Portable fan

Abstract

The application provides a portable fan, comprising: a shell provided with an air inlet, a containing cavity and an air outlet in communication, the shell further comprising a base; a fan assembly, the fan assembly comprising a hub, a plurality of fan blades arranged at intervals on the outer surface of the hub, a motor comprising a stator and a rotor, the stator comprising a coil, the motor being connected with the base; a driving circuit board, the driving circuit board being electrically connected with the lead wire of the coil; a hand-held part, the hand-held part being connected with the shell, the hand-held part being distributed with a first end part along the direction from the air inlet to the air outlet, and a second end part opposite to the first end part, the distribution length of the fan assembly and the motor in the axial direction of the shell being limited within the space defined by the extension lines of the first end part and the second end part towards the shell. The stability of the fan is improved.

Description

Technical Field

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

[0002] Fans are a common household appliance used in daily life, creating airflow to cool people down. Portable fans are currently popular due to their light weight and portability; however, they often suffer from poor stability. Summary of the Invention

[0003] This application provides a portable fan, including:

[0004] The housing has a communicating air inlet, a receiving cavity and an air outlet, and the housing also includes a base;

[0005] A fan assembly is housed within the housing. The fan assembly includes a hub and a plurality of fan blades spaced apart on the outer surface of the hub. A rotating shaft is fixed at the center of the inner side of the hub.

[0006] An electric motor, including a stator and a rotor, the stator including coils, the electric motor being connected to the base;

[0007] A drive circuit board electrically connected to the leads of the coil to drive the fan assembly to rotate, blowing air from the air inlet through the receiving cavity and then out from the air outlet;

[0008] The handheld part is connected to the housing. The handheld part has a first end and a second end opposite to the first end in the direction from the air inlet to the air outlet. The distribution length of the fan assembly and the motor in the axial direction of the housing is limited within the space defined by the extension lines of the first end and the second end toward the housing. Attached Figure Description

[0009] Figure 1-1 This is a perspective view of the portable fan described in this application.

[0010] Figure 1-2 yes Figure 1-1 The diagram shows an exploded view of the fan.

[0011] Figure 1-3 yes Figure 1-2 The diagram shows an exploded view of the fan with the sleeve removed.

[0012] Figure 1-4 This is a schematic diagram of the structure of the fan base of the portable fan of this application.

[0013] Figure 1-5This is a schematic diagram of the pressure mount of the portable fan in this application.

[0014] Figure 1-6 This is a schematic diagram of the sleeve of the portable fan of this application.

[0015] Figure 2-1 This is a perspective view of the first embodiment of the portable fan of this application.

[0016] Figure 2-2 This is a cross-sectional view of the first embodiment of the portable fan of this application.

[0017] Figure 2-3 yes Figure 2-2 Enlarged view of section A.

[0018] Figure 2-4 This is a cross-sectional view from another direction of the first embodiment of the portable fan of this application.

[0019] Figure 2-5 This is a cross-sectional view of the second embodiment of the portable fan of this application.

[0020] Figure 2-6 This is a cross-sectional view of the third embodiment of the portable fan of this application.

[0021] Figure 3-1 This is a schematic diagram of the air supply section described in Embodiment 3-1 of this application.

[0022] Figure 3-2 for Figure 3-1 The diagram shows an explosion of the air supply section.

[0023] Figure 3-3 This is a cross-sectional schematic diagram of the air supply section described in Embodiment 3-1 of this application.

[0024] Figure 3-4 This is a schematic diagram of the display screen.

[0025] Figure 3-5 This is a schematic diagram of the assembly of the inner shell.

[0026] Figure 3-6 This is a schematic diagram of the portable fan described in Embodiments 3-2 of this application.

[0027] Figure 3-7 This is a cross-sectional view of the portable fan described in Embodiments 3-2 of this application.

[0028] Figure 4-1 This is a three-dimensional structural diagram of a handheld fan according to an embodiment of this application.

[0029] Figure 4-2 This is a three-dimensional structural diagram of the handheld fan from another angle, according to an embodiment of this application.

[0030] Figure 4-3 This is a three-dimensional structural diagram of a partial structure of an embodiment of this application.

[0031] Figure 4-4 This is an exploded view of an embodiment of this application.

[0032] Figure 4-5 This is a schematic diagram of the airflow regulation circuit according to an embodiment of this application.

[0033] Figure 4-6 This is a schematic diagram of the airflow regulation circuit according to an embodiment of this application.

[0034] Figure 5-1 This is a schematic diagram of a handheld structure for a handheld fan, provided as an embodiment of this application.

[0035] Figure 5-2 This is a schematic diagram of the mounting bracket and circuit board assembly in a handheld structure for a handheld fan, provided as an embodiment of this application.

[0036] Figure 5-3 This is a schematic diagram of the gear knob assembly and battery in a handheld structure for a handheld fan, provided in an embodiment of this application.

[0037] Figure 5-4 This is a schematic diagram of a protective switch button assembly in a handheld structure for a handheld fan, provided as an embodiment of this application.

[0038] Figure 5-5 This is a schematic diagram of the handheld part and the air delivery structure in a handheld structure for a handheld fan provided in an embodiment of this application.

[0039] Figure 5-6 This is a schematic diagram of the clamping plate in a handheld structure for a handheld fan, provided as an embodiment of this application.

[0040] Figure 5-7 This is a schematic diagram of the structure of the first support plate and the second support plate in a handheld structure for a handheld fan provided in an embodiment of this application.

[0041] Figure 5-8 This is a schematic diagram of the space accommodating the handheld structure of a handheld fan, provided as an embodiment of this application.

[0042] Figure 5-9 This is a schematic diagram of the isolation plate in a handheld structure for a handheld fan, provided as an embodiment of this application.

[0043] Figure 5-10 This is a schematic diagram of the first and second protrusions in a handheld structure for a handheld fan, provided in an embodiment of this application.

[0044] Figure 6-1This is a schematic diagram of the structure of a handheld fan provided in an embodiment of this application.

[0045] Figure 6-2 This is a schematic diagram of the mounting bracket in a handheld fan, provided as an embodiment of this application.

[0046] Figure 6-3 This is a schematic diagram of the handheld housing of a handheld fan provided in an embodiment of this application.

[0047] Figure 6-4 This is a schematic diagram of the control mechanism in a handheld fan, provided as an embodiment of this application.

[0048] Figure 6-5 This is a schematic diagram of the mounting slot in a handheld fan provided in an embodiment of this application.

[0049] Figure 6-6 This is a schematic diagram of the outer casing of a handheld fan provided in an embodiment of this application.

[0050] Figure 6-7 This is a schematic diagram of the structure of the first circuit board in a handheld fan provided in an embodiment of this application.

[0051] Figure 6-8 This is a schematic diagram of the structure of the inner shell of a handheld fan provided in an embodiment of this application.

[0052] Figure 7-1 This is a schematic diagram of the air delivery device of a handheld fan provided in an embodiment of this application.

[0053] Figure 7-2 This is a schematic diagram of the mounting bracket in the air delivery device of a handheld fan provided in an embodiment of this application.

[0054] Figure 7-3 This is a schematic diagram of the handheld part of a handheld fan air delivery device provided in an embodiment of this application.

[0055] Figure 7-4 This is a schematic diagram of the wiring opening in the air delivery device of a handheld fan provided in an embodiment of this application.

[0056] Figure 7-5 A schematic diagram of the wire groove structure in the air delivery device of a handheld fan provided in this application embodiment.

[0057] Figure 7-6 The second schematic diagram shows the structure of the wire groove in the air delivery device of a handheld fan provided in this application embodiment.

[0058] Figure 7-7 This is a schematic diagram of the gear knob assembly and the safety switch button assembly in the air delivery device of a handheld fan provided in an embodiment of this application.

[0059] Figure 7-8 This is a schematic diagram of the inner shell and outer shell of a handheld fan air delivery device provided in an embodiment of this application.

[0060] Figure 7-9 This is a schematic diagram of the air inlet and air outlet of a handheld fan air delivery device provided in an embodiment of this application.

[0061] Figure 7-10 for Figure 7-9 A magnified schematic diagram of the structure at point A in the middle.

[0062] Figure 7-11 This is a schematic diagram of the fan assembly in a handheld fan air delivery device provided in an embodiment of this application. Detailed Implementation

[0063] Example 1, see Figures 1-1 to 1-6 As shown.

[0064] refer to Figure 1-1 In this embodiment, the portable fan 100 is a handheld fan equipped with a handheld part 11 (not shown, the same below), which allows the user to carry the portable fan 100 with them. Of course, the portable fan 100 can also be a clamp-on fan equipped with a clip, a versatile fan equipped with a bending shaping component for winding, a desktop fan equipped with a stand, or a floor fan equipped with a telescopic stand; it is not limited to these. A semiconductor cooling element (not shown, the same below) can be provided on the handheld part 11, allowing the user to carry the portable fan 100 with them. Simultaneously, the semiconductor cooling element can automatically adjust the cooling temperature according to the temperature of the part in contact with the user, improving the user's carrying comfort. It should be understood that the portable fan 100 is used for heat dissipation and cooling, and is equipped with a semiconductor cooling element to improve the user's carrying comfort; of course, adding a heating element (not shown) to the portable fan 100 can also be used for heat preservation and warmth, and a warming element (not shown) can be provided to automatically adjust the temperature of the part in contact with the human body to warm the part in contact with the human body, improving the user's carrying comfort.

[0065] refer to Figure 1-1 In this embodiment, the handheld part 11 can accommodate a battery (not labeled, the same below), and a switch button (not labeled, the same below) and a charging port (not shown, the same below) can be exposed on the handheld part 11. The battery powers the portable fan 100, the switch button is used to adjust the wind speed and turn the fan on and off, and the charging port is used to charge the battery with an external power source. When the portable fan 100 is a fan of other forms (such as the clamp fan, versatile fan, desktop fan, etc. mentioned above), the positions of the battery, switch button and charging port can be adjusted accordingly.

