Portable fan

Abstract

A portable fan (100) comprises an air supply part (10) and a handheld part (11), a first connecting piece (13) is arranged on the handheld part, the air supply part is provided with a second connecting piece (14), the air supply part and the handheld part are connected through a fixing piece (12), the fixing piece penetrates through the first connecting piece and the second connecting piece, and the air supply part and the handheld part are connected. 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, the replaced handheld part is maintained or charged, and the handheld part capable of working normally or other handheld parts with electricity are replaced. And the endurance performance of the product is improved.

Description

portable fan Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a portable fan. Background Art

[0002] Currently, the more common portable fans are assembled by splicing the front shell and the back shell. If the portable fan fails, it is inconvenient to replace the battery, the maintenance is cumbersome, and the battery life is reduced.

[0003] Utility Model Content

[0004] In view of this, the present invention provides a portable fan that can improve endurance performance.

[0005] The utility model provides a portable fan, comprising: an air supply part and a handheld part, wherein the handheld part is provided with a first connecting piece, the air supply part is provided with a second connecting piece, the air supply part and the handheld part are connected via a fixing piece, the fixing piece passes through the first connecting piece and the second connecting piece to connect the air supply part and the handheld part, a part of the handheld part is embedded in the air supply part and / or a part of the air supply part is embedded in the handheld part.

[0006] If the handheld part of the portable handheld fan of the present invention fails or the battery in the handheld part is out of power, the handheld part can be replaced separately, the replaced handheld part can be repaired or charged, and then replaced with a handheld part that can work normally or another handheld part with power, thereby increasing the battery life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1-1 is a three-dimensional diagram of the portable fan of the present invention.

[0008] Figure 1-2 is an exploded diagram of the fan shown in Figure 1-1.

[0009] FIG1-3 is an exploded schematic diagram of the fan shown in FIG1-2 with the sleeve removed.

[0010] 1-4 are schematic structural diagrams of the fan base of the portable fan of the present invention.

[0011] 1-5 are schematic structural diagrams of the pressure base of the portable fan of the present invention.

[0012] 1-6 are schematic structural diagrams of the sleeve of the portable fan of the present invention.

[0013] FIG2-1 is a perspective view of the first embodiment of the portable fan of the present invention.

[0014] FIG2-2 is a cross-sectional view of the first embodiment of the portable fan of the present invention.

[0015] Figure 2-3 is an enlarged view of part A in Figure 2-2.

[0016] 2-4 are cross-sectional views of the first embodiment of the portable fan of the present invention from another direction.

[0017] 2-5 are cross-sectional views of a second embodiment of the portable fan of the present invention.

[0018] 2-6 are cross-sectional views of a third embodiment of the portable fan of the present invention.

[0019] Figure 3-1 is a schematic diagram of the air supply unit described in Example 3-1 of the present utility model.

[0020] Figure 3-2 is a schematic diagram of the explosion of the air supply part shown in Figure 3-1.

[0021] Figure 3-3 is a cross-sectional schematic diagram of the air supply part described in Example 3-1 of the present utility model.

[0022] 3-4 are schematic diagrams of the display screen.

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

[0024] Figure 3-6 is a schematic diagram of the portable fan described in Example 3-2 of the present invention.

[0025] Figure 3-7 is a cross-sectional view of the portable fan described in Example 3-2 of the present invention.

[0026] FIG4-1 is a schematic diagram of the three-dimensional structure of a handheld fan according to an embodiment of the present utility model.

[0027] FIG4-2 is a schematic diagram of the three-dimensional structure of the handheld fan according to an embodiment of the present invention from another angle.

[0028] FIG4-3 is a schematic diagram of the three-dimensional structure of a local structure of an embodiment of the present utility model.

[0029] Figure 4-4 is an exploded view of an embodiment of the present invention.

[0030] 4-5 are schematic diagrams of an air volume adjustment circuit according to an embodiment of the present invention.

[0031] 4-6 are schematic diagrams of the air volume adjustment circuit according to an embodiment of the present invention.

[0032] FIG5-1 is a schematic diagram of the three-dimensional structure of a handheld fan according to an embodiment of the present utility model.

[0033] FIG5-2 is a schematic diagram of the three-dimensional structure of the handheld fan according to an embodiment of the present invention from another angle.

[0034] FIG5-3 is a schematic diagram of the three-dimensional structure of a local structure of an embodiment of the present utility model.

[0035] Figure 5-4 is an exploded view of an embodiment of the present utility model.

[0036] Figure 5-5 is a schematic diagram of the air volume adjustment circuit of an embodiment of the present utility model.

[0037] 5-6 are schematic diagrams of the air volume adjustment circuit according to an embodiment of the present invention.

[0038] FIG6-1 is a schematic structural diagram of a handheld structure for a handheld fan provided in an embodiment of the present utility model.

[0039] FIG6-2 is a schematic structural diagram of a mounting frame and a circuit board assembly in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0040] FIG6-3 is a schematic structural diagram of a gear knob assembly and a battery in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0041] FIG6-4 is a schematic structural diagram of a protective switch button assembly in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0042] FIG6-5 is a schematic structural diagram of a handheld portion and an air supply structure in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0043] FIG6-6 is a schematic structural diagram of a clamping plate in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0044] 6-7 are schematic structural diagrams of a first support plate and a second support plate in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0045] 6-8 are schematic structural diagrams of an accommodation space in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0046] 6-9 are schematic structural diagrams of an isolation plate in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0047] 6-10 are schematic structural diagrams of a first protrusion and a second protrusion in a handheld structure for a handheld fan provided by an embodiment of the present invention.

[0048] FIG7-1 is a schematic structural diagram of a handheld fan provided in an embodiment of the present utility model.

[0049] FIG7-2 is a schematic structural diagram of a mounting frame in a handheld fan provided in an embodiment of the present utility model.

[0050] FIG7-3 is a schematic structural diagram of a handheld housing in a handheld fan provided by an embodiment of the present invention.

[0051] FIG7-4 is a schematic structural diagram of a control mechanism in a handheld fan provided in an embodiment of the present utility model.

[0052] FIG7-5 is a schematic structural diagram of a mounting slot in a handheld fan provided by an embodiment of the present utility model.

[0053] FIG7-6 is a schematic structural diagram of a housing of a handheld fan provided by an embodiment of the present utility model.

[0054] Figure 7-7 is a schematic structural diagram of a first circuit board in a handheld fan provided by an embodiment of the present utility model.

[0055] 7-8 are schematic structural diagrams of an inner shell of a handheld fan provided by an embodiment of the present invention.

[0056] FIG8-1 is a schematic structural diagram of an air supply device of a handheld fan provided in an embodiment of the present utility model.

[0057] FIG8-2 is a schematic structural diagram of a mounting frame in an air supply device of a handheld fan provided in an embodiment of the present utility model.

[0058] FIG8-3 is a schematic structural diagram of a handheld portion of an air supply device of a handheld fan provided in an embodiment of the present invention.

[0059] FIG8-4 is a schematic structural diagram of a wiring opening in an air supply device of a handheld fan provided by an embodiment of the present utility model.

[0060] FIG8-5 is a first structural diagram of a wire duct in an air supply device of a handheld fan provided by an embodiment of the present invention.

[0061] FIG8-6 is a second structural schematic diagram of a wire duct in an air supply device of a handheld fan provided by an embodiment of the present invention.

[0062] 8-7 is a schematic structural diagram of a gear knob assembly and a protection switch button assembly in an air supply device of a handheld fan provided by an embodiment of the present invention.

[0063] FIG8-8 is a schematic structural diagram of an inner shell and an outer shell in an air supply device of a handheld fan provided by an embodiment of the present utility model.

[0064] 8-9 are schematic structural diagrams of an air inlet and an air outlet in an air supply device of a handheld fan provided by an embodiment of the present invention.

[0065] Figure 8-10 is a schematic diagram of the locally enlarged structure of point A in Figure 8-9.

[0066] 8-11 are schematic structural diagrams of a fan assembly in an air supply device of a handheld fan provided in an embodiment of the present invention.

[0067] FIG9-1 is a schematic structural diagram of an air supply mechanism of a handheld fan provided in an embodiment of the present utility model.

[0068] FIG9-2 is a schematic structural diagram of a shell and a support frame in an air supply mechanism of a handheld fan provided by an embodiment of the present utility model.

[0069] FIG9-3 is a schematic structural diagram of a limit bar in an air supply mechanism of a handheld fan provided by an embodiment of the present utility model.

[0070] FIG9-4 is a schematic structural diagram of an air outlet in an air supply mechanism of a handheld fan provided in an embodiment of the present utility model.

[0071] FIG9-5 is a schematic structural diagram of an air inlet in an air supply mechanism of a handheld fan provided by an embodiment of the present utility model.

[0072] FIG9-6 is a schematic structural diagram of a sleeve and an air inlet cover in an air supply mechanism of a handheld fan provided by an embodiment of the present utility model.

[0073] FIG10-1 is a schematic diagram of a handheld fan provided in an embodiment of the present invention.

[0074] FIG10-2 is an exploded schematic diagram of a handheld fan provided in an embodiment of the present invention.

[0075] FIG10-3 is a schematic diagram of an air inlet cover provided in an embodiment of the present utility model.

[0076] FIG10-4 is a schematic diagram of an air duct formation provided by an embodiment of the present utility model.

[0077] Figure 10-5 is a schematic diagram of a fan blade provided in an embodiment of the present utility model.

[0078] FIG10-6 is a bottom view of an air supply unit provided in an embodiment of the present utility model.

[0079] FIG10-7 is a schematic diagram of an integrally formed motor shaft and fan blades provided in an embodiment of the present invention.

[0080] FIG10-8 is a schematic diagram of a shock-absorbing spring provided in an embodiment of the present utility model.

[0081] Figure 10-9 is a connection diagram of a handheld part and an air supply part provided in an embodiment of the present utility model.

[0082] Figure 11-1 is a three-dimensional diagram of a handheld fan provided by the present invention.

[0083] Figure 11-2 is an exploded view of a handheld fan provided by the present invention.

[0084] Figure 11-3 is a three-dimensional view of an air inlet cover of a handheld fan provided by the present invention.

[0085] FIG11-4 is a cross-sectional view of a handheld fan provided by the present invention along the AA section line.

[0086] FIG11-5 is a three-dimensional diagram of an air supply assembly of a handheld fan provided by the present invention in a certain direction.

[0087] FIG11-6 is a three-dimensional view of the air supply assembly of a handheld fan provided by the present invention in another direction.

[0088] FIG12-1 is a three-dimensional diagram of a handheld fan provided by the present invention.

[0089] FIG12-2 is a cross-sectional view of a handheld fan provided by the present invention along the AA section line.

[0090] FIG12-3 is another stereoscopic view of a handheld fan provided by the present invention.

[0091] Figure 12-4 is a three-dimensional view of an air inlet cover of a handheld fan provided by the present invention.

[0092] FIG12-5 is a three-dimensional view of a first side wall of a handheld fan provided by the present invention.

[0093] FIG13-1 is a three-dimensional diagram of a handheld fan provided in an embodiment of the present invention.

[0094] FIG13-2 is an exploded perspective view of a handheld fan provided in an embodiment of the present invention.

[0095] FIG13-3 is an exploded perspective view of the air supply portion of a handheld fan provided in an embodiment of the present invention.

[0096] FIG13-4 is a wiring diagram of a handheld fan provided in an embodiment of the present utility model.

[0097] FIG13-5 is a three-dimensional view of a handheld fan provided by an embodiment of the present invention from another angle.

[0098] FIG13-6 is a cross-sectional schematic diagram of a handheld fan provided in an embodiment of the present invention.

[0099] FIG14-1 is a schematic diagram of a handheld fan provided in an embodiment of the present invention.

[0100] FIG14-2 is an exploded schematic diagram of a handheld fan provided in an embodiment of the present invention.

[0101] FIG14-3 is a schematic diagram of an air supply unit provided in an embodiment of the present utility model.

[0102] FIG14-4 is a cross-sectional view of a handheld fan provided in an embodiment of the present invention.

[0103] FIG14-5 is a schematic diagram of an air supply assembly provided in an embodiment of the present utility model.

[0104] FIG14-6 is a schematic diagram of an impeller assembly provided in an embodiment of the present invention.

[0105] FIG14-7 is a connection diagram of a hand-held portion and an air supply portion provided in an embodiment of the present utility model.

[0106] FIG15-1 is a three-dimensional diagram of a handheld fan provided in an embodiment of the present invention.

[0107] FIG15-2 is an exploded perspective view of a handheld fan provided in an embodiment of the present invention.

[0108] FIG15-3 is an exploded perspective view of the air supply portion of a handheld fan provided in an embodiment of the present invention.

[0109] FIG15-4 is a three-dimensional view of a handheld fan provided by an embodiment of the present invention from another angle.

[0110] FIG15-5 is a schematic diagram of wiring of a handheld fan provided in an embodiment of the present invention.

[0111] FIG15-6 is a cross-sectional schematic diagram of a handheld fan provided in an embodiment of the present invention.

[0112] Figure 16-1 is a block diagram of the motor drive control circuit for a portable fan.

[0113] Figure 16-2 is the schematic diagram of the voltage stabilizing unit circuit.

[0114] Figure 16-3 is the schematic diagram of the motor drive control circuit.

[0115] Figure 16-4 is the schematic diagram of the rotor position detection circuit.

[0116] Figure 16-5 is the circuit diagram of the motor drive control unit.

[0117] Figure 16-6 is the schematic diagram of the main control unit circuit.

[0118] Figure 16-7 is the schematic diagram of the display unit circuit.

[0119] Figure 17-1 is a module diagram of the battery boost charging circuit for a portable fan.

[0120] Figure 17-2 shows the boost module circuit of the battery boost charging circuit of the portable fan.

[0121] Figure 17-3 shows the battery boost charging circuit of the portable fan, including the charging voltage preset module, over-temperature protection module, and charging status indication module.

[0122] Figure 17-4 shows the USB interface circuit of the battery boost charging circuit of the portable fan.

[0123] Figure 17-5 shows the signal transmission module of the battery boost charging circuit of the portable fan.

[0124] Figure 18-1 is a module diagram of the charging management circuit for a portable fan.

[0125] Figure 18-2 is the circuit schematic diagram of the USB interface and fast charging management unit.

[0126] Figure 18-3 is the circuit schematic of the charging management unit.

[0127] Figure 19-1 is a side view of a portable handheld fan.

[0128] Figure 19-2 is a structural diagram of a portable handheld fan cooling component.

[0129] Figure 19-3 is a structural diagram of a portable handheld fan spray assembly. DETAILED DESCRIPTION

[0130] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0131] In the description of the present invention, the terms "front", "rear", "top", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0132] In the description of the embodiments of the present invention, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is merely a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two, and other quantifiers should be understood similarly. The preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0133] It should be understood that while the terms "first," "second," and the like may be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used solely to distinguish one element, component, region, layer, or section from another. Thus, a first element, component, region, layer, or section discussed below could be referred to as a second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments. Spatially relative terms, such as "below" and "above," may be used herein to describe the relationship of one element or feature to another. It should be understood that spatially relative terms encompass different orientations of a device during use or operation, in addition to the orientations depicted in the figures. For example, if the device in the figures were flipped over, an element or feature described as "below" would be oriented "above" other elements or features. Thus, the exemplary term "below" encompasses both above and below orientations. The device may be oriented (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly. In this utility model, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the 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 intermediate element.

[0134] At the same time, in the embodiments of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0135] Example 1, see Figures 1-1 to 1-6.

[0136] Referring to FIG. 1-1 , in this embodiment, a portable fan 100 is a handheld fan equipped with a handle 11 (not shown, the same below). The user can carry the portable fan 100 with them using the handle 11. Of course, the portable fan 100 can also be a clamping fan equipped with a clip, a flexible fan equipped with a curved shaping member for winding, a desktop fan equipped with a stand, or a floor fan equipped with a telescopic stand, without limitation. The handle 11 can be provided with a semiconductor cooling element (not shown, the same below), allowing the user to carry the portable fan 100 with them. The semiconductor cooling element can automatically adjust the cooling temperature based on the temperature of the part in contact with the user, enhancing the user's comfort while carrying the portable fan. It should be understood that the portable fan 100 is used for heat dissipation and cooling, and the semiconductor cooling element is provided to enhance the user's comfort while carrying the portable fan. Of course, the portable fan 100 can also be used for heat preservation and heating by adding a heating element (not shown). A heating element (not shown) can automatically adjust the temperature of the part in contact with the human body to warm the part in contact with the human body, enhancing the user's comfort while carrying the portable fan.

[0137] Referring to Figure 1-1, in this embodiment, the interior of the hand-held part 11 can accommodate a battery (not marked, the same below), and a switch button (not marked, the same below) and a charging port (not shown, the same below) can be exposed on the hand-held part 11. The battery powers the portable fan 100, the switch button is used to adjust the wind speed and switch, and the charging port is used to charge the battery with an external power supply. When the portable fan 100 is a fan of other forms (such as the above-mentioned clamping fan, versatile fan, desktop fan, etc.), the positions of the battery, switch button and charging port can be adjusted accordingly.

[0138] 1-1 to 1-6, the portable fan 100 includes an air supply part 10 and a hand-held part 11, the air supply part 10 and the hand-held part 11 are connected by a fixing part 12, a first connecting part 13 is provided on the hand-held part 11, and the air supply part 10 is provided with a second connecting part 14, the fixing part 12 passes through the first connecting part 13 and the second connecting part 14 to connect the air supply part 10 and the hand-held part 11, a protrusion 16 is provided at the end of the hand-held part 11, the protrusion 16 extends along the length direction of the hand-held part 11, and the protrusion 16 is inserted into the air supply part 10; the first connecting part 13 is provided on the protrusion 16, the air supply part 10 is provided with a limiting plate 17, the limiting plate 17 is provided with a second connecting part 14, and the fixing part 12 passes through the first connecting part 13 and the second connecting part 14 to connect the hand-held part 11 with the air supply part 10. If the handheld part 11 fails or the battery in the handheld part 11 is out of power, the handheld part 11 can be replaced separately, the replaced handheld part 11 can be repaired or charged, and replaced with a handheld part 11 that can work normally or another handheld part 11 with power to increase the battery life of the product.

[0139] 1-1 to 1-3 , part of the structure of the handheld portion 11 is embedded in the air supply portion 10, or part of the air supply portion 10 is embedded in the handheld portion 11. The embedded or inserted structural design can enhance the connection stability between the handheld portion 11 and the air supply portion 10 and prevent movement.

[0140] Referring to Figures 1-4 to 1-5, the air supply unit 10 includes a fan base 18 and a mixed flow fan 19 provided on the fan base 18, and a pressure seat 25 covered on the mixed flow fan 19. The mixed flow fan 19 is located on the front side of the fan base 18. The mixed flow fan 19 rotates around the rotating axis to generate airflow. The pressure seat 25 is located on the front side of the mixed flow fan 19. The pressure seat 25 includes a pressure surface that at least partially radially increases from an end away from the fan base 18 to an end close to the fan base 18.

[0141] 1-4 , the fan base 18 includes an inner ring 20 and an outer ring 21 and a plurality of connecting strips 22 connected between 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 the two connecting strips 22 . A second connecting member 14 is provided on the limiting plate 17 . During assembly, the protrusion 16 is inserted between the two connecting strips 22 to limit the circumferential relative 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 the 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 .

[0142] In another embodiment, one of the first connecting member 13 and the second connecting member 14 is a connecting slot 23, and the other is a connecting buckle 24. The connecting slot 23 and the connecting buckle 24 are of conventional design. The handheld part 11 and the air supply part 10 are connected through the connecting slot 23 and the connecting buckle 24. This connection and assembly method is efficient.

[0143] Referring to Figures 1-4 to 1-5, a slot 23 is provided on the outer wall surface of the outer ring 21 of the fan base 18 close to the pressure seat 25, and a buckle 24 is provided on the end of the pressure seat 25 close to the fan base 18. The pressure seat 25 is connected to the fan base 18, which is convenient to assemble and has high assembly efficiency.

[0144] 1-1 to 1-6 , a battery and a circuit board are provided inside the handheld portion 11 . The battery is electrically connected to the circuit board via a wire for controlling the start and rotation of the mixed flow fan 19 .

[0145] Referring to Figures 1-3 and 1-6, the air supply part 10 also includes a sleeve 26. The pressure seat 25, the fan base 18 and the mixed flow fan 19 are installed in the sleeve 26 to limit the radial movement of the pressure seat 25, the fan base 18 and the mixed flow fan 19 along the sleeve 26. They can only move axially from the two end openings of the sleeve 26 to prevent displacement and protect the internal structure.

[0146] 1-6 , the side wall of the sleeve 26 is provided with an assembly opening 27 for the protrusion 16 to pass through. The assembly opening 27 is provided to allow the protrusion 16 to pass through.

[0147] Referring to Figures 1-5, the outer wall of the pressurizing seat 25 is provided with support columns 28, and the two support columns 28 extend along the radial direction of the pressurizing seat 25. The two support columns 28 are connected by an arc plate 29, and 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, and at the same time prevent the hand-held part 11 from being pulled downward to deform the pressurizing seat 25, causing the inner wall of the pressurizing seat 25 to touch the fan blades and cause a malfunction.

[0148] The portable fan also includes a three-phase high-speed motor to improve battery life in high-speed and high-energy consumption usage scenarios by replacing the handheld part and / or the battery built into the handheld part.

[0149] Example 2, see Figures 2-1 to 2-6.

