Portable fan

Abstract

The invention provides a portable fan which comprises an air supply part and a handheld part, a protrusion is arranged at the end of the handheld part, the protrusion extends in the length direction of the handheld part, and the protrusion is inserted into the air supply part; a protrusion is arranged on the handheld portion, a first connecting piece is arranged on the protrusion, the air supply portion is provided with a second connecting piece, the air supply portion is connected with the handheld portion through a fixing piece, and the fixing piece penetrates through the first connecting piece and the second connecting piece to connect the air supply portion with the handheld portion. The handheld part is partially embedded into the air supply part and / or the air supply part is partially embedded into the handheld part, if the handheld part breaks down or a battery in the handheld part is out of power, the handheld part can be independently replaced, and the replaced handheld part is maintained or charged, so that the handheld part can be replaced independently. And the handheld part capable of working normally or other handheld parts with electricity are replaced, so that the endurance performance of the product is improved.

Description

[0001] This application is a divisional application of the international application filed on October 19, 2023, with application number PCT / CN2023 / 125354. Technical Field

[0002] This application relates to the field of fan technology, and in particular to a portable fan. Background Technology

[0003] The most common portable fans are assembled from front and back shells. If the portable fan malfunctions, it is inconvenient to replace the battery, the repair is complicated, and the battery life is reduced. Summary of the Invention

[0004] Therefore, this application provides a portable fan that can improve battery life.

[0005] This application provides a portable fan, including: an air delivery part and a handheld part. The end of the handheld part is provided with a protrusion that extends along the length of the handheld part and is inserted into the air delivery part. A first connector is provided on the protrusion, and a second connector is provided on the air delivery part. The air delivery part and the handheld part are connected by a fixing member. The fixing member passes through the first connector and the second connector to connect the air delivery part and the handheld part. A portion of the handheld part is embedded in the air delivery part and / or a portion of the air delivery part is embedded in the handheld part.

[0006] In the case of a portable handheld fan, if the handheld part malfunctions or the battery inside the handheld part is dead, the handheld part can be replaced separately. The replaced handheld part can be repaired or charged, and a working handheld part or another handheld part with power can be installed to increase the product's battery life. Attached Figure Description

[0007] Figure 1-1 This is a perspective view of the portable fan described in this application.

[0008] Figure 1-2 yes Figure 1-1 The diagram shows an exploded view of the fan.

[0009] Figure 1-3 yes Figure 1-2 The diagram shows an exploded view of the fan with the sleeve removed.

[0010] Figure 1-4 This is a schematic diagram of the structure of the fan base of the portable fan of this application.

[0011] Figure 1-5 This is a schematic diagram of the pressure mount of the portable fan in this application.

[0012] Figure 1-6This is a schematic diagram of the sleeve of the portable fan of this application.

[0013] Figure 2-1 This is a perspective view of the first embodiment of the portable fan of this application.

[0014] Figure 2-2 This is a cross-sectional view of the first embodiment of the portable fan of this application.

[0015] Figure 2-3 yes Figure 2-2 Enlarged view of section A.

[0016] Figure 2-4 This is a cross-sectional view from another direction of the first embodiment of the portable fan of this application.

[0017] Figure 2-5 This is a cross-sectional view of the second embodiment of the portable fan of this application.

[0018] Figure 2-6 This is a cross-sectional view of the third embodiment of the portable fan of this application.

[0019] Figure 3-1 This is a schematic diagram of the air supply section described in Embodiment 3-1 of this application.

[0020] Figure 3-2 for Figure 3-1 The diagram shows an explosion of the air supply section.

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

[0022] Figure 3-4 This is a schematic diagram of the display screen.

[0023] Figure 3-5 This is a schematic diagram of the assembly of the inner shell.

[0024] Figure 3-6 This is a schematic diagram of the portable fan described in Embodiments 3-2 of this application.

[0025] Figure 3-7 This is a cross-sectional view of the portable fan described in Embodiments 3-2 of this application.

[0026] Figure 4-1 This is a three-dimensional structural diagram of a handheld fan according to an embodiment of this application.

[0027] Figure 4-2 This is a three-dimensional structural diagram of the handheld fan from another angle, according to an embodiment of this application.

[0028] Figure 4-3 This is a three-dimensional structural diagram of a partial structure of an embodiment of this application.

[0029] Figure 4-4 This is an exploded view of an embodiment of this application.

[0030] Figure 4-5 This is a schematic diagram of the airflow regulation circuit according to an embodiment of this application.

[0031] Figure 4-6 This is a schematic diagram of the airflow regulation circuit according to an embodiment of this application.

[0032] Figure 5-1 This is a three-dimensional structural diagram of a handheld fan according to an embodiment of this application.

[0033] Figure 5-2 This is a three-dimensional structural diagram of the handheld fan from another angle, according to an embodiment of this application.

[0034] Figure 5-3 This is a three-dimensional structural diagram of a partial structure of an embodiment of this application.

[0035] Figure 5-4 This is an exploded view of an embodiment of this application.

[0036] Figure 5-5 This is a schematic diagram of the airflow regulation circuit according to an embodiment of this application.

[0037] Figure 5-6 This is a schematic diagram of the airflow regulation circuit according to an embodiment of this application.

[0038] Figure 6-1 This is a schematic diagram of a handheld structure for a handheld fan, provided as an embodiment of this application.

[0039] Figure 6-2 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.

[0040] Figure 6-3 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.

[0041] Figure 6-4 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.

[0042] Figure 6-5 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.

[0043] Figure 6-6 This is a schematic diagram of the clamping plate in a handheld structure for a handheld fan, provided as an embodiment of this application.

[0044] Figure 6-7This 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.

[0045] Figure 6-8 This is a schematic diagram of the space accommodating the handheld structure of a handheld fan, provided as an embodiment of this application.

[0046] Figure 6-9 This is a schematic diagram of the isolation plate in a handheld structure for a handheld fan, provided as an embodiment of this application.

[0047] Figure 6-10 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.

[0048] Figure 7-1 This is a schematic diagram of the structure of a handheld fan provided in an embodiment of this application.

[0049] Figure 7-2 This is a schematic diagram of the mounting bracket in a handheld fan, provided as an embodiment of this application.

[0050] Figure 7-3 This is a schematic diagram of the handheld housing of a handheld fan provided in an embodiment of this application.

[0051] Figure 7-4 This is a schematic diagram of the control mechanism in a handheld fan, provided as an embodiment of this application.

[0052] Figure 7-5 This is a schematic diagram of the mounting slot in a handheld fan provided in an embodiment of this application.

[0053] Figure 7-6 This is a schematic diagram of the outer casing of a handheld fan provided in an embodiment of this application.

[0054] Figure 7-7 This is a schematic diagram of the structure of the first circuit board in a handheld fan provided in an embodiment of this application.

[0055] Figure 7-8 This is a schematic diagram of the structure of the inner shell of a handheld fan provided in an embodiment of this application.

[0056] Figure 8-1 This is a schematic diagram of the air delivery device of a handheld fan provided in an embodiment of this application.

[0057] Figure 8-2 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.

[0058] Figure 8-3This is a schematic diagram of the handheld part of a handheld fan air delivery device provided in an embodiment of this application.

[0059] Figure 8-4 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.

[0060] Figure 8-5 A schematic diagram of the wire groove structure in the air delivery device of a handheld fan provided in this application embodiment.

[0061] Figure 8-6 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.

[0062] Figure 8-7 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.

[0063] Figure 8-8 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.

[0064] Figure 8-9 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.

[0065] Figure 8-10 for Figure 8-9 A magnified schematic diagram of the structure at point A in the middle.

[0066] Figure 8-11 This is a schematic diagram of the fan assembly in a handheld fan air delivery device provided in an embodiment of this application.

[0067] Figure 9-1 This is a schematic diagram of the air delivery mechanism of a handheld fan provided in an embodiment of this application.

[0068] Figure 9-2 This is a schematic diagram of the housing and support frame in the air delivery mechanism of a handheld fan provided in an embodiment of this application.

[0069] Figure 9-3 This is a schematic diagram of the limiting strip in the air delivery mechanism of a handheld fan provided in an embodiment of this application.

[0070] Figure 9-4 This is a schematic diagram of the air outlet structure in the air delivery mechanism of a handheld fan provided in an embodiment of this application.

[0071] Figure 9-5 This is a schematic diagram of the air inlet structure in the air delivery mechanism of a handheld fan provided in an embodiment of this application.

[0072] Figure 9-6 This is a schematic diagram of the sleeve and air inlet cover in the air delivery mechanism of a handheld fan provided in an embodiment of this application.

[0073] Figure 10-1 This is a schematic diagram of a handheld fan provided in an embodiment of this application.

[0074] Figure 10-2 An explosion diagram of a handheld fan provided as an embodiment of this application.

[0075] Figure 10-3 This is a schematic diagram of an air inlet shroud provided in an embodiment of this application.

[0076] Figure 10-4 This is a schematic diagram of an air duct formation provided in an embodiment of this application.

[0077] Figure 10-5 This is a schematic diagram of a fan blade provided in an embodiment of this application.

[0078] Figure 10-6 This is a bottom view of an air supply section provided in an embodiment of this application.

[0079] Figure 10-7 This is a schematic diagram of an integrally formed motor shaft and fan blade provided in an embodiment of this application.

[0080] Figure 10-8 This is a schematic diagram of a shock-absorbing spring provided in an embodiment of this application.

[0081] Figure 10-9 This is a connection diagram of a handheld part and an air supply part provided in an embodiment of this application.

[0082] Figure 11-1 A perspective view of a handheld fan provided in this application.

[0083] Figure 11-2 An exploded view of a handheld fan provided in this application.

[0084] Figure 11-3 A perspective view of the air inlet cover of a handheld fan provided in this application.

[0085] Figure 11-4 A cross-sectional view of a handheld fan along the AA section line provided in this application. Figure 11-5 A perspective view of the air delivery component of a handheld fan provided in this application in a certain direction.

[0086] Figure 11-6 A perspective view of the air delivery component of a handheld fan provided in this application from another direction.

[0087] Figure 12-1This is a perspective view of a handheld fan provided in this application.

[0088] Figure 12-2 A cross-sectional view of a handheld fan along the AA section line provided in this application. Figure 12-3 Another perspective view of a handheld fan provided in this application.

[0089] Figure 12-4 A perspective view of the air inlet cover of a handheld fan provided in this application.

[0090] Figure 12-5 A perspective view of the first sidewall of a handheld fan provided in this application.

[0091] Figure 13-1 This is a perspective view of a handheld fan provided in an embodiment of this application.

[0092] Figure 13-2 This is an exploded perspective view of a handheld fan provided in an embodiment of this application.

[0093] Figure 13-3 This is an exploded perspective view of the air delivery section of a handheld fan provided in an embodiment of this application.

[0094] Figure 13-4 This is a wiring diagram of a handheld fan provided in an embodiment of this application.

[0095] Figure 13-5 This is a perspective view of a handheld fan provided in an embodiment of this application from another angle.

[0096] Figure 13-6 This is a cross-sectional schematic diagram of a handheld fan provided in an embodiment of this application.

[0097] Figure 14-1 This is a schematic diagram of a handheld fan provided in an embodiment of this application.

[0098] Figure 14-2 An explosion diagram of a handheld fan provided as an embodiment of this application.

[0099] Figure 14-3 This is a schematic diagram of an air supply section provided in an embodiment of this application.

[0100] Figure 14-4 This is a cross-sectional view of a handheld fan provided in an embodiment of this application.

[0101] Figure 14-5 This is a schematic diagram of an air supply component provided in an embodiment of this application.

[0102] Figure 14-6 This is a schematic diagram of an impeller assembly provided in an embodiment of this application.

[0103] Figure 14-7 This is a connection diagram of a handheld part and an air supply part provided in an embodiment of this application.

[0104] Figure 15-1 This is a perspective view of a handheld fan provided in an embodiment of this application.

[0105] Figure 15-2 This is an exploded perspective view of a handheld fan provided in an embodiment of this application.

[0106] Figure 15-3 This is an exploded perspective view of the air delivery section of a handheld fan provided in an embodiment of this application.

[0107] Figure 15-4 This is a perspective view of a handheld fan provided in an embodiment of this application from another angle.

[0108] Figure 15-5 This is a wiring diagram of a handheld fan provided in an embodiment of this application.

[0109] Figure 15-6 This is a cross-sectional schematic diagram of a handheld fan provided in an embodiment of this application.

[0110] Figure 16-1 This is a schematic diagram of the motor drive control circuit module for a portable fan.

[0111] Figure 16-2 This is the schematic diagram of the voltage regulator unit circuit.

[0112] Figure 16-3 This is a schematic diagram of a motor drive control circuit.

[0113] Figure 16-4 This is a schematic diagram of the rotor position detection circuit.

[0114] Figure 16-5 This is the circuit diagram of the motor drive control unit.

[0115] Figure 16-6 This is the schematic diagram of the main control unit circuit.

[0116] Figure 16-7 This is a schematic diagram of the display unit circuit.

[0117] Figure 17-1 Diagram of a battery boost charging circuit module for a portable fan.

[0118] Figure 17-2 A boost module circuit for the battery charging circuit of a portable fan.

[0119] Figure 17-3 The portable fan's battery boost charging circuit includes a charging voltage preset module, an over-temperature protection module, and a charging status indicator module.

[0120] Figure 17-4 A battery boost charging circuit and USB interface circuit for a portable fan.

[0121] Figure 17-5 This is a signal transmission module for the battery boost charging circuit of a portable fan.

[0122] Figure 18-1 This is a circuit diagram of the charging management circuit for a portable fan.

[0123] Figure 18-2 This is a schematic diagram of the USB interface and fast charging management unit circuit.

[0124] Figure 18-3 This is the circuit schematic for the charging management unit.

[0125] Figure 19-1 Side view of a portable handheld fan.

[0126] Figure 19-2 This is a structural diagram of a portable handheld fan cooling component.

[0127] Figure 19-3 This is a structural diagram of a portable handheld fan spray assembly. Detailed Implementation

[0128] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0129] In the description of this application, the terms "front", "rear", "top", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0130] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The word "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more. Other quantifiers should be understood similarly. The preferred embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. Furthermore, the embodiments of this application and the features in the embodiments can be combined with each other without conflict.

[0131] It should be understood that while the terms “first,” “second,” etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or segment from another. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or portion discussed below may be referred to as the second element, component, region, layer, or portion. Spatially related terms, such as “below,” “above,” etc., may be used herein to facilitate the description of the relationship between one element or feature and another element or feature. It is understood that, in addition to the orientations shown in the figures, spatially related terms also include different orientations of the device in use or operation. For example, if the device in the figures is flipped, then an element or feature described as “below” will be oriented to be “above” other elements or features. Therefore, the exemplary term “below” may include both above and below orientations. The device may be oriented (rotated 90 degrees or in other orientations), and the spatially related descriptors used herein are interpreted accordingly. In this application, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element present.

[0132] In this embodiment, when a component is described as "fixed to" another component, it can be directly on the other component or an intermediate component may be present. When a component is considered to be "connected to" another component, it can be directly connected to the other component or an intermediate component may be present. When a component is considered to be "set on" another component, it can be directly set on the other component or an intermediate component may be present. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this embodiment are for illustrative purposes only and are not intended to limit this application.

[0133] Example 1, see Figures 1-1 to 1-6 As shown.