[0066] refer to Figures 1-1 to 1-6 The portable fan 100 includes an air supply section 10 and a handheld section 11. The air supply section 10 and the handheld section 11 are connected by a fixing member 12. The handheld section 11 is provided with a first connecting member 13, and the air supply section 10 is provided with a second connecting member 14. The fixing member 12 passes through the first connecting member 13 and the second connecting member 14 to connect the air supply section 10 and the handheld section 11. The end of the handheld section 11 is provided with a protrusion 16, which extends along the length of the handheld section 11 and is inserted into the air supply section 10. The first connecting member 13 is provided on the protrusion 16. The air supply section 10 has a limiting plate 17, and the limiting plate 17 has a second connecting member 14. The fixing member 12 passes through the first connecting member 13 and the second connecting member 14 to connect the handheld section 11 and the air supply section 10. If the handheld unit 11 malfunctions or the battery inside the handheld unit 11 is dead, the handheld unit 11 can be replaced separately. The replaced handheld unit 11 can be repaired or charged and replaced with a working handheld unit 11 or another handheld unit 11 with power to increase the product's battery life.

[0067] refer to Figures 1-1 to 1-3 The handheld part 11 is partially embedded in the air supply part 10, or a portion of the air supply part 10 is embedded in the handheld part 11. This embedded or inserted structural design can improve the connection stability between the handheld part 11 and the air supply part 10 and prevent movement.

[0068] refer to Figures 1-4 to 1-5 The air supply unit 10 includes a fan base 18 and a mixed-flow fan 19 disposed on the fan base 18, and a pressurizing seat 25 covering the mixed-flow fan 19. The mixed-flow fan 19 is located in front of the fan base 18 and generates airflow by rotating around a pivot. The pressurizing seat 25 is located in front of the mixed-flow fan 19 and includes a pressurizing surface that at least partially increases radially from one end away from the fan base 18 to one end closer to the fan base 18.

[0069] refer to Figure 1-4The fan base 18 includes an inner ring 20 and an outer ring 21, and a plurality of connecting strips 22 connecting the inner ring 20 and the outer ring 21. The inner ring 20 and the outer ring 21 are connected by the connecting strips 22. A limiting plate 17 is connected between two connecting strips 22. A second connecting member 14 is provided on the limiting plate 17. During assembly, a protrusion 16 is inserted between two connecting strips 22 to limit the relative circumferential displacement of the fan base 18. The first connecting member 13 on the protrusion 16 is aligned with the second connecting member 14 on the limiting plate 17. The protrusion 16 is connected to the limiting plate 17 by a fixing member 12 to limit the movement of the fan base 18 in the axial direction and play a fixing role. It can be understood that the fixing member 12 can be a screw, a pin, or glue, as long as it can fix the protrusion 16 to the limiting plate 17.

[0070] In another embodiment, one of the first connector 13 and the second connector 14 is a connecting slot 23 and the other is a connecting buckle 24. The connecting slot 23 and the connecting buckle 24 are conventional designs. The handheld part 11 and the air supply part 10 are connected through the connecting slot 23 and the connecting buckle 24. This method of connection and assembly is efficient.

[0071] refer to Figures 1-4 to 1-5 The outer wall surface of the outer ring 21 of the fan base 18 near the pressure seat 25 is provided with a slot 23, and the pressure seat 25 near the fan base 18 is provided with a buckle 24. The pressure seat 25 is connected to the fan base 18, which is convenient and efficient to assemble.

[0072] refer to Figures 1-1 to 1-6 The handheld part 11 is equipped with a battery and a circuit board. The battery is electrically connected to the circuit board through wires and is used to control the operation of the mixed flow fan 19.

[0073] refer to Figure 1-3 and Figure 1-6 The air supply unit 10 also includes a sleeve 26, in which the pressure seat 25, the fan base 18 and the mixed flow fan 19 are installed to restrict the radial movement of the pressure seat 25, the fan base 18 and the mixed flow fan 19 along the sleeve 26, and they can only move axially from the openings at both ends of the sleeve 26 to prevent displacement and protect the internal structure.

[0074] refer to Figure 1-6 The sleeve 26 has an assembly opening 27 on its side wall for the protrusion 16 to pass through. The assembly opening 27 is provided so that the protrusion 16 can pass through.

[0075] refer to Figure 1-5The outer wall of the pressure seat 25 is provided with support columns 28. Two support columns 28 extend along the radial direction of the pressure seat 25 and are connected by an arc plate 29. The arc plate 29 connects the ends of the two support columns 28. The support columns 28 and the arc plate 29 support the inner wall of the sleeve 26 to prevent the sleeve 26 from collapsing due to external pressure. At the same time, it prevents the pressure seat 25 from being deformed by pulling the handle 11 downward, which would cause the inner wall of the pressure seat 25 to hit the fan blade and cause a malfunction.

[0076] The portable fan also includes a three-phase high-speed motor to improve battery life in high-speed, high-energy-consumption usage scenarios by replacing the handheld unit and / or the battery built into the handheld unit.

[0077] Example 2, see Figures 2-1 to 2-6 As shown.

[0078] like Figure 2-1 and Figure 2-2 The diagram shown is a schematic representation of a first embodiment of the portable fan of this application. The portable fan includes a housing 1, a fan assembly 2, a motor 3, and a drive circuit board 4. The housing 1 has a communicating air inlet 161, a receiving cavity 162, and an air outlet 163. The fan assembly 2, the motor 3, and the drive circuit board 4 are housed within the housing 1. The drive circuit board 4 is electrically connected to the motor 3 to drive the fan assembly 2 to rotate, blowing air from the air inlet 161 through the receiving cavity 162 and then out through the air outlet 163.

[0079] like Figure 2-1 and Figure 2-2 As shown, the housing 1 includes a front housing 11 and a rear housing 12. The front housing 11 includes a first fan housing 111 and a first handheld housing 112. The rear housing 12 includes a second fan housing 121 and a second handheld housing 122. The first fan housing 111 and the second fan housing 121 form an air outlet 16, and the first handheld housing 112 and the second handheld housing 122 form a handheld portion 17. It should be understood that the first fan housing 111 and the second fan housing 121 can be front-to-back or left-to-right; the first handheld housing 112 and the second handheld housing 122 can also be front-to-back or left-to-right. The handheld portion 17 is provided with a switch 5, an interface 6, and a battery 7. In this embodiment, the switch 5 is a stepless speed control switch 5. Of course, in other embodiments, the first handheld housing 112 and the second handheld housing 122 may not be provided, or they may be provided as other common forms such as desktop fans, neck fans, clip fans, and stand fans.

[0080] like Figures 2-2 to 2-4As shown, the first wind casing 111 includes a first outer shell and a first inner shell that fit together internally and externally. The first inner shell and the first outer shell are fitted together, and both the first inner shell and the first outer shell extend horizontally forward. The second wind casing 121 includes a second outer shell and a second inner shell that fit together internally and externally. The rear ends of the second inner shell and the second outer shell are spaced apart and connected by a connector. The second outer shell extends horizontally forward, and the second inner shell first extends horizontally forward from back to front, and then expands radially outward. The front end of the second inner shell is connected to the front end of the second outer shell, and the front end of the second inner shell abuts against the rear end of the first inner shell. In this embodiment, the first outer shell and the second outer shell are integrally formed. Of course, in other embodiments, the first outer shell and the second outer shell can also be separately formed. Both the first wind casing 111 and the second wind casing 121 are double-layer casing 1 structures, which makes the structure more stable. The shape change of the second inner shell is beneficial for pressurizing the wind, making the wind stronger and the air outlet distance farther. Of course, in other embodiments, the first wind casing 111 and / or the second wind casing 121 can also be single-layer casing 1 structures.

[0081] like Figure 2-1 and Figure 2-2 As shown, the housing 1 further includes a pressurizing member 13 disposed within the first air casing 111. Multiple connecting blades 14 connect the pressurizing member 13 and the front casing 11. A base 131 and a sleeve 132 are formed within the pressurizing member 13. The base 131 is located between the front and rear ends of the pressurizing member 13 and forms a rearward clearance space 1321 within the pressurizing member 13. The base 131 also forms a forward receiving portion 1322 within the pressurizing member 13. The sleeve 132 protrudes from the base 131 towards the receiving cavity 162, i.e., the sleeve 132 protrudes rearward from the base 131, and the sleeve 132 is hollow.

[0082] like Figure 2-1 and Figure 2-2 As shown, the air inlet 161 is located in the radially inner region of the second inner shell, and the air outlet 163 is located in the region between the pressurizing member 13 and the first inner shell in the radial direction. The fan assembly 2 includes a hub 21 and a plurality of fan blades 22 spaced apart on the outer surface of the hub 21. The hub 21 includes a guide surface 212 that increases radially from back to front, and the pressurizing member 13 includes a pressurizing surface 133 that increases radially from back to front. The guide surface 212 and the pressurizing surface 133 are arranged adjacent to each other and spaced apart to allow the air to blow smoothly forward. A radially outward air duct is formed from the air inlet 161 to the air outlet 163, which pressurizes the air within the housing 1 and forms a large air outlet surface.

[0083] like Figures 2-1 to 2-4As shown, the fan assembly 2 includes a hub 21 and a plurality of fan blades 22 spaced apart on the outer surface of the hub 21. A rotating shaft 23 is fixed at the center of the inner side of the hub 21. The motor 3 includes a stator 31 and a rotor 32, both of which are housed within the hub 21. Further, the hub 21 includes an annular extension wall 211, within which the stator 31 and rotor 32 are housed. The stator 31 is sleeved on the sleeve 132 and includes a coil 311. The rotor 32 is radially positioned between the stator 31 and the hub 21. The rotating shaft 23 is inserted into the sleeve 132, and the extension wall 211, stator 31, and rotor 32 extend forward into the clearance space 1321.

