Portable fan

Abstract

The present invention provides a portable fan, which includes a blower unit and a handle unit, and a first connecting member is provided on the handle unit, a second connecting member is provided on the blower unit, the blower unit and the handle unit are connected via a fixing member, the fixing member passes through the first connecting member and the second connecting member, connecting the blower unit and the handle unit, a part of the handle unit is fitted into the blower unit and / or a part of the blower unit is fitted into the handle unit, and when the handle unit breaks down or the battery in the handle unit runs out, the handle unit can be replaced separately, and the replaced handle unit can be maintained or charged and replaced with a hand unit that operates normally or a hand unit with a different amount of electricity, thereby improving the durability of the product.

Description

[Technical Field]

[0001] The present invention relates to the technical field of electric fans, and in particular to portable electric fans. [Background technology]

[0002] Currently common portable fans are assembled by joining a front case and a rear case together. For example, if the portable fan breaks down, it is inconvenient to replace the battery, which makes maintenance complicated and reduces the durability of the fan. Summary of the Invention

[0003] In view of this, the present invention provides a portable fan that can improve the durability of use.

[0004] The present invention provides a portable fan comprising a blower unit and a handle unit, wherein a first connecting member is provided on the handle unit, a second connecting member is provided on the blower unit, the blower unit and the handheld unit are connected via a fixing member, the fixing member passes through the first connecting member and the second connecting member, and connects the blower unit and the handheld unit, and a portion of the handheld unit is fitted into the blower unit and / or a portion of the blower unit is fitted into the handheld unit.

[0005] In the portable handheld fan of the present invention, when the handle breaks down or the battery in the handle runs out, the handle can be replaced separately, the replaced handle can be maintained or charged, and then replaced with a handle that is in normal operation or a handle with a different amount of electricity, thereby increasing the service life of the product. [Brief explanation of the drawings]