[0134] refer to Figure 1-1In 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] refer to Figure 1-4 The 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] refer to Figure 1-5 The 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.

[0146] 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.

[0147] Example 2, see Figures 2-1 to 2-6 As shown.

[0148] 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.

[0149] like Figure 2-1 and Figure 2-2As 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.

[0150] like Figures 2-2 to 2-4 As 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.

[0151] like Figure 2-1 and Figure 2-2As 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.

[0152] 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.

[0153] like Figures 2-1 to 2-4 As 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.

[0154] like Figure 2-1 and Figure 2-2As 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.

[0155] 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.

[0156] like Figures 2-1 to 2-4 As 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] Example 3-1, see Figures 3-1 to 3-5 As shown.

[0161] A portable fan includes an air delivery section 100; such as Figures 3-1 to 3-3 As 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.

[0162] 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 3-3As 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.

[0163] like Figures 3-2 to 3-5 As 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.

[0164] 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.

[0165] like Figure 3-5 As 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.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] The portable fan also includes a power supply, which is electrically connected to the display screen 3 and the drive motor 21.

[0170] Example 3-2, see Figure 3-6 and Figure 3-7 As shown.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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.

[0175] Example 4, see Figures 4-1 to 4-6 As shown.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] Example 5, see Figures 5-1 to 5-6 As shown.

[0193] Please see Figure 5-1 , Figure 5-3 and Figure 5-4 The handheld fan 100 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 100 is adjusted by scrolling the scroll wheel button 211, and the working state of the handheld fan 100 is adjusted by pressing the scroll wheel button 211.

[0194] In one feasible embodiment, please refer to Figure 5-1 , Figure 5-3 and Figure 5-4 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 rotary 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 airflow adjustment circuit, which is connected to the roller rotary encoder 214 to achieve stepless adjustment of the airflow of the handheld fan 100. The roller rotary 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 rotary encoder 214 outputs a digital signal, which is processed by the control circuit board to achieve stepless adjustment of the airflow of the handheld fan 100.

[0195] In one feasible embodiment, please refer to Figure 5-2 and Figure 5-4The 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. In another achievable embodiment, when the scroll wheel button 211 is pressed, the switch control circuit is turned on, and the handheld fan 100 starts working. At this time, scrolling the scroll wheel button 211 allows for stepless adjustment of the airflow of the handheld fan 100. When the airflow of the handheld fan 100 can be adjusted steplessly by scrolling the scroll wheel button 211, pressing the scroll wheel button 211 turns off the switch control circuit, and the handheld fan 100 stops working. Through the above methods, the safety of the handheld fan 100 can be improved, energy consumption reduced, and losses from accidental activation, deactivation, or misoperation can be minimized.

[0196] In one feasible embodiment, please refer to Figure 5-4 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.

[0197] In one feasible embodiment, please refer to Figure 5-1 and Figure 5-3 The handle 2 has a battery compartment 22 inside, which is used to store a rechargeable battery 221. The control circuit board is connected to the rechargeable battery 221. Optionally, the rechargeable battery 221 is a rechargeable battery, which further improves the convenience and portability of the handheld fan 100.

[0198] In one feasible embodiment, please refer to Figure 5-1 , Figure 5-4 and Figure 5-5 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.

[0199] Further, please see Figure 5-4 , Figure 5-5 and Figure 5-6The 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, thereby continuously controlling the speed of the handheld fan 100 based on these multiple different digital signals, thus improving the user experience.

[0200] In one feasible embodiment, please refer to Figure 5-1 , Figure 5-2 and Figure 5-4 The handheld fan 100 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 100. 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 100 starts working. At this time, the scroll wheel button 211 can be used to adjust the airflow of the handheld fan 100 at various speeds. By using both the anti-accidental touch button 215 and the scroll wheel button 211 for dual activation, the handheld fan 100 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 100.

[0201] In one feasible embodiment, please refer to Figure 5-1 , Figure 5-2 and Figure 5-4 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 100 from being accidentally started.

[0202] In one feasible embodiment, please refer to Figure 5-1 and Figure 5-4 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.

[0203] In one feasible embodiment, please refer to Figure 5-1 and Figure 5-2 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 on and take off the handheld fan 100 while improving the appearance of the handheld fan 100. Optionally, the lanyard hole 25 is located on the same side as the first opening 23.

[0204] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0205] The beneficial effects of this embodiment are as follows: By setting a control circuit board inside the handle of the handheld fan, the control circuit board is connected to a control unit, which is embedded in the handle. The control unit includes a scroll wheel button and a spring connected to the scroll wheel button. The airflow of the handheld fan is adjusted by scrolling the scroll wheel button, and the working state of the handheld fan is adjusted by pressing the scroll wheel button. In this way, the handheld fan of this application can be turned on and off by pressing the scroll wheel button, and the wind speed of the handheld fan can be adjusted steplessly by scrolling the scroll wheel button, thus freely adjusting the airflow of the handheld fan.

[0206] Example 6-1, see Figures 6-1 to 6-10 As shown.

[0207] Please see Figures 6-1 to 6-10 , Figure 6-1 This is a schematic diagram of a handheld structure for a handheld fan provided in an embodiment of this application. Figure 6-2 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 6-3 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 6-4 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 6-5 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 6-6 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 6-7 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 6-8 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 6-9 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 6-10 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:

[0208] For the handheld part 1 and the mounting bracket 2, which have a hollow cavity 11:

[0209] 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.

[0210] 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.

[0211] 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.

[0212] For the circuit board assembly, battery 4, and control mechanism:

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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.

[0217] Example 6-2

[0218] 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.

[0219] 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.

[0220] Example 7, see Figures 7-1 to 7-8 As shown.

[0221] 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.

[0222] Please see Figures 7-1 to 7-8 , Figure 7-1 This is a schematic diagram of the structure of a handheld fan provided in an embodiment of this application. Figure 7-2This is a schematic diagram of the structure of the mounting bracket 221 in a handheld fan provided in an embodiment of this application. Figure 7-3 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 7-4 This is a schematic diagram of the control mechanism in a handheld fan provided in an embodiment of this application. Figure 7-5 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 7-6 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 7-7 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 7-8 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:

[0223] For the air supply section 1 and the handheld section 2:

[0224] 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.

[0225] 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.

[0226] 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] Example 8-1, see Figures 8-1 to 8-11 As shown.

[0231] 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.

[0232] Please see Figures 8-1 to 8-11 , Figure 8-1 This is a schematic diagram of the air delivery device of a handheld fan provided in an embodiment of this application. Figure 8-2 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 8-3 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 8-4 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 8-5 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 8-6This 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 8-7 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 8-8 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 8-9 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 8-10 yes Figure 8-9 A magnified schematic diagram of the structure at point A in the middle. Figure 8-11 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:

[0233] For inner shell 1, fan assembly 3 and outer shell 2:

[0234] 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.

[0235] 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.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] Example 8-2, see Figures 8-1 to 8-11 As shown.

[0241] Embodiment 2 of this application provides a handheld fan, including the air delivery device of the handheld fan.

[0242] 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.

[0243] Example 9-1, see Figures 9-1 to 9-6 As shown.

[0244] This application discloses an air delivery mechanism for a handheld fan. An air passage 11 formed by an inner shell 1 connects to an air inlet 12 and an air outlet 13 on both sides, respectively. A fan assembly 3 is disposed within the air passage 11. An outer shell 2 covers the outside of the inner shell 1 and is slidably connected to the inner shell 1 along a first axial direction, from the air inlet 12 to the air outlet 13. During assembly, the outer shell 2 is pushed along the first axial direction to cover the outside of the inner shell 1, causing it to slide onto the inner shell. During maintenance, the outer shell 2 can be slidably separated from the inner shell 1, facilitating disassembly. This facilitates assembly and maintenance, improving assembly efficiency and ease of maintenance. Thus, it achieves the technical effects of high assembly efficiency and convenient maintenance.

[0245] Please see Figures 9-1 to 9-6 , Figure 9-1 This is a schematic diagram of the air delivery mechanism of a handheld fan provided in an embodiment of this application. Figure 9-2 This is a schematic diagram of the structure of the housing 16 and the support frame 17 in the air delivery mechanism of a handheld fan provided in an embodiment of this application. Figure 9-3 This is a schematic diagram of the limiting strip 21 in the air delivery mechanism of a handheld fan provided in an embodiment of this application. Figure 9-4 This is a schematic diagram of the air outlet 13 in the air delivery mechanism of a handheld fan provided in an embodiment of this application. Figure 9-5 This is a schematic diagram of the air inlet 12 in the air delivery mechanism of a handheld fan provided in an embodiment of this application. Figure 9-6This is a schematic diagram of the sleeve 22 and the air inlet cover 23 in the air delivery mechanism of a handheld fan provided in an embodiment of this application. The air delivery mechanism of a handheld fan 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 below:

[0246] For inner shell 1:

[0247] The inner shell 1 has an air passage 11, an air inlet 12 communicating with one side of the air passage 11, and an air outlet 13 communicating with the other side of the air passage 11. The inner shell 1 includes a shell 16 and a plurality of support frames 17 disposed on the shell 16. The support frames 17 are slidably connected to the outer shell 2 described below. The support frames 17 of the inner shell 1 may also be provided with limiting grooves 14 that match the limiting strips 21 described below. The shell 16 of the inner shell 1 is gradually widening in the direction from the air inlet 12 toward the air outlet 13. The plurality of support frames 17 are disposed at one end of the shell 16 near the air inlet 12, and the plurality of support frames 17 are evenly distributed.

[0248] Specifically, the inner shell 1 may include a shell 16 and multiple support frames 17 disposed on the shell 16. The shell 16 gradually expands from the air inlet 12 towards the air outlet 13, that is, the inner diameter of the shell 16 near the air inlet 12 is smaller than the inner diameter of the shell 16 near the air outlet 13. An air passage 11 formed inside the shell 16 within the inner shell 1 is used for gas flow. Gas enters the air passage 11 from the air inlet 12 and then exits from the air outlet 13. A limiting strip 21 is provided inside the sleeve 22 in the outer shell 2. A limiting groove 14 matching the limiting strip 21 is provided on the shell 16 within the inner shell 1. The limiting groove 14 is recessed into the surface of the shell 16 within the inner shell 1, facing towards the air passage 11. The internal space of the limiting groove 14 can accommodate the limiting strip 21, allowing the limiting strip 21 to be embedded in the limiting groove 14. The snap-fit ​​groove 15 can be set on the support frame 17 of the inner shell 1. The support frame 17 can provide support for the sleeve 22 of the outer shell 2. At the same time, the snap-fit ​​connector 24 set on the air inlet hood 23 of the outer shell 2 snaps into the snap-fit ​​groove 15, so that after the snap-fit ​​connector 24 of the air inlet hood 23 in the outer shell 2 snaps into the snap-fit ​​groove 15, the air inlet hood 23 in the outer shell 2 and the support frame 17 of the inner shell 1 are interconnected, which also facilitates the removal of the outer shell 2 from the inner shell 1.

[0249] For housing 2 and fan assembly 3:

[0250] The outer shell 2 covers the outer surface of the inner shell 1, and the outer shell 2 is slidably connected to the inner shell 1 along a first axial direction, which is the direction from the air inlet 12 to the air outlet 13. A limiting strip 21 matching the limiting groove 14 is provided on the outer shell 2. The limiting groove 14 extends along the first axial direction, and the limiting strip 21 is slidably disposed within the limiting groove 14. There are multiple limiting strips 21 and multiple limiting grooves 14, with each limiting strip 21 embedded in its corresponding limiting groove 14. The outer shell 2 includes a sleeve 22 and an air inlet hood 23. The sleeve 22 covers the inner shell 1, the limiting strip 21 is disposed on the sleeve 22, and the air inlet hood 23 is detachably connected to the inner shell 1 and connected to the sleeve 22. The inner shell 1 is provided with a snap-fit ​​groove 15, and the air inlet shroud 23 is provided with a snap-fit ​​connector 24 corresponding to the snap-fit ​​groove 15. The snap-fit ​​connector 24 and the snap-fit ​​groove 15 snap together. The snap-fit ​​connector 24 is located between the sleeve 22 and the inner shell 1, and the snap-fit ​​connectors 24 are distributed along the first axial direction. There are multiple snap-fit ​​connectors 24 and multiple snap-fit ​​grooves 15, and the multiple snap-fit ​​connectors 24 are arranged in a one-to-one correspondence, with equal spacing between them. The fan assembly 3 is disposed in the air passage 11.

[0251] Specifically, the outer shell 2 has a space to accommodate the inner shell 1. The outer shell 2 may include a sleeve 22 and an air inlet hood 23. A limiting strip 21 is provided on the inner wall of the sleeve 22 near the inner shell 1 in the outer shell 2. The limiting strip 21 is aligned with the limiting groove 14 provided on the inner shell 1. When the sleeve 22 is slidably inserted into the inner shell 1 from one end, the limiting strip 21 will be inserted from the opening of one end of the limiting groove 14 on the inner shell 1. At this time, the limiting strip 21 will slide from one end of the limiting groove 14 toward the other end of the limiting groove 14, causing the sleeve 22 in the outer shell 2 to move along the length extension direction of the upper limiting groove 14 on the inner shell 1.

[0252] It is worth mentioning that multiple limiting strips 21 can refer to 1 limiting strip 21, 2 limiting strips 21, 3 limiting strips 21, 4 limiting strips 21, etc., and multiple limiting grooves 14 can refer to 1 limiting groove 14, 2 limiting grooves 14, 3 limiting grooves 14, 4 limiting grooves 14, etc. When the number of limiting grooves 14 is 2 limiting grooves 14, the 2 limiting grooves 14 can be symmetrically distributed on both sides of the inner shell 1 and parallel to each other. In this way, the 2 limiting strips 21 located on the sleeve 22 in the outer shell 2 will slide along the corresponding limiting groove 14. After the sleeve 22 in the outer shell 2 is installed in the inner shell 1, the 2 limiting strips 21 embedded in the limiting grooves 14 will limit from both sides of the sleeve 22 in the outer shell 2, which helps to improve the firmness of the sleeve 22 in the outer shell 2 and facilitates the sliding installation of the sleeve 22 in the outer shell 2 on the inner shell 1. The fan assembly 3 may include a motor and fan blades driven by the motor. The motor can be installed inside the air passage 11 in the inner shell 1, and the housing 16 of the inner shell 1 provides support for the motor. After the motor shaft drives the fan blades to rotate, it drives the air to enter the air passage 11 from the air inlet 12, and the air entering the air passage 11 is then discharged from the air outlet 13. After the outer shell 2 is connected to the handheld part 4, it can also be easily gripped and carried by the operator.

[0253] This application provides an air delivery mechanism for a handheld fan. An air passage 11 formed by an inner shell 1 connects to an air inlet 12 and an air outlet 13 on both sides, respectively. A fan assembly 3 is disposed within the air passage 11. An outer shell 2 covers the outside of the inner shell 1 and is slidably connected to the inner shell 1 along a first axial direction, from the air inlet 12 to the air outlet 13. During assembly, the outer shell 2 is pushed along the first axial direction to cover the outside of the inner shell 1, causing it to slide onto the inner shell. During maintenance, the outer shell 2 can be slidably separated from the inner shell 1, facilitating disassembly. This facilitates assembly and maintenance, improving assembly efficiency and ease of maintenance. Thus, it achieves the technical effects of high assembly efficiency and convenient maintenance.