[0150] Figures 2-1 and 2-2 illustrate a first embodiment of a portable fan according to the present invention. The portable fan comprises a housing 1, a fan assembly 2, a motor 3, and a drive circuit board 4. The housing 1 is provided with an 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 out the air outlet 163.

[0151] As shown in Figures 2-1 and 2-2, the housing 1 includes a front housing 11 and a rear housing 12. The front housing 11 includes a first air housing 111 and a first handheld housing 112. The rear housing 12 includes a second air housing 121 and a second handheld housing 122. The first air housing 111 and the second air 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 air housing 111 and the second air housing 121 can be matched front to back or left to right; the first handheld housing 112 and the second handheld housing 122 can be matched 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 the fan may be provided in other common forms such as a desktop fan, a neck hanging fan, a clip fan, or a bracket fan.

[0152] As shown in Figures 2-2 to 2-4, the first air shell 111 comprises a first outer shell and a first inner shell that fit together. The first inner shell and the first outer shell are positioned in close contact, and both extend horizontally forward. The second air shell 121 comprises a second outer shell and a second inner shell that fit together. The rear ends of the second inner shell and the second outer shell are spaced apart and connected by a connector. The second outer shell extends horizontally forward. The second inner shell extends horizontally forward from the rear to the front, 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 the rear end of the first inner shell. In this embodiment, the first and second outer shells are integrally formed. Of course, in other embodiments, the first and second outer shells can also be formed separately. Both the first and second air shells 111 and 121 have a double-layer shell 1 structure, which is more stable. The shape of the second inner shell facilitates wind pressure treatment, making the wind more powerful and the airflow farther. Of course, in other embodiments, the first air shell 111 and / or the second air shell 121 can also have a single-layer shell 1 structure.

[0153] As shown in Figures 2-1 and 2-2, the housing 1 further includes a pressure member 13 disposed within the first air housing 111. A plurality of connecting blades 14 connect the pressure member 13 and the front housing 11. A base 131 and a sleeve 132 are formed within the pressure member 13. The base 131 is located between the front and rear ends of the pressure member 13 and forms a rearward clearance space 1321 within the pressure member 13. The base 131 forms a forward receiving portion 1322 within the pressure member 13. The sleeve 132 protrudes from the base 131 toward the accommodating cavity 162, that is, the sleeve 132 protrudes rearward from the base 131 and is hollow.

[0154] As shown in Figures 2-1 and 2-2, the air inlet 161 is located in the radially inner area of ​​the second inner shell, and the air outlet 163 is located in the radial area between the pressure member 13 and the first inner shell. The fan assembly 2 includes a hub 21 and a plurality of blades 22 spaced apart on the outer surface of the hub 21. The hub 21 includes a wind guide surface 212 that radially increases from back to front. The pressure member 13 includes a pressure surface 133 that radially increases from back to front. The wind guide surface 212 and the pressure surface 133 are spaced closely together so that the wind blows smoothly forward. From the air inlet 161 to the air outlet 163, a radially outward wind duct is formed, so that the wind is pressurized in the shell 1 and a larger wind outlet surface is formed.

[0155] As shown in Figures 2-1 to 2-4, the fan assembly 2 includes the hub 21 and a plurality of blades 22 spaced apart on the outer surface of the hub 21. A rotating shaft 23 is fixed to 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 accommodated in the hub 21. Furthermore, the hub 21 includes an annular extension wall 211, and both the stator 31 and the rotor 32 are accommodated in the extension wall 211. The stator 31 is sleeved outside the sleeve 132 and includes a coil 311. The rotor 32 is radially arranged between the stator 31 and the hub 21. The rotating shaft 23 is inserted into the sleeve 132, and the extension wall 211, the stator 31, and the rotor 32 extend forward into the clearance space 1321.

[0156] As shown in Figures 2-1 and 2-2, the extension wall 211 extends forward beyond the air guide surface 212. The air guide surface 212 and the pressure surface 133 are closely spaced. Therefore, the gap between the air guide surface 212 and the pressure surface 133 is offset from the front end of the extension wall 211, making it difficult for dust to enter and settle within the extension wall 211. Neither the stator 31 nor the rotor 32 extends forward beyond the extension wall 211. The extension wall 211, the stator 31, and the rotor 32 extend forward into the clearance space 1321, so that portions of the extension wall 211, the stator 31, and the rotor 32 are partially contained within the clearance space 1321.

[0157] As shown in Figures 2-1 and 2-2, the driver circuit board 4 is not positioned between the base 131 and the stator 31. The battery 7 is electrically connected to the driver circuit board 4, which is in turn electrically connected to the leads of the coil 311 to drive the fan assembly 2 to rotate, blowing air from the air inlet 161 through the accommodating cavity 162 and out the air outlet 163. In this embodiment, the driver circuit board 4 is housed in the accommodating portion 1322 formed forward of the base 131. The front end of the pressure member 13 also includes a front cover 15, which is disposed at the front end of the accommodating portion 1322 and is recessed rearward to form a negative pressure zone 151. The provision of the front cover 15 not only covers the accommodating portion 1322, shielding and protecting the driver circuit board 4, but also allows the negative pressure zone 151 formed by the rearward recess of the front cover 15 to compensate for air flow to the air outlet 163, thereby increasing the air volume at the air outlet 163.

[0158] As shown in Figures 2-1 to 2-4, in this embodiment, the motor 3 is a three-phase motor, and the coil 311 includes twelve windings. This large number of windings limits the internal space of the motor 3. By not locating the driver circuit board 4 between the base 131 and the stator 31, the electrical connection between the leads of the coil 311 and the driver circuit board 4 is simplified and more convenient. Furthermore, the space between the base 131 and the stator 31 can be further reduced, resulting in a more rational internal space distribution within the portable fan, thereby achieving miniaturization of the portable fan.

[0159] Figures 2-5 illustrate a second embodiment of the portable fan of the present invention. The main difference from the first embodiment is that the driver circuit board 4 is housed within the handle 17 and positioned between the switch 5 and the interface 6. The switch 5 is connected to the driver circuit board 4, and the interface 6 is connected to the driver circuit board 4. The remaining structure and performance are essentially the same as those of the first embodiment and will not be further described here.

[0160] Figures 2-6 illustrate a third embodiment of the portable fan of the present invention. The main difference from the first embodiment is that the driver circuit board 4 is housed within the handle 17 and located below the battery 7. The remaining structure and performance are essentially the same as those of the first embodiment and will not be further described here.

[0161] The portable fan of this embodiment has the following beneficial effects: by not arranging the driving circuit board between the base and the stator, the electrical connection between the leads of the coil and the driving 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.

[0162] Example 3-1, see Figures 3-1 to 3-5.

[0163] A portable fan includes an air supply unit 100; as shown in Figures 3-1 to 3-3, the air supply unit 100 includes a shell 1 provided with a accommodating chamber, an air supply assembly 2 provided in the accommodating chamber of the shell 1, a display screen 3 provided at the front end of the shell 1, an air outlet provided along the periphery of the display screen 3, and an air inlet provided at the rear end of the shell 1; the display screen 3 is used to display the working status. It should be noted that in the embodiment of the present utility model, the front end refers to the direction of the end facing the user when in use, and the rear end refers to the direction of the end away from the user when in use; the inside refers to the direction toward the central axis of the shell 1, and the outside refers to the direction away from the central axis of the shell 1; the top refers to the direction of the handheld part 200 toward the air supply unit 100. When in use, the display screen 3 can be used to display the remaining power, the current wind speed, and the charging power during charging.

[0164] As shown in Figures 3-4, the display screen 3 is positioned corresponding to the central axis region of the accommodating chamber, and at least a portion of the display screen 3 is 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 recessed axially from the central axis toward the rear end of the housing 1, so that the front side of the display screen 3 is shaped like a concave mirror. The front plane of the display screen 3 is concave, recessed toward the rear end of the housing 1, concentrating the airflow flowing out of the air outlet in the area corresponding to the display screen 3. This further concentrates the airflow blown by the portable fan, improving the blowing effect and enhancing the user experience, while also saving energy and increasing the battery life of the portable fan. As shown in Figure 3-3, in some embodiments, the plane bounded by the edges of the display screen 3 is lower than the plane bounded by the front edges of the housing 1. That is, the plane bounded by the display screen 3 is closer to the air inlet than the plane bounded by the front edges of the housing 1. This allows the display screen 3 to be positioned within the chamber of the housing 1, protecting the display screen 3 and preventing wear or damage to the display screen 3.

[0165] As shown in Figures 3-2 to 3-5, the housing 1 includes an inner housing 11 and an outer housing 12 that is sleeved over the inner housing 11. The inner housing 11 includes a first inner housing 111 and a second inner housing 112, arranged sequentially from front to back. A connection base 4 for mounting the display screen 3 is provided in the area corresponding to the rear of the housing chamber and the display screen 3. A plurality of reinforcing plates 41 are provided between the outer periphery of the connection base 4 and the inner wall of the first inner housing 111. The reinforcing plates 41 are evenly distributed along the outer periphery of the connection base 4, dividing the air outlet into a plurality of sub-air outlets evenly distributed around the display screen 3. In some embodiments, the cross-section of the sub-air outlets along the radial direction of the housing 12 is trapezoidal. The provision of the reinforcing plates 41 allows the connection base 4 to connect to the inner wall of the first inner housing 111 while providing support for the first inner housing 111, thereby enhancing the strength of the first inner housing 111. A mating connection structure is provided on the outer wall of the inner housing 11 and the inner wall of the outer housing 12. In some embodiments, the mating connection structure includes a connecting groove axially arranged on the outer wall of the inner shell 11 and a connecting protrusion arranged 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 external 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.

[0166] The display screen 3 and the connecting seat 4 are connected by a first snap-fit ​​assembly, which includes a first snap-fit ​​assembly 31 circumferentially arranged on the rear side of the display screen 3, and a first clamping block 42 arranged at the front end of the mounting seat and cooperating with the first snap-fit ​​assembly 31. Furthermore, the first snap-fit ​​assembly extends from the rear side of the display screen toward the air inlet, and a bevel is provided on the outer side of the rear end of the first snap-fit ​​assembly 31. The provision of the bevel reduces the resistance when the first snap-fit ​​assembly 31 and the first clamping block 42 are cooperating with each other, reduces the difficulty of assembly, improves the installation efficiency, acts as a buffer, avoids damage to the corner area when the first snap-fit ​​assembly 31 and the first clamping block 42 are connected, and facilitates the demolding of the mold during the manufacturing process. In other embodiments, the first snap-fit ​​assembly includes a first clamping block 42 arranged at the back of the display screen 3 and a first snap-fit ​​assembly 31 arranged at the front end of the connecting seat and cooperating with the first clamping block 42.

[0167] As shown in Figures 3-5, 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 clamping block 113 provided at the rear end of the first inner shell 111, and a second clip 114 provided at the front end of the second inner shell 112 and cooperating with the second clamping block 113; alternatively, the setting positions of the second clamping block 113 and the second clip 114 can be interchanged. For example, in some embodiments, the second clip 114 is provided at the rear end of the first inner shell 111, and the second clamping block 113 is provided at the front end of the second inner shell 112.

[0168] As shown in Figures 3-2 and 3-3, the air supply assembly 2 includes a drive motor 21 arranged along the central axis of the accommodating chamber, a fan rotor 22 arranged on the rotating shaft 211 of the drive motor 21, and blades 23 arranged on the outer wall of the fan rotor 22; the fan rotor 22 is generally hollow and truncated, with the end of the fan rotor 22 with a larger inner diameter facing the air outlet. The blades 23 are spirally streamlined, reducing the resistance of airflow from the air inlet to the air outlet, further ensuring the air outlet effect of the portable fan; the fan rotor 22 at least partially extends to the drive motor 21, and the area corresponding to the drive motor 21 and the fan rotor 22 is provided with a rotating bearing 24 connected to the inner wall of the fan rotor 22. Optionally, the fan rotor 22 is connected to the rotating shaft 211 of the drive motor 21 by an adapter. The fan rotor 22 and the blades 23 are integrally formed. The structural arrangement of the driving motor 21 and the fan rotor 22 reduces the space occupied by the air supply unit 100 , and the arrangement of the rotating bearing 24 ensures the rotational stability of the fan rotor 22 , thereby ensuring the overall operational stability of the portable fan.

[0169] A cover 115 is provided on the area of ​​the second inner shell 112 corresponding to the fan blades 23, and is arranged outside the fan blades 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 is provided with a rear cover 5, and the rear cover 5 is provided with an opening structure 51 for allowing airflow to enter the accommodating chamber. The cover 115 is connected to the air inlet so that after the airflow enters the air inlet, it flows directly toward the fan blades 23 and the fan rotor 22 under the guidance of the cover 115. The fan rotor 22 drives the fan blades 23 to rotate, forming a vortex air duct. The air duct formed by the cover 115, the fan blades 23 and the fan rotor 22 improves the wind guiding effect and the exhaust effect. Preferably, in this embodiment, the back cover 5 is provided with connecting strips arranged in a scattered pattern along the central axial edge region, with the gaps between the connecting strips forming the opening structure 51. Furthermore, preferably, the connecting strips are in a rearwardly convex arc shape, reducing resistance to airflow and ensuring effective air intake. In other embodiments, the back cover 5 is provided with a plurality of circular, square, or other shaped hole structures to form the opening structure 51.

[0170] Furthermore, as shown in Figures 3-2, 3-3 and 3-5, the back cover 5 is connected to the second inner shell 112 through a fixing ring 116, and the back cover 5 is clamped to the rear end of the fixing ring 116. The front end of the fixing ring 116 is connected to the third clamping assembly at the rear end of the second inner shell 112. The third clamping assembly includes a third clip 117 provided at the front end of the fixing ring 116, and a third clamping block 118 provided at the rear end of the second inner shell 112 and cooperating with the third clip 117. As shown in Figure 3-3, a cut surface is provided on the outer wall of the third clip 117 to facilitate the clamping of the third clip 117 and the third clamping block 118, thereby improving installation efficiency; in other embodiments, the third clamping assembly includes a third clamping block 118 provided at the front end of the fixing ring 116, and a third clip 117 provided at the rear end of the second inner shell 112 and cooperating with the third clamping block 118.

[0171] The portable fan further includes a power supply, which is electrically connected to the display screen 3 and the driving motor 21 .

[0172] Example 3-2, see Figures 3-6 and 3-7.

[0173] This embodiment discloses a portable fan including the air supply unit 100 described in Example 1. As shown in Figures 3-6 and 3-7, the portable fan also includes a handheld portion 200 connected to the air supply unit 100; the handheld portion 200 includes a handle 6, a wind speed adjustment knob 7 provided on the handle 6, a charging port 8, and a switch button 9; the power supply is accommodated in the handle 6, and a mounting slot for mounting the power supply is provided in the handle 6. The wind speed adjustment knob 7, charging port 8, and switch button 9 are respectively 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, and 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. When in use, the output power of the drive motor 21 is adjusted by rotating the wind speed adjustment knob 7. Driven by the drive motor 21, the fan rotor 22 drives the fan blades 23 to rotate at different speeds, thereby driving the airflow to flow from the air inlet to the air outlet at different flow rates, thereby achieving the effect of controlling the wind speed, meeting the user's personalized usage requirements in different situations, and improving the user's usage experience. Preferably, as shown in Figures 3-7, the wind speed adjustment knob 7 in this embodiment is provided on the side of the handle 6 facing the user to facilitate user operation; the charging port and the switch button are provided on the side of the handle 6 facing away from the user. In some embodiments, a dust cover can also be provided on the charging port to prevent dust, water, etc. from entering the charging port.

[0174] As shown in Figures 3-7, 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. A second connecting member 13 corresponding to the first connecting member 61 is provided at the air outlet, and the first connecting member 61 and the second connecting member 13 are connected by a first fastener 14. In other embodiments, to further enhance the stability of the connection between the handheld portion 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. A second connecting plate 15 corresponding to the first connecting plate 62 is provided at the air inlet, and 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 arranged opposite each other.

[0175] When in use, turn on the switch button 9, the display screen 3 lights up to display the working status, and rotate the wind speed adjustment knob 7 to adjust the air outlet speed.

[0176] It can be understood that in another embodiment, the portable fan can be composed of the air supply part alone, and the air supply part can also be connected to other parts that are easy to carry. For example, when the portable fan can be a neck-hanging type, the portable fan includes a curved wearable part connected to the air supply part.

[0177] Example 4, see Figures 4-1 to 4-6.

[0178] In another feasible embodiment, referring to Figures 4-1, 4-3 and 4-4, the handheld fan 101 includes: a fan body 1, a handle 2 connected to the fan body 1; a control circuit board and a control unit 21 connected to the control circuit board are provided inside the handle 2; the control unit 21 is embedded in the handle 2 and partially exposed from the handle 2; the control unit 21 includes a roller button 211 and a spring connected to the roller button, and the air volume of the handheld fan 101 is adjusted by rolling the roller button 211, and the working state of the handheld fan 101 is adjusted by pressing the roller button 211.

[0179] In a feasible embodiment, referring to Figures 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. An air volume adjustment circuit is provided on the control circuit board, and the air volume adjustment circuit is connected to the roller rotation encoder 214 to achieve infinitely fast adjustment of the air volume of the portable fan 100.

[0180] In another feasible embodiment, referring to Figures 4-1, 4-3, 4-4 and 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. An air volume adjustment circuit is provided on the control circuit board, and the air volume adjustment circuit is connected to the roller rotation encoder 214 to achieve infinitely fast adjustment of the air volume of the handheld fan 101.

[0181] The roller rotation encoder 214 is installed on the control circuit board. When the roller button 211 rolls, it drives the rotating shaft 213 to rotate around the central axis. The roller rotation encoder 214 outputs a digital signal, which is processed by the control circuit board to achieve infinite speed adjustment of the air output of the portable fan 100 and the handheld fan 101.

[0182] In another feasible embodiment, please refer to Figures 4-2 and 4-4, the rotating shaft 213 is connected to a spring (not shown), a switch control circuit is also provided on the control circuit board, and the roller button 211 is connected to the switch control circuit via a spring. Optionally, the control circuit board is arranged vertically, and a spring is provided in the contact on the control circuit board, and the spring is used to reset the roller button 211. When the roller button 211 is pressed, the switch control circuit is turned on under the action of pressure, and the handheld fan 101 starts working. At this time, the roller button 211 can be rolled to adjust the air volume of the handheld fan 101 infinitely; when the roller button 211 can be rolled to adjust the air volume of the handheld fan 101 infinitely, the roller button 211 is pressed, the switch control circuit is disconnected, and the handheld fan 101 stops working. In the above manner, the safety of the handheld fan 101 can be improved, energy consumption can be reduced, and the loss caused by accidental opening, accidental touch, and accidental touch can be reduced.

[0183] In another feasible embodiment, referring to FIG4-4 , the bearing 212 includes a main body 2121 and an annular portion 2122 located on opposite sides of the main body 2121. A receiving cavity is formed in the middle of the annular portion 2122, and the receiving cavity is used to receive the roller button 211. Optionally, the roller button 211 is a tire-shaped component, including two parallel front and rear circular end faces, and an annular circumferential surface connecting the periphery of the circular end faces, and a plurality of arc-shaped grooves are evenly distributed in the circumferential direction of the annular circumferential surface. The arc-shaped grooves are provided to facilitate the user to scroll the roller button 211, thereby improving the user experience. Optionally, the diameter of the annular portion is slightly larger than the diameter of the roller button 211, which can well protect the roller button 211 and extend the service life of the roller button 211.

[0184] In one possible embodiment, a battery compartment 22 is provided within the fan body 20, which houses a battery 221. The control circuit board is connected to the battery 221. In another possible embodiment, referring to Figures 4-1 and 4-3, a battery compartment 22 is provided within the handle 2. Optionally, the battery is rechargeable, further enhancing the convenience and portability of the portable fan 100 or handheld fan 101.

[0185] In a feasible embodiment, please refer to Figures 4-5 and 4-6, the roller rotation encoder 214 includes a first output end 2141 and a second output end 2142, the air volume regulation circuit includes a first regulation module 201 and a second regulation module 202, the first output end 2141 is connected to the first regulation module 201, the second output end 2142 is connected to the second regulation module 202, and the first regulation module 201 and the second regulation module 202 are both connected to the positive pole of the battery 221.

[0186] Further, referring to Figures 4-4, 4-5, and 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. A first output terminal 2141 of the roller encoder 214 is commonly 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, the other end of the second resistor R2 is connected to the positive terminal of the battery 221, and the other end of the first capacitor C1 is grounded. A second output terminal 2142 of the roller encoder 214 is commonly 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, the other end of the fourth resistor R4 is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is grounded. A 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 the rotation speed of the portable fan 100 and the handheld fan 101 can be infinitely controlled according to the multiple different digital signals, thereby improving the user experience.

[0187] In one embodiment, the portable fan 100 further includes an on / off button 216 located on the fan body 20. The on / off button 216 is exposed from the fan body 20 and is used to adjust the operating state of the portable fan 100. Pressing the on / off button 216 activates the portable fan 100. At this time, scrolling the scroll wheel 211 allows for infinitely variable airflow adjustment. Pressing the on / off button 216 again deactivates the portable fan 100.

[0188] In one feasible embodiment, the control circuit board is further provided with an operating state adjustment circuit, and a switch button 216 is connected to the switch control circuit, so that the operating state of the portable fan 100 can be adjusted by pressing the switch button 216. When the switch button 216 is pressed, the operating state adjustment circuit is turned on, and the portable fan 100 starts to operate. At this time, the roller button 211 can be rolled to adjust the air volume of the portable fan 100 at a variable speed. When the roller button 211 is rolled to adjust the air volume of the portable fan 100 at a variable speed, pressing the switch button 216 again disconnects the operating state adjustment circuit, and the portable fan 100 stops operating. This method can improve the safety of the portable fan 100 and reduce energy consumption.