[0006] [Figure 1-1] 1 is a perspective view of a portable electric fan according to the present invention; [Figure 1-2] FIG. 1 is an exploded schematic view of the electric fan shown in FIG. [Figure 1-3] FIG. 3 is an exploded schematic view of the electric fan shown in FIG. 1-2 with the sleeve removed. [Figure 1-4] 1 is a structural schematic diagram of a fan base of a portable electric fan according to the present invention; [Figure 1-5] 1 is a structural schematic diagram of a pressure base of a portable electric fan according to the present invention; [Figure 1-6] 1 is a schematic diagram of the structure of a sleeve of a portable electric fan according to the present invention; [Figure 2-1] 1 is a perspective view of a first embodiment of a portable fan according to the present invention; [Figure 2-2] 1 is a cross-sectional view of a first embodiment of a portable fan according to the present invention. [Figure 2-3] FIG. 2-2 is an enlarged view of part A in FIG. [Figure 2-4] 3 is a cross-sectional view of the first embodiment of the portable fan according to the present invention in another direction. FIG. [Figure 2-5] FIG. 3 is a cross-sectional view of a second embodiment of a portable fan according to the present invention. [Figure 2-6] FIG. 10 is a cross-sectional view of a third embodiment of a portable fan according to the present invention. [Figure 3-1] FIG. 3 is a schematic diagram of a blower unit according to Example 3-1 of the present invention. [Figure 3-2] FIG. 3-2 is an exploded schematic view of the blower unit shown in FIG. [Figure 3-3] FIG. 3 is a cross-sectional schematic view of a blower according to Example 3-1 of the present invention. [Figure 3-4] FIG. 2 is a schematic diagram of the display. [Figure 3-5] FIG. 4 is a schematic assembly diagram of the inner case. [Figure 3-6] FIG. 3 is a schematic diagram of a portable electric fan according to Example 3-2 of the present invention. [Figure 3-7] FIG. 3 is a cross-sectional view of a portable electric fan according to Example 3-2 of the present invention. [Figure 4-1] 1 is a schematic diagram of the three-dimensional structure of a handheld fan according to an embodiment of the present invention; [Figure 4-2] 10 is a schematic diagram of the three-dimensional structure of the handheld fan according to the embodiment of the present invention, seen from another angle. FIG. [Figure 4-3] FIG. 2 is a schematic diagram of the three-dimensional structure of a partial structure of an example of the present invention. [Figure 4-4] FIG. 1 is an exploded view of an embodiment of the present invention. [Figure 4-5] 2 is a schematic diagram of an air volume adjustment circuit according to an embodiment of the present invention; [Figure 4-6] 2 is a schematic diagram of an air volume adjustment circuit according to an embodiment of the present invention; [Figure 5-1] 1 is a schematic diagram of the three-dimensional structure of a handheld fan according to an embodiment of the present invention; [Figure 5-2] 10 is a schematic diagram of the three-dimensional structure of the handheld fan according to the embodiment of the present invention, seen from another angle. FIG. [Figure 5-3] FIG. 2 is a schematic diagram of the three-dimensional structure of a partial structure of an example of the present invention. [Figure 5-4] FIG. 1 is an exploded view of an embodiment of the present invention. [Figure 5-5] 2 is a schematic diagram of an air volume adjustment circuit according to an embodiment of the present invention; [Figure 5-6] 2 is a schematic diagram of an air volume adjustment circuit according to an embodiment of the present invention; [Figure 6-1] 1 is a structural schematic diagram of a handheld structure used in a handheld fan according to an embodiment of the present invention; [Figure 6-2] 1 is a structural schematic diagram of a mounting frame and a circuit board assembly in a handheld structure used in a handheld fan according to an embodiment of the present invention; [Figure 6-3] 1 is a structural schematic diagram of a shift knob assembly and a battery in a handheld structure used in a handheld fan according to an embodiment of the present invention; [Figure 6-4] 2 is a structural schematic diagram of a protective switch button assembly in a handheld structure used in a handheld fan according to an embodiment of the present invention; FIG. [Figure 6-5] 1 is a structural schematic diagram of a handheld portion and a blowing structure in a handheld structure used in a handheld fan according to an embodiment of the present invention. [Figure 6-6] 10 is a structural schematic diagram of a clamp plate in a handheld structure used in a handheld fan according to an embodiment of the present invention. FIG. [Figure 6-7] 3 is a structural schematic diagram of a first support plate and a second support plate in a handheld structure used in a handheld fan according to an embodiment of the present invention. FIG. [Figure 6-8]1 is a structural schematic diagram of a storage space in a handheld structure used in a handheld fan according to an embodiment of the present invention; [Figure 6-9] 3 is a structural schematic diagram of a separator in a handheld structure used in a handheld fan according to an embodiment of the present invention; FIG. [Figure 6-10] 3 is a structural schematic diagram of a first protrusion and a second protrusion in a hand-held structure used in a hand-held fan according to an embodiment of the present invention. FIG. [Figure 7-1] 1 is a structural schematic diagram of a handheld fan according to an embodiment of the present invention; [Figure 7-2] 2 is a structural schematic diagram of a mounting frame of a handheld fan according to an embodiment of the present invention; FIG. [Figure 7-3] 1 is a structural schematic diagram of a handheld case of a handheld fan according to an embodiment of the present invention; [Figure 7-4] 1 is a structural schematic diagram of a control mechanism in a handheld fan according to an embodiment of the present invention. [Figure 7-5] 3 is a structural schematic diagram of a mounting groove in a handheld fan according to an embodiment of the present invention. FIG. [Figure 7-6] 2 is a structural schematic diagram of an outer case of a handheld fan according to an embodiment of the present invention; FIG. [Figure 7-7] 3 is a structural schematic diagram of a first circuit board in a handheld fan according to an embodiment of the present invention. FIG. [Figure 7-8] 2 is a structural schematic diagram of an inner case of a handheld fan according to an embodiment of the present invention; FIG. [Figure 8-1] 1 is a structural schematic diagram of a blower device of a handheld fan according to an embodiment of the present invention; [Figure 8-2] 1 is a structural schematic diagram of a mounting frame of a blower device for a handheld fan according to an embodiment of the present invention; [Figure 8-3] 1 is a structural schematic diagram of a handheld portion of a blower device for a handheld fan according to an embodiment of the present invention; [Figure 8-4] 3 is a structural schematic diagram of a wiring opening in a blower device of a handheld fan according to an embodiment of the present invention. FIG. [Figure 8-5] 1 is a structural schematic diagram of a wiring groove in a blower device of a hand-held fan according to an embodiment of the present invention; [Figure 8-6] 2 is a structural schematic diagram 2 of a wiring groove in the air blower of the hand-held fan according to the embodiment of the present invention. [Figure 8-7] 2 is a structural schematic diagram of a shift knob assembly and a protective switch button assembly in a handheld fan blower according to an embodiment of the present invention; FIG. [Figure 8-8] 2 is a structural schematic diagram of an inner case and an outer case in a blower device of a handheld fan according