[0254] 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 mechanism of the handheld fan. Based on the same concept, this application also provides a handheld fan, as detailed in embodiment 2.

[0255] Example 9-2

[0256] Embodiment 2 of this application provides a handheld fan, including the air delivery mechanism of the handheld fan.

[0257] This application provides a handheld fan. An airflow channel 11 formed by an inner shell 1 connects to an air inlet 12 and an air outlet 13 on both sides, respectively. A fan assembly 3 is disposed within the airflow channel 11. An outer shell 2 covers the outside of the inner shell 1 and is slidably connected to the inner shell 1 along a first axial direction, from the air inlet 12 to the air outlet 13. During assembly, the outer shell 2 is pushed along the first axial direction to cover the outside of the inner shell 1, allowing it to slide onto the inner shell. During maintenance, the outer shell 2 can be slidably separated from the inner shell 1, facilitating disassembly. This facilitates assembly and maintenance, improving assembly efficiency and ease of maintenance. Thus, it achieves the technical effects of high assembly efficiency and convenient maintenance.

[0258] Example 10, see Figures 10-1 to 10-9 As shown.

[0259] Please refer to the following: Figures 10-1 to 10-9 As shown, this application provides a handheld fan to address the problem of vibration and noise caused by the oscillation of the fan blades when the motor is rotating at high speed during use. Please refer to [reference needed]. Figure 10-1 This is a schematic diagram of a handheld fan provided in an embodiment of this application, including an air delivery unit 10 and a handheld unit 20. Please refer to... Figure 10-2 This is an exploded view of a handheld fan provided in an embodiment of this application. The air supply unit 10 includes a housing 11, an air inlet cover 12 detachably connected to the housing 11, and a motor 13 disposed in the housing 11. A motor shaft 131 rotatable relative to the motor 13 is provided in the shaft hole of the motor 13. A fan blade 15 is connected to the top of the motor shaft 131. A shock-absorbing spring 132 is provided between the motor 13 and the fan blade 15. The shock-absorbing spring 132 is sleeved on the motor shaft 131.

[0260] For further details, please refer to Figure 10-3 This is a schematic diagram of an air inlet shroud provided in an embodiment of this application. The air inlet shroud 12 includes an air inlet plate 121, a first side wall 122 connected to the air inlet plate 121 and wrapped around a preset axis, and a second side wall 123 wrapped around the periphery of the first side wall 122. Please refer to... Figure 10-4 This is a schematic diagram of a duct formation provided in an embodiment of this application. A duct 16 is formed between the first sidewall 122 and the second sidewall 123. The minimum inner diameter of the second sidewall 123 is greater than the maximum outer diameter of the first sidewall 122. This not only ensures the duct width between the second sidewall 123 and the first sidewall 122, thereby ensuring the air outlet area, but also reduces the wind resistance of the second sidewall 123 and appropriately guides the airflow in the duct, thereby achieving higher air outlet efficiency and making the air outlet smoother.

[0261] Specifically, in this embodiment of the application, when the user uses the handheld fan, the fan blades 15 rotate under the drive of the motor 13, guiding the air from the air inlet shroud 12 to the space between the first side wall 122 and the second side wall 123 and blowing it out from the air outlet side. The user can hold the handheld fan to direct the air towards the part that needs to be cooled, thereby achieving rapid cooling and improving human comfort.

[0262] For further details, please refer to Figure 10-5 This is a schematic diagram of a fan blade provided in an embodiment of this application. The fan blade 15 includes a conical cavity 151 and blades 152 disposed outside the conical cavity 151. The blades 152 are oblique flow shaped, and an oblique flow duct 153 is formed between two adjacent blades 152. The oblique flow duct 153 is used to guide the air from the air inlet shroud 12 to the space of the duct 16 formed between the first side wall 122 and the second side wall 123. This can reduce the impact of the wind on the inner wall of the shroud, reduce wind loss, and improve the air outlet efficiency. In this embodiment of the application, the blades 152 of the handheld fan are preferably oblique flow shaped, which can make the handheld fan have a larger air volume, lower noise, and a more compact structure, making it easy to hold and carry.

[0263] For further details, please refer to... Figure 10-6 The image shows a lower view of an air supply section provided in an embodiment of this application. The motor 13 is fitted with a motor bearing 14, which is located inside the conical cavity 151. The motor bearing 14 ensures the stability of the motor 13 when it rotates at high speed, thereby ensuring the overall operational stability of the handheld fan.

[0264] For further details, please refer to... Figure 10-7 This is a schematic diagram of an integrally formed motor shaft and fan blade provided in an embodiment of this application. In this embodiment, the motor shaft 131 and the fan blade 15 are integrally formed, and a metal ring 17 is fixed between the motor shaft 131 and the fan blade 15. The metal ring 17 passes through the motor shaft 131 to fix the motor shaft 131 and the fan blade 15. The integrally formed structure of the fan blade 15 and the motor shaft 131 effectively reduces the space occupied by the air supply part 10.

[0265] For further details, please refer to... Figure 10-8 This is a schematic diagram of a shock-absorbing spring provided in an embodiment of this application. In this embodiment, the shock-absorbing spring 132 is detachably connected to the motor shaft 131, which makes it convenient to replace the shock-absorbing spring 132 after it is damaged. In addition, since the required shock absorption strength is different at different positions, the inner diameter of the shock-absorbing spring 132 and the spacing between adjacent turns are different.

[0266] Specifically, the inner diameter 1321 of the damping spring 132 at the end away from the motor 13 is larger than the inner diameter 1322 of the damping spring 132 at the end close to the motor 13, and the spacing 1323 between adjacent turns at the end of the damping spring 132 away from the motor 13 is smaller than the spacing 1324 between adjacent turns at the end of the damping spring 132 close to the motor 13.

[0267] For further details, please refer to... Figure 10-9 , Figure 10-9 This application provides a connection diagram of an air supply unit and a handheld part. The air supply unit 10 is provided with a first connector 18, and the handheld part 20 is provided with a second connector 21. The air supply unit 10 and the handheld part 20 are connected by a fixing member 22. The fixing member 22 passes through the first connector 18 and the second connector 21 to connect the air supply unit 10 and the handheld part 20. For example, the fixing member 22 can be a screw or other fixing member 22 used to connect the air supply unit 10 and the handheld part 20. Here, this application does not make further limitations.

[0268] This application provides a handheld fan, comprising an air delivery unit and a handheld unit. The air delivery unit includes a housing, an air inlet shroud detachably connected to the housing, and a motor housed within the housing. A motor shaft, rotatable relative to the motor, is located within the motor's shaft hole. Fan blades are connected to the top of the motor shaft. A shock-absorbing spring is provided between the motor and the fan blades, and the shock-absorbing spring is sleeved on the motor shaft. The handheld fan provided by this application can reduce the vibration and noise generated by the oscillation of the fan blades during high-speed motor rotation through the shock-absorbing spring, thereby increasing the overall comfort of the user and providing a better user experience.

[0269] Example 11, see Figures 11-1 to 11-6 As shown.

[0270] like Figure 11-1 As shown in the figure, a handheld fan provided in this application embodiment includes an air supply part 100, a handheld part 200 and an air supply assembly 300, wherein the handheld part 200 is connected to the air supply part 100.

[0271] like Figure 11-2 An exploded view of a handheld fan provided in this embodiment shows that the air supply unit 100 includes an air inlet shroud 110.

[0272] like Figure 11-3The perspective view of the air inlet cover 110 of a handheld fan provided in this embodiment shows that the air inlet cover 110 has an air inlet cover body 112 and an air guide portion 111 connected to the air inlet cover body 112 and extending toward the air delivery assembly 300. The air delivery portion 100 is provided with a first receiving cavity 120.

[0273] Figure 11-4 This is a cross-sectional view of the handheld fan in this embodiment along section line AA. Figure 11-5 This is a perspective view of the air delivery assembly 300 of the handheld fan provided in this embodiment in a certain direction. The air delivery assembly 300 is disposed in the first receiving cavity 120. The first receiving cavity 120 includes an air guide cone 320 and a fan blade 310 disposed on the air guide cone 320. There is a first gap between the air guide cone 320 and the air guide portion 111.

[0274] Specifically, the air inlet shroud body 112 can be any component that can cooperate with the air guide section 111 to guide air. For example, the air inlet shroud body 112 can be an air guiding component, such as an air guide plate or air guide hole; the air inlet shroud body 112 can also be a base structure for supporting the air guide section 111 of the air inlet shroud 110, thereby improving the overall structural stability of the air inlet shroud 110. Therefore, the structure of the air inlet shroud body 112 is not specifically limited here, and those skilled in the art can set the structure of the air inlet shroud body 112 according to specific needs in specific applications.

[0275] Specifically, the air supply assembly 300 can be a fan module, and the air guide cone 320 can be rotated by a motor, so that the fan blades 310 set on the air guide cone 320 can also rotate with the air guide cone 320, thereby allowing the gas that enters the first receiving cavity 120 through the air inlet shroud 110 to be sent out of the air supply section 100 with the rotation of the fan blades 310.

[0276] It is understandable that the shape of the air guide cone 320 can be a cone or a cone with part of the top cut off. For example, the air guide cone 320 can be a side wall that is arranged around a certain axis, and the inner diameter of the side wall gradually decreases or increases from one end to the other.

[0277] Specifically, the fan blade 310 can be an oblique flow blade, which allows the gas to flow along the surface of the guide cone 320 and the air duct between adjacent fan blades 310.

[0278] Specifically, the handheld part 200 can be any structural component used for holding the fan; no specific limitation is made here.

[0279] Thus, when there is no gap between the air supply assembly 300 and the air guide portion 111 of the air inlet shroud 110 extending towards the air supply assembly 300, the airflow entering through the air inlet shroud 110 will form turbulence, causing the flowing air to interfere with each other and generating significant noise. Therefore, by providing a gap between the air guide cone 320 with fan blades 310 and the air guide portion 111, this application can reduce the turbulence generated by the airflow entering through the air inlet shroud 110, thereby reducing the interference between the flowing air and lowering the noise generated by the interference of flowing air.

[0280] In one alternative implementation, such as Figure 11-4 As shown, the distance of the first gap is greater than 1 mm and less than 14 mm.

[0281] Understandably, by setting a gap between the air guide cone 320 and the air guide section 111, the turbulence between them can be effectively reduced. However, if the gap between the air guide cone 320 and the air guide section 111 is designed to be too large, the air duct distance will be too long, thus increasing the air delivery time from the air inlet shroud 110 to the air outlet, resulting in lower fan efficiency. Therefore, designing the gap between the air guide cone 320 and the air guide section 111 between 1 mm and 14 mm allows for effective reduction of turbulence while maintaining a certain fan efficiency, thereby reducing fan noise.

[0282] In one alternative implementation, such as Figure 11-4 and Figure 11-5 As shown, the fan blade 310 is located between the end faces of the two ends of the guide cone 320.

[0283] It is understandable that the fan blade 310 is located between the end faces of the two ends of the air guide cone 320. This can prevent the fan blade 310 from extending beyond the end faces of the two ends of the air guide cone 320, which would cause an obstruction between the air guide cone 320 and the air guide section 111, thereby causing turbulence between the air guide cone 320 and the air guide section 111 and increasing the noise generated by the fan.

[0284] In one alternative implementation, such as Figure 11-3 As shown, the air guide 111 is a column, one end of the air guide 111 is located in the first receiving cavity 120, and the air guide cone 320 near the air inlet shroud 110 and the air guide 111 near the air guide cone 320 have the first gap.

[0285] Specifically, in this implementation, the air guide 111 can be a cylinder, a triangular prism, a cube, or a cuboid. The air guide 111 can be designed in different shapes to allow the air entering the first receiving cavity 120 to flow along the surface of the air guide 111, thereby guiding the air entering the first receiving cavity 120. Therefore, in specific applications, those skilled in the art can design the specific shape of the air guide 111 according to specific needs.

[0286] It is understandable that the length of the air guide 111 extending into the first receiving cavity 120 can be determined by the specific distance value of the first gap. The larger the distance value of the first gap, the shorter the length of the air guide 111 extending into the first receiving cavity 120. The smaller the distance value of the first gap, the shorter the length of the air guide 111 extending into the first receiving cavity 120.

[0287] In one alternative implementation, such as Figure 11-2 and Figure 11-4 As shown, the end face of the air guide cone 320 near the air inlet shroud 110 is circular, and the diameter of the end face of the air guide cone 320 near the air inlet shroud 110 is smaller than the diameter of the circumcircle of the end face of the air guide portion 111.

[0288] Understandably, designing the end face of the air guide cone 320 near the air inlet shroud 110 as circular can effectively enhance the stability of the air guide cone 320 structure compared to having the end of the air guide cone 320 near the air inlet shroud 110 as the vertex.

[0289] Understandably, the end face of the air guide 111 can be square, triangular, or circular; no specific limitation is made here.

[0290] Optionally, the axis of the guide cone 320 can coincide with the axis of the guide section 111. In this way, when the diameter of the circumscribed circle of the end face of the guide section 111 is larger than the diameter of the end face of the guide cone 320 near the air inlet shroud 110, the air along the surface of the guide section 111 will not be blocked by the end face of the guide cone 320 near the air inlet shroud 110 during the flow of air through the air duct formed by the guide cone 320 and the fan blade 310. This allows the air guided by the guide section 111 to be introduced into the air duct to improve the fan's air output efficiency.

[0291] In one alternative implementation, such as Figure 11-6 A perspective view of a handheld fan air delivery assembly 300 from another angle is provided. The air delivery assembly 300 also includes a rotating shaft 330 disposed in the inner cavity of the air guide cone 320. The rotating shaft 330 is used to drive the air guide cone 320 to rotate around a preset axis, which is the air delivery direction of the air delivery part 100.

[0292] Specifically, the air guide cone 320 can be configured as a hollow structure to form an inner cavity. Setting the rotating shaft 330 inside the inner cavity of the air guide cone 320 can effectively utilize the space and also avoid the formation of turbulence when the rotating shaft 330 is designed on the outside of the air guide cone 320.

[0293] In one alternative implementation, such as Figure 11-4 and Figure 11-6 As shown, the air supply assembly 300 also includes several support plates 340, which are connected between the inner wall of the air guide cone 320 and the rotating shaft 330.

[0294] It is understandable that installing a support plate 340 between the inner wall of the air guide cone 320 and the rotating shaft 330 can make the connection between the air guide cone 320 and the rotating shaft 330 more stable and secure.

[0295] Alternatively, to increase the stability of the connection between the air guide cone 320 and the rotating shaft 330, several support plates 340 can be arranged around the periphery of the rotating shaft 330. Furthermore, the support plates 340 can be evenly arranged around the periphery of the rotating shaft 330 to further increase the stability of the connection between the air guide cone 320 and the rotating shaft 330.

[0296] In one alternative implementation, such as Figure 11-4 and Figure 11-6 As shown, the air supply assembly 300 also includes a sleeve 350 sleeved around the rotating shaft 330, and the support plate 340 is connected to the rotating shaft 330 through the sleeve 350.

[0297] Optionally, one end of the sleeve 350 can be connected to the end of the air guide cone 320 connected to the rotating shaft 330. Since the rotating shaft 330 needs to drive the air guide cone 320 to rotate, by connecting the sleeve 350 between the support plate 340 and the rotating shaft 330, the support plate 340 can be damped, thereby ensuring the stability of the connection between the support plate 340 and the air guide cone 320.