[0189] In another feasible embodiment, referring to Figures 4-1, 4-2 and 4-4, the handheld fan 101 further includes an anti-accidental touch button 215 provided on the handle 2, the anti-accidental touch button 215 being exposed from the handle 2, and the anti-accidental touch button 215 being used to prevent the handheld fan 101 from being accidentally turned on. Optionally, the anti-accidental touch button 215 is a push button switch or a toggle switch. In another feasible embodiment, after toggling the anti-accidental touch button and pressing the roller button 211, the handheld fan 101 starts working. At this time, rolling the roller button 211 can adjust the air volume of the handheld fan 101 infinitely. By dual-activating the anti-accidental touch button 215 and pressing the roller button 211, the handheld fan 101 is prevented from being turned on after the roller button 211 is pressed by other objects, thereby further improving the safety, energy saving and environmental protection of the handheld fan 101.

[0190] In another feasible embodiment, referring to Figures 4-1, 4-2, and 4-4, the anti-accidental touch button 215 is located below the fan body 1, and the anti-accidental touch button 215 and the roller button 211 are located on opposite sides of the handle 2. Optionally, the roller button 211 and the anti-accidental touch button 215 are located below the handle 2, in a position slightly above the middle of the handle 2, which is more in line with human usage habits and improves user experience. The anti-accidental touch button 215 and the roller button 211 are arranged on opposite sides of the handle 2 to prevent the roller button 211 from being pressed by other objects and the anti-accidental touch button 215 from being accidentally activated by an object on the same side, causing the handheld fan 101 to be accidentally started.

[0191] In one possible embodiment, the surface of the fan body 20 is provided with a second opening 24 through which the roller button 211 is exposed. In another possible embodiment, referring to Figures 4-1 and 4-4 , the surface of the handle 2 is provided with a second opening 24 through which the roller button 211 is exposed. A mounting plate 241 is embedded in the second opening 24, through which the roller button 211 is exposed. Optionally, the mounting plate 241 is shaped to fit snugly with the roller button 211.

[0192] In one feasible embodiment, a first opening 23 is provided on the surface of the fan body 20 for exposing the switch button 216. In another feasible embodiment, referring to Figures 4-1 and 4-4, a first opening 23 is provided on the surface of the handle 2 for exposing the anti-accidental touch button 215. Optionally, the shape of the first opening 23 is wedged with 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, a lanyard hole 25 is further provided at the bottom of the handle 2. The lanyard hole 25 is used to install a lanyard or a lanyard decoration to facilitate the removal and placement of the handheld fan 101 while enhancing the appearance of the handheld fan 101. Optionally, the lanyard hole 25 is located on the same side of the first opening 23.

[0193] The beneficial effect of the present invention is that a control circuit board is disposed within the fan body of the portable fan, the control circuit board is connected to a control unit, and the control unit is embedded in the fan body. The control unit includes a roller button, and the roller button is used to infinitely adjust the air volume of the portable fan. In this way, the portable fan of the present invention can infinitely adjust the air volume of the portable fan and freely adjust the wind speed.

[0194] Example 5, see Figures 5-1 to 5-6.

[0195] Please refer to Figures 5-1, 5-3 and 5-4. The handheld fan 100 includes: a fan body 1, a handle 2 connected to the fan body 1; a control circuit board and a control unit 21 connected to the control circuit board are provided inside the handle 2; the control unit 21 is embedded in the handle 2 and partially exposed from the handle 2; the control unit 21 includes a roller button 211 and a spring connected to the roller button. The air volume of the handheld fan 100 is adjusted by rolling the roller button 211, and the working state of the handheld fan 100 is adjusted by pressing the roller button 211.

[0196] In one feasible embodiment, referring to Figures 5-1, 5-3, and 5-4, the control unit 21 further 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. An air volume adjustment circuit is provided on the control circuit board, and the air volume adjustment circuit is connected to the roller rotary encoder 214 to achieve infinitely fast adjustment of the air volume of the handheld fan 100. The roller rotary encoder 214 is mounted on the control circuit board. When the roller button 211 rolls, it drives the rotating shaft 213 to rotate about the central axis, and the roller rotary encoder 214 outputs a digital signal. The digital signal is processed by the control circuit board to achieve infinitely fast adjustment of the air volume of the handheld fan 100.

[0197] In a feasible embodiment, please refer to Figures 5-2 and 5-4, the rotating shaft 213 is connected to a spring (not shown), and a switch control circuit is also provided on the control circuit board, and the roller button 211 is connected to the switch control circuit via a spring. Optionally, the control circuit board is arranged vertically, and a spring is provided in the contact on the control circuit board, and the spring is used to reset the roller button 211. In another feasible embodiment, when the roller button 211 is pressed, the switch control circuit is turned on, and the handheld fan 100 starts working. At this time, rolling the roller button 211 can adjust the air volume of the handheld fan 100 infinitely; when the roller button 211 can adjust the air volume of the handheld fan 100 infinitely, pressing the roller button 211 disconnects the switch control circuit, and the handheld fan 100 stops working. In the above manner, the safety of the handheld fan 100 can be improved, energy consumption can be reduced, and losses caused by accidental opening, accidental touching, and accidental touching can be reduced.

[0198] In a feasible embodiment, referring to FIG5-4 , the bearing 212 includes a main body 2121 and an annular portion 2122 located on opposite sides of the main body 2121. A receiving cavity is formed in the middle of the annular portion 2122, and the receiving cavity is used to receive the roller button 211. Optionally, the roller button 211 is a tire-shaped component, including two parallel front and rear circular end faces, and an annular circumferential surface connecting the periphery of the circular end faces, and a plurality of arc-shaped grooves are evenly distributed in the circumferential direction of the annular circumferential surface. The arc-shaped grooves are provided to facilitate the user to scroll the roller button 211, thereby improving the user experience. Optionally, the diameter of the annular portion is slightly larger than the diameter of the roller button 211, which can well protect the roller button 211 and extend the service life of the roller button 211.

[0199] In one feasible embodiment, referring to Figures 5-1 and 5-3, a battery compartment 22 is provided inside the handle 2 for storing a battery 221. The control circuit board is connected to the battery 221. Optionally, the battery 221 is a rechargeable battery, further enhancing the convenience and portability of the handheld fan 100.

[0200] In a feasible embodiment, please refer to Figures 5-1, 5-4 and 5-5, the roller rotation encoder 214 includes a first output end 2141 and a second output end 2142, the air volume adjustment circuit includes a first adjustment module 201 and a second adjustment module 202, the first output end 2141 is connected to the first adjustment module 201, the second output end 2142 is connected to the second adjustment module 202, and the first adjustment module 201 and the second adjustment module 202 are both connected to the positive pole of the battery 221.

[0201] Further, referring to Figures 5-4, 5-5, and 5-6, 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. A first output terminal 2141 of the roller encoder 214 is commonly 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, the other end of the second resistor R2 is connected to the positive terminal of the battery 221, and the other end of the first capacitor C1 is grounded. A second output terminal 2142 of the roller encoder 214 is commonly 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, the other end of the fourth resistor R4 is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is grounded. A 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 a plurality of different digital signals, and then the rotation speed of the handheld fan 100 can be infinitely controlled according to the plurality of different digital signals, thereby improving the user experience.

[0202] In a feasible embodiment, referring to Figures 5-1, 5-2 and 5-4, the handheld fan 100 further includes an anti-accidental touch button 215 provided on the handle 2, the anti-accidental touch button 215 being exposed from the handle 2, and the anti-accidental touch button 215 being used to prevent the handheld fan 100 from being accidentally turned on. Optionally, the anti-accidental touch button 215 is a push button switch or a toggle switch. In another feasible embodiment, after toggling the anti-accidental touch button and pressing the roller button 211, the handheld fan 100 starts working. At this time, the air volume of the handheld fan 100 can be adjusted infinitely by rolling the roller button 211. By dual-activating the anti-accidental touch button 215 and pressing the roller button 211, the handheld fan 100 is prevented from being turned on after the roller button 211 is pressed by other objects, thereby further improving the safety, energy saving and environmental protection of the handheld fan 100.

[0203] In one feasible embodiment, referring to Figures 5-1, 5-2, and 5-4, the anti-accidental touch button 215 is located below the fan body 1, and the anti-accidental touch button 215 and the roller button 211 are located on opposite sides of the handle 2. Optionally, the roller button 211 and the anti-accidental touch button 215 are located below the handle 2, in a position slightly above the middle of the handle 2, which is more in line with human usage habits and improves user experience. The anti-accidental touch button 215 and the roller button 211 are arranged on opposite sides of the handle 2 to prevent the roller button 211 from being pressed by other objects and the anti-accidental touch button 215 from being accidentally activated by an object on the same side, causing the handheld fan 100 to be accidentally started.

[0204] In one feasible embodiment, referring to Figures 5-1 and 5-4 , a second opening 24 is provided on the surface of the handle 2 for exposing the roller button 211. A mounting plate 241 is embedded in the second opening 24, and the roller button 211 is exposed outside the second opening 24 through the mounting plate 241. Optionally, the mounting plate 241 is shaped to fit the roller button 211.

[0205] In one feasible embodiment, referring to Figures 5-1 and 5-2 , the surface of the handle 2 is provided with a first opening 23 through which the anti-accidental touch button 215 is exposed. Optionally, the shape of the first opening 23 is wedged with 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, a lanyard hole 25 is further provided at the bottom of the handle 2. The lanyard hole 25 is used to attach a lanyard or lanyard decoration, facilitating the removal and placement of the handheld fan 100 while enhancing its appearance. Optionally, the lanyard hole 25 is located on the same side as the first opening 23.

[0206] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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.

[0207] The beneficial effects of this embodiment are as follows: a control circuit board is disposed within the handle of the handheld fan, the control circuit board is connected to a control unit, and the control unit is embedded in the handle. The control unit includes a roller button and a spring connected to the roller button. The air volume of the handheld fan can be adjusted by rolling the roller button, and the operating state of the handheld fan can be adjusted by pressing the roller button. In this way, the handheld fan of the utility model can be turned on and off by pressing the roller button, and the wind speed of the handheld fan can be infinitely adjusted by rolling the roller button, thereby freely adjusting the air volume of the handheld fan.

[0208] Example 6-1, see Figures 6-1 to 6-10.

[0209] Please refer to Figures 6-1 to 6-10. Figure 6-1 is a structural schematic diagram of a handheld structure for a handheld fan provided in an embodiment of the present invention. Figure 6-2 is a structural schematic diagram of a mounting frame 2 and a circuit board assembly in a handheld structure for a handheld fan provided in an embodiment of the present invention. Figure 6-3 is a structural schematic diagram of a gear knob assembly 51 and a battery 4 in a handheld structure for a handheld fan provided in an embodiment of the present invention. Figure 6-4 is a structural schematic diagram of a protection switch button assembly 52 in a handheld structure for a handheld fan provided in an embodiment of the present invention. Figure 6-5 is a structural schematic diagram of a handheld portion 1 and an air supply structure 6 in a handheld structure for a handheld fan provided in an embodiment of the present invention. Figure 6-6 is a schematic structural diagram of the clamping plate 14 in a handheld structure for a handheld fan provided in an embodiment of the present invention, Figure 6-7 is a schematic structural diagram 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 the present invention, Figure 6-8 is a schematic structural diagram of the accommodating space 27 in a handheld structure for a handheld fan provided in an embodiment of the present invention, Figure 6-9 is a schematic structural diagram of the isolation plate 26 in a handheld structure for a handheld fan provided in an embodiment of the present invention, and Figure 6-10 is a schematic structural diagram of the first protrusion 22 and the second protrusion 23 in a handheld structure for a handheld fan provided in an embodiment of the present invention. A handheld structure for a handheld fan provided in Example 1 of the present invention comprises a handheld portion 1 having a hollow cavity 11, a mounting frame 2, a circuit board assembly, a battery 4, and a control mechanism. The handheld portion 1 having a hollow cavity 11, the mounting frame 2, the circuit board assembly, the battery 4, and the control mechanism are now described in detail:

[0210] For the handheld part 1 and the mounting frame 2 having the hollow cavity 11:

[0211] The handle 1 defines a first through-slot 12, which faces the gear knob assembly 51. It also defines a second through-slot 13, which faces the protective switch button assembly 52. ​​Inside the hollow cavity 11, there are clamping plates 14 positioned on either side 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 positioned 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 handle 1 enclose the hollow cavity 11. The mounting frame 2 may include a first support plate 24, a second support plate 25, a frame body 28 having a receiving space 27, and a first protrusion 22 and a second protrusion 23 respectively arranged on both sides of the frame body 28, the first protrusion 22 abuts against the first circuit board 31, 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, the second circuit board 32 is located between the second protrusion 23 and the battery 4; the first support plate 24 is clamped with the first circuit board 31, the protection switch button assembly 52 is arranged on the first support plate 24; the second support plate 25 is clamped with the second circuit board 32, the first circuit board 31 is connected to the second circuit board 32 by a wire passing through the receiving space 27, and the gear knob assembly 51 is arranged 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 wire connecting the first circuit board 31 passes through the isolation plate 26 and is connected to the second circuit board 32 .

[0212] Specifically, the handheld portion 1 may include a handheld housing located on the outside and a hollow cavity 11 located within the handheld housing. The interior of the hollow cavity 11 has space for accommodating the mounting bracket 2, the circuit board assembly, the battery 4, and the control mechanism. A first through-slot 12 and a second through-slot 13 may be respectively provided on either side of the handheld portion 1. The first through-slot 12 has space for accommodating the gear knob assembly 51, and the second through-slot 13 has space for accommodating the protection switch button assembly 52. ​​Two clamping plates 14 are located within 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 located at the bottom of the mounting bracket 2. The clamping plates 14 provide support and fixation for the mounting bracket 2. A snap groove can be provided at the other end of the clamping plate 14, and a clip that matches the snap groove can be provided on the sealing cover 15. The clip and the clip engage with each other, facilitating installation and removal of 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 and the mounting bracket 2 located at the top. The clamping plates 14, sealing cover 15, and mounting bracket 2 can limit the battery 4 on all sides, making the overall structure more compact.

[0213] It should be noted that a first protrusion 22 and a second protrusion 23 can be respectively provided at 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 set between the first protrusion 22 and the battery 4. The position of the first circuit board 31 can be constrained in the vertical direction through the first protrusion 22 and the battery 4. The first support plate 24 and the first circuit board 31 are mutually engaged. For example, a locking joint 241 is provided on the first support plate 24, and a locking groove 311 is provided on the first circuit board 31 to match the locking joint 241. The locking joint 241 on the first support plate 24 can be engaged with the locking groove 311 on the first circuit board 31; or a locking groove 311 is provided on the first support plate 24 and a locking joint 241 is provided on the first circuit board 31 to match the locking groove 311. The locking joint 241 on the first circuit board 31 can be engaged with the locking groove 311 on the first support plate 24. This facilitates installation and maintenance of the first circuit board 31. Furthermore, the frame 28 and the first support plate 24 can constrain the position of the first circuit board 31 in the horizontal direction to prevent displacement of the first circuit board 31 during use. Since the structure and principle of the mutual engagement between the second support plate 25 and the second circuit board 32 are the same as those of the mutual engagement between the first support plate 24 and the first circuit board 31, they will not be further described here. In addition, the isolation plate 26 set on the frame 28 can isolate the wires connecting the first circuit board 31 and the second circuit board 32. For example, for the wire 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. The isolation plate 26 separates the wire from the below-mentioned gear knob assembly 51, and the layout of the wire can be optimized in a limited space, while avoiding interference of the wire with the gear knob assembly 51.

[0214] For the circuit board assembly, battery 4 and control mechanism:

[0215] The circuit board assembly is disposed on the mounting frame 2, and includes a first circuit board 31 and a second circuit board 32. The first circuit board 31 is disposed on the mounting frame 2 and is connected to the protection switch button assembly 52 and the battery 4, respectively. The second circuit board 32 is disposed on the mounting frame 2 and is connected to the gear knob assembly 51 and the first circuit board 31, respectively. The second circuit board 32 and the first circuit board 31 are disposed opposite each other. The battery 4 is disposed inside the hollow cavity 11. The control mechanism includes a gear knob assembly 51, a protection switch button assembly 52, and a charging port 53. The gear knob assembly 51 is disposed on the mounting frame 2 and is connected to the battery 4 via the circuit board assembly. The gear knob assembly 51 includes a support block 511 disposed on the mounting frame 2, a knob 512, and a rotating shaft 513 rotatably mounted on the support block 511. The support block 511 defines an opening 5111, and the rotating shaft 513 extends through the knob 512. The knob 512 is located in the opening 5111 and faces the first through-slot 12. The protection switch button assembly 52 is disposed on the mounting frame 2 and is connected to the circuit board assembly. The protection switch button assembly 52 and the gear knob assembly 51 are disposed opposite each other. The charging port 53 is disposed on the mounting frame 2 and is connected to the first circuit board 31. The charging port 53 faces the second through-slot 13.

[0216] Specifically, the first circuit board 31 and the second circuit board 32 of the circuit board assembly are arranged opposite each other on the mounting frame 2. The first circuit board 31 is connected to the protection switch button assembly 52 and the battery 4 in the control mechanism, respectively. The protection switch button assembly 52 can control whether the circuit powered by the battery 4 is open or closed. For example, if the protection switch button assembly 52 is a sliding switch, when the button in the protection switch button assembly 52 is slid to one end, the circuit is open, and the fan operates. When the button in the protection switch button assembly 52 is slid to the other end, the circuit is closed, and the fan does not operate. This prevents 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 the gear knob assembly 51 and the first circuit board 31, respectively. The support block 511 in the gear knob assembly 51 is installed on the above-mentioned second support plate 25. After the rotating shaft 513 is connected to the knob 512, the rotating shaft 513 can be driven to rotate by rotating the knob 512. One end of the rotating shaft 513 can be rotatably installed on the support block 511. For example, a through hole for rotatably installing one end of the rotating shaft 513 is provided at the connection between the support block 511 and the second circuit board 32. 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 shaft 513 can contact an elastic button provided on the second circuit board 32. When the knob 512 located in the opening area 5111 is pushed toward the first circuit board 31, the knob 512 drives the other end of the shaft 513 to press the elastic button. After the pressed elastic button is connected to the second circuit board 32, the power level of the battery 4 can be checked. That is, when the knob 512 in the gear knob assembly 51 is pressed, the power level of the battery 4 can be checked. The charging port 53 can be a USB interface, which is used to charge the battery 4 after connecting to an external power source.

[0217] The present invention provides a handheld structure for a handheld fan, wherein a mounting bracket 2 and a battery 4 are arranged in a hollow cavity 11 of a handheld portion 1, a circuit board assembly is arranged in the mounting bracket 2, and a gear knob assembly 51 in a control mechanism is arranged in the mounting bracket 2. The gear knob assembly 51 is connected to the battery 4 via the circuit board assembly, and a first through slot 12 provided in the handheld portion 1 is directly opposite the gear knob assembly 51. Thus, the circuit board assembly, the gear knob assembly 51, the mounting bracket 2, and the battery 4 are all located within the hollow cavity 11 of the handheld portion 1. The speed of the fan is controlled by adjusting the circuit board assembly connected to the battery 4 via the gear knob assembly 51, which helps to reduce the space occupied by the overall structure of the handheld fan. The handheld portion 1 is easy for the operator to grasp, thereby reducing the volume and space occupied by the overall structure of the handheld fan, making it easier to carry around. This achieves the technical effect of being small in size, occupying little space, and being easy to carry around.

[0218] In order to explain in detail a handheld fan provided by the present invention, the above embodiment 1 explains in detail a handheld structure for a handheld fan. Based on the same concept of the present invention, the present application also provides a handheld fan, see embodiment 2 for details.

[0219] Example 6-2

[0220] This embodiment provides a handheld fan, comprising the 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 mentioned above.

[0221] The present invention provides a handheld fan, wherein a mounting bracket 2 and a battery 4 are arranged in a hollow cavity 11 of a handheld portion 1, a circuit board assembly is arranged on the mounting bracket 2, a gear knob assembly 51 in a control mechanism is arranged on the mounting bracket 2, the gear knob assembly 51 is connected to the battery 4 via the circuit board assembly, a first through slot 12 provided in the handheld portion 1 is directly opposite the gear knob assembly 51, and the handheld portion 1 is connected to an air supply structure 6. In this way, the circuit board assembly, the gear knob assembly 51, the mounting bracket 2, and the battery 4 are all located inside the hollow cavity 11 of the handheld portion 1, and the speed of the fan is controlled by adjusting the circuit board assembly connected to the battery 4 through the gear knob assembly 51, which helps to reduce the space occupied by the overall structure of the handheld fan. The handheld portion 1 is easy for the operator to grasp, thereby reducing the volume of the overall structure of the handheld fan and the space occupied, making it easy to carry. Thus, the technical effect of small size, small space occupied, and easy to carry is achieved.

[0222] Example 7, see Figures 7-1 to 7-8.