[0084] like Figure 2-1 and Figure 2-2 As shown, the extension wall 211 extends forward beyond the air guide surface 212. The air guide surface 212 and the pressurizing surface 133 are arranged adjacent to each other with a gap. Therefore, the gap between the air guide surface 212 and the pressurizing surface 133 is misaligned with the front end of the extension wall 211, making it difficult for dust to enter and settle inside the extension wall 211. Neither the stator 31 nor the rotor 32 extends forward beyond the extension wall 211, and the extension wall 211, the stator 31, and the rotor 32 extend forward into the clearance space 1321, so that a portion of the extension wall 211, the stator 31, and the rotor 32 is contained within the clearance space 1321.

[0085] like Figure 2-1 and Figure 2-2 As shown, the drive circuit board 4 is not located between the base 131 and the stator 31. The battery 7 is electrically connected to the drive circuit board 4, and the drive circuit board 4 is electrically connected to the lead wire of the coil 311 to drive the fan assembly 2 to rotate, blowing air from the air inlet 161 through the receiving cavity 162 and then out of the air outlet 163. In this embodiment, the drive circuit board 4 is housed in the receiving portion 1322 formed forward of the base 131. The front end of the pressure member 13 also includes a front cover 15, which covers the front end of the receiving portion 1322. The front cover 15 is recessed rearward to form a negative pressure area 151. By providing the front cover 15, on the one hand, the receiving portion 1322 is covered, shielding and protecting the drive circuit board 4; on the other hand, the negative pressure area 151 formed by the rearward recess of the front cover 15 can compensate for air at the air outlet 163, thereby increasing the airflow at the air outlet 163.

[0086] like Figures 2-1 to 2-4As shown, in this embodiment, the motor 3 is a three-phase motor, and the coil 311 includes twelve windings. The large number of windings limits the internal space of the motor 3. By omitting the drive circuit board 4 between the base 131 and the stator 31, the electrical connection between the leads of the coil 311 and the drive circuit board 4 becomes simpler and more convenient. Simultaneously, the space between the base 131 and the stator 31 can be further reduced, resulting in a more rational internal space distribution for the portable fan, thereby achieving miniaturization of the portable fan.

[0087] like Figure 2-5 The diagram shown is a schematic representation of a second embodiment of the portable fan of this application. The main difference from the first embodiment is that the drive circuit board 4 is housed within the handheld portion 17 and is located between the switch 5 and the interface 6. The switch 5 is connected to the drive circuit board 4, or the interface 6 is connected to the drive circuit board 4. Other structures and performance are basically the same as in the first embodiment and will not be described further here.

[0088] like Figure 2-6 The diagram shown is a schematic representation of a third embodiment of the portable fan of this application. The main difference from the first embodiment is that the drive circuit board 4 is housed within the handheld portion 17 and located below the battery 7. Other structures and performance characteristics are essentially the same as the first embodiment and will not be described again here.

[0089] The portable fan of this embodiment has the following advantages: by not placing the drive circuit board between the base and the stator, the electrical connection between the coil leads and the drive circuit board is simpler and more convenient. At the same time, the space between the base and the stator can be further reduced, making the internal space distribution of the portable fan more reasonable, thereby realizing the miniaturization of the portable fan.

[0090] Example 3-1, see Figures 3-1 to 3-5 As shown.

[0091] A portable fan includes an air delivery section 100; such as Figures 3-1 to 3-3As shown, the air supply unit 100 includes a housing 1 with a receiving chamber, an air supply assembly 2 disposed within the receiving chamber of the housing 1, a display screen 3 disposed at the front end of the housing 1, an air outlet disposed along the outer periphery of the display screen 3, and an air inlet disposed at the rear end of the housing 1; the display screen 3 is used to display the working status. It should be noted that, in this embodiment, the front end refers to the direction facing the user during use, and the rear end refers to the direction away from the user during use; the inner refers to the direction facing the central axis of the housing 1, and the outer refers to the direction away from the central axis of the housing 1; the top refers to the direction of the handheld part 200 facing the air supply unit 100. During use, the display screen 3 can be used to display the remaining battery power, current wind speed, and charging level.

[0092] like Figure 3-4 As shown, the display screen 3 is positioned corresponding to the central axis region of the accommodating chamber, and the display screen 3 is at least partially a curved surface that is concave from the front end to the rear end of the housing 1. Preferably, in this embodiment, the display screen 3 is concave axially towards the rear end of the housing 1 from the central axis, so that the front side of the display screen 3 is a concave mirror shape. The front plane of the display screen 3 is a concave surface that is recessed towards the rear end of the housing 1, which concentrates the airflow flowing out of the air outlet in the area corresponding to the display screen 3, making the airflow blown by the portable fan more concentrated, improving the blowing effect, enhancing the user experience, and saving energy while increasing the battery life of the portable fan. Figure 3-3 As shown, in some embodiments, the plane formed by the edge of the display screen 3 is lower than the plane formed by the front edge of the housing 1. That is, the plane formed by the display screen 3 is closer to the air inlet than the plane formed by the front edge of the housing 1, so that the display screen 3 is disposed in the cavity of the housing 1, which protects the display screen 3 and avoids wear or damage to the display screen 3.

[0093] like Figures 3-2 to 3-5As shown, the housing 1 includes an inner shell 11 and an outer shell 12 fitted over the inner shell 11. The inner shell 11 includes a first inner shell 111 and a second inner shell 112 arranged sequentially from front to back. A connecting seat 4 for mounting the display screen 3 is provided on the area corresponding to the rear of the accommodating chamber. A plurality of reinforcing plates 41 are provided between the outer periphery of the connecting seat 4 and the inner wall of the first inner shell 111. The reinforcing plates 41 are evenly distributed along the outer periphery of the connecting seat 4, dividing the air outlet into a plurality of sub-air outlets evenly distributed around the circumference of the display screen 3. In some embodiments, the cross-section of the sub-air outlet along the radial direction of the housing 12 is trapezoidal arc-shaped. The arrangement of the reinforcing plates 41 allows the connecting seat 4 to connect with the inner wall of the first inner shell 111 while providing support for the first inner shell 111, thereby enhancing the strength of the first inner shell 111. The outer wall of the inner shell 11 and the inner wall of the outer shell 12 are respectively provided with mating connection structures. In some embodiments, the mating connection structure includes a connecting groove provided axially on the outer wall of the inner shell 11 and a connecting protrusion provided on the inner wall of the outer shell 12 and mating with the connecting groove; the connecting groove and the connecting protrusion cooperate with each other to guide the outer connection of the inner shell 11 and the outer shell 12, while preventing relative rotation between the inner shell 11 and the outer shell 12, thereby enhancing the connection stability between the inner shell 11 and the outer shell 12.

[0094] The display screen 3 and the connecting base 4 are connected by a first snap-fit ​​assembly. The first snap-fit ​​assembly includes a first buckle 31 circumferentially disposed on the rear side of the display screen 3, and a first locking block 42 disposed at the front end of the mounting base and engaged with the first buckle 31. Further, the first buckle extends from the rear side of the display screen toward the air inlet, and the outer rear end of the first buckle 31 has a bevel. The bevel reduces the resistance when the first buckle 31 and the first locking block 42 are engaged, reducing assembly difficulty, improving installation efficiency, acting as a buffer, preventing damage to the corner area when the first buckle 31 and the first locking block 42 are connected, and facilitating mold demolding during manufacturing. In other embodiments, the first snap-fit ​​assembly includes a first locking block 42 disposed at the rear of the display screen 3 and a first buckle 31 disposed at the front end of the connecting base and engaged with the first locking block 42.

[0095] like Figure 3-5As shown, a second snap-fit ​​assembly is provided in the connection area between the first inner shell 111 and the second inner shell 112; the second snap-fit ​​assembly includes a second snap block 113 disposed at the rear end of the first inner shell 111, and a second latch 114 disposed at the front end of the second inner shell 112 and cooperating with the second snap block 113; alternatively, the positions of the second snap block 113 and the second latch 114 can be interchanged. For example, in some embodiments, the second latch 114 is disposed at the rear end of the first inner shell 111, and the second snap block 113 is disposed at the front end of the second inner shell 112.

[0096] like Figure 3-2 and Figure 3-3 As shown, the air supply assembly 2 includes a drive motor 21 arranged along the central axis of the accommodating chamber, a fan rotor 22 mounted on the shaft 211 of the drive motor 21, and fan blades 23 mounted on the outer wall of the fan rotor 22. The fan rotor 22 is generally in the shape of a hollow frustum, with the end of the fan rotor 22 with a larger inner diameter facing the air outlet. The fan blades 23 are spirally streamlined, reducing the resistance to airflow from the air inlet to the air outlet, further ensuring the airflow effect of the portable fan. The fan rotor 22 extends at least partially to the drive motor 21, and a rotating bearing 24 connected to the inner wall of the fan rotor 22 is fitted on the area of ​​the drive motor 21 corresponding to the fan rotor 22. Optionally, the fan rotor 22 and the shaft 211 of the drive motor 21 are connected by an adapter. The fan rotor 22 and the fan blades 23 are integrally formed. The structure of the drive motor 21 and the fan rotor 22 reduces the space occupied by the air supply section 100, and the setting of the rotating bearing 24 ensures the rotational stability of the fan rotor 22, thereby ensuring the overall operational stability of the portable fan.

[0097] The second inner shell 112 has a cover 115 on the area corresponding to the fan blade 23, which covers the fan blade 23. The rear end of the cover 115 is connected to the air inlet, and the inner diameter of the cover 115 gradually decreases from front to back. The air inlet has a rear cover 5, which has an opening structure 51 for allowing airflow to enter the accommodating chamber. The connection between the cover 115 and the air inlet allows airflow to enter from the air inlet and flow directly towards the fan blade 23 and the fan rotor 22 under the guidance of the cover 115. The fan rotor 22 drives the fan blade 23 to rotate, forming a vortex airflow channel. The airflow channel formed by the cover 115, the fan blade 23, and the fan rotor 22 improves the air guiding effect and enhances the exhaust effect. Preferably, in this embodiment, the rear cover 5 is provided with connecting strips arranged in a radiating pattern along the central axial edge region, and the gaps between the connecting strips form the opening structure 51; more preferably, the connecting strips are in the shape of a rearward convex arc, which reduces the resistance to airflow and ensures the air intake effect. In other embodiments, the rear cover 5 is provided with a plurality of circular, square or other shaped holes to form the opening structure 51.