[0298] In one alternative implementation, such as Figure 11-4 and Figure 11-6 As shown, the rotating shaft 330, the sleeve 350 and the air guide cone 320 are integrally formed.

[0299] Understandably, the sleeve 350 and the rotating shaft 330 are integrally formed, which can ensure the stability of the connection between the sleeve 350 and the rotating shaft 330.

[0300] Specifically, the first end of the air guide cone 320 near the air inlet shroud 110 can be closed, and one end of the rotating shaft 330 can be integrally formed with the first end of the air guide cone 320, thereby increasing the stability of the connection between the air guide cone 320 and the rotating shaft 330.

[0301] In one alternative implementation, such as Figure 11-2 and Figure 11-4 As shown, the diameter of the circumscribed circle of the end face of the air guide 111 is greater than 5 mm and less than 12 mm;

[0302] The end face of the air guide cone 320 near the air inlet shroud 110 is circular, and the diameter of the end face of the air guide cone 320 near the air inlet shroud 110 is greater than 1 mm and less than 7 mm.

[0303] Understandably, by setting the diameter of the circumcircle of the end face of the air guide 111 to be larger and the diameter of the end face of the air guide cone 320 near the air inlet shroud 110 to be smaller, the air along the surface of the air guide 111 will not be blocked or will be blocked less by the end face of the air guide cone 320 near the air inlet shroud 110 during the flow of air through the air duct formed by the air guide cone 320 and the fan blade 310. This allows as much air guided by the air guide 111 as possible to be introduced into the air duct to improve the fan's air output efficiency.

[0304] Furthermore, by designing a larger diameter for the outer circle of the end face of the air guide 111, the stability of the air inlet shroud 112 can be enhanced when the air guide 111 serves as a support structure for the air inlet shroud 112. On the other hand, by setting a smaller diameter for the end face of the air guide cone 320 near the air inlet shroud 110, the volume of the air guide cone 320 can be reduced, thereby allowing the air guide cone 320 to occupy less space in the first receiving cavity 120. This results in a larger volume of the air duct formed within the air supply section 100, allowing more air to be delivered through the air supply section 100, thereby improving the fan's air output efficiency.

[0305] Alternatively, the diameter of the circumscribed circle of the end face of the air guide 111 can be 8 mm, and the diameter of the end face of the air guide cone 320 near the air inlet shroud 110 can be 4 mm. This allows the diameter of the circumscribed circle of the end face of the air guide 111 to be larger than the diameter of the end face of the air guide cone 320 near the air inlet shroud 110. This ensures that the airflow along the surface of the air guide 111 is not blocked by the end face of the air guide cone 320 near the air inlet shroud 110 as it flows through the air duct formed by the air guide cone 320 and the fan blade 310. This allows the airflow guided by the air guide 111 to be introduced into the air duct, thereby improving the fan's airflow efficiency.

[0306] In one alternative implementation, such as Figure 11-4 As shown, the air supply assembly 300 also includes a collar 360 sleeved around the rotating shaft 330, and the collar 360 is sleeved between the rotating shaft 330 and the sleeve 350.

[0307] Understandably, the collar 360 fitted between the rotating shaft 330 and the sleeve 350 can make the fit between the rotating shaft 330 and the sleeve 350 more secure, prevent slippage, and increase the strength of the rotating shaft 330.

[0308] In one alternative implementation, such as Figure 11-4 As shown, the collar 360 and the rotating shaft 330 are integrally formed.

[0309] Understandably, the integral molding of the collar 360 and the rotating shaft 330 can increase the stability of the fit between the collar 360 and the rotating shaft 330, and can also further increase the strength of the rotating shaft 330.

[0310] Example 12, see Figures 12-1 to 12-5 As shown.

[0311] like Figure 12-1 A 3D image of a handheld fan is provided. Figure 12-3 A stereoscopic view of a handheld fan from another angle is provided. Figure 12-2 A cross-sectional view of a handheld fan along section line AA is provided. The handheld fan includes: an air inlet cover 100, an air outlet cover 200, a first housing 300, a handheld part 400, and a fan module 500. The air inlet cover 100 includes a plurality of air guide plates 110 that are connected to each other and arranged radially around a preset axis. The preset axis is the axial direction from the air inlet cover 100 to the air outlet cover 200. There is an air inlet gap between two adjacent air guide plates 110. Each air guide plate 110 also protrudes toward the side away from the air outlet cover 200.

[0312] The first housing 300 is connected between the air inlet hood 100 and the air outlet hood 200, and together with the air inlet hood 100 and the air outlet hood 200, forms a first receiving cavity;

[0313] One end of the handheld part 400 is connected to the first housing 300;

[0314] The fan module 500 is located inside the first receiving cavity.

[0315] Specifically, the air inlet hood 100 and the air outlet hood 200 can be arranged relative to each other so that the air supply efficiency of the formed air supply path is high enough.

[0316] Specifically, the connection of multiple air guide plates 110 can be achieved by connecting the first ends of the multiple air guide plates 110 respectively and connecting the second ends of the multiple air guide plates 110 respectively.

[0317] Specifically, the hand-held part 400 can be any structure used for holding, and there is no specific limitation here.

[0318] Specifically, the fan module 500 can be any type of fan, such as an axial flow fan, a centrifugal fan, or a mixed flow fan; there are no specific limitations here.

[0319] It is understood that the connection method here can be integral molding or connection through connectors; there is no specific limitation here.

[0320] In this way, the air guide plate 110 of the air inlet shroud 100 protrudes towards the side away from the air outlet shroud 200, and the air guide plates 110 are connected and arranged radially around a preset axis, so that the overall shape of the air inlet shroud 100 is a shape that protrudes towards the side away from the air outlet shroud 200. Compared with the shape of the air outlet shroud 200 being flat or the air outlet shroud being recessed towards the side away from the air outlet shroud 200, this can effectively increase the air intake volume of the air inlet shroud 100. Therefore, when the fan module 500 in the first receiving cavity is working, more air can be introduced into the first receiving cavity through the air inlet shroud 100 and sent to the air outlet shroud 200 for blowing out, thereby increasing the air intake efficiency of the air inlet shroud 100 and the air outlet efficiency of the air outlet shroud 200, thereby improving the cooling efficiency of the handheld fan.

[0321] In one alternative implementation, such as Figure 12-4 A perspective view of an air inlet cover 100 for a handheld fan is provided. The air inlet cover 100 further includes a first base 120 and a ring 130 surrounding the first base 120 around the predetermined axis. The first base 120 is closed at one end away from the air outlet cover 200 and open at the other end.

[0322] Specifically, multiple air guide plates 110 can be connected between the first base 120 and the ring 130. On the one hand, connecting the first base 120 and the ring 130 to the two ends of the air guide plate 110 can ensure the stability of the connection between the air guide plates 110. On the other hand, since the air guide plate 110 is arranged in a ring around the first base 120, the connection between the air guide plate 110 and the first base 120 can ensure the stability of the overall structure of the air inlet cover 100.

[0323] It is understandable that closing the first end of the first base 120 away from the air outlet hood 200 can prevent air from entering the inner cavity of the first base 120, thereby preventing the first base 120 from being impacted by excessively fast wind speed on the side of the air inlet hood 100 when the fan module 500 is working, and thus preventing the structural instability of the air inlet hood 100 caused by the impact on the first base 120.

[0324] In one alternative implementation, such as Figure 12-4 As shown, the first substrate 120 is a hollow cylinder.

[0325] Understandably, designing the first substrate 120 as a hollow structure can effectively reduce the weight of the handheld fan, thereby increasing its portability. In addition, designing the first substrate 120 as a hollow structure can save on the materials used in the first substrate 120, thereby reducing the manufacturing cost of the handheld fan.

[0326] Understandably, since the air guide plate 110 is arranged in a ring between the first base 120 and the ring 130, compared to designing the first base 120 as a cylinder, it can keep the shape and length of each air guide plate 110 the same, thereby ensuring that the air guiding space formed between any two air guide plates 110 is the same. This ensures that the air distribution is more uniform when the air inlet hood 100 is inlet, and further ensures that the air distribution delivered from the air outlet hood 200 is also more uniform, avoiding the poor user experience caused by uneven air delivery from the side of the air outlet hood 200.

[0327] In one alternative implementation, such as Figure 12-4 As shown, the end face of the first end of the first base 120 is concave inward compared to the end face of the ring 130 that is farther away from the air outlet hood 200.

[0328] It should be noted that the inward concavity of the first end of the first substrate 120 in this implementation means that the end face of the first end of the first substrate 120 protrudes in the direction close to the air outlet hood 200.

[0329] It is understandable that the end face of the first end of the first base 120 is concave inward compared to the end face of the ring 130 that is away from the air outlet hood 200, and the air guide plate 110 is connected between the first base 120 and the ring 130 and protrudes towards the side away from the air outlet hood 200. This makes the protrusion of the air inlet hood 100 towards the side away from the air outlet hood 200 greater, thereby making the air inlet area of ​​the air inlet hood 100 larger. Thus, without changing the volume of the handheld fan, the air inlet area of ​​the air inlet hood 100 can be increased, thereby increasing the air intake efficiency of the handheld fan and improving the cooling efficiency of the handheld fan.

[0330] In one alternative implementation, such as Figure 12-4 As shown, the inner diameter of the ring 130 is larger than the outer diameter of the first base 120, and the inner diameter of the ring 130 gradually decreases towards the air outlet direction.

[0331] It is understandable that the inner diameter of the ring 130 is larger than the outer diameter of the first base 120, so that an air intake channel can be formed between the ring 130 and the first base 120, and the incoming air can enter the first receiving cavity through the air intake channel; and the inner diameter of the ring 130 gradually decreases towards the air outlet direction, so that the air entering the air intake shroud 100 is compressed, thereby increasing the air pressure on the side of the air intake shroud 100, thereby increasing the air velocity on the side of the air intake shroud 100 and improving the air intake efficiency of the handheld fan.

[0332] In one alternative implementation, such as Figure 12-4 As shown, a plurality of the air guide plates 110 are evenly arranged around the periphery of the first base 120 and connected between the ring 130 and the first end of the first base 120.

[0333] Understandably, the fact that multiple air guide plates 110 are evenly arranged around the periphery of the first base 120 can make the gap between any two adjacent air guide plates 110 equal; the fact that multiple air guide plates 110 are evenly arranged around the periphery of the first base 120 can make the air intake of the air inlet cover 100 more uniform, thereby making the air intake process of the air inlet cover 100 more stable, and avoiding the uneven air output when the handheld fan is blowing air, which would lead to a poor user experience.

[0334] By connecting multiple air guide plates 110 between the ring 130 and the first end of the first base 120, a portion of the first base 120 can be prevented from being located outside the first receiving cavity, thereby avoiding increasing the size of the handheld fan and making it easier to carry.

[0335] In one alternative implementation, such as Figure 12-4 As shown, the width of the air guide plate 110 gradually decreases along the extension direction of the outer periphery of the air inlet shroud 100 toward the center of the air inlet shroud 100.

[0336] It is understandable that the air guide plate 110 has a certain width, which makes the structure of the air guide plate 110 more stable when guiding air. The width of the air guide plate 110 gradually decreases along the outer periphery of the air inlet cover 100 towards the center of the air inlet cover 100, which can further save the material of the air guide plate 110 while ensuring the structural stability of the air guide plate 110, thereby saving the manufacturing cost of the handheld fan.

[0337] In one alternative implementation, such as Figure 12-4 As shown, the first base 120, the ring 130, and the plurality of air guide plates 110 are integrally formed.

[0338] Understandably, the first base 120, the ring 130, and the multiple air guide plates 110 are integrally formed, which can ensure the stability of the air inlet cover 100 structure and prevent the air inlet cover 100 from becoming unstable when subjected to the impact of incoming air, thereby affecting the air intake efficiency of the handheld fan.

[0339] In one alternative implementation, such as Figure 12-5 A perspective view of the first sidewall 310 of a handheld fan is provided. Figure 12-1 and Figure 12-4 As shown, the first housing 300 includes a first sidewall 310, which is circumferentially disposed around the air inlet shroud 100 around the preset axis.

[0340] The inner edge of the air inlet shroud 100 is provided with a plurality of first buckles 140;

[0341] The first sidewall 310 is provided with a first through hole 311 that matches the first buckle 140 at one end near the air inlet shroud 100. The first through hole 311 opens on the side away from the first sidewall 310.

[0342] The first buckle 140 includes an insertion portion, the second end of which is bent to form a chamfer, and the second end is located away from the air inlet shroud 100.

[0343] The first sidewall 310 and the air inlet cover 100 are connected by inserting the insertion part into the first through hole 311 along the air inlet direction and by fastening the chamfer to the inner wall of the first sidewall 310.

[0344] It is understandable that the inner side of the air inlet shroud 100 and the inner side of the first sidewall 310 are respectively the sides closest to the first receiving cavity.

[0345] Optionally, such as Figure 12-4 and Figure 12-5 As shown, the first sidewall 310 may have a chamfered surface 313 at one end edge near the air inlet hood 100. The chamfered surface 313 extends toward the center of the air inlet hood 100. The first sidewall 310 is connected to the air inlet hood 100 through the chamfered surface 313 of the first sidewall 310. The connection between the first sidewall 310 and the air inlet hood 100 can be realized. Specifically, in this implementation, the first through hole 311 can be set on the chamfered surface 313 of the first sidewall 310, and the first buckle 140 set on the inner edge of the air inlet cover 100 can be set on the inner side of the ring 130 of the air inlet cover 100. By inserting the first buckle 140 into the first through hole 311 and making the chamfer of the first buckle 140 engage with the inner wall of the chamfered surface 313 of the first sidewall 310, the air inlet cover 100 can be engaged with the first sidewall 310 from the inside of the first receiving cavity. This avoids the problem that the connection structure between the air inlet cover 100 and the first sidewall 310 is easily damaged when the air inlet cover 100 and the first sidewall 310 are engaged from the outside, which would prevent the integrity of the air inlet cover 100 and the first sidewall 310 from being compromised.

[0346] In one alternative implementation, such as Figure 12-4 and Figure 12-5 As shown, the inner edge of the air inlet shroud 100 is also provided with a number of first inserts 150;

[0347] The inner side of the first sidewall 310 near the air inlet shroud 100 is provided with a second through hole 312 that matches the first plug-in 150;

[0348] The air inlet shroud 100 is connected to the first side wall 310 by inserting the first plug 150 into the second through hole 312 and fixing it in the second through hole 312.

[0349] It is understandable that the inner side of the air inlet shroud 100 and the inner side of the first sidewall 310 are respectively the sides closest to the first receiving cavity.

[0350] Optionally, such as Figure 12-4 and Figure 12-5 As shown, the first sidewall 310 may have a chamfered surface 313 at one end edge near the air inlet shroud 100. This chamfered surface 313 extends toward the center of the air inlet shroud 100. The connection between the first sidewall 310 and the air inlet shroud 100 can be achieved through the chamfered surface 313 of the first sidewall 310. Specifically, in this implementation, the second through hole 312 may be provided on the chamfered surface 313 of the first sidewall 310, and the first insert provided on the inner edge of the air inlet shroud 100 may be provided on the inner wall of the annulus 130 of the air inlet shroud 100. By inserting the first insert 150 into the second through hole 312, the air inlet shroud 100 is connected to the first sidewall 310 from the inside of the first receiving cavity. This avoids the problem that the connection structure between the air inlet shroud 100 and the first sidewall 310 is easily damaged when they are connected from the outside, thus preventing the problem of the air inlet shroud 100 and the first sidewall 310 not being able to guarantee their integrity.