to an embodiment of the present invention; FIG. [Figure 8-9] 2 is a structural schematic diagram of an air intake and an air exhaust in a blower of a handheld fan according to an embodiment of the present invention; FIG. [Figure 8-10] FIG. 8 is a partially enlarged structural schematic diagram of part A in FIG. 8-9. [Figure 8-11] 1 is a structural schematic diagram of a fan assembly in a blower device for a handheld fan according to an embodiment of the present invention; [Figure 9-1] 1 is a structural schematic diagram of a blower mechanism of a handheld fan according to an embodiment of the present invention; [Figure 9-2] 2 is a structural schematic diagram of a case and a support frame in a blower mechanism of a handheld fan according to an embodiment of the present invention; FIG. [Figure 9-3] 3A and 3B are structural schematic diagrams of stopper ribs in the air blowing mechanism of the handheld fan according to the embodiment of the present invention; [Figure 9-4] 2 is a structural schematic diagram of an exhaust port in a blower mechanism of a handheld fan according to an embodiment of the present invention. FIG. [Figure 9-5] 2 is a structural schematic diagram of an air intake in a blower mechanism of a handheld fan according to an embodiment of the present invention. FIG. [Figure 9-6] 3 is a structural schematic diagram of a sleeve and an intake cover in a blower mechanism of a handheld fan according to an embodiment of the present invention. FIG. [Figure 10-1] 1 is a schematic diagram of a handheld fan according to an embodiment of the present invention; [Figure 10-2] 1 is an exploded schematic view of a handheld fan according to an embodiment of the present invention; [Figure 10-3] 1 is a schematic diagram of an intake cover according to an embodiment of the present invention. [Figure 10-4]FIG. 2 is a schematic diagram of air passage formation according to an embodiment of the present invention. [Figure 10-5] 1 is a schematic diagram of a blade according to an embodiment of the present invention. [Figure 10-6] FIG. 2 is a bottom view of the blower unit according to the embodiment of the present invention. [Figure 10-7] 1 is a schematic diagram showing a motor shaft and blades integrally molded according to an embodiment of the present invention; [Figure 10-8] 1 is a schematic diagram of a damper spring according to an embodiment of the present invention. [Figure 10-9] FIG. 2 is a connection diagram of a handheld unit and a blower unit according to an embodiment of the present invention. [Figure 11-1] 1 is a perspective view of a handheld fan according to the present invention; [Figure 11-2] 1 is an exploded view of a handheld fan according to the present invention. [Figure 11-3] 1 is a perspective view of an intake cover of a handheld fan according to the present invention; [Figure 11-4] 2 is a cross-sectional view taken along the line AA of the handheld electric fan according to the present invention. FIG. [Figure 11-5] 1 is a perspective view of a blower assembly of a handheld fan according to the present invention, taken in a certain direction; [Figure 11-6] FIG. 2 is a perspective view of the blower assembly of the handheld fan according to the present invention, viewed from another direction. [Figure 12-1] 1 is a perspective view of a handheld fan according to the present invention; [Figure 12-2] 2 is a cross-sectional view taken along the line AA of the handheld electric fan according to the present invention. FIG. [Figure 12-3] FIG. 2 is another perspective view of the handheld fan according to the present invention. [Figure 12-4] 1 is a perspective view of an intake cover of a handheld fan according to the present invention; [Figure 12-5] 1 is a perspective view of a first side wall of a handheld fan according to the present invention. FIG. [Figure 13-1] 1 is a perspective view of a handheld fan according to an embodiment of the present invention; [Figure 13-2] 1 is an exploded perspective view of a handheld fan according to an embodiment of the present invention; [Figure 13-3]1 is an exploded perspective view of a blower unit of a handheld fan according to an embodiment of the present invention; [Figure 13-4] 1 is a wiring diagram of a handheld fan according to an embodiment of the present invention. [Figure 13-5] FIG. 2 is a perspective view of the handheld fan according to the embodiment of the present invention, seen from another angle. [Figure 13-6] 1 is a schematic cross-sectional view of a handheld fan according to an embodiment of the present invention. [Figure 14-1] 1 is a schematic diagram of a handheld fan according to an embodiment of the present invention; [Figure 14-2] 1 is an exploded schematic view of a handheld fan according to an embodiment of the present invention; [Figure 14-3] FIG. 2 is a schematic diagram of a blower according to an embodiment of the present invention. [Figure 14-4] 1 is a cross-sectional view of a handheld fan according to an embodiment of the present invention. [Figure 14-5] 1 is a schematic diagram of a blower assembly according to an embodiment of the present invention; [Figure 14-6] FIG. 1 is a schematic diagram of an impeller assembly according to an embodiment of the present invention. [Figure 14-7] FIG. 2 is a connection diagram of a handheld unit and a blower unit according to an embodiment of the present invention. [Figure 15-1] 1 is a perspective view of a handheld fan according to an embodiment of the present invention; [Figure 15-2] 1 is an exploded perspective view of a handheld fan according to an embodiment of the present invention; [Figure 15-3] 1 is an exploded perspective view of a blower unit of a handheld fan according to an embodiment of the present invention; [Figure 15-4] FIG. 2 is a perspective view of the handheld fan according to the embodiment of the present invention, seen from another angle. [Figure 15-5] 1 is a wiring diagram of a handheld fan according to an embodiment of the present invention. [Figure 15-6] 1 is a schematic cross-sectional view of a handheld fan according to an embodiment of the present invention. [Figure 16-1] FIG. 2 is a block diagram of a motor drive control circuit of the portable electric fan. [Figure 16-2] FIG. 2 is a circuit principle diagram of a voltage stabilization unit. [Figure 16-3]FIG. 1 is a diagram illustrating the principle of a motor drive control circuit. [Figure 16-4] FIG. 1 is a diagram illustrating the principle of a rotor position detection circuit. [Figure 16-5] FIG. 2 is a circuit diagram of a motor drive control unit. [Figure 16-6] FIG. 2 is a circuit principle diagram of the main control unit. [Figure 16-7] FIG. 2 is a circuit principle diagram of a display unit. [Figure 17-1] FIG. 1 is a block diagram of a battery boost charging circuit for a portable electric fan. [Figure 17-2] This is a boost module circuit for the battery boost charging circuit of a portable electric fan. [Figure 17-3] This is a charging voltage preset module, an over-temperature protection module, and a charging status indication module for a battery boost charging circuit of a portable fan. [Figure 17-4] This is a USB interface circuit for a battery boost charging circuit for a portable fan. [Figure 17-5] This is a signal transmission module for the battery boost charging circuit of a portable fan. [Figure 18-1] FIG. 2 is a block diagram of a charging management circuit of the portable electric fan. [Figure 18-2] USB interface, quick charge management unit circuit principle diagram. [Figure 18-3] FIG. 2 is a circuit principle diagram of a charge management unit. [Figure 19-1] FIG. 1 is a side view of a portable handheld fan. [Figure 19-2] FIG. 1 is a structural diagram of a cooling assembly for a portable handheld fan. [Figure 19-3] FIG. 1 is a structural diagram of a spray assembly of a portable handheld fan. DETAILED DESCRIPTION OF THE INVENTION