[0098] Furthermore, such as Figure 3-2 , Figure 3-3 and Figure 3-5 As shown, the rear cover 5 and the second inner shell 112 are connected by a retaining ring 116. The rear cover 5 is snapped onto the rear end of the retaining ring 116. The front end of the retaining ring 116 is connected to the rear end of the second inner shell 112 via a third snap-fit ​​assembly. The third snap-fit ​​assembly includes a third buckle 117 located at the front end of the retaining ring 116 and a third locking block 118 located at the rear end of the second inner shell 112 and cooperating with the third buckle 117. Figure 3-3 As shown, the outer wall of the third buckle 117 is provided with a cut surface to facilitate the engagement of the third buckle 117 with the third buckle block 118 and improve installation efficiency; in other embodiments, the third engagement assembly includes a third buckle block 118 located at the front end of the fixing ring 116, and a third buckle 117 located at the rear end of the second inner shell 112 and cooperating with the third buckle block 118.

[0099] The portable fan also includes a power supply, which is electrically connected to the display screen 3 and the drive motor 21.

[0100] Example 3-2, see Figure 3-6 and Figure 3-7 As shown.

[0101] This embodiment discloses a portable fan including the air supply section 100 described in Embodiment 1. For example... Figure 3-6 and Figure 3-7As shown, the portable fan also includes a handheld part 200 connected to the air delivery unit 100; the handheld part 200 includes a handle 6, a wind speed adjustment knob 7, a charging port 8, and a switch button 9 disposed on the handle 6; the power supply is housed within the handle 6, and the handle 6 has a mounting slot for installing the power supply. The wind speed adjustment knob 7, the charging port 8, and the switch button 9 are electrically connected to the power supply, the charging port 8 is used to charge the power supply, and the switch button 9 is used to control the connection between the drive motor 21, the display screen 3, the wind speed adjustment knob 7, and the power supply. The wind speed adjustment knob 7 is electrically connected to the drive motor 21 to control the output power of the drive motor 21. In use, rotating the wind speed adjustment knob 7 adjusts the output power of the drive motor 21. Driven by the drive motor 21, the fan rotor 22 drives the fan blades 23 to rotate at different speeds, thereby causing airflow to flow from the air inlet to the air outlet at different flow rates. This achieves the effect of controlling the wind speed, meeting the user's personalized usage requirements in different situations and improving the user experience. Preferably, as follows... Figure 3-7 As shown, in this embodiment, the wind speed adjustment knob 7 is located on the side of the handle 6 facing the user for easy operation; the charging port and the switch button are located on the side of the handle 6 away from the user. In some embodiments, a dust cover may also be provided on the charging port to prevent dust, water, etc. from entering the charging port.

[0102] like Figure 3-7 As shown, the top of the handle 6 extends into the housing 1 of the air supply unit 100. Specifically, the top of the handle 6 includes a first connecting member 61 extending into the housing 1 corresponding to the air outlet, and a second connecting member 13 corresponding to the first connecting member 61 is provided at the air outlet. The first connecting member 61 and the second connecting member 13 are connected by a first fastener 14. In some embodiments, to further enhance the stability of the connection between the handheld part 200 and the air supply unit 100, the handle 6 also includes a first connecting plate 62 extending into the housing 1 corresponding to the air inlet, and a second connecting plate 15 corresponding to the first connecting plate 62 is provided at the air inlet. The first connecting plate 62 and the second connecting plate 15 are connected by a second fastener 16. The first connecting plate 62 and the first connecting member 61 are disposed opposite to each other.

[0103] When in use, turn on the switch button 9, the display screen 3 lights up to show the working status, and rotate the wind speed adjustment knob 7 to adjust the air outlet speed.

[0104] It is understood that in another embodiment, the portable fan may consist of the air delivery unit alone, which may also be connected to other portable parts, such as a neckband-style portable fan, in which case the portable fan includes a flexible wearable part connected to the air delivery unit.

[0105] Example 4, see Figures 4-1 to 4-6 As shown.

[0106] In another possible embodiment, see [link to relevant documentation]. Figure 4-1 , Figure 4-3 and Figure 4-4 The handheld fan 101 includes: a fan body 1 and a handle 2 connected to the fan body 1; the handle 2 has a control circuit board inside and a control unit 21 connected to the control circuit board; the control unit 21 is embedded in the handle 2 and partially exposed on the handle 2; the control unit 21 includes a scroll wheel button 211 and a spring connected to the scroll wheel button, the air volume of the handheld fan 101 is adjusted by scrolling the scroll wheel button 211, and the working state of the handheld fan 101 is adjusted by pressing the scroll wheel button 211.

[0107] In one feasible embodiment, please refer to Figure 4-6 The control unit 21 also includes a rotating shaft 213 connected to the roller button 211 and a roller rotation encoder 214 connected to the rotating shaft 213. The control circuit board is provided with an air volume adjustment circuit, which is connected to the roller rotation encoder 214 to realize the air volume of the portable fan 100 without speed adjustment.

[0108] In another possible embodiment, see [link to relevant documentation]. Figure 4-1 , Figure 4-3 , Figure 4-4 and Figure 4-6 The control unit 21 also includes a bearing 212, a rotating shaft 213 connected to the inner ring of the bearing 212, and a roller rotation encoder 214 connected to the rotating shaft 213. The outer ring of the bearing 212 is connected to the roller button 211. The control circuit board is equipped with an air volume adjustment circuit, which is connected to the roller rotation encoder 214 to realize the air volume of the handheld fan 101 without speed adjustment.

[0109] The roller encoder 214 is mounted on the control circuit board. When the roller button 211 is rolled, it drives the rotating shaft 213 to rotate around the central axis. The roller encoder 214 outputs a digital signal, which is processed by the control circuit board to realize stepless adjustment of the air volume of the portable fan 100 and the handheld fan 101.

[0110] In another possible embodiment, see [link to relevant documentation]. Figure 4-2 and Figure 4-4The rotating shaft 213 is connected to a spring (not shown). A switch control circuit is also provided on the control circuit board, and the scroll wheel button 211 is connected to the switch control circuit via the spring. Optionally, the control circuit board is vertically mounted, and springs are installed in the contacts on the control circuit board to reset the scroll wheel button 211. When the scroll wheel button 211 is pressed, the switch control circuit is activated under pressure, and the handheld fan 101 starts working. At this time, scrolling the scroll wheel button 211 allows for stepless adjustment of the airflow of the handheld fan 101. When the airflow of the handheld fan 101 can be adjusted steplessly by scrolling the scroll wheel button 211, pressing the scroll wheel button 211 disconnects the switch control circuit, and the handheld fan 101 stops working. Through the above methods, the safety of the handheld fan 101 can be improved, energy consumption reduced, and losses from accidental activation, deactivation, or misoperation can be minimized.

[0111] In another possible embodiment, see [link to relevant documentation]. Figure 4-4 The bearing 212 includes a main body 2121 and annular portions 2122 located on opposite sides of the main body 2121. A receiving cavity is formed in the middle of the annular portion 2122 to accommodate the scroll button 211. Optionally, the scroll button 211 is a tire-shaped component, including two parallel circular end faces and an annular circumferential surface connecting the peripheries of the circular end faces. Multiple arc-shaped grooves are evenly distributed along the circumference of the annular circumferential surface. The arc-shaped grooves facilitate user scrolling of the scroll button 211, improving the user experience. Optionally, the diameter of the annular portion is slightly larger than the diameter of the scroll button 211, which can effectively protect the scroll button 211 and extend its service life.

[0112] In one possible embodiment, a battery compartment 22 is provided inside the fan body 20, and a battery 221 is housed inside the battery compartment 22. The control circuit board is connected to the battery 221. In another possible embodiment, please refer to... Figure 4-1 and Figure 4-3 The handle 2 has a battery compartment 22 inside. Optionally, the battery is a rechargeable battery, which further enhances the convenience and portability of the portable fan 100 and the handheld fan 101.

[0113] In one feasible embodiment, please refer to Figure 4-5 and Figure 4-6 The roller encoder 214 includes a first output terminal 2141 and a second output terminal 2142. The air volume adjustment circuit includes a first adjustment module 201 and a second adjustment module 202. The first output terminal 2141 is connected to the first adjustment module 201, and the second output terminal 2142 is connected to the second adjustment module 202. Both the first adjustment module 201 and the second adjustment module 202 are connected to the positive terminal of the battery 221.

[0114] Further, please see Figure 4-4 , Figure 4-5 and Figure 4-6 The first adjustment module 201 includes a first capacitor C1, a first resistor R1, and a second resistor R2; the second adjustment module 202 includes a second capacitor C2, a third resistor R3, and a fourth resistor R4. The first output terminal 2141 of the roller encoder 214 is connected to one end of the first resistor R1 and one end of the second resistor R2. The other end of the first resistor R1 is connected to one end of the first capacitor C1, and the other end of the second resistor R2 is connected to the positive terminal of the battery 221. The other end of the first capacitor C1 is grounded. The second output terminal 2142 of the roller encoder 214 is connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other end of the third resistor R3 is connected to the positive terminal of the battery 221, and the other end of the fourth resistor R4 is connected to one end of the second capacitor C2. The other end of the second capacitor C2 is grounded. The third output terminal 2143 of the roller encoder 214 is grounded. By rotating the encoder 214 with the roller, the roller button 211 can generate multiple different digital signals, and then steplessly control the speed of the portable fan 100 and the handheld fan 101 based on the multiple different digital signals, thereby improving the user experience.

[0115] In one feasible embodiment, the portable fan 100 further includes a switch button 216 disposed on the fan body 20, the switch button 216 being exposed on the fan body 20, and the switch button 216 being used to adjust the operating state of the portable fan 100. Pressing the switch button 216 starts the portable fan 100, at which time the scroll wheel button 211 can be used to adjust the airflow of the portable fan 100 at a constant speed. Pressing the switch button 216 again stops the portable fan 100 from operating.