[0351] Example 13, see Figures 13-1 to 13-6 As shown.

[0352] Please refer to Figures 13-1 to 13-6 This application provides a handheld fan to address the issues of how to facilitate disassembly and installation, make maintenance convenient, and extend the service life of the handheld fan.

[0353] Specifically, please refer to Figure 13-1 This is a perspective view of a handheld fan provided in an embodiment of this application. The handheld fan includes an air delivery section 10 and a handheld section 20. Please refer to the following: Figures 13-2 to 13-3The air supply unit 10 includes a first inner shell 101, a second inner shell 102 that is fastened to the first inner shell 101, and an outer shell 103. The first inner shell 101 has a protruding structure 1010 evenly provided on the side facing the second inner shell 102, and the second inner shell 102 has a recessed structure 1020 corresponding to the protruding structure. The protruding structure 1010 and the recessed structure 1020 are fastened to each other. The outer shell 103 covers the first inner shell 101 and the second inner shell 102 to house the first inner shell 101 and the second inner shell 102. By uniformly providing protruding structures 1010 on the outer wall edge of the first inner shell 101 facing the second inner shell 102, and providing recessed structures 1020 on the outer wall of the second inner shell 102 facing the first inner shell 101 corresponding to the protruding structures 1010, the protruding structures 1010 and the recessed structures 1020 can be tightly fastened together. This ensures that the first inner shell 101 and the second inner shell 102 can be tightly fastened together while also guaranteeing convenient installation and disassembly between the first inner shell 101 and the second inner shell 102. Furthermore, the installation method of fastening the first inner shell 101 and the second inner shell 102 by providing the protruding structures 1010 and the recessed structures 102 facilitates disassembly and installation during later maintenance, making maintenance convenient.

[0354] Furthermore, a fan base 111 is provided inside the second inner shell 102, and a fan impeller 112 is provided on the side of the fan base 111 facing the first inner shell 101. The fan impeller 112 has a conical cavity, and a bearing 113 is provided inside the conical cavity. A motor rotating shaft 114 is inserted into the bearing 113, and the motor rotating shaft 114 is connected to the motor 115. The bearing 113 is arranged around the outside of the motor rotating shaft 114. When the motor rotating shaft 114 rotates, the bearing 113 can effectively reduce the axial displacement caused by the rotation of the motor rotating shaft 114. The arrangement of the bearing 113 ensures the rotational stability of the motor rotating shaft 114, thereby ensuring the overall operational stability of the handheld fan.

[0355] Specifically, a receiving cavity 123 is provided on the rear side of the fan base 111. An air outlet 121 is provided between the outer side of the receiving cavity 123 and the inner side of the first inner shell 101. A connecting plate 1230 is provided at intervals on the outer wall of the receiving cavity 123, and the connecting plate 1230 is connected to the inner wall of the second inner shell 102. The provision of the connecting plate 1230 enhances the stability between the second inner shell 102 and the receiving cavity 123, thereby improving the stability of the fan base 111 when the handheld fan is running.

[0356] Furthermore, such as Figure 13-4As shown, a first circuit board 116 is mounted on the rear side of the fan base 111, and a second circuit board 204 is disposed inside the handle. A first wiring channel 117 is radially provided on the fan base 111, which accommodates wires from the first circuit board 116 to the second circuit board 204. Wires extend from the first circuit board 116 to the second circuit board 204. The handle 20 is equipped with the second circuit board 204 for convenient wiring. The first wiring channel 117 ensures that the wires are not easily bent when connected to the circuit board, extending their service life. The wires bypass the outside of the fan impeller 112 and connect to the second circuit board 204, preventing the wires from touching the fan impeller 112, being scratched, causing short circuits, and poor contact. During assembly, the middle wires can be placed in the first wiring channel 117, effectively utilizing space. Due to internal space limitations, space is reserved to prevent the wires from being crushed during assembly.

[0357] Specifically, such as Figure 13-5 As shown, the handheld part 20 is provided with a first connecting member 203, and the air supply part 10 is provided with a second connecting member 105. The air supply part 10 and the handheld part 20 are connected by a fixing member 131. The fixing member 131 passes through the first connecting member 203 and the second connecting member 105, connecting the air supply part 10 and the handheld part 20. A portion of the handheld part 20 is embedded in the air supply part 10. By partially embedding the handheld part 20 into the air supply part 10, and by providing the first connecting member 203 and the second connecting member 105 to be fixedly connected by the fixing member 131, the overall stability and sturdiness of the handheld fan during use are ensured. For example, the fixing member 131 can be a screw or other fixing member 131 used to connect the air supply part 10 and the handheld part 20. Here, this application embodiment does not make further limitations.

[0358] Furthermore, such as Figure 13-6 As shown, the outer walls of the first inner shell 101 and the second inner shell 102 are provided with a plurality of connecting grooves along the axial direction, and the inner wall of the outer shell 103 is provided with connecting protrusions 1031 corresponding to the connecting grooves. The connecting grooves and the connecting protrusions 1031 cooperate with each other to guide the first inner shell 101 and the second inner shell 102 to the outer shell 103, while preventing relative rotation between the outer shell 103 and the first inner shell 101 and the second inner shell 102, thereby enhancing the connection stability between the first inner shell 101, the second inner shell 102 and the outer shell 103.

[0359] Specifically, the air supply unit 10 further includes an air inlet shroud 104 covering the second inner shell 102. The air inlet shroud 104 has an outwardly facing annular protrusion, the height of which is higher than the center of the air inlet shroud 104. There is a gap between the air inlet shroud 104 and the fan impeller 112. By setting a gap between the air inlet shroud 104 and the fan impeller 112, the air guiding effect is improved. In this embodiment, the air inlet shroud 104 is formed by the gap between connecting strips arranged in a radiating pattern along the central axial edge region. The connecting strips are arc-shaped, and the opening direction of the arc-shaped structure faces the fan impeller 112. By setting the air inlet shroud composed of the arc-shaped connecting strips, the resistance received during air intake can be effectively reduced, thereby improving the air intake effect of the air inlet shroud and enhancing the user experience. In other embodiments, the air inlet shroud 104 has several circular, square, or other shaped holes.

[0360] Furthermore, a display screen 122 is installed inside the receiving cavity 123, and the air outlet 121 is arranged around the outside of the display screen 122. In use, the display screen 122 is used to display the remaining power, current wind speed, and battery power.

[0361] Specifically, the first inner shell 101 has a trapezoidal structure, and trapezoidal cavities are arranged annularly on the inclined surface of the outer side of the first inner shell 101. By setting the trapezoidal cavities, the vibration on the outer shell 103 is reduced when the motor 115 drives the fan impeller 112 to rotate, thereby improving the user experience.

[0362] Furthermore, the handheld unit 20 also includes a bracket 201 and a battery 202 disposed within the bracket 201. The battery 202 is electrically connected to the motor 115 and the display screen 122. In use, the battery 202 can supply power to the motor 115 to rotate the fan impeller 112, and can also supply power to the display screen to display the remaining power, current wind speed, and battery level.

[0363] Example 14, see Figures 14-1 to 14-7 As shown.

[0364] Please refer to the following: Figures 14-1 to 14-7 As shown, to address the problem that vibrations caused by the impeller's rotation during handheld fan use, and the resulting noise transmitted to the casing, this application provides a handheld fan embodiment. Please refer to... Figure 14-1 This is a schematic diagram of a handheld fan provided in an embodiment of this application. The handheld fan includes an air delivery unit 10 and a handheld unit 20. Please refer to... Figure 14-2This is an exploded view of a handheld fan provided in an embodiment of this application. The air supply unit 10 includes a detachable and assembleable outer shell 11 and an inner shell 12. The outer shell 11 has a first storage cavity 111 suitable for accommodating the inner shell 12, and the inner shell 12 has a second storage cavity 121 suitable for installing the air supply assembly 30. A shock-absorbing structure 40 is provided between the outer shell 11 and the inner shell 12.

[0365] Specifically, the outer shell 11 and the inner shell 12 are detachably assembled. The inner shell 12 is located in the first storage cavity 111 inside the outer shell 11, and the air supply assembly 30 is located in the second storage cavity 121 of the inner shell 12. When the handheld fan is used, the rotation of the air supply assembly 30 will cause the inner shell 11 to vibrate. The shock absorption structure 40 provided between the outer shell 11 and the inner shell 12 can effectively reduce the vibration of the air supply assembly 30 transmitted from the inner shell 12 to the outer shell 11 when it rotates, thereby reducing the noise generated by the handheld fan when in use.

[0366] Furthermore, the shock-absorbing structure 40 is snapped onto the inner side of the outer shell 11, and the shock-absorbing structure 40 is arranged along the periphery 122 of the inner shell 12. In this embodiment, the outer shell 11 and the inner shell 12 are detachably connected, and the shock-absorbing structure 40 is snapped onto the inner side of the outer shell 11. The shock-absorbing structure 40 and the inner side of the outer shell 11 can abut against each other, thereby offsetting the vibration generated in the inner shell 11. Moreover, the shock-absorbing structure 40 is snapped onto the inner side of the outer shell 11, making disassembly relatively simple and facilitating timely cleaning of components such as the outer shell 11, the inner shell 12, and the air inlet hood 50.

[0367] Furthermore, the shock-absorbing structure 40 is integrally formed with the inner shell 12, which can not only effectively reduce the vibration transmitted from the inner shell 12 to the outer shell 11 when the air supply component 30 rotates, but also make the structure of the handheld fan simpler and more compact by integrally forming the shock-absorbing structure 40 with the inner shell 12, simplifying the overall assembly process of the handheld fan and effectively improving the production efficiency of the handheld fan.

[0368] For further details, please refer to... Figure 14-3 This is a schematic diagram of an air supply section provided in an embodiment of this application. The shock absorption structure 40 consists of at least two trapezoidal protrusions, which are equally spaced apart. The number of trapezoidal protrusions is at least two, and is specifically set according to the diameters of the outer shell 11 and the inner shell 12. Here, this embodiment of the application does not impose further limitations.

[0369] Specifically, in this embodiment, the shock-absorbing structure 40 is configured as a trapezoidal protrusion, with the wider side of the cross-section facing the outer shell 11 and the narrower side facing the inner shell 12. The trapezoidal protrusion can abut against the inner side of the outer shell 11, thereby effectively buffering the vibration transmitted from the inner shell 12 to the outer shell 11 when the air supply assembly 30 rotates, thus achieving a shock-absorbing effect.

[0370] Furthermore, the trapezoidal protrusion is hollow, and the end of the trapezoidal protrusion that engages with the outer shell 11 has a through hole 41 for ventilation. In this embodiment, the hollow design of the trapezoidal protrusion reduces its weight, making the handheld fan lighter. It also allows for some elastic deformation space when the outer shell 11 and the inner shell 12 rotate relative to each other, enhancing the stability of the connection between them. In this embodiment, the through hole 41 at the end of the trapezoidal protrusion that engages with the outer shell 11 prevents the protrusion from blocking the through hole 41 while providing shock absorption.

[0371] For further details, please refer to... Figure 14-4 This is a cross-sectional view of a handheld fan provided in an embodiment of this application. The air supply part 10 further includes an air inlet cover 50 that is snapped onto the inner housing 12. The air inlet cover 50 includes an air inlet plate 501 and a fixing ring 502 snapped onto the periphery of the air inlet plate 501. An air duct is formed between the air inlet plate 501 and the air supply assembly 30 within the second storage cavity 121.

[0372] Specifically, the air supply component 30 is located in the second storage cavity 121. When the air supply component is working, it can guide the air from the air inlet plate 501 out of the second storage cavity 121 to form an air duct, making the air output of the handheld fan more uniform and improving the air output efficiency of the handheld fan.

[0373] For further details, please refer to... Figure 14-5 This is a schematic diagram of an air supply assembly provided in an embodiment of this application. The air supply assembly 30 includes a drive motor 31 and an impeller assembly 32. The impeller assembly 32 includes a conical cavity 321 and blades 322 surrounding the outside of the conical cavity 321. A motor bearing 311 is provided inside the conical cavity 321. The motor bearing 311 is sleeved on the outside of the drive motor 31. The setting of the motor bearing 311 ensures the stability of the drive motor 31 when it rotates at high speed, thereby ensuring the overall operational stability of the handheld fan.

[0374] Specifically, in this embodiment of the application, when the user uses the handheld fan, the blades 322 rotate under the drive of the drive motor 31, guiding the air from the air inlet shroud 50 into the air duct space in the second storage cavity 121 and blowing it out from the air outlet side. The user can hold the handheld fan to direct the air towards the part that needs to be cooled, thereby achieving rapid cooling and improving human comfort.

[0375] Furthermore, the maximum outer diameter of the impeller assembly 32 is smaller than the maximum outer diameter of the air inlet shroud 50. This arrangement allows most of the impeller assembly 32 to be covered, which is not only more aesthetically pleasing but also prevents fingers or hair from being pinched, thus improving the user experience. The maximum outer diameter of the outer casing 11 is equal to the maximum outer diameter of the air inlet shroud 50, ensuring that the dimensions of the air inlet shroud 50 and the outer casing 11 are matched and that they are installed securely.

[0376] For further details, please refer to... Figure 14-6 This is a schematic diagram of an impeller assembly provided in an embodiment of this application. The blades 322 are oblique flow type, and an oblique flow duct 323 is formed between two adjacent blades 322. The oblique flow duct 323 is used to guide the air from the air inlet shroud 50 into the duct space. The blades 322 of the handheld fan are preferably oblique flow type, which can make the handheld fan have a larger air volume, lower noise, more compact structure, and easy to hold and carry.

[0377] Further, please refer to Figure 14-7 , Figure 14-7 This application provides a connection diagram of an air supply unit and a handheld unit. The handheld unit 20 is provided with a first connector 21, and the air supply unit 10 is provided with a second connector 13. The handheld unit 20 and the air supply unit 10 are connected by a fixing member 22. The fixing member 22 passes through the first connector 21 and the second connector 13 to fix the handheld unit 20 and the air supply unit 10. For example, the fixing member 22 can be a screw or other fixing member 22 used to connect the air supply unit 10 and the handheld unit 20. Here, this application does not make further limitations.

[0378] This application provides a handheld fan, comprising an air delivery unit and a handheld unit. The air delivery unit includes a detachable outer shell and an inner shell. The outer shell has a first receiving cavity suitable for accommodating the inner shell, and the inner shell has a second receiving cavity suitable for installing an air delivery assembly. A shock-absorbing structure is provided between the outer shell and the inner shell. The handheld fan provided by this application, by adding a shock-absorbing structure between the outer shell and the inner shell, effectively reduces the noise generated by impeller vibration transmitted to the outer shell during use, thereby increasing the overall comfort of the user and providing a better user experience.

[0379] Example 15, see Figures 15-1 to 15-6 As shown.

[0380] Please refer to Figures 15-1 to 15-6 This application provides a handheld fan to solve the problem of how to achieve good airflow and high cooling efficiency while keeping the handheld fan small in size.