[0007] To facilitate an understanding of the present invention, the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown. However, the present invention may be embodied in many different forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more complete understanding of the present disclosure.

[0008] In describing the present invention, the orientations or positional relationships indicated by the terms "front," "rear," "top," "inside," "outside," etc. are based on the orientations or positional relationships shown in the drawings, and are merely for the convenience and simplification of the description of the present invention. They do not indicate or imply that a specified device or element must have a specific orientation or be configured and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0009] In describing the embodiments of the present invention, unless otherwise stated, " / " means "or", for example, A / B can represent A or B, and "and / or" in the document only refers to a relationship that describes related objects, and three relationships may exist, for example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. In describing the embodiments of the present invention, "plurality" means two or more, and other quantifiers should be understood similarly. The preferred embodiments described herein are merely for explaining and interpreting the present invention, not for limiting the present invention, and the embodiments and features thereof may be combined with each other where there is no conflict.

[0010] While the terms "first," "second," and the like may be used herein to describe various elements, components, regions, layers, and / or sections, it should be understood that these elements, components, regions, layers, and / or sections are not limited by these terms. These terms are used solely to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, without departing from the teachings of the exemplary embodiments, a first element, component, region, layer, or section described below may be referred to as a second element, component, region, layer, or section. Spatially relative terms, such as "upper," "lower," and the like, 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 the device during use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures were inverted, an element or feature labeled "lower" would be oriented relative to the other element or feature "above." Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be oriented (rotated 90 degrees or at other orientations) and the spatially related descriptors used herein interpreted accordingly. In the present invention, references to "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply the relative importance thereof or to implicitly specify the number of technical features indicated. It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element, or intermediate elements may also be present.