[0223] The utility model discloses a handheld fan, in which an air passage 111 is formed in the inner shell 11 of the air supply unit 1, and the air inlet and the air outlet are respectively connected to the two sides of the air passage 111. The fan assembly 13 is arranged in the air passage 111, and the outer shell 12 is used to cover the outside of the inner shell 11. The handheld shell 21 in the handheld part 2 is covered on the outside of the mounting mechanism, and the handheld shell 21 extends into the mounting opening 121 of the outer shell 12. The fixing member 23 passes through the outer shell 12 of the air supply unit 1 and the handheld shell 21 in sequence and is connected to the mounting mechanism. In this way, the handheld shell of the handheld part 2 and the mounting mechanism are connected to the outer shell 12 of the air supply unit 1 through the fixing member 23. The air passage 111 formed by the inner shell 11 of the air supply unit 1 can provide for the circulation of gas, which is conducive to improving the compactness of the structure and enhancing the stability and reliability during operation. Thus, the technical effects of improving compactness and improving reliability are achieved.

[0224] Please refer to Figures 7-1 to 7-8. Figure 7-1 is a schematic diagram of the structure of a handheld fan provided in an embodiment of the present invention. Figure 7-2 is a schematic diagram of the structure of a mounting bracket 221 in a handheld fan provided in an embodiment of the present invention. Figure 7-3 is a schematic diagram of the structure of a handheld shell 21 in a handheld fan provided in an embodiment of the present invention. Figure 7-4 is a schematic diagram of the structure of a control mechanism in a handheld fan provided in an embodiment of the present invention. Figure 7-5 is a schematic diagram of the structure of a mounting slot 114 in a handheld fan provided in an embodiment of the present invention. Figure 7-6 is a schematic diagram of the structure of an outer shell 12 in a handheld fan provided in an embodiment of the present invention. Figure 7-7 is a schematic diagram of the structure of a first circuit board 4 in a handheld fan provided in an embodiment of the present invention. Figure 7-8 is a schematic diagram of the structure of an inner shell 11 in a handheld fan provided in an embodiment of the present invention. A handheld fan provided in Example 1 of the present invention includes an air supply portion 1 and a handheld portion 2. The air supply portion 1 and the handheld portion 2 are now described in detail:

[0225] For the air supply unit 1 and the handheld unit 2:

[0226] The air supply unit 1 includes an inner shell 11, an outer shell 12, and a fan assembly 13. The inner shell 11 is formed with an air passage 111, an air inlet connected to one side of the air passage 111, and an air outlet connected to 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 can be provided with a limit plate 112 and a baffle 113. The limit plate 112 and the baffle 113 enclose a mounting groove 114, and one end of the handheld housing 21 is inserted into the mounting groove 114. The handheld unit 2 includes a handheld housing 21, a mounting mechanism, and a fixing member 23. The handheld housing 21 is covered on the outside of the mounting mechanism and inserted 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 frame 221, a clamping plate 222, and a sealing cover 223. The mounting frame 221 is connected to the fixing member 23; the clamping plate 222 is connected to the mounting frame 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 frame 221 enclose a space for placing the battery. The first connecting member 115 is provided on the inner shell 11, and the second connecting member 2211 is provided in the mounting mechanism. The fixing member 23 extends through the first connecting member 115 and the second connecting member 2211.

[0227] 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 is covered on 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 shell 21 in the handheld part 2 and the mounting bracket 221 in the mounting mechanism. A limit plate 112 and a baffle 113 are provided in the inner shell 11 at a position opposite the mounting opening 121. A mounting groove 114 is formed between the limit plate 112 and the baffle 113. The mounting groove 114 can accommodate one end of the handheld shell 21 to be inserted. The mounting groove 114 can limit the position of one end of the handheld shell 21.

[0228] It should be noted that one end of the handheld housing 21 in the handheld portion 2 is inserted into the mounting opening 121 and then into the mounting slot 114. In the mounting mechanism, a first connecting member 115 may be provided on the mounting bracket 221, and a second connecting member 2211 may be provided at a position on the inner housing 11 corresponding to the mounting bracket 221. A fixing member 23, which may include a bolt, passes through the outer housing 12, the handheld housing 21, and the second connecting member 2211 provided on the inner housing 11 before being connected to the first connecting member 115 provided on the mounting bracket 221. Two clamping plates 222 may be provided on either side of the handheld housing 21. The clamping plates 222 are connected to the mounting bracket 221. The sealing cover 223 may be detachably connected to the clamping plates 222, for example by providing a snap joint on the sealing cover 223 and a snap groove 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 frame 221 .

[0229] The handheld fan provided in this embodiment also 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 protection switch button assembly 32, and a charging port 33. The gear knob assembly 31 is mounted on the mounting mechanism. The handheld housing 21 defines a first through-slot 211 facing the gear knob assembly 31 and a second through-slot 212 facing the protection switch button assembly 32. The first circuit board 4 is mounted on the mounting mechanism and connected to the gear knob assembly 31. The protection switch button assembly 32 is mounted on the mounting bracket 221, with the protection switch button assembly 32 and the gear knob assembly 31 positioned opposite each other. The second circuit board 41 is mounted on the mounting bracket 221 and connected to the protection switch button assembly 32 and the first circuit board 4, respectively. The charging port 33 is mounted 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 in the inner housing 11 , and the third circuit board 42 is connected to the second circuit board 41 .

[0230] Specifically, a first circuit board 4 and a second circuit board 41 are arranged opposite 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 respectively 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 can drive the fan blades to rotate. The protection switch button assembly 32 can control whether the circuit powered by the battery is open or closed. For example, if the protection switch button assembly 32 is a sliding switch, when the button in the protection switch button assembly 32 is slid to one end, the circuit is open, and the motor in the fan assembly 13 operates to drive the fan blades to rotate. When the button in the protection switch button assembly 32 is slid to the other end, the circuit is open, and the motor in the fan assembly 13 does not operate and the fan blades do not rotate. This prevents the operator from accidentally turning on the fan by accidentally touching the gear knob assembly 31. The gear knob assembly 31 can be used to adjust the speed of the fan blades connected to the third circuit board 42 to control the wind speed. For example, rotating the knob in the gear knob assembly 31 can adjust the fan gear, and pressing the knob in the gear knob assembly 31 can check the battery level. The charging port 33 can be a USB port and is used to charge the battery after connecting to an external power source.

[0231] The utility model provides a handheld fan, in which an air passage 111 is formed in the inner shell 11 of the air supply part 1, and the air inlet and the air outlet are respectively connected to the two sides of the air passage 111. The fan assembly 13 is arranged in the air passage 111, and the outer shell 12 is used to cover the outside of the inner shell 11. The handheld shell 21 in the handheld part 2 is covered on the outside of the mounting mechanism, and the handheld shell 21 extends into the mounting port 121 of the outer shell 12. The fixing member 23 passes through the outer shell 12 of the air supply part 1 and the handheld shell 21 in sequence and is connected to the mounting mechanism. In this way, the handheld shell of the handheld part 2 and the mounting mechanism are connected to the outer shell 12 of the air supply part 1 through the fixing member 23. The air passage 111 formed by the inner shell 11 of the air supply part 1 can provide for the circulation of gas, which is conducive to improving the compactness of the structure and enhancing the stability and reliability during operation. Thereby, the technical effects of improving compactness and improving reliability are achieved.

[0232] Example 8-1, see Figures 8-1 to 8-11.

[0233] The utility model discloses an air supply device for a handheld fan. An air passage 11 is formed through an inner shell 1. Both sides of the air passage 11 are connected to an air inlet 23 and an air outlet 24, respectively. At least a portion of a fan assembly 3 is disposed in the air passage 11. An outer shell 2 is disposed outside the inner shell 1. One side of a wiring opening 12 of the inner shell 1 faces the electrical connection portion of the fan assembly 3, and the other side of the wiring opening 12 faces the electrical connection portion of a handheld fan 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. In this way, the wiring opening 12 of the inner shell 1 allows wires connected to the electrical connection portion of the fan assembly 3 to enter and exit. The wires connected to the electrical connection portion of the fan assembly 3 pass through the wiring opening 12 at a position facing the electrical connection portion of the handheld fan 5, and then are connected to the electrical connection portion of the handheld fan 5. This helps to reduce the length of the wires, enhance durability, and improve the aesthetics of the wiring. Thereby achieving the technical effect of improving the stability of routing, enhancing the aesthetics of routing and enhancing durability.

[0234] Please refer to Figures 8-1 to 8-11. Figure 8-1 is a structural schematic diagram of an air supply device of a handheld fan provided in an embodiment of the present invention. Figure 8-2 is a structural schematic diagram of a mounting frame 6 in an air supply device of a handheld fan provided in an embodiment of the present invention. Figure 8-3 is a structural schematic diagram of a handheld portion 5 in an air supply device of a handheld fan provided in an embodiment of the present invention. Figure 8-4 is a structural schematic diagram of a wiring opening 12 in an air supply device of a handheld fan provided in an embodiment of the present invention. Figure 8-5 is a structural schematic diagram of a wire groove 21 in an air supply device of a handheld fan provided in an embodiment of the present invention. Figure 8-6 is a structural schematic diagram of a handheld fan provided in an embodiment of the present invention. Schematic diagram of the structure of the wire groove 21 in the air supply device of the fan. Figure 8-7 is a schematic diagram of the structure of the gear knob assembly 71 and the protection switch button assembly 72 in the air supply device of a handheld fan provided in an embodiment of the present invention. Figure 8-8 is a schematic diagram of the structure of the inner shell 1 and the outer shell 2 in the air supply device of a handheld fan provided in an embodiment of the present invention. Figure 8-9 is a schematic diagram of the structure of the air inlet 23 and the air outlet 24 in the air supply device of a handheld fan provided in an embodiment of the present invention. Figure 8-10 is a partial enlarged structural diagram of point A in Figure 8-9. Figure 8-11 is a schematic diagram of the structure of the fan assembly 3 in the air supply device of a handheld fan provided in an embodiment of the present invention. The air supply device of a handheld fan provided in embodiment 1 of the present invention includes an inner shell 1, an outer shell 2 and a fan assembly 3. The inner shell 1, the outer shell 2 and the fan assembly 3 are now described in detail:

[0235] For the inner shell 1, fan assembly 3 and outer shell 2:

[0236] The inner housing 1 is formed with 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 housing 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 portion 5 of the handheld fan. The electrical connection portion of the fan assembly 3 is electrically connected to the electrical connection portion of the handheld portion 5 via a wire passing through the wiring opening 12. The handheld portion 5 includes a handheld portion 5 having a mounting opening 4. The handheld portion 5 is connected to the outer housing 2, and the mounting opening 4 faces the other side of the wiring opening 12. The handheld fan air supply device provided in Example 1 of the present invention may further include a mounting bracket 6 disposed on the handheld portion 5, a second circuit board 73, and a gear knob assembly 71. At least a portion of the mounting bracket 6 is disposed within the mounting opening 4 and is connected to the inner housing 1. The mounting bracket 6 includes a receiving space 61 for wiring. The electrical connection portion of the handheld portion 5 includes a first circuit board 7, which is disposed on the mounting bracket 6 and plugs into the electrical connection portion of the fan assembly 3 via wiring. A second circuit board 73 is disposed on the mounting bracket 6 and plugs into the first circuit board 7 via wiring. The gear knob assembly 71 is disposed on the mounting bracket 6 and is connected to the second circuit board 73. The second circuit board 73 and the first circuit board 7 are disposed opposite each other. The outer housing 2 is configured to cover the exterior of the inner housing 1. A baffle 22 is disposed on the inner housing 1, and the baffle 22 and the inner housing 1 enclose a wire channel 21. At least a portion of the first circuit board 7 is disposed in the wire accommodating groove 21 .

[0237] Specifically, the air passage 11 formed within 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 is disposed on the exterior of the inner shell 1. The inner shell 1 is provided with a wiring opening 12 for passing wires. The two sides of the wiring opening 12 are respectively opposite the electrical connection portion of the fan assembly 3 and the electrical connection portion of the handheld fan 5. The electrical connection portion of the fan assembly 3 can be a circuit board connected to the fan motor. The wires connected to the circuit board pass through the wiring opening 12 and are connected to the first circuit board 7 of the electrical connection portion of the handheld fan 5. The mounting opening 4 of the handheld portion 5 faces the wiring opening 12, and the accommodating space 61 of the mounting frame 6 communicates with the mounting opening 4 of the handheld portion 5. The first circuit board 7 and the second circuit board 73 are arranged opposite each other on the mounting frame 6. The wires passing through the wiring opening 12 can be plugged into the first circuit board 7 disposed on the mounting frame 6 after passing through the mounting opening 4 of the handheld portion 5. For example, one end of the wire passing through the wiring opening 12 can be plugged into the first circuit board 7 via a plug connector, thereby facilitating the connection or disconnection of the wires and the first circuit board 7. The second circuit board 73 is plugged into the first circuit board 7 via wires, such as when the second circuit board 73 is connected to the plug connector connected to the first circuit board 7 via wires, thereby facilitating the connection or disconnection of the second circuit board 73 and the first circuit board 7. The gear knob assembly 71, connected to the second circuit board 73, can be used to adjust the speed of the fan blades in the fan assembly 3, thereby controlling the wind speed. For example, rotating the knob in the gear knob assembly 71 adjusts the fan gear; pressing the knob in the gear knob assembly 71 allows the battery level of the battery 8 to be checked. A baffle 22 is provided near the handle 5 in the inner housing 1. The diameter of the inner housing 1 gradually increases from the air inlet 23 toward the air outlet 24, thereby forming an inwardly concave space at the end of the inner housing 1 near the air inlet 23. The baffle 22 can be arranged in the inwardly recessed space, and the inner shell 1 and the baffle 22 can be enclosed to form a wire accommodating groove 21. A portion of the first circuit board 7 can be inserted into the interior of the wire accommodating groove 21, and the interior of the wire accommodating groove 21 has a space capable of accommodating the wires connected to the first circuit board 7; or the entire first circuit board 7 is located outside the wire accommodating groove 21, a portion of the wires connected to the first circuit board 7 is located inside the wire accommodating groove 21, and the other portion of the wires extends to the outside of the wire accommodating groove 21 and is connected to the first circuit board 7, which can improve the utilization of space.

[0238] The handheld fan air supply device provided in the first embodiment of the present invention 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 portion 5 and is plugged into the first circuit board 7 via a wire.

[0239] Specifically, the battery 8 can be installed in the handheld portion 5 and connected to the first circuit board 7 via a wire. The battery 8 can power the fan assembly 3. The protection switch button assembly 72, which is electrically connected to the first circuit board 7, can control whether the circuit powered by the battery 8 is open or closed. If the protection switch button assembly 72 is a sliding switch, when the button in the protection switch button assembly 72 is slid to one end, the circuit is open, and the motor in the fan assembly 3 operates to drive the fan blades to rotate. When the button in the protection switch button assembly 72 is slid to the other end, the circuit is closed, and the motor in the fan assembly 3 does not operate and the fan blades do not rotate. This can prevent the operator from accidentally turning on the fan by accidentally touching the gear knob assembly 71.

[0240] The utility model provides an air supply device for a handheld fan, wherein an air passage 11 is formed through an inner shell 1, and both sides of the air passage 11 are connected to an air inlet 23 and an air outlet 24, respectively. At least a portion of a fan assembly 3 is disposed in the air passage 11, and an outer shell 2 is disposed outside the inner shell 1. One side of a wiring opening 12 of the inner shell 1 faces the electrical connection portion of the fan assembly 3, and the other side of the wiring opening 12 faces the electrical connection portion of a handheld fan 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. In this way, the wiring opening 12 of the inner shell 1 allows for the entry and exit of wires connected to the electrical connection portion of the fan assembly 3. The wires connected to the electrical connection portion of the fan assembly 3 pass through the wiring opening 12 at a position facing the electrical connection portion of the handheld fan 5, and are then connected to the electrical connection portion of the handheld fan 5. This helps to reduce the length of the wires, enhance durability, and improve the aesthetics of the wiring. Thereby achieving the technical effect of improving the stability of routing, enhancing the aesthetics of routing and enhancing durability.

[0241] In order to explain in detail a handheld fan provided by the present invention, the above embodiment 1 explains in detail an air supply device of a handheld fan. Based on the same concept of the present invention, the present application also provides a handheld fan, see embodiment 2 for details.

[0242] Example 8-2, see Figures 8-1 to 8-11.

[0243] A second embodiment of the present invention provides a handheld fan, including the air supply device of the handheld fan.

[0244] The utility model provides a handheld fan, wherein an air passage 11 is formed through an inner shell 1, and both sides of the air passage 11 are connected to an air inlet 23 and an air outlet 24, respectively. At least a portion of a fan assembly 3 is disposed in the air passage 11, and an outer shell 2 is disposed outside the inner shell 1. One side of a wiring opening 12 of the inner shell 1 faces the electrical connection portion of the fan assembly 3, and the other side of the wiring opening 12 faces the electrical connection portion of a handheld portion 5 of the handheld fan. The electrical connection portion of the fan assembly 3 is electrically connected to the electrical connection portion of the handheld portion 5 via a wire passing through the wiring opening 12. In this way, the wiring opening 12 of the inner shell 1 allows for the entry and exit of wires connected to the electrical connection portion of the fan assembly 3. The wires connected to the electrical connection portion of the fan assembly 3 pass through the wiring opening 12 at a position facing the electrical connection portion of the handheld portion 5 of the handheld fan, and are then connected to the electrical connection portion of the handheld portion 5 of the handheld fan. This helps to reduce the length of the wires, enhance durability, and improve the aesthetics of the wiring. Thereby achieving the technical effect of improving the stability of routing, enhancing the aesthetics of routing and enhancing durability.

[0245] Example 9-1, see Figures 9-1 to 9-6.

[0246] The utility model discloses an air supply mechanism of a handheld fan, in which the two sides of an air passage 11 formed by an inner shell 1 are respectively connected to an air inlet 12 and an air outlet 13, a fan assembly 3 is arranged in the air passage 11, and an outer shell 2 is covered on the outside of the inner shell 1 and is slidably connected to the inner shell 1 along a first axial direction, and the first axial direction is the direction from the air inlet 12 to the air outlet 13. In this way, during the assembly process, the outer shell 2 is pushed to be covered on the outside of the inner shell 1 along the first axial direction, so that the sliding cover of the outer shell 2 is arranged on the inner cover. In the process of requiring maintenance, the outer shell 2 is slidably separated from the inner shell 1, so that the outer shell 2 is easy to disassemble. This facilitates assembly and maintenance, helps to improve assembly efficiency, and enhances the convenience of maintenance. Thereby, the technical effects of high assembly efficiency and easy maintenance are achieved.

[0247] Please refer to Figures 9-1 to 9-6. Figure 9-1 is a structural schematic diagram of the air supply mechanism of a handheld fan provided in an embodiment of the present invention. Figure 9-2 is a structural schematic diagram of the shell 16 and the support frame 17 in the air supply mechanism of a handheld fan provided in an embodiment of the present invention. Figure 9-3 is a structural schematic diagram of the limit strip 21 in the air supply mechanism of a handheld fan provided in an embodiment of the present invention. Figure 9-4 is a structural schematic diagram of the air outlet 13 in the air supply mechanism of a handheld fan provided in an embodiment of the present invention. Figure 9-5 is a structural schematic diagram of the air inlet 12 in the air supply mechanism of a handheld fan provided in an embodiment of the present invention. Figure 9-6 is a structural schematic diagram of the sleeve 22 and the air inlet cover 23 in the air supply mechanism of a handheld fan provided in an embodiment of the present invention. The air supply mechanism of a handheld fan provided in Example 1 of the present invention includes an inner shell 1, an outer shell 2 and a fan assembly 3. The inner shell 1, the outer shell 2 and the fan assembly 3 are respectively described in detail below:

[0248] For the inner shell 1:

[0249] An air passage 11, an air inlet 12 connected to one side of the air passage 11, and an air outlet 13 connected to the other side of the air passage 11 are formed in the inner shell 1. The inner shell 1 includes a shell body 16 and a plurality of support frames 17 provided on the shell body 16, and the support frames 17 are slidably connected to the outer shell 2 described below. A limiting groove 14 matching the limiting strip 21 described below can also be provided on the support frame 17 of the inner shell 1. The shell body 16 of the inner shell 1 is gradually expanding in the direction from the air inlet 12 toward the air outlet 13, and a plurality of the support frames 17 are provided at one end of the shell body 16 close to the air inlet 12, and the plurality of the support frames 17 are distributed at equal intervals.

[0250] Specifically, the inner shell 1 may include a shell 16 and a plurality of support frames 17 arranged on the shell 16. The shell 16 is gradually expanded from the air inlet 12 toward the air outlet 13, that is, the inner diameter of the shell 16 at the end near the air inlet 12 is smaller than the inner diameter of the shell 16 at the end near the air outlet 13. The air passage 11 formed inside the shell 16 in the inner shell 1 is used for the circulation of gas. After the gas enters the air passage 11 from the air inlet 12, the gas entering the air passage 11 is discharged from the air outlet 13. A limit strip 21 is provided inside the sleeve 22 in the outer shell 2, and a limit groove 14 matching the limit strip 21 is provided on the shell 16 in the inner shell 1. The limit groove 14 is concavely formed on the surface of the shell 16 in the inner shell 1 toward the air passage 11. The internal space of the limit groove 14 can accommodate the limit strip 21, so that the limit strip 21 can be embedded in the limit groove 14. The snap-fitting groove 15 can be set on the support frame 17 of the inner shell 1, and the support frame 17 can provide support for the sleeve 22 of the outer shell 2. At the same time, the snap-fitting joint 24 set on the air inlet cover 23 of the outer shell 2 is snapped with the snap-fitting groove 15, so that after the snap-fitting joint 24 of the air inlet cover 23 in the outer shell 2 is snapped into the snap-fitting groove 15, the air inlet cover 23 in the outer shell 2 and the support frame 17 of the inner shell 1 are connected to each other, which also facilitates the removal of the outer shell 2 from the inner shell 1.