[0381] Specifically, please refer to Figure 15-1 This is a perspective view of a handheld fan provided in an embodiment of this application. The handheld fan includes an air delivery section 10 and a handheld section 20. Please refer to the following: Figures 15-2 to 15-3 The air supply unit 10 includes a first inner shell 101 and a second inner shell 102 that is fastened to the first inner shell 101; the first inner shell 101 is close to the air inlet side, the second inner shell 102 is close to the air outlet side, a fan base 111 is provided inside the second inner shell 102, and a fan impeller 112 is provided on the side of the fan base 111 facing the first inner shell 101. The fan impeller 112 is inside the first inner shell 101, and the end of the first inner shell 101 near the air inlet side protrudes beyond the end of the fan impeller 112 near the air inlet side. By placing the fan impeller 112 inside the first inner shell 101 and having the end of the first inner shell 101 near the air inlet protrude beyond the end of the fan impeller 112 near the air inlet, an air inlet channel is created between the fan impeller 112 and the air inlet side, improving the air guiding effect. Furthermore, the placement of the fan impeller 112 inside the first inner shell 101 allows airflow to enter from the air inlet side and flow along the fan impeller 112, converging and flowing out from the air outlet side, thereby enhancing the air outlet effect of the handheld fan.

[0382] Furthermore, the first inner shell 101 has a trapezoidal structure, and trapezoidal cavities 1011 are arranged annularly on the outer inclined surface of the first inner shell 101. The first inner shell 101 has protruding structures 1010 spaced apart on the side facing the second inner shell 102, and the second inner shell 102 has recessed structures 1020 corresponding to the protruding structures. By providing the trapezoidal cavities 1011, the overall vibration of the air delivery section 10 is reduced when the fan impeller 112 rotates, improving the user experience. By uniformly providing protruding structures 1010 on the outer wall edge of the first inner shell 101 facing the second inner shell 102, and providing recessed structures 1020 on the outer wall of the second inner shell 102 facing the first inner shell 101 corresponding to the protruding structures 1010, the protruding structures 1010 and the recessed structures 1020 can be tightly fastened together. This ensures that the first inner shell 101 and the second inner shell 102 can be tightly fastened together while also guaranteeing convenient installation and disassembly between the first inner shell 101 and the second inner shell 102. Furthermore, the installation method of fastening the first inner shell 101 and the second inner shell 102 by providing the protruding structures 1010 and the recessed structures 102 facilitates disassembly and installation during later maintenance, making maintenance convenient.

[0383] Specifically, the air supply unit 10 further includes an outer shell 103 sleeved on the first inner shell (101) and the second inner shell 102. The outer walls of the first inner shell 101 and the second inner shell 102 are axially provided with a plurality of connecting grooves, and the inner wall of the outer shell 103 is provided with connecting protrusions corresponding to the connecting grooves. The connecting grooves and the connecting protrusions cooperate to guide the connection between the first inner shell 101 and the second inner shell 102 and the outer shell 103, while preventing relative rotation between the outer shell 103 and the first inner shell 101 and the second inner shell 102, thus enhancing the connection stability between the first inner shell 101, the second inner shell 102, and the outer shell 103.

[0384] Furthermore, the fan impeller 112 is provided with a conical cavity, and a bearing 113 is disposed within the conical cavity. A motor rotating shaft 114 is inserted into the bearing 113, and the motor rotating shaft 114 is connected to the motor 115. The bearing 113 is arranged around the outside of the motor rotating shaft 114. When the motor rotating shaft 114 rotates, the bearing 113 can effectively reduce the axial displacement caused by the rotation of the motor rotating shaft 114. The arrangement of the bearing 113 ensures the rotational stability of the motor rotating shaft 114, thereby ensuring the overall operational stability of the handheld fan.

[0385] Specifically, the air supply unit 10 further includes an air inlet shroud 104 covering the second inner shell 102. The air inlet shroud 104 has an outwardly facing annular protrusion, the height of which is higher than the center of the air inlet shroud 104. There is a gap between the air inlet shroud 104 and the fan impeller 112. By setting a gap between the air inlet shroud 104 and the fan impeller 112, the air guiding effect is improved. In this embodiment, the air inlet shroud 104 is formed by the gap between connecting strips arranged in a radiating pattern along the central axial edge region. The connecting strips are arc-shaped, and the opening direction of the arc-shaped structure faces the fan impeller 112. By setting the air inlet shroud composed of the arc-shaped connecting strips, the resistance received during air intake can be effectively reduced, thereby improving the air intake effect of the air inlet shroud and enhancing the user experience. In other embodiments, the air inlet shroud 104 has several circular, square, or other shaped holes.

[0386] Furthermore, an air outlet 121 is provided on the outer side of the first inner shell 101, and a receiving cavity 123 is provided on the rear side of the fan base 111. A display screen 122 is installed in the receiving cavity, and the air outlet 121 is arranged around the outer side of the display screen 122. The display screen 122 is used to display the gear and the battery level.

[0387] Specifically, connecting plates 1230 are spaced apart on the outer wall of the receiving cavity 123, and the connecting plates 1230 are connected to the inner wall of the second inner shell 102. The connection plates 1230 between the outer wall of the receiving cavity 123 and the inner wall of the second inner shell 102 enhance the stability between the second inner shell 102 and the receiving cavity 123, reduce the vibration caused by the motor 115 connected to the fan base 111 during operation, ensure the stability between the receiving cavity 123 and the second inner shell 102, and thus improve the stability of the fan base 111 when the handheld fan is running.

[0388] Furthermore, such as Figure 15-4 As shown, the handheld part 20 is provided with a first connecting member 203, and the air supply part 10 is provided with a second connecting member 105. The air supply part 10 and the handheld part 20 are connected by a fixing member 131. The fixing member 131 passes through the first connecting member 203 and the second connecting member 105, connecting the air supply part 10 and the handheld part 20. A portion of the handheld part 20 is embedded in the air supply part 10. By partially embedding the handheld part 20 into the air supply part 10, and by providing the first connecting member 203 and the second connecting member 105 to be fixedly connected by the fixing member 131, the overall stability and sturdiness of the handheld fan during use are ensured. For example, the fixing member 131 can be a screw or other fixing member 131 used to connect the air supply part 10 and the handheld part 20. Here, this application embodiment does not make further limitations.

[0389] Specifically, such as Figure 15-5 As shown, a first circuit board 116 is mounted on the rear side of the fan base 111. A first wiring channel 117 is radially provided on the fan base 111. Wires are led out from the first circuit board 116 to a second circuit board 204. The second circuit board 204 is located inside the handle. The handle 20 is equipped with the second circuit board 204 for convenient wiring. The first wiring channel 117 ensures that the wires are not easily bent when connecting the first circuit board 116 and the second circuit board 204, extending their service life. The wires bypass the outside of the fan impeller 112 and connect to the second circuit board 204 to prevent the wires from touching the fan impeller 112, being scratched, causing short circuits, and poor contact. During assembly, the wires in the middle can be placed in the first wiring channel 117, effectively utilizing space. Due to the limited internal space, space is reserved to prevent the wires from being crushed during assembly.

[0390] Furthermore, such as Figure 15-6 As shown, the handheld unit 20 also includes a bracket 201 and a battery 202 disposed within the bracket 201. The battery 202 is electrically connected to the motor 115 and the display screen 122. In use, the battery 202 can power the motor 115 to rotate the fan impeller 112, and can also power the display screen to display the remaining power, current wind speed, and battery level.

[0391] Example 16, see Figures 16-1 to 16-7 As shown.

[0392] As per the instruction manual Figure 16-1 As shown:

[0393] A motor drive control circuit for a portable fan includes: a battery power supply, a voltage regulator unit 100, a main control unit 200, a motor drive control unit 300, a motor drive circuit 400, a motor 500, a rotor position detection circuit 600, a USB access circuit 700, an ADC (Analog-to-Digital Converter) power supply circuit 800, and a display unit 900.

[0394] Portable fans include: handheld fans, neck fans, wearable fans, waist fans, headband fans, desktop fans, car fans, etc.

[0395] As per the instruction manual Figure 16-2 As shown:

[0396] The voltage regulator unit 100 includes a voltage regulator chip U1. The power supply voltage VBAT is connected to the IN input pin of the voltage regulator chip U1 through a current-limiting resistor R1. One end of the filter capacitor C1 is connected to the IN input pin 1 of the voltage regulator chip U1, and the other end is grounded. The OUT output pin of the voltage regulator chip U1 outputs the VDD working voltage to power the main control chip U2 and the motor drive chip U3. The OUT output pin of the voltage regulator chip U1 is grounded through a capacitor C2 to filter the current. The GND pin of the voltage regulator chip U1 is grounded.

[0397] The voltage regulator unit 100 is used to stabilize the power supply voltage and ensure a constant output voltage under different load conditions. It can automatically adjust the current according to changes in the power supply voltage to maintain a constant output voltage. The voltage regulator unit 100 is used to stabilize voltage sources with large variations to prevent the influence of external environmental factors (such as temperature, humidity, etc.) on the circuit.

[0398] As per the instruction manual Figure 16-3 As shown:

[0399] In one embodiment, the motor drive control unit 300, the motor drive circuit 400, and the rotor position detection circuit 600 work together to drive the operation of the motor 500.

[0400] The permanent magnet is set on the rotor of the motor 500, and the three windings U2, V2 and W2 are set on the stator of the motor 500 in a Y-type connection.

[0401] The motor drive control unit 300 outputs a control signal, and the motor drive circuit 400 controls the magnitude, direction, and phase relationship of the current flowing through the U2, V2, and W2 windings of the motor 500 according to the control signal.

[0402] The motor drive circuit 400 includes capacitors C3, C4, and C5 connected in parallel, with one end connected to the power supply voltage VBAT and the other end grounded, in order to filter current and stabilize voltage.

[0403] In one embodiment, the motor drive circuit 400 further includes: one end of MOSFET switch Q1 is connected to the power supply voltage VBAT, and the other end is connected to the winding U2; the conduction of MOSFET switch Q1 is controlled by MOSFET switch Q4; one end of MOSFET switch Q4 is connected to the power supply voltage VBAT through a voltage divider and current limiting resistor R5, and the other end is grounded; the motor drive control unit 300 outputs a PWM_AH signal to the drain of MOSFET switch Q4 to control the conduction of MOSFET switch Q4; one end of MOSFET switch Q7 is connected to the winding U2, and the other end is grounded through a resistor R11; the motor drive control unit 300 outputs a PWM_AL signal to the drain of MOSFET switch Q7 to control the conduction of MOSFET switch Q7. MOSFET switches Q1, Q4, and Q7 are equipped with reverse diodes; before overvoltage damages the MOSFETs, the diodes are reverse-biased and broken down to prevent the MOSFETs from burning out.

[0404] Optionally, MOSFET switch Q1 is a P-type MOSFET, and MOSFET switches Q4 and Q7 are N-type MOSFETs. Resistor R2 is connected to the drain and source of MOSFET switch Q4, and resistor R8 is connected to the drain and source of MOSFET switch Q7. This provides bias voltage for the MOSFETs and discharges static electricity between the gate and source of the MOSFETs, thereby protecting the MOSFETs.

[0405] The current control principle of winding U2 is as follows:

[0406] Current flows into winding U2: The motor drive control unit 300 outputs a low-level PWM_AL signal to the drain of MOSFET switch Q7, and MOSFET switch Q7 is in the off state; the motor drive control unit 300 outputs a low-level PWM_AH signal to the drain of MOSFET switch Q4, and MOSFET switch Q4 is turned on. The power supply voltage VBAT is grounded through the voltage divider and current limiting resistor R5, and the drain of MOSFET switch Q1 is grounded and input a low level. MOSFET switch Q1 is turned on, and current flows into winding U2.

[0407] Current flows out of winding U2: The motor drive control unit 300 outputs a low-level PWM_AH signal to the drain of MOSFET switch Q4, MOSFET switch Q4 is in the off state, the drain of MOSFET switch Q1 is connected to a high level, MOSFET switch Q1 is turned off; The motor drive control unit 300 outputs a low-level PWM_AL signal to the drain of MOSFET switch Q7, MOSFET switch Q7 is turned on, and current flows out of winding U2.

[0408] In one embodiment, the MOSFET switching circuit consisting of MOSFET switches Q2, Q5, Q8 and resistors R6, R3, R9 controls the inflow and outflow of current in winding V2. Its circuit structure and control principle are similar to those of the current control circuit for winding U2. The MOSFET switching circuit consisting of MOSFET switches Q3, Q6, Q9 and resistors R7, R4, R10 controls the inflow and outflow of current in winding W2. Its circuit structure and control principle are similar to those of the current control circuit for winding U2.

[0409] In one embodiment, the motor overcurrent protection circuit includes: a current sampling resistor R11 for monitoring the current flowing out of the motor 500; the voltage of resistor R11 is output to the ISENSE_IN overcurrent protection detection pin of the motor drive control unit 300 through the current limiting resistor R12; the motor drive control unit 300 converts the input voltage signal into a corresponding digital signal to obtain the quantized current value of the motor 500; one end of capacitor C6 is connected to the ISENSE_IN overcurrent protection detection pin of the motor drive control unit 300, and the other end is grounded to filter the current and stabilize the voltage; when the current value of the motor 500 exceeds the maximum operating current, the motor drive control unit 300 adjusts the control signal output to the motor drive circuit 400 to reduce the current flowing through the windings U2, V2, and W2 of the motor 500.

[0410] As per the instruction manual Figure 16-4 As shown:

[0411] In one embodiment, in the rotor position detection circuit 600, one end of resistor R13 is connected to the BEMF_COM pin of the motor drive control unit 300, and the other end is grounded through resistor R19; winding U2 is connected to the BEMF_U pin of the motor drive control unit 300 through resistor R14, and the other end of resistor R14 is grounded through resistor R19.

[0412] The BEMF back electromotive force output circuit composed of resistors R15, R16, and R20 outputs the BEMF back electromotive force voltage signal of winding V2. Its circuit structure and control principle are similar to those of the BEMF back electromotive force output circuit of winding U2. The BEMF back electromotive force output circuit composed of resistors R17, R18, and R21 outputs the BEMF back electromotive force voltage signal of winding W2. Its circuit structure and control principle are similar to those of the BEMF back electromotive force output circuit of winding U2.

[0413] The motor drive control unit 300 monitors the line voltages of windings U2, V2, and W2 through signals input from the BEMF_U, BEMF_V, and BEMF_W pins, and calculates the back electromotive force of the motor 500 rotor, thereby calculating the position of the motor 500 rotor.

[0414] The drive control principle of motor 500 is as follows:

[0415] The main control unit 200 outputs a motor start signal to the input terminal of the motor drive control unit 300, and the motor drive control unit 300 outputs a motor drive signal to the gate of the MOS transistor in the motor drive circuit 400. The motor drive control unit 300 obtains the current position of the rotor of the motor 500 through the back electromotive force, controls the phase relationship of each phase output, and energizes the corresponding two phase windings each time. The energizing time of each phase winding is 120 electrical degrees, so that the stator flux linkage and the direction of the reverse flux linkage are at a certain angle to the direction of the rotor flux linkage, thereby driving the rotor of the motor 500 to rotate.