[0011] At the same time, in the embodiments of the present invention, when a member is said to be "fixed" to another member, it may be directly fixed to the other member, or an intermediate member may be present. When a member is said to be "connected" to another member, it may be directly connected to the other member, or an intermediate member may also be present. When a member is said to be "disposed on" another member, it may be directly disposed on the other member, or an intermediate member may also be present. 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 be limiting.

[0012] Example 1 refers to those shown in Figures 1-1 to 1-6.

[0013] Referring to FIG. 1-1 , in this embodiment, the portable fan 100 is a handheld fan having a handle 11 (not shown, the same applies below), and the user can wear the portable fan 100 via the handle 11. Of course, the portable fan 100 may be, but is not limited to, a clamp fan having a clip, a handheld fan (a macky fan) having a bending fixture for winding, a tabletop fan having a bracket, or a floor-standing fan having an extendable bracket. A semiconductor cooling element (not shown, the same applies below) may be provided in the handle 11, allowing the user to carry the portable fan 100. At the same time, the semiconductor cooling element can automatically adjust the cooling temperature according to the temperature of the part that comes into contact with the user, improving the user's comfort when carrying the portable fan. In addition, the portable fan 100 is used for heat dissipation and temperature reduction, and is provided with a corresponding semiconductor cooling element to improve the user's portability. Of course, a heating element (not shown) may also be added to the portable fan 100, and the portable fan 100 may be used for heat retention and heating, and is provided with a corresponding heating element (not shown) to automatically adjust the temperature of the part that comes into contact with the human body, warm the part that comes into contact with the human body, and improve the user's portability.

[0014] Referring to FIG. 1-1, in this embodiment, a battery (not shown, same below) can be accommodated inside the handle 11, and a switch button (not shown, same below) and a charging port (not shown, same below) are provided in an exposable manner on the handle 11, the battery supplies power to the portable fan 100, the switch button is for adjusting the wind speed and opening / closing, and the charging port is for connecting an external power source to charge the battery. If the portable fan 100 is another type of fan (for example, the above-mentioned clamp fan, handheld fan (Macky), table fan, etc.), the positions of the battery, switch button, and charging port can be adjusted accordingly.

[0015] 1-1 to 1-6, a portable electric fan 100 includes a blower unit 10 and a hand-held unit 11, the blower unit 10 and the hand-held unit 11 are connected via a fixing member 12, the hand-held unit 11 is provided with a first connecting member 13, the blower unit 10 is provided with a second connecting member 14, the fixing member 12 passes through the first connecting member 13 and the second connecting member 14 to connect the blower unit 10 and the hand-held unit 11, and the end of the hand-held unit 11 The handle 11 has a protrusion 16 extending along the longitudinal direction of the handle 11, the protrusion 16 being inserted into the blower 10, the first connecting member 13 being provided on the protrusion 16, the blower 10 having a stopper plate 17, the stopper plate 17 having a second connecting member 14 opened thereon, the fixing member 12 passing through the first connecting member 13 and the second connecting member 14 to connect the handle 11 and the blower 10. If the handle 11 breaks down or the battery in the handle 11 runs out, the handle 11 can be replaced separately, and the replaced handle 11 can be maintained or charged, and then replaced with a handle 11 that is in working order or has a different electrical capacity, thereby increasing the service life of the product.

[0016] Referring to Figures 1-1 to 1-3, a structural design in which a portion of the structure of the handle portion 11 is fitted into the air blowing portion 10, or a portion of the air blowing portion 10 is fitted, embedded, or inserted into the handle portion 11, can improve the connection stability between the handle portion 11 and the air blowing portion 10 and prevent movement.

[0017] 1-4 to 1-5, the blower section 10 includes a fan base 18, a mixed flow fan 19 provided on the fan base 18, and a pressurizing table 25 provided to cover the mixed flow fan 19, the mixed flow fan 19 being located in front of the fan base 18 and rotating around a rotation axis to generate an airflow, and the pressurizing table 25 being located in front of the mixed flow fan 19 and including a pressurizing surface that increases at least partially radially from one end remote from the fan base 18 to one end close to the fan base 18.

[0018] 1-4, the fan base 18 includes an inner ring 20, an outer ring 21, and a plurality of connecting ribs 22 connected between the inner ring 20 and the outer ring 21. The inner ring 20 and the outer ring 21 are connected via the connecting ribs 22. A stopper plate 17 is connected between the two connecting ribs 22. The stopper plate 17 is provided with a second connecting member 14. During assembly, the protrusion 16 is inserted between the two connecting ribs 22 to limit the relative displacement of the fan base 18 in the circumferential direction. The first connecting member 13 on the protrusion 16 and the second connecting member 14 on the stopper plate 17 are aligned. The fixing member 12 connects the protrusion 16 and the stopper plate 17 to limit the axial movement of the fan base 18 and perform a fixing function. It should be understood that the fixing member 12 may be a screw, a pin, or an adhesive, as long as it can fix the protrusion 16 and the stopper plate 17.