[0251] For the housing 2 and fan assembly 3:

[0252] The outer shell 2 is covered on the outside of the inner shell 1, and the outer shell 2 is slidably connected to the inner shell 1 along a first axial direction, and the first axial direction is the direction from the above-mentioned air inlet 12 to the above-mentioned air outlet 13. A limiting strip 21 matching the above-mentioned limiting groove 14 is provided on the outer shell 2, and the limiting groove 14 extends along the first axial direction. The limiting strip 21 can be slidably provided in the limiting groove 14. The number of the limiting strips 21 and the number of the limiting grooves 14 are both multiple, and the multiple limiting strips 21 and the multiple limiting grooves 14 are provided in a one-to-one correspondence, and each of the limiting strips 21 is embedded in the corresponding limiting groove 14. The outer shell 2 includes a sleeve 22 and an air inlet cover 23, the sleeve 22 is covered on the inner shell 1, the limiting strip 21 is provided on the sleeve 22, the air inlet cover 23 is detachably connected to the inner shell 1, and the air inlet cover 23 is connected to the sleeve 22. The inner shell 1 is provided with a snap-in slot 15, and the air inlet cover 23 is provided with a snap-in joint 24 corresponding to the snap-in slot 15. The snap-in joint 24 and the snap-in slot 15 are snap-in engaged with each other. The snap-in joint 24 is located between the sleeve 22 and the inner shell 1 and is distributed along the first axial direction. The number of snap-in joints 24 and the number of snap-in slots 15 are both multiple, and the multiple snap-in joints 24 and the multiple snap-in slots 15 are provided in a one-to-one correspondence, and the multiple snap-in joints 24 are distributed evenly spaced. The fan assembly 3 is disposed in the air passage 11.

[0253] Specifically, the interior of the outer shell 2 has a space for accommodating the inner shell 1. The outer shell 2 may include a sleeve 22 and an air inlet cover 23. A limiting strip 21 is provided on the inner wall of the sleeve 22 in the outer shell 2 close to the inner shell 1. The limiting strip 21 is aligned with the limiting groove 14 provided on the inner shell 1. When the sleeve 22 in the outer shell 2 is slidably inserted from one end of the inner shell 1, the limiting strip 21 will be inserted from one end opening 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, driving the sleeve 22 in the outer shell 2 to move along the length extension direction of the limiting groove 14 on the inner shell 1.

[0254] 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 the 2 limiting grooves 14 are parallel to each other, so that the 2 limiting strips 21 on the sleeve 22 in the outer shell 2 will slide along the corresponding limiting grooves 14 respectively. After the sleeve 22 in the outer shell 2 is installed in the inner shell 1, the 2 limiting strips 21 respectively embedded in the limiting grooves 14 will be limited from both sides of the sleeve 22 in the outer shell 2, which is beneficial to improve the firmness of the sleeve 22 in the outer shell 2 and facilitate the sliding installation of the sleeve 22 in the outer shell 2 on the inner shell 1. The fan assembly 3 includes a motor and fan blades driven by the motor. The motor can be installed within the air passage 11 of the inner housing 1, supported by the housing 16 of the inner housing 1. The motor's shaft drives the fan blades to rotate, driving air into the air passage 11 through the air inlet 12. The air entering the air passage 11 is then discharged through the air outlet 13. The outer housing 2, when connected to the handle 4, also makes it easier for the operator to grasp and carry.

[0255] The utility model provides an air supply mechanism for a handheld fan, wherein the two sides of an air passage 11 formed by an inner shell 1 are respectively connected to an air inlet 12 and an air outlet 13, a fan assembly 3 is arranged in the air passage 11, and an outer shell 2 is covered on the outside of the inner shell 1 and is slidably connected to the inner shell 1 along a first axial direction, wherein the first axial direction is the direction from the air inlet 12 to the air outlet 13. In this way, during the assembly process, the outer shell 2 is pushed to be covered on the outside of the inner shell 1 along the first axial direction, so that the sliding cover of the outer shell 2 is arranged on the inner cover. In the process of requiring maintenance, the outer shell 2 is slidably separated from the inner shell 1, so that the outer shell 2 is easy to disassemble. This facilitates assembly and maintenance, helps to improve assembly efficiency, and enhances the convenience of maintenance. Thus, the technical effects of high assembly efficiency and easy maintenance are achieved.

[0256] In order to explain in detail a handheld fan provided by the present invention, the above embodiment 1 explains in detail an air supply mechanism of a handheld fan. Based on the same concept of the present invention, the present application also provides a handheld fan, see embodiment 2 for details.

[0257] Example 9-2

[0258] A second embodiment of the present invention provides a handheld fan, including the air supply mechanism of the handheld fan.

[0259] The utility model provides a handheld fan, in which the two sides of the air passage 11 formed by the inner shell 1 are respectively connected to the air inlet 12 and the air outlet 13, the fan assembly 3 is arranged in the air passage 11, and the outer shell 2 is covered on the outside of the inner shell 1 and is slidably connected to the inner shell 1 along the first axial direction, and the first axial direction is the direction from the air inlet 12 to the air outlet 13. In this way, during the assembly process, the outer shell 2 is pushed to be covered on the outside of the inner shell 1 along the first axial direction, so that the sliding cover of the outer shell 2 is arranged on the inner cover. In the process of requiring maintenance, the outer shell 2 is slidably separated from the inner shell 1, so that the outer shell 2 is easy to disassemble. This facilitates assembly and maintenance, helps to improve assembly efficiency, and enhances the convenience of maintenance. Thereby, the technical effects of high assembly efficiency and easy maintenance are achieved.

[0260] Example 10, see Figures 10-1 to 10-9.

[0261] Please refer to Figures 10-1 to 10-9, which are used to solve the problem that when a handheld fan is in use, the swing caused by the rotation of the fan blades at high speed will generate vibration and noise. The utility model provides a handheld fan. Please refer to Figure 10-1, which is a schematic diagram of a handheld fan provided by an embodiment of the utility model, including an air supply part 10 and a handheld part 20. Please refer to Figure 10-2, which is an exploded schematic diagram of a handheld fan provided by an embodiment of the utility model. The air supply part 10 includes a shell 11, an air inlet cover 12 detachably connected to the shell 11, and a motor 13 arranged in the shell 11, a motor shaft 131 rotatable relative to the motor 13 is provided in the shaft hole of the motor 13, and fan blades 15 are connected to the top of the motor shaft 131. A shock-absorbing spring 132 is provided between the motor 13 and the fan blades 15, and the shock-absorbing spring 132 is sleeved on the motor shaft 131.

[0262] Further, please refer to Figure 10-3, which is a schematic diagram of an air inlet hood provided in an embodiment of the present invention, wherein the air inlet hood 12 includes an air inlet plate 121, a first side wall 122 connected to the air inlet plate 121 and wound around a preset axis, and a second side wall 123 wound around the outer periphery of the first side wall 122. Please refer to Figure 10-4, which is a schematic diagram of the formation of an air duct provided in an embodiment of the present invention, wherein an air duct 16 is formed between the first side wall 122 and the second side wall 123, and the minimum inner diameter of the second side wall 123 is greater than the maximum outer diameter of the first side wall 122. Not only can the air duct width between the second side wall 123 and the first side wall 122 be guaranteed, thereby ensuring the air outlet area, but also the wind resistance of the second side wall 123 can be reduced, and the wind in the air duct can be properly guided, thereby having a higher air outlet efficiency and making the air outlet smoother.

[0263] Specifically, in an embodiment of the present invention, when a user uses the handheld fan, the fan blades 15 rotate under the drive of the motor 13, guiding the wind from the air inlet cover 12 to the space between the first side wall 122 and the second side wall 123 and blowing it out from the side of the air outlet. The user can hold the handheld fan to blow the wind to the part that needs to be cooled, thereby achieving the purpose of rapid cooling and improving human comfort.

[0264] Further, please refer to Figure 10-5, which is a schematic diagram of a fan blade provided in an embodiment of the present invention. The fan blade 15 includes a conical cavity 151 and a blade 152 arranged on the outside of the conical cavity 151. The blade 152 is in a diagonal flow shape, and a diagonal flow duct 153 is formed between two adjacent blades 152. The diagonal flow duct 153 is used to guide the wind of the air inlet cover 12 to the air duct 16 space formed between the first side wall 122 and the second side wall 123, which can reduce the wind hitting the inner wall of the cover, reduce wind loss, and improve the air outlet efficiency. In the embodiment of the present invention, the blade 152 of the handheld fan is preferably in a diagonal flow shape, which can make the handheld fan have a larger air volume, less noise, and a more compact structure, which is convenient for handholding and carrying.

[0265] Further, please refer to Figure 10-6, which is a bottom view of an air supply part provided in an embodiment of the present utility model. The motor 13 is provided with a motor bearing 14 on the outer sleeve, and the motor bearing 14 is arranged in the conical cavity 151. The setting of the motor bearing 14 ensures the stability of the motor 13 during high-speed rotation, thereby ensuring the overall operating stability of the handheld fan.

[0266] Further, please refer to Figure 10-7, which is a schematic diagram of an integrally formed motor shaft and fan blades provided in an embodiment of the present invention. In the embodiment of the present invention, the motor shaft 131 and the fan blades 15 are integrally formed, and a metal ring 17 is fixed between the motor shaft 131 and the fan blades 15. The metal ring 17 passes through the motor shaft 131 to fix the motor shaft 131 and the fan blades 15. The integrally formed structure of the fan blades 15 and the motor shaft 131 effectively reduces the space occupied by the air supply unit 10.

[0267] Further, please refer to Figure 10-8, which is a schematic diagram of a shock-absorbing spring provided in an embodiment of the present invention. In the embodiment of the present invention, the shock-absorbing spring 132 is detachably connected to the motor shaft 131, so that the shock-absorbing spring 132 can be replaced after being damaged. In addition, since the shock-absorbing strength required at different positions is different, the inner diameter of the spring and the spacing between adjacent turns of the shock-absorbing spring 132 are different.

[0268] Specifically, the spring inner diameter 1321 of the shock-absorbing spring 132 at the end away from the motor 13 is larger than the spring inner diameter 1322 of the shock-absorbing spring 132 at the end close to the motor 13, and the spacing 1323 between adjacent turns of the shock-absorbing spring 132 at the end away from the motor 13 is smaller than the spacing 1324 between adjacent turns of the shock-absorbing spring 132 at the end close to the motor 13.

[0269] Further, please refer to Figure 10-9, which is a connection diagram of an air supply part and a hand-held part provided in an embodiment of the present utility model. The air supply part 10 is provided with a first connecting member 18, and the hand-held part 20 is provided with a second connecting member 21. The air supply part 10 and the hand-held part 20 are connected by a fixing member 22, and the fixing member 22 passes through the first connecting member 18 and the second connecting member 21 to connect the air supply part 10 and the hand-held part 20. For example, the fixing member 22 can be a screw, or it can be other fixing members 22 for connecting the air supply part 10 and the hand-held part 20. Here, the embodiment of the present utility model does not impose further restrictions.

[0270] The present invention provides a handheld fan, comprising an air supply unit and a handheld unit. The air supply unit comprises a housing, an air inlet cover detachably connected to the housing, and a motor disposed within the housing. A motor shaft rotatable relative to the motor is disposed within the motor's shaft hole. Fan blades are connected to the top of the motor shaft. A shock-absorbing spring is disposed between the motor and the fan blades, and the shock-absorbing spring is sleeved on the motor shaft. The handheld fan provided by the present invention can reduce the vibration and noise generated by the swinging of the fan blades when the motor rotates at high speeds through the shock-absorbing spring, thereby increasing the overall comfort of the user when using the handheld fan and providing a better user experience.

[0271] Example 11, see Figures 11-1 to 11-6.

[0272] As shown in FIG11-1 , a handheld fan provided by an embodiment of the present invention includes an air supply portion 100 , a handheld portion 200 and an air supply assembly 300 , wherein the handheld portion 200 is connected to the air supply portion 100 .

[0273] As shown in FIG11-2 , which is an exploded view of a handheld fan provided in this embodiment, the air supply unit 100 includes an air inlet cover 110 .

[0274] As shown in Figure 11-3, a three-dimensional diagram of an air inlet cover 110 of a handheld fan provided in this embodiment, 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 supply assembly 300, and a first accommodating cavity 120 is provided in the air supply portion 100.

[0275] Figure 11-4 is a cross-sectional view of the handheld fan of this embodiment along the AA section line direction, and Figure 11-5 is a three-dimensional view of the air supply assembly 300 of the handheld fan provided in this embodiment in a certain direction. The air supply assembly 300 is arranged in the first accommodating cavity 120, and the first accommodating cavity 120 includes an air guide cone 320 and a fan blade 310 arranged on the air guide cone 320. There is a first gap between the air guide cone 320 and the air guide portion 111.

[0276] Specifically, the air inlet cover body 112 can be any component that can cooperate with the air guide portion 111 to guide air. For example, the air inlet cover body 112 can be a component for guiding air, such as an air guide plate or air guide holes. The air inlet cover body 112 can also be a base structure for supporting the air guide portion 111 of the air inlet cover 110, thereby improving the overall structural stability of the air inlet cover 110. Therefore, the structure of the air inlet cover body 112 is not specifically limited here. Those skilled in the relevant art can configure the structure of the air inlet cover body 112 according to specific needs in specific applications.

[0277] Specifically, the air supply assembly 300 can be a fan module, and the air guide cone 320 can be driven to rotate by a motor, so that the fan blades 310 set on the air guide cone 320 can also rotate along with the air guide cone 320, and then the gas entering the first accommodating chamber 120 through the air inlet cover 110 can be delivered out of the air supply part 100 as the fan blades 310 rotate.

[0278] It can be understood 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 arranged around a certain axial ring, and the inner diameter of the side wall gradually decreases or increases from one end to the other.

[0279] Specifically, the fan blades 310 may be oblique flow blades, so that the gas flows along the surface of the air guide cone 320 and along the air duct between adjacent fan blades 310 .

[0280] Specifically, the hand-held portion 200 can be any structural component used to hold a fan, which is not specifically limited here.

[0281] Thus, when there is no gap between the air supply assembly 300 and the air guide portion 111 of the air inlet cover 110 extending toward the air supply assembly 300, the airflow entering from the air inlet cover 110 will form flocculation, causing the flowing air to interfere with each other and generate a large amount of noise. Therefore, the present invention provides a gap between the air guide cone 320 equipped with the fan blades 310 and the air guide portion 111, thereby reducing the flocculation generated by the airflow entering from the air inlet cover 110, thereby reducing the mutual interference between the flowing air and reducing the noise generated by the interference of the flowing air.

[0282] In an optional implementation, as shown in FIG11-4 , the distance of the first gap is greater than 1 mm and less than 14 mm.

[0283] It is understood that by providing a gap between the air guide cone 320 and the air guide portion 111, the turbulence between the air guide cone 320 and the air guide portion 111 can be effectively reduced. However, if the gap between the air guide cone 320 and the air guide portion 111 is designed to be too large, the air duct will be too long, thereby increasing the air supply time from the air inlet cover 110 to the air outlet, and thus reducing the air supply efficiency of the fan. Therefore, the gap between the air guide cone 320 and the air guide portion 111 is designed to be between 1 mm and 14 mm, so that the fan can effectively reduce turbulence while maintaining a certain air supply efficiency, thereby reducing the noise generated by the fan.

[0284] In an optional implementation, as shown in FIG. 11-4 and FIG. 11 -5 , the fan blade 310 is located between the end surfaces at both ends of the wind guide cone 320 .

[0285] It can be understood that the fan blade 310 is located between the end faces of the wind guide cone 320, which can avoid the fan blade 310 extending beyond the end faces of the wind guide cone 320, resulting in obstacles between the wind guide cone 320 and the wind guide part 111, thereby causing flocculation between the wind guide cone 320 and the wind guide part 111, increasing the noise generated by the fan.

[0286] In an optional implementation, as shown in Figure 11-3, the air guide portion 111 is a column, one end of the air guide portion 111 is located in the first accommodating cavity 120, and the first gap is provided between one end of the air guide cone 320 close to the air inlet cover 110 and one end of the air guide portion 111 close to the air guide cone 320.

[0287] Specifically, in this implementation, the air guide portion 111 can be a cylinder, a triangular prism, a cube or a cuboid. The air guide portion 111 is designed to have different shapes, so that the wind entering the first accommodating cavity 120 can flow along the surface of the air guide portion 111, thereby guiding the wind entering the first accommodating cavity 120. Therefore, in specific applications, technical personnel in related fields can design the specific shape of the air guide portion 111 according to specific needs.

[0288] It can be understood that the length of the air guide portion 111 extending into the first accommodating 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 portion 111 extending into the first accommodating cavity 120; the smaller the distance value of the first gap, the shorter the length of the air guide portion 111 extending into the first accommodating cavity 120.

[0289] In an optional implementation, as shown in Figures 11-2 and 11-4, the end face of the air guide cone 320 close to one end of the air inlet cover 110 is circular, and the diameter of the end face of the air guide cone 320 close to one end of the air inlet cover 110 is smaller than the diameter of the circumscribed circle of the end face of the air guide part 111.

[0290] It can be understood that designing the end face of the air guide cone 320 close to the air inlet cover 110 to be circular can effectively enhance the stability of the structure of the air guide cone 320 compared to the end of the air guide cone 320 close to the air inlet cover 110 being the vertex.

[0291] It is understandable that the end face of the air guide portion 111 may be square, triangular, or circular, and is not specifically limited here.

[0292] Optionally, the axis of the wind guide cone 320 can coincide with the axis of the wind guide portion 111. In this way, when the diameter of the circumscribed circle of the end face of the wind guide portion 111 is larger than the diameter of the end face of the wind guide cone 320 close to the air inlet cover 110, the wind along the surface of the wind guide portion 111 will not be blocked by the end face of the wind guide cone 320 close to the air inlet cover 110 in the process of flowing into the air duct formed by the wind guide cone 320 and the fan blades 310, so that the wind guided by the wind guide portion 111 can be introduced into the air duct to improve the air outlet efficiency of the fan.

[0293] In an optional implementation, as shown in a three-dimensional view of a handheld fan air supply assembly 300 from another angle provided in Figure 11-6, the air supply assembly 300 also includes a rotating shaft 330 arranged in the inner cavity of the air guide cone 320, and the rotating shaft 330 is used to drive the air guide cone 320 to rotate around a preset axial direction, and the preset axial direction is the air supply direction of the air supply part 100.

[0294] Specifically, the air guide cone 320 can be set as a hollow structure to form an inner cavity. Setting the rotating shaft 330 in the inner cavity of the air guide cone 320 can not only effectively utilize the space, but also avoid the formation of flocculation due to the rotating shaft 330 being designed outside the air guide cone 320.

[0295] In an optional implementation, as shown in FIG. 11-4 and FIG. 11-6 , the air supply assembly 300 further includes a plurality of support plates 340 , and the plurality of support plates 340 are connected between the inner wall of the air guide cone 320 and the rotating shaft 330 .

[0296] It is understandable that installing the 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 stronger.

[0297] Further optionally, to increase the stability of the connection between the air guide cone 320 and the rotating shaft 330, a plurality of support plates 340 may be arranged around the periphery of the rotating shaft 330. Furthermore, the support plates 340 may 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.

[0298] In an optional implementation, as shown in FIG. 11-4 and FIG. 11-6 , the air supply assembly 300 further includes a sleeve 350 sleeved on the periphery of the rotating shaft 330 , and the support plate 340 and the rotating shaft 330 are connected via the sleeve 350 .

[0299] Optionally, one end of the sleeve 350 can be connected to one 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 shock-absorbing, thereby ensuring the stability of the connection between the support plate 340 and the air guide cone 320.

[0300] In an optional implementation, as shown in FIG. 11-4 and FIG. 11-6 , the rotating shaft 330 , the sleeve 350 and the air guide cone 320 are integrally formed.

[0301] It is understandable that 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.

[0302] Specifically, the first end of the air guide cone 320 close to the air inlet cover 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 .

[0303] In an optional implementation, as shown in FIG11-2 and FIG11-4 , the diameter of the circumscribed circle of the end surface of the air guide portion 111 is greater than 5 mm and less than 12 mm;

[0304] The end surface of the air guide cone 320 close to the air inlet cover 110 is circular, and the diameter of the end surface of the air guide cone 320 close to the air inlet cover 110 is greater than 1 mm and less than 7 mm.

[0305] It can be understood that by setting the diameter of the circumscribed circle of the end face of the air guide portion 111 to be larger and the diameter of the end face of the air guide cone 320 close to the air inlet cover 110 to be smaller, the wind along the surface of the air guide portion 111 will not be blocked by the end face of the air guide cone 320 close to the air inlet cover 110 or will be less blocked by the end face of the air guide cone 320 close to the air inlet cover 110 during the process of flowing into the air duct formed by the air guide cone 320 and the fan blades 310, so that the wind guided by the air guide portion 111 can be introduced into the air duct as much as possible to improve the air outlet efficiency of the fan.