[0416] As per the instruction manual Figure 16-5 As shown:

[0417] In one embodiment, the motor drive control unit 300 includes a motor drive chip U3. The VDD power supply pin 12 of the motor drive chip U3 is connected to the VDD operating voltage, and capacitor C7 is connected to the VDD power supply pin 12 of the motor drive chip U3 to filter current and stabilize voltage. The GND pin 5 of the motor drive chip U3 is grounded. The PWM pin 11 of the motor drive chip U3 receives the motor running pulse modulation signal PWM. Pins 1-3 and 14-16 of the motor drive chip U3 output motor drive signals to the gate of the MOS transistor in the motor drive circuit 400. Pins 6-8 of the motor drive chip U3 receive back electromotive force signals BEMF_U, BEMF_V, and BEMF_W. The FG pin 13 of the motor drive chip U3 outputs the motor speed information. The ISENSE_IN pin 9 of the motor drive chip U3 receives an overcurrent protection signal.

[0418] As per the instruction manual Figures 16-6 to 16-7 As shown:

[0419] In one embodiment, the USB access circuit 700 includes: the USB voltage VBUS outputting a USBDET signal through a current-limiting resistor R22; the positive terminal of diode D2 is grounded, and the negative terminal is connected to the USB voltage VBUS through resistor R22 to achieve overvoltage protection for the main control unit.

[0420] In one embodiment, the battery voltage detection analog-to-digital converter circuit 800 includes: the battery voltage VBAT is grounded through resistors R23 and R24, and capacitor C8 is connected in parallel with resistor R24; one end of resistor R24 ​​outputs an analog-to-digital converter voltage signal V_ADC.

[0421] In one embodiment, the motor drive control circuit of the portable fan is provided with an adapter interface P2. The adapter interface P2 transmits the P_EN enable signal of the DIP switch, the gear adjustment signal KEY, KEY_X, and KEY_Y to the main control unit 200 of the portable fan. The VDD power supply supplies power to the mode switching roller through the current limiting resistors R25 and R26.

[0422] In one embodiment, the display unit 900 includes an SMG switch interface and a digital display screen. The SMG switch adapter pins 1-5 are connected to the main control unit 200 through current-limiting resistors R25-R29. The SMG switch adapter pins 1-5 have received display control signals and transmitted them to the digital display screen. The digital display screen displays the portable fan blowing temperature and fan power percentage according to the display control signals.

[0423] In one embodiment, the main control unit 200 includes a control chip U4. The VDD power supply pin 1 of the control chip U4 is connected to the VDD operating voltage, and the VDD power supply pin 1 of the control chip U4 is grounded through the voltage regulator capacitor C9. The VSS pin 16 of the control chip U4 is grounded. Pins 4, 6, and 7 of the control chip U4 receive gear adjustment signals KEY, KEY_X, and KEY_Y and send fan operation status commands. Pin 5 of the control chip U4 outputs a motor operation pulse modulation signal PWM to the motor driver chip U3. Pin 8 of the control chip U4 receives a USBDET signal to determine the power supply status. Pin 9 of the control chip U4 receives an analog-to-digital conversion voltage signal V_ADC. Pins 2 and 12-15 of the control chip U4 are connected to the display unit 900 to output display control signals.

[0424] Example 17, see Figures 17-1 to 17-5 As shown.

[0425] As per the instruction manual Figure 17-1 As shown:

[0426] A battery boost charging circuit for a portable fan includes: a USB interface, a boost module, a boost charging management module, a charging voltage preset module, a charging status indicator module, and an over-temperature protection module.

[0427] Portable fans include: handheld fans, neck fans, waist fans, headband fans, desktop fans, car fans, etc.

[0428] The USB interface includes interface J1, and the boost charging management module includes charging chip U1.

[0429] As per the instruction manual Figure 17-2 As shown:

[0430] In one embodiment, the boost charging management module has the following features: the charging chip U1 integrates a power MOSFET and a boost synchronous boost circuit.

[0431] The boost module circuit includes: one end of inductor L1 is connected to the USB voltage VBUS, and the other end is connected to the LX external inductor pin 8 of the charging chip U1; the BST bootstrap capacitor pin 7 of the charging chip U1 is connected to pin 8 through bootstrap capacitor C2, which increases the DC bias voltage in the amplifier circuit and enhances the amplitude of the output signal; the LX external inductor pin 8 of the charging chip U1 is grounded through resistor R1 and capacitor C1, which form an RC circuit to filter high-frequency signals; one end of current-limiting resistor R2 is connected to the USB voltage VBUS, and the other end is connected to the VIN power supply input pin 6 of the charging chip U1 to introduce the input voltage, which is grounded through capacitor C4 to filter the current; one end of voltage-regulating capacitor C5 is connected to the USB voltage VBUS, and the other end is grounded. The boost charging circuit uses the boost module to charge the BAT battery.

[0432] The portable fan's battery boost charging circuit includes a voltage regulator and filter circuit: the boost output VOUT of the charging chip U1 is pin 2, which outputs the charging voltage to charge the BAT battery; the filter capacitors C3 and C6 are connected in parallel, one end connected to the VBAT voltage and the other end grounded; the boost module NC (normally closed) includes a diode D1, with the positive terminal of diode D1 grounded and the negative terminal connected to VBAT.

[0433] Capacitors C7, C8, and C9 are connected in parallel, with one end connected to pin 1 of the VSYS boost output intermediate node of the charging chip U1, and the other end grounded. A voltage regulator and filter circuit filters the current and stabilizes the voltage at the charging output.

[0434] Pin 0 of the charging chip U1 is grounded.

[0435] The working principle of the boost module is as follows:

[0436] When the MOSFET connected to inductor L1 inside the charging chip U1 is turned on, inductor L1 is grounded. As the current in inductor L1 increases, inductor L1 begins to store energy. When the MOSFET connected to inductor L1 inside the charging chip U1 is turned off, inductor L1 releases the stored energy. At this time, inductor L1 and USB voltage VBUS are connected in series and superimposed to achieve a boost effect, charging the BAT battery through the Boost synchronous boost circuit. The MOSFET of the charging chip U1 is controlled by its internal logic. When the charging chip U1 is not working, the MOSFET turns off the chip output to prevent leakage risk.

[0437] As per the instruction manual Figure 17-3 As shown:

[0438] In one embodiment, the charging voltage preset module has the following features: a setting resistor R3, one end of which is connected to the VSET voltage setting pin 4 of the charging chip U1, and the other end is grounded. The charging chip U1 determines the output charging voltage based on the detected electrical signal of R4. The battery boost charging circuit sets the charging voltage through the charging voltage preset module.

[0439] In one embodiment, the over-temperature protection module has the following features: one end of the thermistor R4 is connected to the NTC thermistor pin 3 of the charging chip U1, and the other end is grounded. The charging chip U1 determines the battery temperature by detecting the voltage of the thermistor R4, thereby realizing the over-temperature protection function of the charging module. The battery boost charging circuit realizes the over-temperature protection function of the circuit through the over-temperature protection module.

[0440] In one embodiment, the charging status indicator module has the following features: a resistor R5 is provided, one end of which is connected to the LED charging indicator pin 5 of the charging chip U1, and the other end is grounded; the LED charging indicator pin 5 of the charging chip U1 outputs a charging status signal PG. The battery boost charging circuit outputs and displays the charging status through the charging status indicator module.

[0441] As per the instruction manual Figure 17-4 As shown:

[0442] In one embodiment, the battery boost charging circuit includes a charging communication module, comprising: pin 2 of interface J1 connected to pin 5 to output the USB voltage VBUS of the boost charging circuit; pin 3 of the CC1 configuration channel and pin 4 of the CC2 configuration channel are respectively connected to pull-down resistors R6 and R7, the other ends of resistors R6 and R7 being grounded; and the detection of the voltage values ​​of CC1 and CC2 enables identification functions such as cable connection and removal, and socket / plug orientation; pins 1, 6, 7, and 8 of interface J1 are all grounded. The battery boost charging circuit identifies the USB voltage through the charging communication module.

[0443] One end of capacitors C10 and C11 is connected to the USB voltage VBUS, and the other end is grounded to filter current, stabilize voltage, and avoid voltage spikes; the USB voltage VBUS is grounded through the discharge resistor R8 to avoid unnecessary power consumption.

[0444] As per the instruction manual Figure 17-5 As shown:

[0445] In one embodiment, the battery boost charging circuit is further provided with circuit conversion interfaces BD, P1, and P2 to convert circuit signals from the portable fan.

[0446] Interface BD connects to the DIP switch, receives the P_EN enable signal from the DIP switch, and transmits it to the main control chip of the portable fan through interface P2 to control the locking or operation of the portable fan.

[0447] Interface P1 receives the speed adjustment signals KEY, KEY_X, and KEY_Y from the portable fan and transmits them to the main control chip of the portable fan through interface P2 to control the start / stop and speed adjustment of the portable fan.

[0448] Interface P2 also receives the VBAT battery voltage, USB voltage VBUS, and PG signals transmitted by the charging chip U1, and transmits them to the main control chip of the portable fan.

[0449] Example 18, see Figures 18-1 to 18-3 As shown.

[0450] As per the instruction manual Figures 18-1 to 18-3 As shown:

[0451] A charging management circuit for a portable fan includes at least one of a fast charging management unit 300 and a charging management unit 400. The fast charging management unit 300 includes a fast charging communication module, a fast charging control signal output module, a fast charging voltage setting module, and a fast charging current setting module. The charging management unit 400 includes a charging communication module, a charging drive module, a charging current detection module, a termination voltage setting module, a charging status output module, and an over-temperature protection module. The charging management circuit for the portable fan, equipped with both a fast charging management unit and a charging management unit, can switch between fast charging mode and normal boost charging mode.

[0452] Portable fans include: handheld fans, neck fans, desktop fans, waist fans, and headband fans.

[0453] The charging management circuit also includes: a charging adapter 100, a USB input unit 210, a USB output unit 220, a control unit 500, a battery pack 600, and a charging display unit 700; the charging adapter 100 is connected to the USB input unit 210; the USB output unit 220 is connected to the fast charging management unit 300 and the charging management unit 400; the fast charging management unit 300 and the charging management unit 400 are connected to the control unit 500; the fast charging control signal output module of the fast charging management unit 300 is connected to the controlled end of the switching circuit; the charging management unit 400 is connected to the battery pack 600, and the fast charging management unit 300 and the control unit 500 are connected to the battery pack 600 through the charging management unit 400; the charging display unit 700 is connected to the control unit 500.

[0454] The portable fan is connected to the battery pack 600 via the charging adapter 100, USB input unit 210, USB output unit 220, fast charging management unit 300, charging management unit 400, and control unit 500; the fast charging management unit 300 and charging management unit 400 communicate with the charging adapter 100 via the USB interface.

[0455] The USB output unit 220 includes a USB interface J1, the fast charging management unit 300 includes a power protocol chip (USB PDSink) U2, and the charging management unit 400 includes a charging chip U1.

[0456] Pins A1B12 and A12B1 of USB interface J1 are grounded; the fast charging management unit 300 and the charging management unit 400 are connected to the VBUS pins A4B9 and A9B4 of USB interface J1 for introducing external power; the DP data pin A6B6 and the DM data pin A7B7 of USB interface J1 are connected to the fast charging management unit 300 and the charging management unit 400 for identifying the external power source. DP (data plus, positive data signal) and DM (data minus, negative data signal) are USB data signal lines.

[0457] In one embodiment, the power supply protocol chip U2 is connected to the USB interface J1 via the data signal lines and configuration channels of the fast charging communication module. The fast charging communication module includes: the DP' data pin 2 of the power supply protocol chip U2 is connected to the DP data pins A6 and B6 of the USB interface J1 via a current-limiting resistor R1; the DM' data pin 3 of the power supply protocol chip U2 is connected to the DM data pins A7 and B7 of the USB interface J1 via a current-limiting resistor R2; the first pin 4 of the CC1 configuration channel and the second pin 5 of the CC2 configuration channel of the power supply protocol chip U2 are respectively connected to the first pin A5 of the CC1 configuration channel and the second pin B5 of the CC2 configuration channel of the USB interface J1; the first pin 4 of the CC1 configuration channel (Connection Configuration) and the second pin 5 of the CC2 configuration channel of the power supply protocol chip U2 are grounded via capacitors C1 and C2 respectively, and capacitors C1 and C2 are used to filter current and stabilize voltage. The fast charging communication module of the power supply protocol chip U2 is connected to the charging adapter 100 via a USB cable to establish data mode (DM, DP communication) and fast charging communication mode (Powered Device: PD2.0 / 3.0, Quick Connect: QC2.0 / 3.0, Appledivider3, BatteryCharge: BC1.2 SDP, Digital Communication Protocol / Charging Downstream Port: DCP / CDP) for requesting, identifying and monitoring the voltage required for charging the portable fan battery pack 600.

[0458] In one embodiment, the fast charging control signal output module includes: the power protocol chip U2 establishes fast charging communication with the charging adapter 100 through the configuration channel pins (pins 4 and 5); and outputs a fast charging drive signal through the fast charging drive pin 10.

[0459] In one embodiment, the VIN chip power supply pin 1 of the power supply protocol chip U2 is connected to VBUS through a current-limiting resistor R3, and the VIN chip power supply pin 1 of the power supply protocol chip U2 is grounded through a voltage-regulating capacitor C3.

[0460] The fast charging voltage setting module includes: the VSET voltage setting pin 8 of the power protocol chip U2 is grounded through resistor R4. The power protocol chip U2 obtains the voltage signal of resistor R4, thereby setting the charging voltage of the battery pack 600 in fast charging mode; the fast charging voltage of the battery pack 600 can be changed by changing the resistance value of R4.

[0461] The fast charging current setting module includes: the ISET current setting pin 9 of the power protocol chip U2 is grounded through resistor R5. The power protocol chip U2 obtains the voltage signal of resistor R5, thereby setting the charging current of battery pack 600 in fast charging mode; the fast charging current of battery pack 600 can be changed by changing the resistance value of R5.

[0462] The fast charging mode works as follows:

[0463] The power protocol chip U2 establishes PD fast charging communication with the charging adapter 100 through the first pin 4 of the CC1 configuration channel and the second pin 5 of the CC2 configuration channel. It sets the fast charging voltage through the monitored VSET voltage setting pin 8 signal and sets the fast charging current through the monitored ISET current setting pin 9 signal. It outputs a fast charging drive signal through the GATE pin 10. The charging head outputs a high voltage to fast charge the battery pack 600. It communicates with the control unit 500 of the portable fan through the I2C (serial bus) bus via the SDA (serial data line) pin 6 and the SCL (serial clock line) pin 7 to transmit the fast charging status.

[0464] The VBUS charging input pin 1 of the charging chip U1 is connected to VBUS; one end of the voltage regulator capacitor C4 is connected to the VBUS charging input pin 1 of the charging chip U1, and the other end is grounded, which is used to filter the current and stabilize the power supply.

[0465] In one embodiment, the charging communication module includes: the DPC data positive signal pin 5 of the charging chip U1 is connected to the USB data positive signal via a current-limiting resistor R6, and the DMC data negative signal pin 6 is connected to the USB data negative signal via a current-limiting resistor R7. The charging communication module is used by the charging chip U1 to identify the external power supply status.