[0116] In one feasible embodiment, the control circuit board is further provided with a working state adjustment circuit, and the switch button 216 is connected to the switch control circuit to adjust the working state of the portable fan 100 by pressing the switch button 216. When the switch button 216 is pressed, the working state adjustment circuit is turned on, and the portable fan 100 starts working. At this time, the scroll wheel button 211 can adjust the air volume of the portable fan 100 at a constant speed. When the scroll wheel button 211 can adjust the air volume of the portable fan 100 at a constant speed, pressing the switch button 216 again will turn off the working state adjustment circuit, and the portable fan 100 will stop working. Through the above method, the safety of the portable fan 100 can be improved and energy consumption can be reduced.

[0117] In another possible embodiment, see [link to relevant documentation]. Figure 4-1 , Figure 4-2 and Figure 4-4The handheld fan 101 also includes an anti-accidental touch button 215 located on the handle 2. The anti-accidental touch button 215 is exposed on the handle 2 and is used to prevent accidental activation of the handheld fan 101. Optionally, the anti-accidental touch button 215 can be a push-button switch or a toggle switch. In another achievable embodiment, after tossing the anti-accidental touch button and pressing the scroll wheel button 211, the handheld fan 101 starts working. At this time, scrolling the scroll wheel button 211 allows for stepless adjustment of the airflow of the handheld fan 101. By using both the anti-accidental touch button 215 and the scroll wheel button 211 for dual activation, the handheld fan 101 is prevented from being activated by other objects pressing the scroll wheel button 211, further improving the safety, energy efficiency, and environmental friendliness of the handheld fan 101.

[0118] In another possible embodiment, see [link to relevant documentation]. Figure 4-1 , Figure 4-2 and Figure 4-4 The anti-accidental touch button 215 is located below the fan body 1, and the anti-accidental touch button 215 and the scroll wheel button 211 are located on opposite sides of the handle 2. Optionally, the scroll wheel button 211 and the anti-accidental touch button 215 are located below the handle 2, in a slightly upper-middle position, which is more in line with ergonomic usage habits and improves user experience. The anti-accidental touch button 215 and the scroll wheel button 211 are located on opposite sides of the handle 2 to prevent the anti-accidental touch button 215 from being accidentally activated by an object on the same side after the scroll wheel button 211 is pressed. This would prevent the handheld fan 101 from being accidentally started.

[0119] In one possible embodiment, the surface of the fan body 20 has a second opening 24 for exposing the scroll wheel button 211. In another possible embodiment, please refer to... Figure 4-1 and Figure 4-4 The surface of the handle 2 has a second opening 24 for the scroll wheel button 211 to be exposed. A mounting plate 241 is embedded in the second opening 24, and the scroll wheel button 211 is exposed outside the second opening 24 through the mounting plate 241. Optionally, the shape of the mounting plate 241 matches the scroll wheel button 211.

[0120] In one possible embodiment, the surface of the fan body 20 has a first opening 23 for exposing the switch button 216. In another possible embodiment, please refer to... Figure 4-1 and Figure 4-4 The surface of the handle 2 has a first opening 23 for exposing the anti-accidental touch button 215. Optionally, the shape of the first opening 23 matches the anti-accidental touch button 215, and the anti-accidental touch button 215 is exposed outside the handle 2 through the first opening 23. Optionally, the bottom of the handle 2 also has a lanyard hole 25, which is used to install a lanyard or lanyard decoration, making it easy to put away or take out the handheld fan 101 while improving the appearance of the handheld fan 101. Optionally, the lanyard hole 25 is located on the same side as the first opening 23.

[0121] The beneficial effects of this application are as follows: By setting a control circuit board inside the fan body of the portable fan, the control circuit board is connected to a control unit, which is embedded in the fan body. The control unit includes a scroll wheel button for adjusting the airflow of the portable fan without stepless speed control. Through this method, the portable fan of this application can adjust the airflow of the portable fan without stepless speed control, and freely adjust the wind speed.

[0122] Example 6-1, see Figures 5-1 to 5-10 As shown.

[0123] Please see Figures 5-1 to 5-10 , Figure 5-1 This is a schematic diagram of a handheld structure for a handheld fan provided in an embodiment of this application. Figure 5-2 This is a schematic diagram of the mounting bracket 2 and circuit board assembly in a handheld structure for a handheld fan provided in an embodiment of this application. Figure 5-3 This is a schematic diagram of the gear knob assembly 51 and battery 4 in a handheld structure for a handheld fan provided in an embodiment of this application. Figure 5-4 This is a schematic diagram of the structure of the protective switch button assembly 52 in the handheld structure of a handheld fan provided in an embodiment of this application. Figure 5-5 This is a schematic diagram of the handheld part 1 and the air delivery structure 6 in a handheld structure for a handheld fan provided in an embodiment of this application. Figure 5-6 This is a schematic diagram of the clamping plate 14 in a handheld structure for a handheld fan, provided in an embodiment of this application. Figure 5-7 This is a schematic diagram of the structure of the first support plate 24 and the second support plate 25 in a handheld structure for a handheld fan provided in an embodiment of this application. Figure 5-8 This is a schematic diagram of the structure of the accommodating space 27 in the handheld structure for a handheld fan, provided in an embodiment of this application. Figure 5-9 This is a schematic diagram of the isolation plate 26 in a handheld structure for a handheld fan provided in an embodiment of this application. Figure 5-10 This is a schematic diagram of the structure of the first protrusion 22 and the second protrusion 23 in a handheld structure for a handheld fan provided in an embodiment of this application. Embodiment 1 of this application provides a handheld structure for a handheld fan, including a handheld part 1 with a hollow cavity 11, a mounting frame 2, a circuit board assembly, a battery 4, and a control mechanism. The handheld part 1 with the hollow cavity 11, the mounting frame 2, the circuit board assembly, the battery 4, and the control mechanism will now be described in detail:

[0124] For the handheld part 1 and the mounting bracket 2, which have a hollow cavity 11:

[0125] The handheld part 1 has a first through groove 12 facing the gear knob assembly 51, and a second through groove 13 facing the protection switch button assembly 52. ​​The hollow cavity 11 contains clamping plates 14 located on both sides of the battery 4, and a sealing cover 15 detachably connected to the clamping plates 14. The clamping plates 14 are connected to the mounting bracket 2, which is located within the hollow cavity 11. Positioning posts 141 are provided on the clamping plates 14, and positioning holes 21 corresponding to the positioning posts 141 are provided on the mounting bracket 2. The positioning posts 141 are inserted into the positioning holes 21. The sealing cover 15 and the handheld part 1 enclose the hollow cavity 11. The mounting bracket 2 may include a first support plate 24, a second support plate 25, a frame 28 having a receiving space 27, and a first protrusion 22 and a second protrusion 23 respectively disposed on both sides of the frame 28. The first protrusion 22 abuts against the first circuit board 31, and the first circuit board 31 is located between the first protrusion 22 and the battery 4. The second protrusion 23 abuts against the second circuit board 32, and the second circuit board 32 is located between the second protrusion 23 and the battery 4. The first support plate 24 is snapped into the first circuit board 31, and the protection switch button assembly 52 is disposed on the first support plate 24. The second support plate 25 is snapped into the second circuit board 32. The first circuit board 31 is connected to the second circuit board 32 through a wire passing through the receiving space 27. The gear knob assembly 51 is disposed on the second support plate 25. An isolation plate 26 may also be provided on the frame 28. The isolation plate 26 is located between the first circuit board 31 and the second circuit board 32, and the isolation plate 26 is located in the accommodating space 27. The wires connecting the first circuit board 31 pass through the isolation plate 26 and are connected to the second circuit board 32.

[0126] Specifically, the handheld part 1 may include an external handheld housing and a hollow cavity 11 inside the handheld housing. The hollow cavity 11 has space to accommodate the mounting bracket 2, circuit board assembly, battery 4, and control mechanism. A first through groove 12 and a second through groove 13 may be provided on both sides of the handheld part 1. The first through groove 12 has space to accommodate the gear knob assembly 51, and the second through groove 13 has space to accommodate the protection switch button assembly 52. ​​Two clamping plates 14 are located inside the hollow cavity 11 and can be slidably mounted on the inner wall of the handheld housing. A positioning post 141 is fixedly provided at one end of the clamping plate 14. The positioning post 141 can be inserted into the positioning hole 21 at the bottom of the mounting bracket 2. The clamping plates 14 provide support and fixation for the mounting bracket 2. A snap-fit ​​groove can be provided at the other end of the clamping plate 14, and a snap-fit ​​component matching the snap-fit ​​groove is provided on the sealing cover 15. The snap-fit ​​component and the snap-fit ​​groove engage with each other, making it easy to install the sealing cover 15 on the clamping plate 14 and easy to remove the sealing cover 15 from the clamping plate 14. The battery 4 can be placed between the two clamping plates 14, with the sealing cover 15 located at the bottom of the battery 4 and the mounting bracket 2 located at the top of the battery 4. The clamping plates 14, the sealing cover 15, and the mounting bracket 2 can limit the movement of the battery 4 around its perimeter, which helps to make the overall structure more compact.

[0127] It should be noted that a first protrusion 22 and a second protrusion 23 can be respectively provided on the top of both sides of the frame 28. The first protrusion 22 limits the first circuit board 31 downward. The first circuit board 31 can be located between the first protrusion 22 and the battery 4. The position of the first circuit board 31 can be constrained in the vertical direction by the first protrusion 22 and the battery 4. The first support plate 24 and the first circuit board 31 are interlocked. For example, a connector 241 is provided on the first support plate 24, and a matching slot 311 is provided on the first circuit board 31. The connector 241 on the first support plate 24 can engage with the slot 311 on the first circuit board 31. Alternatively, a slot 311 is provided on the first support plate 24, and a matching connector 241 is provided on the first circuit board 31. The connector 241 on the first circuit board 31 can engage with the slot 311 on the first support plate 24. This facilitates the installation and maintenance of the first circuit board 31. Simultaneously, the frame 28 and the first support plate 24 can constrain the position of the first circuit board 31 in the horizontal direction, preventing displacement during use. Since the structure and principle of the interlocking between the second support plate 25 and the second circuit board 32 are the same as those of the interlocking between the first support plate 24 and the first circuit board 31, they will not be described further here. In addition, the isolation plate 26 installed on the frame 28 can isolate the wires connecting the first circuit board 31 and the second circuit board 32. For example, for the wires connecting the first circuit board 31 and the second circuit board 32, after one end of the wire is connected to the second circuit board 32, the other end of the wire can be located in the space between the isolation plate 26 and the first circuit board 31. By separating the wire from the gear knob assembly 51 described below through the isolation plate 26, the layout of the wires can be optimized in a limited space, while avoiding interference of the wires with the gear knob assembly 51.