[0306] In addition, by designing the diameter of the circumscribed circle of the end face of the air guide portion 111 to be larger, the stability of the air inlet cover body 112 can be enhanced when the air guide portion 111 serves as a supporting structure of the air inlet cover body 112; and by setting the diameter of the end face of the air guide cone 320 close to one end of the air inlet cover 110 to be smaller, the volume of the air guide cone 320 can be reduced, and the air guide cone 320 can occupy less space in the first accommodating cavity 120, so that the volume of the air duct formed in the air supply portion 100 is larger, so that more wind can be delivered through the air supply portion 100, thereby improving the air outlet efficiency of the fan.

[0307] Further optionally, the diameter of the circumscribed circle of the end face of the air guide portion 111 can be 8 mm, and the diameter of the end face of the air guide cone 320 close to the air inlet cover 110 can be 4 mm. In this way, the diameter of the circumscribed circle of the end face of the air guide portion 111 can be larger than the diameter of the end face of the air guide cone 320 close to the air inlet cover 110, so that the wind along the surface of the air guide portion 111 will not be blocked by the end face of the air guide cone 320 close to the air inlet cover 110 during the process of flowing into the air duct formed by the air guide cone 320 and the fan blades 310, so that the wind guided by the air guide portion 111 can be introduced into the air duct to improve the air outlet efficiency of the fan.

[0308] In an optional implementation, as shown in FIG. 11-4 , the air supply assembly 300 further includes a collar 360 sleeved around the outer periphery of the rotating shaft 330 , and the collar 360 is sleeved between the rotating shaft 330 and the sleeve 350 .

[0309] It is understandable that the ring 360 sleeved between the rotating shaft 330 and the sleeve 350 can make the sleeve between the rotating shaft 330 and the sleeve 350 more secure, prevent slippage, and increase the strength of the rotating shaft 330.

[0310] In an optional implementation, as shown in FIG11-4 , the collar 360 and the rotating shaft 330 are integrally formed.

[0311] It is understandable that the integral molding of the collar 360 and the rotating shaft 330 can increase the stability of the sleeve arrangement between the collar 360 and the rotating shaft 330 and can further increase the strength of the rotating shaft 330 .

[0312] Example 12, see Figures 12-1 to 12-5.

[0313] As shown in the three-dimensional view of a handheld fan provided in FIG12-1 , the three-dimensional view of a handheld fan provided in FIG12-3 from another angle, and the cross-sectional view of a handheld fan provided in FIG12-2 along the AA section line, a handheld fan includes: an air inlet cover 100, an air outlet cover 200, a first shell 300, a handheld portion 400, and a fan module 500. The air inlet cover 100 includes a plurality of air guide plates 110 connected and radially arranged around a preset axial direction, the preset axial direction being the axial direction from the air inlet cover 100 to the air outlet cover 200. An air inlet gap is defined between two adjacent air guide plates 110, and each air guide plate 110 further protrudes toward a side away from the air outlet cover 200.

[0314] The first housing 300 is connected between the air inlet cover 100 and the air outlet cover 200, and forms a first accommodating cavity with the air inlet cover 100 and the air outlet cover 200;

[0315] One end of the handheld portion 400 is connected to the first shell 300;

[0316] The fan module 500 is disposed in the first accommodating cavity.

[0317] Specifically, the air inlet cover 100 and the air outlet cover 200 may be arranged relative to each other so that the air supply efficiency of the formed air supply path is sufficiently high.

[0318] Specifically, the connection of the plurality of air guide plates 110 may be achieved by respectively connecting the first ends of the plurality of air guide plates 110 and respectively connecting the second ends of the plurality of air guide plates 110 .

[0319] Specifically, the handheld portion 400 can be any structure for holding, which is not specifically limited here.

[0320] Specifically, the fan module 500 can be any fan, for example, an axial flow fan, a centrifugal fan, or a diagonal flow fan, which is not specifically limited here.

[0321] It is understandable that the connection method here can be one-piece molding or connection through connecting parts, which is not specifically limited here.

[0322] In this way, the air guide plate 110 of the air inlet cover 100 protrudes toward the side away from the air outlet cover 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 cover 100 is a shape that protrudes toward the side away from the air outlet cover 200. Compared with the situation where the shape of the air outlet cover 200 is flat or the air outlet cover is concave toward the side away from the air outlet cover 200, this can effectively increase the air intake volume of the air inlet cover 100. Therefore, when the fan module 500 in the first accommodating cavity is working, more wind can be introduced into the first accommodating cavity through the air inlet cover 100 and sent to the air outlet cover 200 for blowing out, thereby increasing the air intake efficiency of the air inlet cover 100 and the air outlet efficiency of the air outlet cover 200, thereby improving the cooling efficiency of the handheld fan.

[0323] In an optional implementation, as shown in the three-dimensional diagram of the air inlet cover 100 of a handheld fan provided in Figure 12-4, the air inlet cover 100 also includes a first base 120 and a circular ring 130 arranged around the preset axial ring on the periphery of the first base 120, and the first end of the first base 120 away from the air outlet cover 200 is closed and the other end is open.

[0324] 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 plates 110 can ensure the stability of the connection between the air guide plates 110; on the other hand, since the air guide plates 110 are arranged around the first base 120, the stability of the overall structure of the air inlet cover 100 can be ensured by connecting the air guide plates 110 to the first base 120.

[0325] It can be understood that the closure of the first end of the first base 120 away from the air outlet cover 200 can prevent wind from entering the inner cavity of the first base 120, thereby avoiding the impact of excessive wind speed on the side of the air inlet cover 100 on the first base 120 when the fan module 500 is working, and further avoiding the problem of structural instability of the air inlet cover 100 caused by the impact on the first base 120.

[0326] In an optional implementation, as shown in FIG12-4 , the first substrate 120 is a hollow cylinder.

[0327] It can be understood that designing the first base 120 as a hollow structure can effectively reduce the weight of the handheld fan, thereby increasing the portability of the handheld fan. In addition, designing the first base 120 as a hollow structure can save the material used for the first base 120, thereby saving the manufacturing cost of the handheld fan.

[0328] It can be understood that since the air guide plate 110 is arranged between the first base 120 and the ring 130, compared with designing the first base 120 as other structures, designing the first base 120 as a cylinder can keep the shape and length of each air guide plate 110 the same, thereby ensuring that the air guide space formed between any two air guide plates 110 is the same, thereby ensuring that the air is distributed more evenly when the air inlet cover 100 takes in air, and further ensuring that the distribution of the air delivered from the air outlet cover 200 is more even, avoiding the uneven wind delivered from the side of the air outlet cover 200 to bring a poor user experience.

[0329] In an optional implementation, as shown in FIG. 12-4 , the end surface of the first end of the first base 120 is recessed inwardly compared to the end surface of the end of the ring 130 away from the air outlet cover 200 .

[0330] It should be noted that, in this implementation, the end surface of the first end of the first base 120 being concave inward means that the end surface of the first end of the first base 120 is convex toward the direction close to the air outlet cover 200 .

[0331] It can be understood that the end surface of the first end of the first base 120 is recessed inward compared to the end surface of the end of the ring 130 away from the air outlet cover 200, and the air guide plate 110 is connected between the first base 120 and the ring 130 and protrudes toward the side away from the air outlet cover 200. This makes the air inlet cover 100 protrude toward the side away from the air outlet cover 200 to a greater extent, thereby making the air inlet area of ​​the air inlet cover 100 larger, so that the air inlet area of ​​the air inlet cover 100 can be increased without changing the volume of the handheld fan, thereby increasing the air intake efficiency of the handheld fan and improving the cooling efficiency of the handheld fan.

[0332] In an optional implementation, as shown in FIG12-4 , the inner diameter of the circular ring 130 is larger than the outer diameter of the first base 120 , and the inner diameter of the circular ring 130 gradually decreases toward the air outlet direction.

[0333] It can be understood that the inner diameter of the ring 130 is larger than the outer diameter of the first base 120, so that an air inlet channel can be formed between the ring 130 and the first base 120, and the incoming air can enter the first accommodating cavity through the air inlet channel; and the inner diameter of the ring 130 gradually decreases toward the air outlet direction, so that the wind entering the air inlet cover 100 can be compressed, and the pressure of the air entering the side of the air inlet cover 100 can be increased, thereby increasing the wind speed of the air entering the side of the air inlet cover 100 and improving the air intake efficiency of the handheld fan.

[0334] In an optional implementation, as shown in FIG. 12-4 , a plurality of the air guide plates 110 are evenly arranged around the periphery of the first base 120 and connected between the circular ring 130 and the first end of the first base 120 .

[0335] It can be understood that multiple air guide plates 110 are evenly arranged around the periphery of the first base 120, so that the gap distance between any two adjacent air guide plates 110 can be equal; multiple air guide plates 110 are evenly arranged around the periphery of the first base 120, so that the air intake of the air inlet cover 100 can be more uniform, thereby making the air intake process of the air inlet cover 100 smoother, avoiding uneven air output when the handheld fan is discharging air, resulting in a bad user experience.

[0336] Connecting multiple air guide plates 110 between the ring 130 and the first end of the first base 120 can prevent part of the first base 120 from being located outside the first accommodation cavity, thereby avoiding increasing the volume of the handheld fan and further preventing the handheld fan from being inconvenient to carry.

[0337] In an optional implementation, as shown in FIG. 12-4 , the width of the air guide plate 110 gradually decreases along an extension direction from the periphery of the air inlet cover 100 toward the center of the air inlet cover 100 .

[0338] It can be understood that the wind guide plate 110 has a certain width, which can make the structure of the wind guide plate 110 more stable when guiding air. The width of the wind guide plate 110 gradually decreases along the outer periphery of the air inlet cover 100 toward the center of the air inlet cover 100. While ensuring the structural stability of the wind guide plate 110, the material used for the wind guide plate 110 can be further saved, thereby saving the manufacturing cost of the handheld fan.

[0339] In an optional implementation, as shown in FIG12-4 , the first base 120 , the circular ring 130 and the plurality of air guide plates 110 are integrally formed.

[0340] It can be understood that the first base 120, the ring 130 and the multiple wind 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 being structurally unstable when impacted by the incoming wind, thereby affecting the air intake efficiency of the handheld fan.

[0341] In an optional implementation, as shown in FIG12-5 , FIG12-1 , and FIG12-4 , the first housing 300 includes a first side wall 310 , which is disposed around the predetermined axial direction and around the periphery of the air inlet cover 100 .

[0342] The inner edge of the air inlet cover 100 is provided with a plurality of first buckles 140;

[0343] A first through hole 311 matching the first buckle 140 is provided at one end of the first side wall 310 close to the air inlet cover 100 , and the first through hole 311 is open at a side away from the first side wall 310 ;

[0344] The first buckle 140 includes an inserting portion, a second end of the inserting portion is bent to form a chamfer, and the second end is away from one side of the air inlet cover 100;

[0345] The first side wall 310 and the air inlet cover 100 are connected by inserting the inserting portion into the first through hole 311 along the air inlet direction and by buckling the chamfer onto the inner wall of the first side wall 310 .

[0346] It can be understood that the inner side of the air inlet cover 100 and the inner side of the first side wall 310 are respectively the sides close to the first accommodating cavity.

[0347] Optionally, as shown in Figures 12-4 and 12-5, the first side wall 310 can be provided with a chamfered surface 313 at one end edge close to the air inlet cover 100, and the chamfered surface 313 extends toward the center of the air inlet cover 100. The chamfered surface 313 of the first side wall 310 is connected to the air inlet cover 100, so that the connection between the first side wall 310 and the air inlet cover 100 can be achieved. Specifically, in this implementation, the first through hole 311 can be arranged on the chamfered surface 313 of the first side wall 310, and the first clip 140 arranged on the inner edge of the air inlet cover 100 can be arranged on the inner side of the circular ring 130 of the air inlet cover 100. By inserting the first clip 140 into the first through hole 311 and making the chamfer of the first clip 140 buckled on the inner wall of the chamfered surface 313 of the first side wall 310, the air inlet cover 100 can be buckled with the first side wall 310 from the inside of the first accommodating cavity, thereby avoiding the connection structure between the air inlet cover 100 and the first side wall 310 being easily destroyed when the air inlet cover 100 and the first side wall 310 are buckled from the outside, resulting in the problem that the integrity of the air inlet cover 100 and the first side wall 310 cannot be guaranteed.

[0348] In an optional implementation, as shown in FIG12-4 and FIG12-5 , the inner edge of the air inlet cover 100 is further provided with a plurality of first plug-ins 150 ;

[0349] A second through hole 312 matching the first plug-in 150 is provided on the inner side of the first side wall 310 close to the air inlet cover 100 ;

[0350] The air inlet cover 100 and the first side wall 310 are connected by inserting the first plug-in unit 150 into the second through hole 312 and fixing the first plug-in unit 150 in the second through hole 312 .

[0351] It can be understood that the inner side of the air inlet cover 100 and the inner side of the first side wall 310 are respectively the sides close to the first accommodating cavity.

[0352] Optionally, as shown in Figures 12-4 and 12-5, the first side wall 310 can be provided with a chamfered surface 313 at one end edge close to the air inlet cover 100, and the chamfered surface 313 extends toward the center of the air inlet cover 100. The chamfered surface 313 of the first side wall 310 is connected to the air inlet cover 100, so that the connection between the first side wall 310 and the air inlet cover 100 can be achieved. Specifically, in this implementation, the second through hole 312 can be arranged on the chamfered surface 313 of the first side wall 310, and the first plug-in arranged on the inner edge of the air inlet cover 100 can be arranged on the inner wall of the ring 130 of the air inlet cover 100. By inserting the first plug-in 150 into the second through hole 312, the air inlet cover 100 is connected to the first side wall 310 from the inside of the first accommodating cavity, thereby avoiding the connection structure between the air inlet cover 100 and the first side wall 310 being easily destroyed when the air inlet cover 100 and the first side wall 310 are connected from the outside, resulting in the problem that the integrity of the air inlet cover 100 and the first side wall 310 cannot be guaranteed.

[0353] Example 13, see Figures 13-1 to 13-6.

[0354] Please refer to Figures 13-1 to 13-6. The utility model provides a handheld fan to solve the problem of how to facilitate disassembly and installation, convenient maintenance, and extend the service life of the handheld fan.

[0355] Specifically, please refer to Figure 13-1, which is a three-dimensional diagram of a handheld fan provided in an embodiment of the present invention. The handheld fan includes: an air supply part 10 and a hand-held part 20. Please refer to Figures 13-2 to 13-3. The air supply part 10 includes a first inner shell 101, a second inner shell 102 that is snapped together with the first inner shell 101, and an outer shell 103; the first inner shell 101 is evenly provided with a protruding structure 1010 on the side facing the second inner shell 102, and the second inner shell 102 is provided with a recessed structure 1020 corresponding to the protruding structure, and the protruding structure 1010 and the recessed structure 1020 are snapped together. The outer shell 103 is covered outside the first inner shell 101 and the second inner shell 102 to accommodate the first inner shell 101 and the second inner shell 102. By evenly arranging a raised structure 1010 on the outer wall edge of the first inner shell 101 facing the second inner shell 102, and arranging a recessed structure 1020 on the outer wall of the second inner shell 102 facing the first inner shell 101 corresponding to the raised structure 1010, the raised structure 1010 and the recessed structure 1020 can be tightly fastened together, thereby ensuring that the first inner shell 101 and the second inner shell 102 can be tightly fastened together while also ensuring convenient installation and disassembly between the first inner shell 101 and the second inner shell 102. Furthermore, by arranging the raised structure 1010 and the recessed structure 1020, the installation method in which the first inner shell 101 and the second inner shell 102 are fastened together can be achieved, which can facilitate disassembly and installation during later maintenance, thereby facilitating maintenance.

[0356] Furthermore, a fan base 111 is provided within the second inner shell 102. 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 provided with a conical cavity, within which a bearing 113 is disposed. A motor shaft 114 is inserted into the bearing 113, and the motor shaft 114 is connected to a motor 115. The bearing 113 is disposed around the outside of the motor shaft 114. When the motor shaft 114 rotates, the bearing 113 can effectively mitigate axial deviation caused by the rotation of the motor shaft 114. The provision of the bearing 113 ensures the rotational stability of the motor shaft 114, thereby ensuring the overall operational stability of the handheld fan.

[0357] Specifically, the rear side of the fan base 111 is provided with a receiving cavity 123, 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, and a connecting plate 1230 is provided between the outer wall of the receiving cavity 123. The connecting plate 1230 is connected to the inner wall of the second inner shell 102. The provision of the connecting plate 1230 strengthens 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 in operation.

[0358] Furthermore, as shown in Figure 13-4 , a first circuit board 116 is mounted on the rear side of the fan base 111, and a second circuit board 204 is housed within the handle. A first wiring channel 117 is radially defined within the fan base 111. This channel is used to accommodate the wires running from the first circuit board 116 to the second circuit board 204. The wires extend from the first circuit board 116 to the second circuit board 204, which is located within the handle 20, facilitating wiring. The provision of the first wiring channel 117 ensures that the wires are not easily bent when connected to the circuit boards, extending their service life. The wires bypass the outside of the fan impeller 112 to connect to the second circuit board 204, preventing them from contacting the impeller 112 and causing scratches that could result in a short circuit or poor contact. During assembly, the central portion of the wires can be placed within 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.

[0359] Specifically, as shown in FIG13-5 , the handheld portion 20 is provided with a first connecting member 203, and the air supply portion 10 is provided with a second connecting member 105. The air supply portion 10 and the handheld portion 20 are connected via a fixing member 131. The fixing member 131 passes through the first connecting member 203 and the second connecting member 105 to connect the air supply portion 10 and the handheld portion 20. Part of the handheld portion 20 is embedded in the air supply portion 10. By partially embedding the handheld portion 20 in the air supply portion 10 and providing the first connecting member 203 and the second connecting member 105 to be fixedly connected via the fixing member 131, the overall firmness and stability of the handheld fan when in use are ensured. For example, the fixing member 131 can be a screw, or it can be other fixing members 131 for connecting the air supply portion 10 and the handheld portion 20. This embodiment of the utility model does not impose any further restrictions.

[0360] Furthermore, as shown in FIG13-6 , a plurality of connecting grooves are axially provided on the outer walls of the first inner shell 101 and the second inner shell 102, and connecting protrusions 1031 are provided on the inner wall of the outer shell 103 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 connect with 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.

[0361] Specifically, the air supply part 10 also includes an air inlet cover 104 that is covered on the second inner shell 102. The air inlet cover 104 is provided with an annular protrusion facing outward, and the height of the protrusion is higher than the center of the air inlet cover 104. There is a gap between the air inlet cover 104 and the fan impeller 112. By setting the gap between the air inlet cover 104 and the fan impeller 112, the wind guiding effect is improved. In this embodiment, the air inlet cover 104 is formed by the gaps between the connecting strips that are scattered in the central axial edge area to form the opening structure. The connecting strips are in an arc-shaped structure, and the opening direction of the arc-shaped structure is toward the fan impeller 112. By setting the air inlet cover formed by 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 cover and improving the user experience. In other embodiments, a number of circular, square or other shaped hole structures are provided on the air inlet cover 104.

[0362] Furthermore, a display screen 122 is installed in the accommodating cavity 123, and the air outlet portion 121 is arranged around the outside of the display screen 122. When in use, the display screen 122 is used to display the remaining power, current wind speed and battery power.

[0363] Specifically, the first inner shell 101 has a stepped structure, and trapezoidal cavities are provided at annular intervals on the outer inclined surface of the first inner shell 101. The provision of the trapezoidal cavities reduces the vibration felt on the outer shell 103 when the motor 115 drives the fan impeller 112 to rotate, thereby improving the user experience.

[0364] Furthermore, the handheld unit 20 also includes a bracket 201 and a battery 202 disposed in the bracket 201. The battery 202 is electrically connected to the motor 115 and the display screen 122. When in use, the battery 202 can power the motor 115 to rotate the fan impeller 112, and can also power the display screen 122 to display the remaining power, current wind speed, and battery power.

[0365] Example 14, see Figures 14-1 to 14-7.

[0366] Please refer to Figures 14-1 to 14-7, which are used to solve the problem that when using a handheld fan, the swing caused by the rotation of the impeller will generate vibration, and the vibration of the impeller will be transmitted to the shell to generate noise. An embodiment of the present invention provides a handheld fan. Please refer to Figure 14-1, which is a schematic diagram of a handheld fan provided by an embodiment of the present invention. The handheld fan includes an air supply part 10 and a handheld part 20. Please refer to Figure 14-2, which is an exploded schematic diagram of a handheld fan provided by an embodiment of the present invention. The air supply part 10 includes a detachable and assembled outer shell 11 and an inner shell 12. The outer shell 11 is provided with a first receiving chamber 111 suitable for accommodating the inner shell 12, and the inner shell 12 is provided with a second receiving chamber 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.

[0367] Specifically, the outer shell 11 and the inner shell 12 are detachably assembled, the inner shell 12 is arranged in a first storage cavity 111 in the outer shell 11, and the air supply component 30 is arranged in a second storage cavity 121 of the inner shell 12. When the handheld fan is used, the rotation of the air supply component 30 will cause the inner shell 11 to vibrate, and the shock-absorbing structure 40 arranged between the outer shell 11 and the inner shell 12 can effectively reduce the vibration of the air supply component 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.

[0368] Furthermore, the shock-absorbing structure 40 is clamped on the inner side of the outer shell 11, and the shock-absorbing structure 40 is arranged along the periphery 122 of the circumferential seat of the inner shell 12. In an embodiment of the utility model, the outer shell 11 and the inner shell 12 are detachably connected, and the shock-absorbing structure 40 is clamped on 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, and the shock-absorbing structure 40 is clamped on the inner side of the outer shell 11, which is relatively simple to disassemble, and is convenient for timely cleaning of components such as the outer shell 11, the inner shell 12 and the air inlet cover 50.