[0466] In one embodiment, the charging drive module includes: the first inductor pin 12 of SW1 and the second inductor pin 13 of the charging chip U1 are respectively connected to the two ends of the transformer energy storage inductor L1; the first bootstrap capacitor pin 11 of BT1 and the second bootstrap capacitor pin 14 of BT2 of the charging chip U1 are respectively connected to the two ends of the transformer energy storage inductor L1 through capacitors C5 and C6, and capacitors C5 and C6 are bootstrap capacitors to provide boost bias voltage for the boost circuit; the two ends of the transformer energy storage inductor L1 are respectively grounded through current limiting resistors R8 and R9; two RC circuits are set on the NC of the charging chip U1 and connected in parallel with R8 and R9 and then grounded, which can be used to filter out high frequency signals.

[0467] The VBAT charging output pin 3 of charging chip U1 is connected to battery pack 600; filter capacitors C7, C8, C9, C10, and C11 are connected in parallel, with one end connected to pin 3 of charging chip U1 and the other end grounded; the positive terminal of diode D2 is grounded, and the negative terminal is connected to the VBAT charging output pin 3 of charging chip U1. Charging chip U1 charges battery pack 600 through a boost charging method via the charging driver module.

[0468] The normal charging mode works as follows:

[0469] The charging adapter 100 is a common charging adapter. The charging chip U1 communicates with the charging adapter 100 through the DPC data positive signal pins 5 and 6 to request the charging voltage. The charging chip U1 controls the internally integrated MOS transistor circuit to charge and store energy for the inductor L1. Then, the charging chip U1 turns on the MOS transistor circuit to release the energy of the inductor L1. At this time, the inductor L1 and VBUS are connected in series and superimposed to achieve a boost effect, which charges the battery pack 600 through the boost circuit.

[0470] The charging chip U1 has a buck-boost function. When the input voltage is lower than the charging voltage, the charging chip U1 will boost the voltage to the charging voltage to charge the battery pack 600. When the input voltage is higher than the charging voltage, the charging chip U1 will reduce the voltage to the charging voltage to charge the battery pack 600.

[0471] In one embodiment, the charging current detection module: the CSP current sampling positive pin 20 and CSN current sampling negative pin 21 of the charging chip U1 are connected through a sampling resistor R10 to sense the charging current; capacitors C12, C13, C14, and C15 are connected in parallel, with one end connected to the CSP current sampling positive pin 20 of the charging chip U1 and the other end grounded, to filter the current and stabilize the voltage; the CSO induced current monitoring pin 19 of the charging chip U1 is grounded through a resistor R11, and the voltage of the CSO induced current monitoring pin 19 of the charging chip U1 is proportional to the induced charging current. The charging chip U1 detects the charging current value of the battery pack 600 through the charging current detection module.

[0472] In one embodiment, the termination voltage setting module: the CSE battery termination voltage setting pin 7 of the charging chip U1 is grounded through resistor R12, and the resistance value of resistor R12 is used to set the battery termination voltage in charging mode.

[0473] In one embodiment, the over-temperature protection module: the NTC thermistor pin 18 of the charging chip U1 is grounded via resistor R14.

[0474] Charging status output module: The PG charging status pin 8 of the charging chip U1 is connected to the power supply voltage VCC through the pull-up resistor R13, and the charging chip U1 outputs the charging status signal through the PG charging status pin 8.

[0475] Loop compensation module: The COMP loop compensation pin 17 of the charging chip U1 is connected to the ground by an RC circuit consisting of resistor R15 and capacitor C17, which is used to enhance the stability and transient response of the circuit.

[0476] The VCC chip operating voltage output pin 9 of the charging chip U1 outputs the operating voltage, which is grounded through the voltage regulating capacitor C16.

[0477] Example 19, see Figures 19-1 to 19-3 As shown.

[0478] As per the instruction manual Figures 19-1 to 19-3 As shown:

[0479] A portable handheld fan includes a fan body 100 and a handheld part 200; the fan body 100 is provided with an air outlet 110 and an air inlet 120.

[0480] An air inlet 120 is located at the rear or side of the fan body 100, and an air outlet 110 is located at the front of the fan body 100. The portable handheld fan includes at least one of a cooling component and a misting component. The cooling component is primarily used to cool the airflow passing through the fan body 100; it is located within the fan body 100. The misting component is primarily used to increase the humidity of the airflow, replenish moisture, and improve airflow comfort; it is located on the handheld part 200. The cooling component and misting component enable the portable handheld fan to possess at least one of a cooling function and atomization function, enhancing its cooling capability and improving comfort.

[0481] In one embodiment, the portable handheld fan is provided with a mode switching wheel 210 and / or a toggle switch 220; the mode switching wheel 210 and the toggle switch 220 may be disposed on the handheld part 200; the toggle switch 220 is used to control the "locked" or "standby" state of the portable handheld fan. When the toggle switch 220 is in the "locked" position, the mode switching wheel 210 will not be able to control the working state of the portable handheld fan. When the toggle switch 220 is in the "standby" position, the fan status signal sent by the mode switching wheel 210 is used to control the working state of the portable handheld fan; the mode switching wheel 210 is used to control the start / stop, cooling state, atomization state, and wind speed adjustment of the portable handheld fan.

[0482] The operation process of the portable handheld fan is as follows:

[0483] The toggle switch 220 is used to control the lock or standby mode of the portable handheld fan: when the toggle switch 220 is in the "locked" position, the portable handheld fan cannot operate. When the toggle switch 220 is in the "standby" position, the user can control the operating mode of the portable handheld fan via the mode switching wheel 210: In standby mode, the user presses the mode switching wheel 210 once to send a "start" operating status signal to the control chip of the portable handheld fan. The control chip of the portable handheld fan captures the "start" command and controls the fan motor to run, and the fan blows air out of the air outlet, putting the portable handheld fan in "blowing" mode; in the blowing mode, the user scrolls the mode switching wheel 210 upwards, and the operating speed of the portable handheld fan increases; in the blowing mode, the user scrolls the mode switching wheel 210 downwards, and the operating speed of the portable handheld fan decreases; in the blowing mode, the user presses the mode switching wheel 210 again to send a "stop" operating status signal to the control chip of the portable handheld fan. The control chip of the portable handheld fan captures the "stop" command and controls the fan motor to stop running.

[0484] The mode switching wheel 210 can also be used to switch between the following modes according to the usage scenario: strong wind, natural wind, gentle wind, cool wind, and water mist. When the mode switching wheel 210 is turned to "strong wind," the portable handheld fan blows a high-speed strong wind; when the mode switching wheel 210 is turned to "natural wind," the portable handheld fan blows a natural wind speed; when the mode switching wheel 210 is turned to "gentle wind," the portable handheld fan blows a gentle wind speed; when the mode switching wheel 210 is turned to "cool wind," the cooling component is activated to cool the airflow passing through the fan body 100, and the portable handheld fan blows a cool wind; when the mode switching wheel 210 is turned to "water mist," the misting component is activated to cool the airflow passing through the fan body 100, increase the humidity of the airflow, and replenish moisture, and the portable handheld fan blows a wind containing water mist; the cool wind and water mist modes of the mode switching wheel 210 can be activated separately, simultaneously, or in conjunction with any of the strong wind, natural wind, and gentle wind modes.

[0485] In one embodiment, the cooling component includes a refrigeration device that can be used to reduce the ambient air temperature; the cooling component also includes an air guide duct 400, which is disposed within the fan body 100. The air guide duct 400 can be independently disposed within the fan cylinder 310 of the fan body 100, or it can be disposed inside the fan cylinder 310 of the fan body 100, forming an integral structure with the fan cylinder 310. The fan cylinder 310 is also used to support the components of the cooling component of the portable handheld fan. The air guide duct 400 is used to guide the airflow to blow out evenly and improve the air output efficiency; the spray component includes an air compressor 720, a liquid guide pipe 730, and an atomizing part 740. The air compressor 720 can be an air compressor or an air compressor pump, etc. The air compressor 720 pressurizes the liquid into the atomizing part 740 through the liquid guide pipe 730. The atomizing part 740 atomizes the liquid, and the portable handheld fan blows out liquid water mist through the spray component.

[0486] As per the instruction manual Figure 19-1 , Figure 19-2 As shown:

[0487] In one embodiment, the portable handheld fan has a cooling function, and the cooling device includes a temperature conduction mesh 610, a temperature conduction element 620, and a semiconductor cooling element 630. The temperature conduction mesh 610 is used to increase the air contact area and improve the cooling effect; the semiconductor cooling element 630 is used to cool down and generate a cool temperature; the temperature conduction element 620 is used to conduct the temperature of the semiconductor cooling element 630; the temperature conduction mesh 610 and the temperature conduction element 620 can be independent devices or an integral part of the device structure.

[0488] In one embodiment, a cooling device is disposed inside the air duct 400, and a semiconductor cooling device 630 is used to cool down and generate a cool temperature; a temperature conducting device 620 is provided with a limiting hole 640 for mounting the semiconductor cooling device 630; a temperature conducting mesh 610 is installed outside the temperature conducting device 620 and disposed inside the air duct 400 to increase the contact area with the air inside the air duct 400 and improve the cooling effect.

[0489] As per the instruction manual Figure 19-1 , Figure 19-3 As shown:

[0490] In one embodiment, the portable handheld fan has an atomizing function. The handheld part 200 is provided with a liquid storage tank 710, an air compressor 720, a liquid guide tube 730, and an atomizing part 740. The air compressor 720 can be an air compressor or an air compressor pump, etc. The fan body 100 is provided with an atomizing nozzle 750. The liquid storage tank 710 is used to store liquids, including: purified water, toner, moisturizing water, etc.; the air compressor 720 is used to pressurize and force the liquid into the liquid guide tube 730; the liquid guide tube 730 is used to transport the liquid; there are one or more atomizing nozzles 750, and the atomizing part 740 is used to atomize the liquid; the atomizing nozzles 750 are also used to spray the atomized liquid into the fan body 100.

[0491] In one embodiment, a liquid storage tank 710 is disposed at the bottom of the handheld part 200 for storing liquids, including: purified water, toner, moisturizing water, etc.; an air compressor 720 is disposed inside the liquid storage tank 710 for pressurizing and forcing the liquid into the liquid guide tube 730; the liquid inlet of the liquid guide tube 730 is disposed inside the liquid storage tank 710 to transmit the liquid into the atomizing part 740; the atomizing part 740 is disposed at the top of the handheld part 200, and there are one or more atomizing nozzles 750 to atomize the liquid transmitted by the liquid guide tube 730 and send the atomized liquid into the fan body 100 through the atomizing nozzles 750.

[0492] As per the instruction manual Figure 19-1 , Figure 19-2 As shown:

[0493] In one embodiment, the portable handheld fan has a cooling function. The fan body 100 includes a fan cylinder 310, a fan back cover 320, and a fan blade body 500. The fan cylinder 310 is used to carry the cooling components of the portable handheld fan. The fan back cover 320 and the fan cylinder 310 are separate independent structures, or the fan back cover 320 and the fan cylinder 310 are an integral structure.

[0494] In one embodiment, the air guide 400 is installed inside the fan cylinder 310. The air guide 400 can be independently installed inside the fan cylinder 310, or it can be installed inside the fan cylinder 310 to form an integral structure with the fan cylinder 310. The fan cylinder 310 is also used to carry the cooling components of the portable handheld fan. The fan blade 500 is installed at the rear or inside of the air guide 400. The fan blade 500 blows air into the fan cylinder 310 and blows it out evenly through the air guide 400.

[0495] In one embodiment, the fan back cover 320 is disposed at the rear of the portable handheld fan and is equipped with an air filter. Air enters the interior of the fan back cover 320 through the air inlet 120 and is filtered by the air filter. A photocatalyst layer may also be disposed on the air filter to achieve a sterilization effect.

[0496] The portable handheld fan is also provided with a lanyard hole 230; the lanyard hole 230 is provided on the handheld part 200 for attaching a carrying lanyard or ornament, and the user can fix the portable handheld fan in place through the lanyard hole 230.

[0497] 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 by, The portable fan comprises a blowing part and a handheld part, at least part of the blowing part is cylindrical, the handheld part is provided with a first connecting piece, the blowing part is provided with a second connecting piece, the blowing part and the handheld part are connected through a fixing piece, the fixing piece passes through the first connecting piece and the second connecting piece, and the blowing part and the handheld part are connected, part of the handheld part is embedded in the blowing part and / or part of the blowing part is embedded in the handheld part.

2. The portable fan of claim 1, wherein: The blowing part comprises an inner shell, an outer shell and a fan assembly, the inner shell is formed with an air passage, an air inlet communicated with one side of the air passage and an air outlet communicated with the other side of the air passage, the fan assembly is arranged in the air passage, and the outer shell is used for covering the outside of the inner shell and has a mounting port.

3. The portable fan of claim 2, wherein: A baffle is arranged at a position close to the handheld part in the inner shell, the diameter of at least part of the inner wall of the inner shell gradually increases in the direction from the air inlet to the air outlet, an inwardly recessed space is formed at one end of the inner shell close to the air inlet, and the baffle is arranged at the inwardly recessed space.

4. The portable fan of claim 2, wherein: A fan base is arranged in the inner shell, a first circuit board is arranged at the rear side of the fan base, a second circuit board is arranged on the handheld part, a first wire channel is radially arranged on the fan base, the first wire channel is used for accommodating a wire between the first circuit board and the second circuit board, the wire is led out from the first circuit board to the second circuit board, the inner shell comprises a first inner shell and a second inner shell arranged in sequence from front to back, a display screen is arranged at the front end of the first inner shell, and the air outlet is arranged along the outer periphery of the display screen; the display screen is used for displaying the working state of the portable fan, and at least includes the remaining power, the current wind speed and the charging power during charging.

5. The portable fan of claim 2, wherein: The portable fan further comprises at least one structure of a cooling assembly and a spraying assembly; the cooling assembly is arranged in the blowing part; and the spraying assembly is arranged on the handheld part.

6. The portable fan of claim 5, wherein: The cooling assembly comprises a refrigeration device and a wind guide cylinder, the refrigeration device is arranged in the wind guide cylinder, and the refrigeration device is used for reducing the temperature of the surrounding air; the blowing part comprises an inner shell and an outer shell, the front end of the inner shell is provided with the wind guide cylinder, and the air outlet is arranged along the outer periphery of the wind guide cylinder; and the wind guide cylinder is used for guiding the airflow to blow out uniformly.

7. The portable fan of claim 1, wherein: The handheld part is provided with a switch, an interface and a battery, the switch is a stepless speed regulating switch, the stepless speed regulating switch comprises a roller key, and / or the roller is arranged directly below the air outlet so as to roll the roller key up and down by the thumb when aiming at the air outlet.

8. The portable fan of claim 7, wherein: Further comprising an anti-misoperation key arranged on the handheld part, the anti-misoperation key is exposed on the handheld part, and the anti-misoperation key is used for preventing the portable fan from being started by mistake.

9. The portable fan of claim 1, wherein: Further comprising a motor arranged in the inner shell, a motor rotating shaft is arranged in the shaft hole of the motor and can rotate relative to the motor, a fan blade is connected to the top of the motor rotating shaft, the motor drives the fan blade to rotate, a damping spring is arranged between the motor and the fan blade, and the damping spring is sleeved on the motor rotating shaft.

10. The portable fan of claim 9, wherein: The front side of the fan blade is provided with a pressurizing seat; the pressurizing seat comprises a pressurizing surface which is at least partially radially increased from the direction of air inlet to air outlet.

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