[0128] For the circuit board assembly, battery 4, and control mechanism:

[0129] A circuit board assembly is mounted on the mounting bracket 2. The circuit board assembly includes a first circuit board 31 and a second circuit board 32. The first circuit board 31 is mounted on the mounting bracket 2 and is connected to both the protection switch button assembly 52 and the battery 4. The second circuit board 32 is mounted on the mounting bracket 2 and is connected to both the gear shift knob assembly 51 and the first circuit board 31. The second circuit board 32 and the first circuit board 31 are distributed opposite to each other. The battery 4 is disposed inside the hollow cavity 11. The control mechanism includes a gear shift knob assembly 51, a protection switch button assembly 52, and a charging port 53. The gear shift knob assembly 51 is mounted on the mounting bracket 2 and is connected to the battery 4 via the circuit board assembly. The gear selector knob assembly 51 includes a support block 511 mounted on the mounting bracket 2, a knob 512, and a rotating shaft 513 rotatably mounted on the support block 511. The support block 511 has an opening area 5111, and the rotating shaft 513 passes through the knob 512. The knob 512 is located in the opening area 5111 and faces the first through slot 12. The safety switch button assembly 52 is mounted on the mounting bracket 2 and connected to the circuit board assembly. The safety switch button assembly 52 and the gear selector knob assembly 51 are distributed opposite to each other. The charging port 53 is mounted on the mounting bracket 2 and connected to the first circuit board 31. The charging port 53 faces the second through slot 13.

[0130] Specifically, the first circuit board 31 and the second circuit board 32 in the circuit board assembly are distributed opposite to each other on the mounting bracket 2. The first circuit board 31 is connected to the protection switch button assembly 52 and the battery 4 in the control mechanism. The protection switch button assembly 52 can control whether the circuit powered by the battery 4 is open or closed. If the protection switch button assembly 52 is a slide switch, when the button in the slide protection switch button assembly 52 is to one end, the circuit is open, and the fan works. When the button in the slide protection switch button assembly 52 is to the other end, the circuit is closed, and the fan does not work, thus preventing the operator from accidentally turning on the fan by accidentally touching the gear knob assembly 51. The battery 4 can be powered by the first circuit board 31, and the second circuit board 32 is connected to both the gear knob assembly 51 and the first circuit board 31. The support block 511 in the gear knob assembly 51 is installed on the second support plate 25. After the rotating shaft 513 is connected to the knob 512, rotating the knob 512 will drive the rotating shaft 513 to rotate. One end of the rotating shaft 513 can be rotatably installed on the support block 511. For example, a through hole is provided at the connection between the support block 511 and the second circuit board 32, which allows one end of the rotating shaft 513 to be rotatably installed. When the knob 512 in the gear knob assembly 51 is rotated, the speed of the fan connected to the first circuit board 31 and the second circuit board 32 can be adjusted to control the wind speed. The other end of the rotating shaft 513 can contact a spring-loaded button on the second circuit board 32. When the knob 512 located in the opening area 5111 is pushed towards the first circuit board 31, the knob 512 will cause the other end of the rotating shaft 513 to press the spring-loaded button. After the pressed spring-loaded button is connected to the second circuit board 32, the battery level of the battery 4 can be viewed. That is, when the knob 512 in the gear knob assembly 51 is pressed, the battery level of the battery 4 can be viewed. The charging port 53 can refer to a USB interface. The charging port 53 is used to connect to an external power source to charge the battery 4.

[0131] This application provides a handheld structure for a handheld fan. A mounting bracket 2 and a battery 4 are disposed within the hollow cavity 11 of the handheld part 1. A circuit board assembly is disposed on the mounting bracket 2. A speed control knob assembly 51 in the control mechanism is disposed on the mounting bracket 2 and connected to the battery 4 via the circuit board assembly. A first through slot 12 in the handheld part 1 faces the speed control knob assembly 51. Thus, the circuit board assembly, speed control knob assembly 51, mounting bracket 2, and battery 4 are all located inside the hollow cavity 11 of the handheld part 1. The speed control knob assembly 51 adjusts the circuit board assembly connected to the battery 4 to control the fan speed, which helps reduce the space occupied by the overall handheld fan structure. The handheld part 1 is easy for the operator to grip, thereby reducing the overall size and space occupied by the handheld fan, making it easy to carry. This achieves the technical effect of small size, small space occupation, and easy portability.

[0132] To provide a detailed description of the handheld fan provided in this application, the above embodiment 1 provides a detailed description of a handheld structure for a handheld fan. Based on the same concept, this application also provides a handheld fan, as detailed in embodiment 2.

[0133] Example 6-2

[0134] This embodiment provides a handheld fan, including a handheld structure for the handheld fan and an air supply structure 6 connected to the handheld structure. The air supply structure 6 can be connected to the handheld part 1.

[0135] This application provides a handheld fan. A mounting bracket 2 and a battery 4 are disposed within the hollow cavity 11 of the handheld part 1. A circuit board assembly is disposed on the mounting bracket 2. A speed control knob assembly 51 in the control mechanism is disposed on the mounting bracket 2 and connected to the battery 4 via the circuit board assembly. A first through slot 12 is formed in the handheld part 1, directly opposite the speed control knob assembly 51. The handheld part 1 is connected to an air delivery structure 6. Thus, the circuit board assembly, speed control knob assembly 51, mounting bracket 2, and battery 4 are all located inside the hollow cavity 11 of the handheld part 1. The fan speed is controlled by adjusting the circuit board assembly connected to the battery 4 via the speed control knob assembly 51. This reduces the space occupied by the overall structure of the handheld fan. The handheld part 1 is easy for the operator to grip, thereby reducing the overall size and space occupied by the handheld fan, making it easy to carry. This achieves the technical effect of small size, small space occupation, and easy portability.

[0136] Example 7, see Figures 6-1 to 6-8 As shown.

[0137] This application discloses a handheld fan. An airflow channel 111 is formed in the inner shell 11 of the air supply section 1. An air inlet and an air outlet are connected to both sides of the airflow channel 111. A fan assembly 13 is disposed within the airflow channel 111, and a shell 12 covers the outside of the inner shell 11. In the handheld section 2, a handheld shell 21 covers the outside of the mounting mechanism, extending into the mounting opening 121 of the shell 12. A fixing member 23 passes through the shell 12 and the handheld shell 21 of the air supply section 1 and connects to the mounting mechanism. Thus, the handheld shell of the handheld section 2 and the mounting mechanism are connected to the shell 12 of the air supply section 1 via the fixing member 23. The airflow channel 111 formed by the inner shell 11 of the air supply section 1 allows for air circulation, which helps improve the compactness of the structure and enhances the stability and reliability during operation. This achieves the technical effects of improved compactness and reliability.

[0138] Please see Figures 6-1 to 6-8 , Figure 6-1 This is a schematic diagram of the structure of a handheld fan provided in an embodiment of this application. Figure 6-2This is a schematic diagram of the structure of the mounting bracket 221 in a handheld fan provided in an embodiment of this application. Figure 6-3 This is a schematic diagram of the structure of the handheld housing 21 in a handheld fan provided in an embodiment of this application. Figure 6-4 This is a schematic diagram of the control mechanism in a handheld fan provided in an embodiment of this application. Figure 6-5 This is a schematic diagram of the structure of the mounting slot 114 in a handheld fan provided in an embodiment of this application. Figure 6-6 This is a schematic diagram of the structure of the outer casing 12 of a handheld fan provided in an embodiment of this application. Figure 6-7 This is a schematic diagram of the structure of the first circuit board 4 in a handheld fan provided in an embodiment of this application. Figure 6-8 This is a schematic diagram of the inner shell 11 of a handheld fan provided in an embodiment of this application. Embodiment 1 of this application provides a handheld fan, including an air delivery part 1 and a handheld part 2. The air delivery part 1 and the handheld part 2 will now be described in detail:

[0139] For the air supply section 1 and the handheld section 2:

[0140] The air supply unit 1 includes an inner shell 11, an outer shell 12, and a fan assembly 13. The inner shell 11 forms an air passage 111, an air inlet communicating with one side of the air passage 111, and an air outlet communicating with the other side of the air passage 111. The fan assembly 13 is disposed in the air passage 111. The outer shell 12 is used to cover the outside of the inner shell 11 and has a mounting opening 121. The inner shell 11 may be provided with a limiting plate 112 and a baffle 113. The limiting plate 112 and the baffle 113 surround to form a mounting groove 114, and one end of the handheld housing 21 is inserted into the mounting groove 114. The handheld part 2 includes a handheld housing 21, a mounting mechanism, and a fixing member 23. The handheld housing 21 covers the outside of the mounting mechanism and extends into the mounting opening 121. The fixing member 23 passes through the outer shell 12 and the handheld housing 21 in sequence and is connected to the mounting mechanism. The mounting mechanism includes a mounting bracket 221, a clamping plate 222, and a sealing cover 223. The mounting bracket 221 is connected to the fixing member 23. The clamping plate 222 is connected to the mounting bracket 221, and the sealing cover 223 is detachably connected to the clamping plate 222. The sealing cover 223, the clamping plate 222, and the mounting bracket 221 enclose a space for placing the battery. A first connecting member 115 is provided on the inner shell 11, and a second connecting member 2211 is provided in the mounting mechanism. The fixing member 23 passes through the first connecting member 115 and the second connecting member 2211.