[0369] Furthermore, the shock-absorbing structure 40 is integrally formed with the inner shell 12, which not only effectively reduces the vibration of the air supply assembly 30 transmitted from the inner shell 12 to the outer shell 11 during rotation, but also the integral formation of the shock-absorbing structure 40 and the inner shell 12 makes the structure of the handheld fan more concise and compact, simplifies the overall assembly process of the handheld fan, and effectively improves the production efficiency of the handheld fan.

[0370] Further, please refer to Figure 14-3, which is a schematic diagram of an air supply part provided in an embodiment of the utility model. The shock-absorbing structure 40 is at least two trapezoidal protrusions, and the trapezoidal protrusions are arranged at equal intervals. The number of the 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, the embodiment of the utility model does not impose further restrictions.

[0371] Specifically, in this embodiment of the present invention, the shock-absorbing structure 40 is configured as a trapezoidal protrusion, with the wider side of the trapezoidal protrusion facing the outer shell 11, and the narrower side of the trapezoidal protrusion facing the inner shell 12. The trapezoidal protrusion can abut against the inner side of the outer shell 11, thereby effectively buffering the vibration of the air supply assembly 30 transmitted from the inner shell 12 to the outer shell 11 during rotation, thereby achieving a shock-absorbing effect.

[0372] Furthermore, the trapezoidal protrusion is hollow, and one end of the trapezoidal protrusion that engages with the outer shell 11 is provided with a through hole 41 to facilitate ventilation. In this embodiment of the utility model, the hollowness of the trapezoidal protrusion can reduce the weight of the trapezoidal protrusion, making the handheld fan more portable. It also allows for some space for elastic deformation when the outer shell 11 and the inner shell 12 rotate relative to each other, thereby enhancing the stability of the connection between the outer shell 11 and the inner shell 12. In this embodiment of the utility model, the through hole 41 is provided at one end of the trapezoidal protrusion that engages with the outer shell 11, so that the trapezoidal protrusion does not block the through hole 41 while reducing shock.

[0373] Further, please refer to Figure 14-4, which is a cross-sectional view of a handheld fan provided in an embodiment of the present utility model. The air supply part 10 also includes an air inlet cover 50 clamped on the inner shell 12, and the air inlet cover 50 includes an air inlet plate 501 and a fixing ring 502 clamped on the outer periphery of the air inlet plate 501. An air duct located in the second receiving cavity 121 is formed between the air inlet plate 501 and the air supply assembly 30.

[0374] Specifically, the air supply component 30 is located in the second storage cavity 121. When the air supply component is working, the air from the air inlet plate 501 can be directed out of the second storage cavity 121, thereby forming an air duct, making the handheld fan's air output more uniform and improving the handheld fan's air output efficiency.

[0375] Further, please refer to Figure 14-5, which is a schematic diagram of an air supply assembly provided in an embodiment of the present utility model. 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 arranged around the outside of the conical cavity 321. A motor bearing 311 is provided in 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 during high-speed rotation, thereby ensuring the overall operating stability of the handheld fan.

[0376] Specifically, in the embodiment of the present invention, when the user uses the handheld fan, the blades 322 rotate under the drive of the drive motor 31, guiding the wind from the air inlet cover 50 into the air duct space within the second storage cavity 121 and blowing it out from the side of the air outlet. The user can hold the handheld fan to blow the wind to the part that needs to be cooled, thereby achieving the purpose of rapid cooling and improving human comfort.

[0377] Furthermore, the maximum outer diameter of the impeller assembly 32 is smaller than the maximum outer diameter of the air inlet hood 50. This arrangement allows the impeller assembly 32 to be largely covered, which not only improves aesthetics but also prevents pinching of fingers and hair, thereby improving the user experience. The maximum outer diameter of the outer shell 11 is equal to the maximum outer diameter of the air inlet hood 50, ensuring that the air inlet hood 50 and the outer shell 11 match in size and are securely mounted.

[0378] Further, please refer to Figure 14-6, which is a schematic diagram of an impeller assembly provided in an embodiment of the present invention. The blades 322 are in an oblique flow shape, and an oblique flow air duct 323 is formed between two adjacent blades 322. The oblique flow air duct 323 is used to guide the wind from the air inlet cover 50 into the air duct space. The blades 322 of the handheld fan are preferably in an oblique flow shape, which can make the handheld fan have a larger air volume, smaller noise, and a more compact structure, which is convenient for holding and carrying.

[0379] Further, please refer to Figure 14-7, which is a connection diagram of a wind supply part and a hand-held part provided in an embodiment of the present utility model. The hand-held part 20 is provided with a first connecting member 21, and the air supply part 10 is provided with a second connecting member 13. The hand-held part 20 and the air supply part 10 are connected by a fixing member 22, and the fixing member 22 passes through the first connecting member 21 and the second connecting member 13 to fix the hand-held part 20 and the air supply part 10. For example, the fixing member 22 can be a screw, or it can be other fixing members 22 for connecting the air supply part 10 and the hand-held part 20. Here, the embodiment of the present utility model does not impose further restrictions.

[0380] The present invention provides a handheld fan, comprising an air supply unit and a handheld unit. The air supply unit comprises a detachably assembled outer shell and an inner shell. The outer shell is provided with a first receiving chamber adapted to accommodate the inner shell, and the inner shell is provided with a second receiving chamber adapted to mount an air supply assembly. A shock-absorbing structure is provided between the outer shell and the inner shell. The handheld fan provided by the present invention effectively reduces noise generated by the vibration of the impeller transmitted to the outer shell during use by adding a shock-absorbing structure between the outer shell and the inner shell. This improves the overall comfort of the user when using the handheld fan and provides a better user experience.

[0381] Example 15, see Figures 15-1 to 15-6.

[0382] Please refer to Figures 15-1 to 15-6. The utility model provides a handheld fan to solve the problem of how to achieve good air output effect and high cooling efficiency while achieving a small size handheld fan.

[0383] Specifically, please refer to Figure 15-1 for a three-dimensional diagram of a handheld fan provided by an embodiment of the present invention, the handheld fan includes: an air supply part 10 and a hand-held part 20, please refer to Figures 15-2 to 15-3, the air supply part 10 includes a first inner shell 101 and a second inner shell 102 that is snapped together with 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 in 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 close to the air inlet side protrudes from the end of the fan impeller 112 close to the air inlet side. By arranging the fan impeller 112 inside the first inner shell 101 and the end of the first inner shell 101 close to the air inlet side protruding beyond the end of the fan impeller 112 close to the air inlet side, an air inlet channel is created between the fan impeller 112 and the air inlet side, thereby improving the wind guiding effect. The fan impeller 112 is arranged inside the first inner shell 101, so that the airflow enters from the air inlet side and flows along the fan impeller 112, converges at the air outlet side and flows out, thereby improving the air outlet effect of the handheld fan.

[0384] Furthermore, the first inner shell 101 has a stepped structure, with trapezoidal cavities 1011 arranged at annular intervals on the outer inclined surface of the first inner shell 101. Protrusions 1010 are arranged at intervals on the side of the first inner shell 101 facing the second inner shell 102, and recessed structures 1020 are provided on the second inner shell 102 corresponding to the protrusions. The provision of the trapezoidal cavities 1011 reduces the overall vibration of the air supply unit 10 when the fan impeller 112 rotates, thereby improving the user experience. By evenly arranging a raised structure 1010 on the outer wall edge of the first inner shell 101 facing the second inner shell 102, and arranging a recessed structure 1020 on the outer wall of the second inner shell 102 facing the first inner shell 101 corresponding to the raised structure 1010, the raised structure 1010 and the recessed structure 1020 can be tightly fastened together, thereby ensuring that the first inner shell 101 and the second inner shell 102 can be tightly fastened together while also ensuring convenient installation and disassembly between the first inner shell 101 and the second inner shell 102. Furthermore, by arranging the raised structure 1010 and the recessed structure 1020, the installation method in which the first inner shell 101 and the second inner shell 102 are fastened together can be achieved, which can facilitate disassembly and installation during later maintenance, thereby facilitating maintenance.

[0385] Specifically, the air supply unit 10 further includes an outer shell 103 that is 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 with each other to guide the first inner shell 101 and the second inner shell 102 to be connected 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.

[0386] Furthermore, the fan impeller 112 is provided with a conical cavity, within which a bearing 113 is disposed. A motor shaft 114 is inserted into the bearing 113, and the motor shaft 114 is connected to a motor 115. The bearing 113 is disposed around the outside of the motor shaft 114. When the motor shaft 114 rotates, the bearing 113 can effectively reduce the axial deviation caused by the rotation of the motor shaft 114. The provision of the bearing 113 ensures the rotational stability of the motor shaft 114, thereby ensuring the overall operational stability of the handheld fan.

[0387] Specifically, the air supply part 10 also includes an air inlet cover 104 that is covered on the second inner shell 102. The air inlet cover 104 is provided with an annular protrusion facing outward, and the height of the protrusion is higher than the center of the air inlet cover 104. There is a gap between the air inlet cover 104 and the fan impeller 112. By setting the gap between the air inlet cover 104 and the fan impeller 112, the wind guiding effect is improved. In this embodiment, the air inlet cover 104 is formed by the gaps between the connecting strips that are scattered in the central axial edge area to form the opening structure. The connecting strips are in an arc-shaped structure, and the opening direction of the arc-shaped structure is toward the fan impeller 112. By setting the air inlet cover formed by 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 cover and improving the user experience. In other embodiments, a number of circular, square or other shaped hole structures are provided on the air inlet cover 104.

[0388] Furthermore, an air outlet 121 is provided on the outside 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. The air outlet 121 is arranged around the outside of the display screen 122. The display screen 122 is used to display the gear position and power.

[0389] Specifically, a connecting plate 1230 is provided between the outer wall of the accommodating chamber 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 between the outer wall of the accommodating chamber 123 and the inner wall of the second inner shell 102 strengthens the stability between the second inner shell 102 and the accommodating chamber 123, reduces the vibration caused by the operation of the motor 115 connected to the fan base 111, ensures the stability between the accommodating chamber 123 and the second inner shell 102, and further improves the stability of the fan base 111 when the handheld fan is in operation.

[0390] Furthermore, as shown in FIG15-4 , the handheld portion 20 is provided with a first connecting member 203, and the air supply portion 10 is provided with a second connecting member 105. The air supply portion 10 and the handheld portion 20 are connected via a fixing member 131. The fixing member 131 passes through the first connecting member 203 and the second connecting member 105 to connect the air supply portion 10 and the handheld portion 20. Part of the handheld portion 20 is embedded in the air supply portion 10. By partially embedding the handheld portion 20 in the air supply portion 10 and providing the first connecting member 203 and the second connecting member 105 to be fixedly connected via the fixing member 131, the overall firmness and stability of the handheld fan when in use are ensured. For example, the fixing member 131 can be a screw, or it can be other fixing members 131 for connecting the air supply portion 10 and the handheld portion 20. This embodiment of the utility model does not impose any further restrictions.

[0391] Specifically, as shown in Figure 15-5, a first circuit board 116 is mounted on the rear side of the fan base 111. A first wiring channel 117 is radially defined within the fan base 111. Wires are routed from the first circuit board 116 to the second circuit board 204, which is located within the handle. The second circuit board 204 is located within the handle 20, facilitating wiring. The provision of the first wiring channel 117 ensures that the wires are less likely to bend when connecting the first and second circuit boards 116 and 204, extending their service life. The wires bypass the outside of the fan impeller 112 to connect to the second circuit board 204, preventing them from contacting the fan impeller 112 and potentially scratching them, resulting in a short circuit and poor contact. During assembly, the central wires can be placed within 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.

[0392] Furthermore, as shown in FIG15-6 , the handheld portion 20 further 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. During use, the battery 202 can power the motor 115 to rotate the fan impeller 112, and can also power the display screen 122 to display the remaining power, current wind speed, and battery level.

[0393] Example 16, see Figures 16-1 to 16-7.

[0394] As shown in Figure 16-1 of the specification:

[0395] A motor drive control circuit for a portable fan includes: a battery power supply, a voltage stabilizing 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.

[0396] Portable fans include: handheld fans, neck fans, wearable fans, waist-mounted fans, neck fans, head-mounted fans, desktop fans, car-mounted fans, etc.

[0397] As shown in Figure 16-2 of the specification:

[0398] The voltage stabilizing unit 100 includes a voltage stabilizing chip U1, and the power supply voltage VBAT is connected to the IN input pin of the voltage stabilizing 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 stabilizing chip U1, and the other end is grounded; the OUT output pin of the voltage stabilizing 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 stabilizing chip U1 is grounded through a capacitor C2 to filter the current; the GND pin of the voltage stabilizing chip U1 is grounded.

[0399] The voltage stabilization unit 100 is used to stabilize the power supply voltage and ensure a constant output voltage under different load conditions. It automatically adjusts the current according to changes in the power supply voltage to maintain a constant output voltage. The voltage stabilization unit 100 is used to stabilize a voltage source with large fluctuations to prevent external environmental factors (such as temperature and humidity) from affecting the circuit.

[0400] As shown in Figure 16-3 of the specification:

[0401] 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 motor 500 .

[0402] The permanent magnets are arranged on the rotor of the motor 500 , and the three windings U2 , V2 , and W2 are arranged on the stator of the motor 500 in a Y-type connection.

[0403] 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 phase windings of the motor 500 according to the control signal.

[0404] The motor driving circuit 400 includes capacitors C3, C4, and C5 connected in parallel, one end of which is connected to the power supply voltage VBAT and the other end is grounded to filter current and stabilize voltage.

[0405] In one embodiment, the motor drive circuit 400 further includes: a MOS switch Q1 connected to the power supply voltage VBAT at one end and to the winding U2 at the other end. The conduction of the MOS switch Q1 is controlled by the MOS switch Q4. The MOS switch Q4 has one end connected to the power supply voltage VBAT via a voltage-divider current-limiting resistor R5 and the other end connected to ground. The motor drive control unit 300 outputs a PWM_AH signal to the drain of the MOS switch Q4 to control the conduction of the MOS switch Q4. A MOS switch Q7 has one end connected to the winding U2 and the other end connected to ground via a resistor R11. The motor drive control unit 300 outputs a PWM_AL signal to the drain of the MOS switch Q7 to control the conduction of the MOS switch Q7. Reverse diodes are provided on the MOS switches Q1, Q4, and Q7. The diodes are reversely broken down before overvoltage damages the MOS transistors, preventing them from burning out.

[0406] Optionally, MOS switch Q1 is a P-type MOS transistor, and MOS switches Q4 and Q7 are N-type MOS transistors. Resistor R2 is connected to the drain and source of MOS switch Q4, and resistor R8 is connected to the drain and source of MOS switch Q7 to provide bias voltage for the field-effect transistors and discharge static electricity between the gate and source of the MOS transistors, thereby protecting the MOS transistors.

[0407] The current control principle of winding U2 is as follows:

[0408] Current flows into winding U2: the motor drive control unit 300 outputs a PWM_AL low-level signal to the drain of the MOS transistor switch Q7, and the MOS transistor switch Q7 is in the off state; the motor drive control unit 300 outputs a PWM_AH signal to the drain of the MOS transistor switch Q4. The MOS transistor switch Q4 is turned on, and the power supply voltage VBAT is grounded through the voltage-dividing current-limiting resistor R5. The drain of the MOS transistor switch Q1 is grounded and inputs a low level. The MOS transistor switch Q1 is turned on, and the current flows into winding U2.

[0409] Current flows out of winding U2: the motor drive control unit 300 outputs a PWM_AH low-level signal to the drain of the MOS switch Q4, and the MOS switch Q4 is in the off state. The drain of the MOS switch Q1 is connected to a high level, and the MOS switch Q1 is turned off; the motor drive control unit 300 outputs a PWM_AL signal to the drain of the MOS switch Q7, and the MOS switch Q7 is turned on, and current flows out of winding U2.

[0410] In one embodiment, a MOS switch circuit composed of MOS switches Q2, Q5, Q8 and resistors R6, R3, and R9 controls the inflow and outflow of current from winding V2. Its circuit structure and control principle are similar to those of the current control circuit of winding U2. A MOS switch circuit composed of MOS switches Q3, Q6, Q9 and resistors R7, R4, and R10 controls the inflow and outflow of current from winding W2. Its circuit structure and control principle are similar to those of the current control circuit of winding U2.

[0411] 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 the 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, and the motor drive control unit 300 converts the input voltage signal into a corresponding digital signal to obtain a quantized current value of the motor 500; one end of the 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.

[0412] As shown in Figure 16-4 of the specification:

[0413] In one embodiment, in the rotor position detection circuit 600, one end of the resistor R13 is connected to the BEMF_COM pin of the motor drive control unit 300, and the other end is grounded through the resistor R19; the winding U2 is connected to the BEMF_U pin of the motor drive control unit 300 through the resistor R14, and the other end of the resistor R14 is grounded through the resistor R19.

[0414] 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.

[0415] The motor drive control unit 300 monitors the line voltages of the windings U2 , V2 , and W2 via the signals input from the BEMF_U, BEMF_V, and BEMF_W pins, and calculates the back electromotive force of the rotor of the motor 500 , thereby calculating the position of the rotor of the motor 500 .

[0416] The driving control principle of the motor 500 is as follows:

[0417] The main control unit 200 outputs a motor start signal to the input end 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 tube of the motor drive circuit 400; the motor drive control unit 300 obtains the current position of the motor 500 rotor through the back electromotive force, controls the phase relationship of each phase output, and energizes the corresponding two-phase winding each time. The energization time of each phase winding is 120 electrical degrees, so that the stator flux and the reverse direction are at a certain angle to the rotor flux, so as to drive the rotor of the motor 500 to rotate.

[0418] As shown in Figure 16-5 of the specification:

[0419] 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 the capacitor C7 is connected to the VDD power supply pin 12 of the motor drive chip U3 to filter the current and stabilize the 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 operation pulse modulation signal PWM, and the pins 1-3 and 14-16 of the motor drive chip U3 output the motor drive signal to the gate of the MOS tube of the motor drive circuit 400; the pins 6-8 of the motor drive chip U3 receive the 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 the overcurrent protection signal.

[0420] As shown in Figures 16-6 to 16-7 of the specification:

[0421] In one embodiment, the USB access circuit 700 includes: USB voltage VBUS outputs a USBDET signal through a current limiting resistor R22; the anode of the diode D2 is grounded, and the cathode is connected to the USB voltage VBUS through the resistor R22 to implement overvoltage protection of the main control unit.

[0422] In one embodiment, the battery voltage detection analog-to-digital conversion circuit 800 includes: a battery voltage VBAT is grounded through resistors R23 and R24, a capacitor C8 is connected in parallel with the resistor R24; and one end of the resistor R24 ​​outputs an analog-to-digital conversion voltage signal V_ADC.

[0423] In one embodiment, the motor drive control circuit of the portable fan is provided with an adapter interface P2, which transmits the P_EN enable signal and the gear adjustment signals KEY, KEY_X, and KEY_Y of the dip switch to the main control unit 200 of the portable fan, and the VDD power supply is supplied to the mode switching roller through the current limiting resistors R25 and R26.

[0424] In one embodiment, the display unit 900 includes: an SMG switch interface, a digital display screen, and the SMG switch adapter interface pins 1-5 are connected to the main control unit 200 through current limiting resistors R25-R29. The display control signal is received and transmitted to the digital display screen. The digital display screen displays the portable fan blowing temperature and fan power percentage according to the display control signal.

[0425] 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-stabilizing capacitor C9; the VSS pin 16 of the control chip U4 is grounded; pins 4, 6, and 7 of the control chip U4 receive the gear adjustment signals KEY, KEY_X, and KEY_Y and send the fan's operating status instructions; pin 5 of the control chip U4 outputs the motor operation pulse modulation signal PWM to the motor driver chip U3; pin 8 of the control chip U4 receives the USBDET signal to determine the power supply status; pin 9 of the control chip U4 receives the analog-to-digital conversion voltage signal V_ADC; pins 2, 12-15 of the control chip U4 are connected to the display unit 900 to output the display control signal.

[0426] Example 17, see Figures 17-1 to 17-5.

[0427] As shown in Figure 17-1 of the specification:

[0428] A battery boost charging circuit for a portable fan comprises a USB interface, a boost module, a boost charging management module, a charging voltage preset module, a charging state indication module, and an over-temperature protection module.

[0429] Portable fans include: handheld fans, neck fans, waist fans, neck fans, head fans, desktop fans, car fans, etc.

[0430] The USB interface includes an interface J1, and the boost charging management module includes a charging chip U1.

[0431] As shown in Figure 17-2 of the specification:

[0432] In one embodiment, the boost charging management module has the following features: the charging chip U1 integrates a power MOS tube and a Boost synchronous boost circuit.

[0433] The boost module circuit includes: inductor L1, one end connected to the USB voltage VBUS, and the other end connected to the LX external inductor pin 8 of charging chip U1; charging chip U1's BST bootstrap capacitor pin 7 connected to pin 8 via bootstrap capacitor C2, which increases the DC bias voltage in the amplifier circuit and enhances the amplitude of the output signal; charging chip U1's LX external inductor pin 8 is connected to ground via resistor R1 and capacitor C1. Resistor R1 and capacitor C1 are connected in series to form an RC circuit to filter high-frequency signals; current-limiting resistor R2 is connected to the USB voltage VBUS at one end and to the VIN power input pin 6 of charging chip U1 at the other end to introduce input voltage. The VIN power input pin 6 of charging chip U1 is connected to ground via capacitor C4 to filter current; and voltage-stabilizing capacitor C5 is connected to the USB voltage VBUS at one end and to ground at the other end. The boost charging circuit boosts and charges the BAT battery through the boost module.