[0019] In another embodiment, one of the first connecting member 13 and the second connecting member 14 is a connecting locking groove 23, and the other is a connecting buckle 24, and the connecting locking groove 23 and the connecting buckle 24 are of a conventional design, and the handle part 11 and the blower part 10 are connected via the connecting locking groove 23 and the connecting buckle 24, and connecting in this manner makes assembly efficient.

[0020] 1-4 to 1-5, an engaging groove 23 is provided on the outer wall surface of one end of the outer ring 21 of the fan base 18 that is close to the pressure table 25, and a buckle 24 is provided on one end of the pressure table 25 that is close to the fan base 18, so that the pressure table 25 is connected to the fan base 18, which makes assembly easy and efficient.

[0021] 1-1 to 1-6, a battery and a circuit board are provided inside the handle 11, and the battery is electrically connected to the circuit board via a conductor and controls the starting rotation of the mixed flow fan 19.

[0022] 1-3 and 1-6, the blower unit 10 further includes a sleeve 26, in which the pressure table 25, the fan base 18, and the mixed flow fan 19 are mounted, restricting the pressure table 25, the fan base 18, and the mixed flow fan 19 from moving radially along the sleeve 26 and allowing them to move axially only through the openings at both ends of the sleeve 26, preventing displacement and protecting the internal structure.

[0023] 1-6, a mounting hole 27 for passing the protrusion 16 is provided on the side wall of the sleeve 26, and the mounting hole 27 is provided for passing the protrusion 16 therethrough.

[0024] 1-5, support columns 28 are provided on the outer wall of the pressure table 25, two support columns 28 extending along the radial direction of the pressure table 25, and the two support columns 28 are connected by an arc-shaped plate 29, which is connected to the ends of the two support columns 28. The support columns 28 and the arc-shaped plate 29 support the inner wall of the sleeve 26, preventing the sleeve 26 from collapsing under external pressure and preventing the pressure table 25 from being pulled and deformed when the handle 11 is pulled downward, causing the inner wall of the pressure table 25 to collide with the blades and cause a malfunction.

[0025] The portable fan further includes a three-phase high-speed motor, and in situations where high rotation speeds and high energy consumption are involved, the durability can be improved by replacing the handheld portion and / or the battery built into the handheld portion.

[0026] Example 2 refers to those shown in Figures 2-1 to 2-6.

[0027] 2-1 and 2-2 are schematic diagrams of a first embodiment of a portable fan of the present invention. The portable fan includes a case 1, a fan assembly 2, a motor 3, and a drive circuit board 4. The case 1 is provided with an air intake 161, a housing cavity 162, and an exhaust port 163, which are in communication with each other. The fan assembly 2, the motor 3, and the drive circuit board 4 are housed within the case 1. The drive circuit board 4 is electrically connected to the motor 3 to drive and rotate the fan assembly 2, causing air to blow from the air intake 161, through the housing cavity 162, and out the exhaust port 163.

[0028] As shown in Figures 2-1 and 2-2, the case 1 includes a front case 11 and a rear case 12. The front case 11 includes a first wind case 111 and a first handle case 112. The rear case 12 includes a second wind case 121 and a second handle case 122. The first wind case 111 and the second wind case 121 form an exhaust section 16, and the first handle case 112 and the second handle case 122 form a handle part 17. The first wind case 111 and the second wind case 121 may be fitted together front to back or left to right, and the first handle case 112 and the second handle case 122 may be fitted together front to back or left to right. The handle part 17 is provided with a switch 5, an interface 6, and a battery 7. In this embodiment, the switch 5 is a variable speed switch 5. Of course, in other embodiments, the first handheld case 112 and the second handheld case 122 may not be provided, or may be provided in other common forms such as a desk fan, a neck fan, a clamp fan, a bracket fan, etc.