[0141] Specifically, the air passage 111 formed inside the inner shell 11 is used for gas circulation. After the gas enters the air passage 111 from the air inlet, the gas entering the air passage 111 will be discharged from the air outlet. The outer shell 12 covers the outside of the inner shell 11. The mounting opening 121 provided on the outer shell 12 has space to accommodate one end of the handheld housing 21 in the handheld part 2 and the mounting bracket 221 in the mounting mechanism. A limiting plate 112 and a baffle 113 are provided in the inner shell 11 opposite to the mounting opening 121. A mounting groove 114 is formed between the limiting plate 112 and the baffle 113. The mounting groove 114 allows one end of the handheld housing 21 to be inserted, and the mounting groove 114 can limit one end of the handheld housing 21.

[0142] It should be noted that one end of the handheld housing 21 in the handheld part 2 extends into the mounting port 121 and is inserted into the mounting groove 114. A first connecting member 115 can be provided on the mounting bracket 221 in the mounting mechanism, and a second connecting member 2211 can be provided on the inner housing 11 at the position corresponding to the mounting bracket 221. After passing through the outer shell 12, the handheld housing 21, and the second connecting member 2211 on the inner housing 11, the fastener 23 connects to the first connecting member 115 on the mounting bracket 221. The fastener 23 can include bolts. Two clamping plates 222 can be provided on both sides inside the handheld housing 21. The clamping plates 222 are connected to the mounting bracket 221, and the sealing cover 223 can be detachably connected to the clamping plates 222. For example, a snap-fit ​​connector can be provided on the sealing cover 223, and a snap-fit ​​groove can be provided on the clamping plate 222 to achieve a detachable connection between the sealing cover 223 and the clamping plate 222. The battery can be placed in the space enclosed by the sealing cover 223, the clamping plate 222 and the mounting bracket 221.

[0143] This application embodiment provides a handheld fan that further includes a control mechanism, a first circuit board 4, a second circuit board 41, and a third circuit board 42. The control mechanism includes a gear knob assembly 31, a safety switch button assembly 32, and a charging port 33. The gear knob assembly 31 is disposed on the mounting mechanism. The handheld housing 21 has a first through slot 211 facing the gear knob assembly 31 and a second through slot 212 facing the safety switch button assembly 32. The first circuit board 4 is disposed on the mounting mechanism and connected to the gear knob assembly 31. The safety switch button assembly 32 is disposed on the mounting bracket 221, and the safety switch button assembly 32 and the gear knob assembly 31 are distributed opposite to each other. The second circuit board 41 is disposed on the mounting bracket 221 and connected to both the safety switch button assembly 32 and the first circuit board 4. The charging port 33 is disposed on the mounting bracket 221 and connected to the second circuit board 41, facing the second through slot 212. The third circuit board 42 is disposed on the inner shell 11, and the third circuit board 42 is connected to the second circuit board 41.

[0144] Specifically, the first circuit board 4 and the second circuit board 41 are distributed opposite to each other on the mounting bracket 221 of the mounting mechanism. The first circuit board 4 is connected to the gear knob assembly 31 in the control mechanism. The second circuit board 41 is connected to the protection switch button assembly 32, the charging port 33, the battery, and the first circuit board 4. The third circuit board 42 is connected to the second circuit board 41. The third circuit board 42 can also be connected to the motor in the fan assembly 13, which drives the fan blades to rotate. The protection switch button assembly 32 can control whether the circuit powered by the battery is closed or open. If the protection switch button assembly 32 is a slide switch, when the button in the slide protection switch button assembly 32 is to one end, the circuit is closed, and the motor in the fan assembly 13 works to drive the fan blades to rotate. When the button in the slide protection switch button assembly 32 is to the other end, the circuit is open, and the motor in the fan assembly 13 does not work, and the fan blades do not rotate, thus preventing the operator from accidentally turning on the fan by accidentally touching the gear knob assembly 31. The speed control knob assembly 31 can be used to adjust the speed of the fan blades connected to the third circuit board 42, thereby controlling the wind speed. For example, rotating the knob in the speed control knob assembly 31 adjusts the fan speed, and pressing the knob in the speed control knob assembly 31 displays the battery level. The charging port 33 can be a USB interface, used to connect to an external power source to charge the battery.

[0145] This application provides a handheld fan. An airflow channel 111 is formed in the inner shell 11 of the air supply section 1. An air inlet and an air outlet are connected to both sides of the airflow channel 111. A fan assembly 13 is disposed within the airflow channel 111, and a shell 12 covers the outside of the inner shell 11. In the handheld section 2, a handheld housing 21 covers the outside of the mounting mechanism. The handheld housing 21 extends into the mounting opening 121 of the shell 12. A fixing member 23 passes through the shell 12 and the handheld housing 21 of the air supply section 1 and connects to the mounting mechanism. Thus, the handheld housing of the handheld section 2 and the mounting mechanism are connected to the shell 12 of the air supply section 1 via the fixing member 23. The airflow channel 111 formed by the inner shell 11 of the air supply section 1 allows for air circulation, which helps improve the compactness of the structure and enhances the stability and reliability during operation. This achieves the technical effects of improved compactness and reliability.

[0146] Example 8-1, see Figures 7-1 to 7-11 As shown.

[0147] This application discloses an air delivery device for a handheld fan. An airflow channel 11 is formed within an inner shell 1, with its two sides connected to an air inlet 23 and an air outlet 24, respectively. At least a portion of a fan assembly 3 is disposed within the airflow channel 11. An outer shell 2 covers the outside of the inner shell 1. One side of a wiring opening 12 in the inner shell 1 faces the electrical connection portion of the fan assembly 3, and the other side faces the electrical connection portion of the handheld fan's handle 5. The electrical connection portion of the fan assembly 3 is electrically connected to the electrical connection portion of the handheld fan 5 via a wire passing through the wiring opening 12. This allows the wiring opening 12 in the inner shell 1 to allow the wire connected to the electrical connection portion of the fan assembly 3 to enter and exit. The wire connected to the electrical connection portion of the fan assembly 3 passes through the wiring opening 12 from a position directly opposite the electrical connection portion of the handheld fan's handle 5 before connecting to the handle portion of the handheld fan's handle 5. This reduces the wire length, enhances durability, and improves the aesthetics of the wiring. This achieves the technical effects of improving the stability, aesthetics, and durability of the wiring.

[0148] Please see Figures 7-1 to 7-11 , Figure 7-1 This is a schematic diagram of the air delivery device of a handheld fan provided in an embodiment of this application. Figure 7-2 This is a schematic diagram of the mounting bracket 6 in the air delivery device of a handheld fan provided in an embodiment of this application. Figure 7-3 This is a schematic diagram of the handheld part 5 in the air delivery device of a handheld fan provided in an embodiment of this application. Figure 7-4 This is a schematic diagram of the wiring opening 12 in the air delivery device of a handheld fan provided in an embodiment of this application. Figure 7-5 This is a schematic diagram of the wire groove 21 in the air delivery device of a handheld fan provided in this application embodiment. Figure 7-6This is a second schematic diagram of the structure of the wire groove 21 in the air delivery device of a handheld fan provided in this application embodiment. Figure 7-7 This is a schematic diagram of the structure of the speed knob assembly 71 and the safety switch button assembly 72 in the air delivery device of a handheld fan provided in an embodiment of this application. Figure 7-8 This is a schematic diagram of the inner shell 1 and outer shell 2 in the air delivery device of a handheld fan provided in an embodiment of this application. Figure 7-9 This is a schematic diagram of the air inlet 23 and air outlet 24 in the air delivery device of a handheld fan provided in an embodiment of this application. Figure 7-10 yes Figure 7-9 A magnified view of the structure at point A in the middle. Figure 7-11 This is a schematic diagram of the fan assembly 3 in a handheld fan air delivery device according to an embodiment of this application. The handheld fan air delivery device provided in Embodiment 1 of this application includes an inner shell 1, an outer shell 2, and a fan assembly 3. The inner shell 1, outer shell 2, and fan assembly 3 will now be described in detail:

[0149] For the inner casing 1, the fan assembly 3, and the outer casing 2:

[0150] The inner shell 1 has an air passage 11, an air inlet 23 communicating with one side of the air passage 11, and an air outlet 24 communicating with the other side of the air passage 11. At least a portion of the fan assembly 3 is disposed in the air passage 11. The inner shell 1 has a wiring opening 12, one side of which faces the electrical connection portion of the fan assembly 3, and the other side of which faces the electrical connection portion of the handheld fan's handle 5. The electrical connection portion of the fan assembly 3 is electrically connected to the electrical connection portion of the handheld fan 5 via a wire passing through the wiring opening 12. The handheld fan 5 includes a handle 5 with a mounting opening 4, which is connected to the outer shell 2. The mounting opening 4 faces the other side of the wiring opening 12. The air delivery device of the handheld fan provided in Embodiment 1 of this application may further include a mounting bracket 6, a second circuit board 73, and a speed knob assembly 71 disposed on the handheld part 5. At least a portion of the mounting bracket 6 is disposed in the mounting opening 4. The mounting bracket 6 is connected to the inner shell 1 and has a receiving space 61 for wires to pass through. The electrical connection portion of the handheld part 5 includes a first circuit board 7 disposed on the mounting bracket 6 and plugged into the electrical connection portion of the fan assembly 3 via a wire. The second circuit board 73 is disposed on the mounting bracket 6 and plugged into the first circuit board 7 via a wire. The speed knob assembly 71 is disposed on the mounting bracket 6 and connected to the second circuit board 73. The second circuit board 73 and the first circuit board 7 are distributed opposite to each other. The outer shell 2 is used to cover the outside of the inner shell 1. A baffle 22 is provided on the inner shell 1, and the baffle 22 and the inner shell 1 enclose a wire receiving groove 21. At least a portion of the first circuit board 7 is disposed in the wire groove 21.