[0434] The portable fan's battery boost charging circuit incorporates a voltage stabilization and filtering circuit: The boost output VOUT of the charging chip U1 is boosted to output pin 2, which uses the output charging voltage to charge the BAT battery. Filter capacitors C3 and C6 are connected in parallel and connected to the VBAT voltage, with the other end grounded. The boost module NC (normally closed) is equipped with a diode D1, with the positive terminal of diode D1 connected to ground and the negative terminal connected to VBAT.

[0435] Capacitors C7, C8, and C9 are connected in parallel, with one end connected to pin 1, the intermediate node of the VSYS boost output of the charger chip U1, and the other end connected to ground. The voltage stabilization filter circuit filters the current and stabilizes the voltage at the charger output.

[0436] Pin 0 of the charging chip U1 is grounded.

[0437] The working principle of the boost module is as follows:

[0438] After the MOS tube connected to the inductor L1 in the charging chip U1 is turned on, the inductor L1 is grounded. As the current in the inductor L1 increases, the inductor L1 begins to store energy; after the MOS tube connected to the inductor L1 in the charging chip U1 is turned off, the inductor L1 releases the stored energy. At this time, the inductor L1 and the USB voltage VBUS are connected in series to achieve a boost effect, and the BAT battery is charged through the Boost synchronous boost circuit; the MOS tube of the charging chip U1 is controlled by its internal logic. When the charging chip U1 is not working, the MOS tube turns off the chip output to prevent the risk of leakage.

[0439] As shown in Figure 17-3 of the specification:

[0440] In one embodiment, the charging voltage preset module has the following features: a resistor R3 is provided, 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 electrical signal detected by R4. The battery boost charging circuit uses the charging voltage preset module to set the charging voltage.

[0441] In one embodiment, the overtemperature protection module has the following features: one end of thermistor R4 is connected to pin 3 of the NTC thermistor of the charging chip U1, and the other end is grounded. The charging chip U1 detects the voltage across thermistor R4 to determine the battery temperature, thereby implementing the overtemperature protection function of the charging module. The battery boost charging circuit implements the overtemperature protection function of the circuit through the overtemperature protection module.

[0442] 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.

[0443] As shown in Figure 17-4 of the specification:

[0444] In one embodiment, the battery boost charging circuit is equipped with a charging communication module, including: Pin 2 of interface J1 is 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 of interface J1 are connected to pull-down resistors R6 and R7, respectively, with the other ends of resistors R6 and R7 both grounded. By detecting the voltage values ​​of CC1 and CC2, functions such as cable connection and removal and socket / plug orientation can be identified; 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.

[0445] Capacitors C10 and C11 are connected to the USB voltage VBUS at one end and grounded at the other end to filter current, stabilize voltage, and avoid voltage spikes. The USB voltage VBUS is grounded through a discharge resistor R8 to avoid unnecessary power consumption.

[0446] As shown in Figure 17-5 of the specification:

[0447] In one embodiment, the battery boost charging circuit is further provided with circuit transfer interfaces BD, P1, and P2 for transferring circuit signals of the portable fan.

[0448] Interface BD is connected to the dip switch, receives the P_EN enable signal of 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.

[0449] The interface P1 receives the gear adjustment signals KEY, KEY_X, and KEY_Y of the portable fan, and transmits them to the main control chip of the portable fan through the interface P2 to control the start and stop and gear adjustment of the portable fan.

[0450] Interface P2 also receives the VBAT battery voltage, USB voltage VBUS, and PG signal transmitted by the charging chip U1, and transmits them to the main control chip of the portable fan.

[0451] Example 18, see Figures 18-1 to 18-3.

[0452] As shown in Figures 18-1 to 18-3 of the specification:

[0453] A charging management circuit for a portable fan includes at least one of a fast-charge management unit 300 and a charging management unit 400. The fast-charge management unit 300 includes a fast-charge communication module, a fast-charge control signal output module, a fast-charge voltage setting module, and a fast-charge current setting module. The charging management unit 400 includes a charging communication module, a charging driver 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 of a portable fan equipped with both the fast-charge management unit and the charging management unit can switch between fast-charge mode and standard boost charging mode.

[0454] Portable fans include: handheld fans, neck fans, desktop fans, waist-mounted fans, neck-mounted fans, head-mounted fans, etc.

[0455] 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.

[0456] The portable fan is connected to the battery pack 600 through the charging adapter 100, USB input unit 210, USB output unit 220 and fast charging management unit 300, charging management unit 400, and control unit 500 to power the battery pack 600; the fast charging management unit 300 and charging management unit 400 communicate with the charging adapter 100 through the USB interface.

[0457] The USB output unit 220 includes a USB interface J1 , the fast charge management unit 300 includes a power supply protocol chip (USB PD Sink) U2 , and the charging management unit 400 includes a charging chip U1 .

[0458] Pins A1B12 and A12B1 of USB interface J1 are grounded. The fast charge management unit 300 and the charging management unit 400 are connected to the VBUS pins A4B9 and A9B4 of USB interface J1 to accept an external power source. The DP data pin A6B6 and the DM data pin A7B7 of USB interface J1 are connected to the fast charge management unit 300 and the charging management unit 400 to identify the external power source. DP (data plus) and DM (data minus) are USB data signal lines.

[0459] In one embodiment, the power supply protocol chip U2 is connected to the USB interface J1 through the data signal line and configuration channel 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 pin A6B6 of the USB interface J1 through the current limiting resistor R1; the DM' data pin 3 of the power supply protocol chip U2 is connected to the DM data pin A7B7 of the USB interface J1 through the current limiting resistor R2; the CC1 configuration channel first pin 4 and the CC2 configuration channel second pin 5 of the power supply protocol chip U2 are respectively connected to the CC1 configuration channel first pin A5 and the CC2 configuration channel second pin B5 of the USB interface J1, and the CC1 configuration channel (Connection Configuration) first pin 4 and the CC2 configuration channel second pin 5 of the power supply protocol chip U2 are respectively grounded through capacitors C1 and C2, and the capacitors C1 and C2 are used to filter current and stabilize voltage. The fast charging communication module of the power acquisition protocol chip U2 is connected to the charging adapter 100 via a USB cable to establish a data mode (DM, DP communication) and a fast charging communication mode (Powered Device: PD2.0 / 3.0, Quick Connect: QC2.0 / 3.0, Appledivider3, Battery Charge: BC1.2 SDP, Digital Communication Protocol / Charging Downstream Port: DCP / CDP) for applying for, identifying, and monitoring the voltage required for charging the portable fan battery pack 600.

[0460] In one embodiment, the fast charge control signal output module includes: the power protocol chip U2 establishes fast charge communication with the charging adapter 100 by configuring the channel pins (pins 4 and 5); and outputs the fast charge drive signal through the fast charge drive pin 10.

[0461] In one embodiment, the VIN chip power supply pin 1 of the power protocol chip U2 is connected to VBUS via a current limiting resistor R3 , and the VIN chip power supply pin 1 of the power protocol chip U2 is grounded via a voltage stabilizing capacitor C3 .

[0462] The fast charging voltage setting module includes: the VSET voltage setting pin 8 of the power supply protocol chip U2 is grounded through the resistor R4, and the power supply protocol chip U2 obtains the voltage signal of the resistor R4, thereby setting the charging voltage of the battery pack 600 in the fast charging mode; the fast charging voltage of the battery pack 600 can be changed by changing the resistance value of R4.

[0463] The fast charging current setting module includes: the ISET current setting pin 9 of the power supply protocol chip U2 is grounded through the resistor R5, and the power supply protocol chip U2 obtains the voltage signal of the resistor R5, thereby setting the charging current of the battery pack 600 in the fast charging mode; the fast charging current of the battery pack 600 can be changed by changing the resistance value of R5.

[0464] The working principle of fast charging mode is as follows:

[0465] The power acquisition 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, sets the fast charging voltage by the monitored VSET voltage setting pin 8 signal, sets the fast charging current by the monitored ISET current setting pin 9 signal, outputs the fast charging drive signal through the GATE pin 10, and the charging head outputs a high voltage to fast charge the battery pack 600, and connects the 12C (serial bus) bus and the control unit 500 of the portable fan to communicate and transmit the fast charging status through the SDA (Serial Data line) pin 6 and the SCL (Serial Clock line) pin 7.

[0466] The VBUS charging input pin 1 of the charging chip U1 is connected to VBUS; one end of the voltage stabilizing 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 current and stabilize power supply.

[0467] In one embodiment, the charging communication module includes: DPC data positive signal pin 5 of the charging chip U1 is connected to the USB data positive signal through a current-limiting resistor R6, and DMC data negative signal pin 6 is connected to the USB data negative signal through a current-limiting resistor R7. The charging communication module is used by the charging chip U1 to identify the status of the external power supply.

[0468] In one embodiment, the charging drive module includes: the first pin 12 of the SW1 inductor and the second pin 13 of the SW2 inductor 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 the BT1 and the second bootstrap capacitor pin 14 of the 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 the capacitors C5 and C6 are bootstrap capacitors that provide a 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, which are connected in parallel with R8 and R9 and then grounded, which can be used to filter out high-frequency signals.

[0469] The VBAT charging output pin 3 of the charging chip U1 is connected to the battery pack 600. Filter capacitors C7, C8, C9, C10, and C11 are connected in parallel, with one end connected to pin 3 of the charging chip U1 and the other end grounded. The anode of diode D2 is grounded, and the cathode is connected to the VBAT charging output pin 3 of the charging chip U1. The charging chip U1 charges the battery pack 600 through a boost charging method using the charging driver module.

[0470] The working principle of normal charging mode is as follows:

[0471] The charging adapter 100 is an ordinary charging adapter. The charging chip U1 communicates with the charging adapter 100 by handshaking through the DPC data positive signal pins 5 and 6 to request a charging voltage. The charging chip U1 controls the internal integrated MOS tube circuit to charge and store energy for the inductor L1. Then the charging chip U1 turns on the MOS tube circuit to release the energy of the inductor L1. At this time, the inductor L1 and VBUS are connected in series to superimpose a voltage boosting effect, and the battery pack 600 is charged through the boost circuit.

[0472] The charging chip U1 has a step-up and step-down function. When the input voltage is lower than the charging voltage, the charging chip U1 increases 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 decreases the voltage to the charging voltage to charge the battery pack 600.

[0473] In one embodiment, the charging current detection module includes a connection between the positive current sampling pin 20 of the CSP of the charging chip U1 and the negative current sampling pin 21 of the CSN, via a sampling resistor R10, for sensing the charging current. Capacitors C12, C13, C14, and C15 are connected in parallel, with one end connected to the positive current sampling pin 20 of the CSP of the charging chip U1 and the other end grounded, for current filtering and voltage stabilization. The CSO sensing current monitoring pin 19 of the charging chip U1 is grounded via a resistor R11. The voltage of the CSO sensing current monitoring pin 19 of the charging chip U1 is proportional to the sensing charging current. The charging current detection module detects the charging current of the battery pack 600 through the charging chip U1.

[0474] In one embodiment, the termination voltage setting module: the CSE battery termination voltage setting pin 7 of the charging chip U1 is grounded through a resistor R12, and the resistance value of the resistor R12 is used to set the battery termination voltage in the charging mode.

[0475] In one embodiment, in the over-temperature protection module, the NTC thermistor pin 18 of the charging chip U1 is connected to ground via a resistor R14 .

[0476] 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.

[0477] Loop compensation module: The COMP loop compensation pin 17 of the charging chip U1 is connected to the RC circuit composed of resistor R15 and capacitor C17 and grounded to enhance the stability and transient response of the circuit.

[0478] The VCC chip working voltage output pin 9 of the charging chip U1 outputs the working voltage and is grounded through the voltage stabilizing capacitor C16.

[0479] Example 19, see Figures 19-1 to 19-3.

[0480] As shown in Figures 19-1 to 19-3 of the specification:

[0481] A portable handheld fan comprises a fan body 100 and a handheld portion 200 ; the fan body 100 is provided with an air outlet 110 and an air inlet 120 .

[0482] The air inlet 120 is located at the rear or side of the fan body 100, and the air outlet 110 is located at the front of the fan body 100. The portable handheld fan includes at least one of a cooling assembly and a spray assembly. The cooling assembly is located within the fan body 100 and is primarily used to cool the airflow passing through the fan body 100. The spray assembly is located on the handheld portion 200 and is primarily used to increase the humidity of the airflow, replenish moisture, and improve airflow comfort. The cooling and spray assemblies provide the portable handheld fan with at least one of cooling and atomizing functions, enhancing the cooling function and improving comfort.

[0483] 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 can be provided on the handheld portion 200; the toggle switch 220 is used to control the "lock" or "standby" state of the portable handheld fan. When the toggle switch 220 is in the "lock" 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 state 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 starting and stopping, cooling state, atomization state and wind speed adjustment and other working states of the portable handheld fan.

[0484] The operation process of the portable handheld fan is as follows:

[0485] 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 "lock" 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 through the mode switching wheel 210. In the standby mode, the user presses the mode switching wheel 210 to send a "start" working state 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 operate, causing the fan to blow air toward the air outlet, and the portable handheld fan is in the "blowing" mode. In the blowing mode, the user scrolls the mode switching wheel 210 upward to increase the wind speed of the portable handheld fan. In the blowing mode, the user scrolls the mode switching wheel 210 downward to decrease the wind speed of the portable handheld fan. In the blowing mode, the user presses the mode switching wheel 210 again to send a "stop" working state 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 operating.

[0486] The mode switch wheel 210 can also be used to switch to the following settings according to the usage scenario: strong wind mode, natural wind mode, breeze mode, cool wind mode, and water mist mode. When the mode switch wheel 210 is turned to "strong wind mode", the portable handheld fan blows out high-speed strong wind; when the mode switch wheel 210 is turned to "natural wind mode", the portable handheld fan blows out a natural wind speed; when the mode switch wheel 210 is turned to "gentle breeze mode", the portable handheld fan blows out a breeze speed; when the mode switch wheel 210 is turned to "cool wind mode", the cooling component is activated to cool the airflow passing through the fan body 100, and the portable handheld fan blows out a cool breeze; when the mode switch wheel 210 is turned to "water mist mode", the spray 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 out a mist-containing wind. The cool wind mode and water mist mode of the mode switch wheel 210 can be activated separately, simultaneously, or together with any of the wind speeds of strong wind mode, natural wind mode, and breeze mode.

[0487] In one embodiment, the cooling component includes a refrigeration device, which can be used to reduce the temperature of the surrounding air; the cooling component also includes an air duct 400, which is arranged in the fan body 100. The air duct 400 can be independently arranged in the fan barrel 310 of the fan body 100, or the air duct 400 can be arranged inside the fan barrel 310 of the fan body 100 to form an integral structure with the fan barrel 310. The fan barrel 310 is also used to carry the components of the cooling component of the portable handheld fan. The air duct 400 is used to guide the air flow to blow out evenly and improve the air outlet efficiency; the spray component includes an air compression device 720, a liquid guide tube 730, and an atomization part 740. The air compression device 720 can be an air compressor or an air compression pump, etc. The air compression device 720 presses the liquid into the atomization part 740 through the liquid guide tube 730, the atomization part 740 atomizes the liquid, and the portable handheld fan blows out liquid water mist through the spray component.

[0488] As shown in Figures 19-1 and 19-2 of the specification:

[0489] In one embodiment, a portable handheld fan has a cooling function. The cooling device includes a temperature conduction network 610, a heat conducting element 620, and a semiconductor cooling element 630. The temperature conduction network 610 increases the air contact area and improves the cooling effect; the semiconductor cooling element 630 reduces the temperature and produces a cool temperature; and the heat conducting element 620 conducts the temperature of the semiconductor cooling element 630. The temperature conduction network 610 and the heat conducting element 620 can be independent components or an integrated structure.

[0490] In one embodiment, a refrigeration device is arranged inside the air duct 400, and the semiconductor refrigeration component 630 is used to cool down and generate a cool temperature; the thermal conductive component 620 is provided with a limiting hole 640 for installing the semiconductor refrigeration component 630; the temperature conduction network 610 is installed outside the thermal conductive component 620 and is arranged inside the air duct 400, and is used to increase the contact area with the air inside the air duct 400 and enhance the cooling effect.

[0491] As shown in Figures 19-1 and 19-3 of the specification:

[0492] In one embodiment, a portable handheld fan has an atomizing function. The handheld portion 200 is provided with a liquid storage tank 710, an air compressor 720, a liquid conduit 730, and an atomizing unit 740. The air compressor 720 can be an air compressor or an air compressor pump. 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 the liquid into the liquid conduit 730. The liquid conduit 730 is used to transport the liquid. There are one or more atomizing nozzles 750. The atomizing unit 740 is used to atomize the liquid. The atomizing nozzle 750 is also used to spray the atomized liquid into the fan body 100.

[0493] 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 compression device 720 is disposed in the liquid storage tank 710 for pressurizing the liquid into the liquid guide tube 730; the liquid inlet of the liquid guide tube 730 is disposed in the liquid storage tank 710 to transmit the liquid into the atomization part 740; the atomization part 740 is disposed at the top of the handheld part 200, and there are one or more atomization nozzles 750, which atomize the liquid transmitted by the liquid guide tube 730 and send the atomized liquid into the fan body 100 through the atomization nozzle 750.

[0494] As shown in Figures 19-1 and 19-2 of the specification:

[0495] In one embodiment, the portable handheld fan has a cooling function. The fan body 100 includes a fan barrel 310, a fan rear cover 320, and a fan blade body 500. The fan barrel 310 is used to carry components of the cooling assembly of the portable handheld fan. The fan rear cover 320 and the fan barrel 310 are independent structures, or the fan rear cover 320 and the fan barrel 310 are an integral structure.

[0496] In one embodiment, the air duct 400 is installed inside the fan barrel 310. The air duct 400 can be independently set inside the fan barrel 310, or the air duct 400 can be set inside the fan barrel 310 to form an integral structure with the fan barrel 310. The fan barrel 310 is also used to carry components of the cooling assembly of the portable handheld fan. The fan blade body 500 is installed at the rear or inside of the air duct 400. The fan blade body 500 blows the wind into the fan barrel 310 and blows it out evenly through the air duct 400.

[0497] In one embodiment, the fan back cover 320 is set at the rear of the portable handheld fan and is provided with an air filter. Air enters the fan back cover 320 through the air inlet 120 and is filtered by the air filter. A layer of photocatalyst can also be set on the air filter to achieve a sterilization effect.

[0498] The portable handheld fan is also provided with a lanyard hole 230 ; the lanyard hole 230 is provided on the handheld portion 200 for installing a carrying lanyard or a hanging ornament, and the user can fix the portable handheld fan through the lanyard hole 230 .

[0499] The above embodiments merely represent preferred implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A portable fan, characterized in that: A portable fan includes: an air supply part and a handheld part, the handheld part is provided with a first connecting part, the air supply part is provided with a second connecting part, the air supply part and the handheld part are connected by a fixing part, the fixing part passes through the first connecting part and the second connecting part to connect the air supply part and the handheld part, part of the handheld part is embedded in the air supply part and / or part of the air supply part is embedded in the handheld part.

2. The portable fan according to claim 1, characterized in that: The air supply unit includes a fan base, a mixed flow fan arranged on the fan base, and a pressure seat covered on the mixed flow fan. The mixed flow fan is located at the front side of the fan base, and the mixed flow fan rotates around a rotating shaft to generate airflow.

3. The portable fan according to claim 2, characterized in that: The fan base includes an inner ring and an outer ring and a plurality of connecting strips connected between the inner ring and the outer ring, a limiting plate is connected between two of the connecting strips, a second connecting piece is provided on the limiting plate, a protrusion is provided at the end of the hand-held part, the first connecting piece is provided on the protrusion, and the first connecting piece and the second connecting piece are provided correspondingly.

4. The portable fan according to claim 3, characterized in that: The fixing member is a screw, and the first connecting member and the second connecting member are screw holes.

5. The portable fan according to claim 2, characterized in that: One of the first connecting member and the second connecting member is a connecting slot, and the other is a connecting buckle.

6. The portable fan according to claim 2, characterized in that: A slot is provided on the outer wall surface of the outer ring of the fan base close to the pressure seat, and a buckle is provided on the end of the pressure seat close to the fan base. The pressure seat is connected to the fan base, and the pressure seat is connected to the front side of the mixed flow fan.

7. The portable fan according to claim 2, characterized in that: A battery and a circuit board are arranged inside the handheld part, and the battery is electrically connected to the circuit board.

8. The portable fan according to claim 2, characterized in that: The air supply portion further includes a sleeve, and the pressure seat, the fan base, and the mixed flow fan are arranged in the sleeve to limit radial relative displacement of the pressure seat, the fan base, and the mixed flow fan.

9. The portable fan according to claim 2, characterized in that: The pressure seat includes a pressure surface that at least partially radially increases from an end away from the fan base to an end close to the fan base.

10. The portable fan according to claim 3, characterized in that: The side wall of the sleeve is provided with an assembly opening for the protrusion to pass through, and the sleeve is open at both ends; And / or, the portable fan further includes a three-phase high-speed motor, so as to improve the battery life by replacing the handheld part and / or the battery built into the handheld part in high-speed and high-energy consumption usage scenarios.

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