[0029] As shown in Figures 2-2 to 2-4, the first wind case 111 includes a first outer case and a first inner case that fit together, the first inner case and the first outer case are installed in close contact with each other, and both the first inner case and the first outer case extend horizontally forward. The second wind case 121 includes a second outer case and a second inner case that fit together, the rear ends of the second inner case and the second outer case are connected by a connecting member with a gap between them, the second outer case extends horizontally forward, the second inner case extends horizontally from rear to front and then expands radially outward, the front end of the second inner case is connected to the front end of the second outer case and abuts against the rear end of the first inner case. In this embodiment, the first outer case and the second outer case are integrally molded; however, in other embodiments, the first outer case and the second outer case may be separately molded. The first and second wind cases 111 and 121 are both double-layered case-1 structures, which provide a more stable structure and allow the second inner case to change shape to better compress the wind, resulting in stronger wind power and a longer airflow distance. In other embodiments, the first and / or second wind cases 111 and / or 121 may be single-layered case-1 structures.

[0030] 2-1 and 2-2, the case 1 further includes a pressure member 13 provided in the first wind case 111, and a plurality of connecting blades 14 connect the pressure member 13 and the front case 11. A base 131 and a sleeve 132 are formed in the pressure member 13, and the base 131 is located between the front and rear ends of the pressure member 13. A retreat space 1321 is formed rearward within the pressure member 13, and a storage section 1322 is formed forward within the base 131. The sleeve 132 protrudes from the base 131 into the storage cavity 162, i.e., the sleeve 132 protrudes rearward from the base 131, and the sleeve 132 is hollow.

[0031] As shown in FIGS. 2-1 and 2-2, the intake port 161 is located in a radially inner region of the second inner case, and the exhaust port 163 is located in a region radially between the pressurizing member 13 and the first inner case. The fan assembly 2 includes a hub 21 and a plurality of blades 22 spaced apart from one another on the outer surface of the hub 21. The hub 21 includes an air guide surface 212 that increases radially from rear to front, and the pressurizing member 13 includes a pressurizing surface 133 that increases radially from rear to front. The air guide surface 212 and the pressurizing surface 133 are adjacently spaced apart to blow air smoothly forward. A radially outward air passage is formed from the intake port 161 to the exhaust port 163, pressurizing the air within the case 1 and forming a large exhaust surface.

[0032] As shown in FIGS. 2-1 to 2-4, the fan assembly 2 includes the hub 21 and a plurality of blades 22 spaced apart from one another on the outer surface of the hub 21, with a rotating shaft 23 fixed to the center inside the hub 21. The motor 3 includes the stator 31 and the rotor 32, both of which are housed within the hub 21. The hub 21 further includes an annular extension wall 211 that extends around the hub 21, with both of which are housed within the extension wall 211. The stator 31 is fitted onto the sleeve 132, the stator 31 includes a coil 311, and the rotor 32 is disposed radially 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 are inserted forward into the retraction space 1321.

[0033] 2-1 and 2-2 , the extension wall 211 extends forward beyond the air guide surface 212, and the air guide surface 212 and the pressure applying surface 133 are installed adjacent to each other with a gap therebetween. Therefore, if the gap between the air guide surface 212 and the pressure applying surface 133 is shifted from the front end of the extension wall 211, dust and dirt are less likely to enter the extension wall 211. The extension wall 211, the stator 31, and the rotor 32 are inserted forward into the evacuation space 1321 so that neither the stator 31 nor the rotor 32 extends forward beyond the extension wall 211, and portions of the extension wall 211, the stator 31, and the rotor 32 are accommodated in the evacuation space 1321.

[0034] 2-1 and 2-2 , the drive circuit board 4 is not provided between the base 131 and the stator 31, the battery 7 is electrically connected to the drive circuit board 4, and the drive circuit board 4 is electrically connected to the lead wire of the coil 311 to drive the fan assembly 2 to rotate, and the air flows from the intake port 161 through the accommodating cavity 162 and out the exhaust port 163. In this embodiment, the drive circuit board 4 is accommodated in the accommodating portion 1322 formed facing forward on the base 131, and the front end of the pressing member 13 further includes a front cover 15, which covers the front end of the accommodating portion 1322 and is recessed rearward to form a negative pressure region 151. By providing the front cover 15, on the one hand, the accommodating section 1322 is covered and the drive circuit board 4 is shielded and protected, and on the other hand, the negative pressure area 151 formed by the front cover 15 being recessed backward can supply air to the exhaust port 163 and increase the air volume of the exhaust port 163.

[0035] 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 12 windings. Due to the large number of windings, the internal space of the motor 3 is limited. By not providing the drive circuit board 4 between the base 131 and the stator 31, the electrical connection between the lead wires of the coil 311 and the drive circuit board 4 is simpler and more convenient. At the same time, the space between the base 131 and the stator 31 is smaller, making the distribution of the internal space of the portable fan more rational and realizing the miniaturization of the portable fan.