[0151] Specifically, the air passage 11 formed inside the inner shell 1 is used for gas circulation. Gas enters the air passage 11 from the air inlet 23 and is then discharged from the air outlet 24. The outer shell 2 covers the outside of the inner shell 1. A wiring opening 12 for wires to pass through is provided on the inner shell 1. The two sides of the wiring opening 12 are respectively opposite to the electrical connection part of the fan assembly 3 and the electrical connection part of the handheld fan 5. The electrical connection part of the fan assembly 3 may refer to the circuit board connected to the fan motor. The wires connecting the circuit board pass through the wiring opening 12 and are connected to the first circuit board 7 of the electrical connection part of the handheld fan 5. The mounting opening 4 of the handheld part 5 is directly opposite the wiring opening 12. The accommodating space 61 of the mounting bracket 6 is interconnected with the mounting opening 4 of the handheld part 5. The first circuit board 7 and the second circuit board 73 are distributed opposite each other on the mounting bracket 6. The wires passing through the wiring opening 12 can be plugged into the first circuit board 7 on the mounting bracket 6 after passing through the mounting opening 4 of the handheld part 5. For example, one end of the wire passing through the wiring opening 12 can be plugged into the first circuit board 7 through a connector, which facilitates the connection or separation of the wires and the first circuit board 7. The second circuit board 73 is plugged into the first circuit board 7 through a wire. For example, the second circuit board 73 can be connected to the connector that connects to the first circuit board 7 through a wire, which realizes the connection between the second circuit board 73 and the first circuit board 7, which facilitates the connection or separation of the second circuit board 73 and the first circuit board 7. The gear selector knob assembly 71, connected to the second circuit board 73, can be used to adjust the rotation speed of the fan blades in the fan assembly 3, thereby controlling the wind speed. For example, rotating the knob in the gear selector knob assembly 71 adjusts the fan speed; pressing the knob in the gear selector knob assembly 71 displays the battery level of the battery 8. A baffle 22 is provided in the inner shell 1 near the handheld part 5. The diameter of the inner shell 1 can gradually increase from the air inlet 23 along the air outlet 24, thus forming an inwardly recessed space at the end of the inner shell 1 near the air inlet 23. The baffle 22 can be set in the inwardly recessed space. The inner shell 1 and the baffle 22 together form a wire receiving groove 21. A part of the first circuit board 7 can extend into the inside of the wire receiving groove 21. At the same time, the inside of the wire receiving groove 21 has a space to accommodate the wires connected to the first circuit board 7. Alternatively, the entire first circuit board 7 is located outside the wire receiving groove 21, a part of the wires connected to the first circuit board 7 is located inside the wire receiving groove 21, and the other part of the wires extends out to the outside of the wire receiving groove 21 and connects to the first circuit board 7. This can improve the utilization of space.

[0152] The air delivery device of the handheld fan provided in Embodiment 1 of this application may further include a protection switch button assembly 72 and a battery 8. The protection switch button assembly 72 is disposed on the mounting bracket 6 and is electrically connected to the first circuit board 7. The battery 8 is disposed on the handheld part 5 and is plugged into the first circuit board 7 via a wire.

[0153] Specifically, battery 8 can be installed in the handheld part 5. Battery 8 is connected to the first circuit board 7 via wires, and can power the fan assembly 3. The protective switch button assembly 72, electrically connected to the first circuit board 7, can control whether the circuit powered by battery 8 is open or closed. For example, if the protective switch button assembly 72 is a slide switch, when the button in the slide protective switch button assembly 72 is to one end, the circuit is open, and the motor in the fan assembly 3 drives the fan blades to rotate. When the button in the slide protective switch button assembly 72 is to the other end, the circuit is closed, and the motor in the fan assembly 3 does not work, the fan blades do not rotate, thus preventing the operator from accidentally turning on the fan by accidentally touching the gear knob assembly 71.

[0154] This application provides an air delivery device for a handheld fan. An airflow channel 11 is formed within an inner shell 1, with its two sides connected to an air inlet 23 and an air outlet 24, respectively. At least a portion of a fan assembly 3 is disposed within the airflow channel 11. An outer shell 2 covers the outside of the inner shell 1. One side of a wiring opening 12 in the inner shell 1 faces the electrical connection portion of the fan assembly 3, and the other side faces the electrical connection portion of the handheld fan's handle 5. The electrical connection portion of the fan assembly 3 is electrically connected to the electrical connection portion of the handheld fan 5 via a wire passing through the wiring opening 12. This allows the wiring opening 12 in the inner shell 1 to allow the wire connected to the electrical connection portion of the fan assembly 3 to enter and exit. The wire connected to the electrical connection portion of the fan assembly 3 passes through the wiring opening 12 from a position directly opposite the electrical connection portion of the handheld fan's handle 5 before connecting to the handle portion of the handheld fan's handle 5. This reduces the wire length, enhances durability, and improves the aesthetics of the wiring. This achieves the technical effects of improving the stability, aesthetics, and durability of the wiring.

[0155] To provide a detailed description of the handheld fan provided in this application, the above embodiment 1 provides a detailed description of the air delivery device of the handheld fan. Based on the same concept, this application also provides a handheld fan, as detailed in embodiment 2.

[0156] Example 8-2, see Figures 7-1 to 7-10 As shown.

[0157] Embodiment 2 of this application provides a handheld fan, including the air delivery device of the handheld fan.

[0158] This application provides a handheld fan with an inner shell 1 forming an airflow channel 11. The airflow channel 11 is connected to an air inlet 23 and an air outlet 24 on both sides. At least a portion of a fan assembly 3 is disposed within the airflow channel 11. An outer shell 2 covers the outside of the inner shell 1. One side of the wiring opening 12 of the inner shell 1 faces the electrical connection portion of the fan assembly 3, and the other side faces the electrical connection portion of the handheld fan's handle 5. The electrical connection portion of the fan assembly 3 is electrically connected to the electrical connection portion of the handheld fan 5 via a wire passing through the wiring opening 12. This allows the wiring opening 12 of the inner shell 1 to allow the wire connected to the electrical connection portion of the fan assembly 3 to enter and exit. The wire connected to the electrical connection portion of the fan assembly 3 passes through the wiring opening 12 from a position directly opposite the electrical connection portion of the handheld fan's handle 5 before connecting to the electrical connection portion of the handheld fan's handle 5. This reduces the wire length, enhances durability, and improves the aesthetics of the wiring. This achieves the technical effects of improving the stability, aesthetics, and durability of the wiring.

[0159] The above embodiments merely illustrate preferred implementations of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A portable fan, characterized in that, include: The housing has a communicating air inlet, a receiving cavity and an air outlet, and the housing also includes a base; A fan assembly is housed within the housing. The fan assembly includes a hub and a plurality of fan blades spaced apart on the outer surface of the hub. A rotating shaft is fixed at the center of the inner side of the hub. An electric motor, including a stator and a rotor, the stator including coils, the electric motor being connected to the base; A drive circuit board electrically connected to the leads of the coil drives the fan assembly to rotate, blowing air from the air inlet through the receiving cavity and then out from the air outlet. The handheld part is connected to the housing. The handheld part has a first end and a second end opposite to the first end in the direction from the air inlet to the air outlet. The distribution length of the fan assembly and the motor in the axial direction of the housing is limited within the space defined by the extension lines of the first end and the second end toward the housing.

2. The portable fan as described in claim 1, characterized in that: A hollow sleeve protrudes from the base into the receiving cavity. The stator and the rotor are both housed within the hub. The stator is sleeved outside the sleeve. The rotor is radially positioned between the stator and the hub. The rotating shaft is inserted into the sleeve. The drive circuit board is not located between the base and the stator.

3. The portable fan as described in claim 2, characterized in that: The housing includes a front housing and a rear housing. The housing also includes a pressure member disposed within the front housing. A plurality of connecting blades connect the pressure member and the front housing. The pressure member has a base and a sleeve formed therein. The base is located between the front end and the rear end of the pressure member and forms a rearward clearance space within the pressure member. The sleeve protrudes rearward from the base. The hub includes an annular extension wall. The stator and the rotor are both housed within the extension wall. The extension wall, the stator, and the rotor extend forward into the clearance space.

4. The portable fan as described in claim 3, characterized in that: The base forms a receiving portion forward within the pressure member, the drive circuit board is received in the receiving portion, and the front end of the pressure member also includes a front cover, which covers the front end of the receiving portion and is recessed rearward to form a negative pressure area.

5. The portable fan as described in claim 3, characterized in that: Neither the stator nor the rotor extends forward beyond the extension wall; or, the hub includes a guide surface that increases radially from back to front, the extension wall extends forward beyond the guide surface, the pressurizing member includes a pressurizing surface that increases radially from back to front, and the guide surface and the pressurizing surface are arranged adjacent to each other at intervals.

6. The portable fan as described in claim 1, characterized in that: The housing includes a front housing and a rear housing. The front housing includes a first air vent and a first handheld housing. The rear housing includes a second air vent and a second handheld housing. The first air vent and the second air vent form an air outlet. The first handheld housing and the second handheld housing form a handheld portion. The drive circuit board is housed in the handheld portion.

7. The portable fan as described in claim 6, characterized in that: The handheld unit is equipped with a switch, an interface, and a battery. The switch is connected to the drive circuit board, or the interface is connected to the drive circuit board, and the battery is electrically connected to the drive circuit board.

8. The portable fan as described in claim 7, characterized in that: The switch is a stepless speed control switch.

9. The portable fan as described in claim 6, characterized in that: The first air casing includes a first outer shell and a first inner shell that fit together, the first inner shell and the first outer shell being fitted together, and both the first inner shell and the first outer shell extending horizontally forward; the second air casing includes a second outer shell and a second inner shell that fit together, the rear ends of the second inner shell and the second outer shell being spaced apart and connected by a connector, the second outer shell extending horizontally forward, the second inner shell extending horizontally forward from back to front, and then expanding radially outward, the front end of the second inner shell connecting to the front end of the second outer shell, and the front end of the second inner shell abutting against the rear end of the first inner shell.

10. The portable fan as described in any one of claims 1-9, characterized in that: The motor is a three-phase motor, and the coil includes twelve windings.

Images