of the mounting portion away from the air outlet shroud. The first motor is mounted on the mounting portion and electrically connected to the first power supply component.

5. The portable fan as described in claim 4, characterized in that, The inner surface of the ring wall structure is an inclined surface or an arc surface, so that the inner diameter of the ring wall structure gradually decreases along the direction from the shell body to the air outlet hood.

6. The portable fan as described in claim 4, characterized in that, The mounting portion also has a blind hole facing the first motor, the opening of the blind hole facing the side where the first motor is located, and the blind hole is used to store the oil required for the rotation of the output shaft of the first motor.

7. The portable fan as described in claim 4, characterized in that, The mounting part includes a mounting plate and a mounting post that connects to the mounting plate and extends toward the first motor. The blind hole is provided on the mounting post. The first motor has a motor mounting hole, which is fitted onto the mounting post so that the first motor is mounted on the mounting post.

8. The portable fan according to claim 7, characterized in that, The blind hole is further provided with a fixing post and a limiting ring with a through hole. The output shaft of the first motor passes through the fixing post and the limiting ring, and the limiting part of the output shaft is located at the end of the limiting ring away from the fixing post. The output shaft includes a main body connected to the fan blade and the limiting part connected to the main body. The limiting part includes a rod and a limiting end connected to the end of the rod away from the fan blade. The diameter of the limiting end gradually decreases in the direction away from the fan blade. The outer surface of the rod, the limiting end, and the main body form a limiting groove. The limiting ring has a limiting hole. The diameter of the limiting hole is larger than the diameter of the rod and smaller than the diameter of the main body and smaller than the diameter of the limiting end, so that the limiting ring is limited in the limiting groove. The limiting ring is an elastic spring that can extend and retract along the extension direction of the output shaft.

9. The portable fan as described in claim 4, characterized in that, The air outlet cover also includes an installation structure connecting multiple air outlet panels. The installation structure includes an annular installation wall and a cover plate connecting the installation wall. The installation structure also includes an installation column connected to the inner side of the cover plate. The installation column is detachably connected to the housing body. The installation structure is also provided with a first alignment structure. The housing body has a second alignment structure. The first alignment structure and the second alignment structure cooperate to realize the alignment assembly of the housing body and the air outlet cover.

10. The portable fan as claimed in claim 4, characterized in that, The housing body has an opening, through which the wire connecting the first motor extends and enters the first body part to electrically connect to the first power supply component.

11. The portable fan as claimed in claim 4, characterized in that, The first fan housing also includes a metal mesh, which is disposed on the side of the side wall structure away from the air outlet shroud. The metal mesh has multiple air inlets, each with an inner diameter between 0.5 mm and 4 mm. The air inlets are regular hexagons, and two adjacent air inlets share the same enclosure wall, the width of which is between 0.05 mm and 2 mm.

12. The portable fan as claimed in claim 11, characterized in that, The first fan housing also includes an air inlet cover, the metal mesh is installed inside the air inlet cover, the air inlet cover is located at the end of the housing body away from the air outlet cover, the air inlet cover is annular, and the air inlet cover is sleeved on one end of the housing body; the outer side of one end of the housing body may have a stepped groove, the air inlet cover is sleeved on the stepped groove, and the outer side of the air inlet cover is flush with the outer side of the housing body; the first fan assembly is a direct-blowing fan assembly with air inlet and outlet on the same axis, wherein the metal mesh, the first fan blade, the first motor, the housing body, and the air outlet cover are all arranged in a straight line.

13. The portable fan as claimed in claim 1, characterized in that, The portable fan also includes a first outer cover, the first mounting cavity having an opening, the first outer cover being snapped shut with the opening of the first mounting cavity; the inner side of the first outer cover has at least one first snap fastener, and the outer side of the first main body has at least one second snap fastener, the at least one first snap fastener and the at least one second snap fastener engaging to achieve the assembly of the first outer cover and the first main body.

14. The portable fan as claimed in claim 1, characterized in that, The first fan assembly is disposed inside the first main body portion, and the inside of the first main body portion is provided with a plurality of first connecting fasteners, and the first fan assembly is provided with a plurality of second fasteners that engage with the first fasteners.

15. A fan assembly, characterized in that, The fan assembly includes a first fan housing, a first motor, and a first fan blade connected to the first motor. The first fan blade is disposed in the first fan housing. The first fan housing includes a housing body and an air outlet shroud. The air outlet shroud is disposed on one side of the housing body and has an air outlet hole. The air outlet shroud includes multiple air outlet plates and an annular wall structure connected to the periphery of the multiple air outlet plates. Multiple air outlet holes are defined between the multiple air outlet plates. The housing body includes an annular side wall structure, a mounting portion located at one end of the side wall structure, and a guide portion connected between the mounting portion and the side wall structure. The guide portion includes multiple spaced guide vanes for directing air from the first fan blade toward the air outlet shroud. The first fan blade and the first motor are disposed within the side wall structure and located on the side of the mounting portion away from the air outlet shroud. The first motor is mounted on the mounting portion and is used for electrical connection with an external first power supply component.

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