[0036] 2-5 is a schematic diagram of a second embodiment of the portable electric fan of the present invention. The main difference from the first embodiment is that the drive circuit board 4 is housed in the handle 17 and is located between the switch 5 and the interface 6, and the switch 5 is connected to the drive circuit board 4, or the interface 6 is connected to the drive circuit board 4. The other structure and performance are almost the same as those of the first embodiment, and will not be described here.

[0037] 2-6 is a schematic diagram of a third embodiment of the portable electric fan of the present invention. The main difference from the first embodiment is that the drive circuit board 4 is housed in the handle 17 and is located below the battery 7. The rest of the structure and performance are almost the same as those of the first embodiment, so a description thereof will be omitted here.

[0038] In the portable fan of this embodiment, the drive circuit board is not arranged between the base and the stator, which makes the electrical connection between the lead wire of the coil and the drive circuit board simpler and more convenient; at the same time, the space between the base and the stator is smaller, making the distribution of the internal space of the portable fan more rational, which has the beneficial effect of realizing the miniaturization of the portable fan.

[0039] Example 3-1 refers to those shown in Figures 3-1 to 3-5.

[0040] The portable fan includes a blower unit 100. As shown in FIGS. 3-1 to 3-3, the blower unit 100 includes a case 1 having a storage compartment, a blower assembly 2 provided in the storage compartment of the case 1, a display 3 provided at the front end of the case 1, an exhaust port provided along the outer periphery of the display 3, and an intake port provided at the rear end of the case 1. The display 3 is used to display an operating state. In this embodiment of the present invention, the front end refers to a direction toward one end of the user during use, the rear end refers to a direction away from the one end of the user during use, the inside refers to a direction toward the central axis of the case 1, the outside refers to a direction away from the central axis of the case 1, and the top refers to a direction in which the handheld portion 200 faces the blower unit 100. During use, the display 3 is used to display the remaining battery level, the current wind speed, and the amount of electricity charged during charging.

[0041] As shown in Figures 3-4, the display 3 is disposed in correspondence with the central axis region of the accommodation chamber, and at least a portion of the display 3 is a curved surface concave from the front end to the rear end of the case 1. Preferably, in this embodiment, the display 3 is concave from the central axis toward the rear end of the case 1 along the axial direction, so that the front surface of the display 3 has a concave mirror shape. The front plane of the display 3 is concave toward the rear end of the case 1, and by collecting the airflow flowing out from the exhaust port in the region corresponding to the display 3, the airflow blown out from the portable fan is more collected, improving the blowing effect, improving the user experience, saving energy, and increasing the usage duration of the portable fan. As shown in FIG. 3-3, in some embodiments, the plane surrounded by the edge of the display 3 is lower than the plane surrounded by the front edge of the case 1, i.e., the plane surrounded by the display 3 is closer to the air intake port than the plane surrounded by the front edge of the case 1, allowing the display 3 to be installed within the cavity of the case 1, providing protection for the display 3 and preventing wear or stress damage to the display 3.

[0042] 3-2 to 3-5, the case 1 includes an inner case 11 and an outer case 12 fitted around the inner case 11. The inner case 11 includes a first inner case 111 and a second inner case 112, arranged from front to rear. A connection base 4 for mounting the display 3 is provided in a region of the housing chamber corresponding to the rear of the display 3. A number of reinforcing plates 41 are provided between the outer periphery of the connection base 4 and the inner wall of the first inner case 111. The reinforcing plates 41 are uniformly distributed along the outer periphery of the connection base 4 and divide the exhaust port into a number of sub-exhaust ports uniformly distributed around the periphery of the display 3. In some embodiments, the cross section of the sub-exhaust port along the radial direction of the outer case 12 is trapezoidal. The reinforcing plates 41 connect the connection base 4 to the inner wall of the first inner case 111 and provide support for the first inner case 111, thereby increasing the strength of the first inner case 111. A mating connection structure is provided on the outer wall of the inner case 11 and the inner wall of the outer case 12. In some embodiments, the mating connection structure includes a connecting groove provided on the outer wall of the inner case 11 along the axial direction, and a connecting protrusion provided on the inner wall of the outer case 12 and mated with the connecting groove, the mating of the connecting groove and the connecting protrusion providing a guide for the outer contact between the inner case 11 and the outer case 12, preventing relative rotation between the inner case 11 and the outer case 12, and improving the connection stability between the inner case 11 and the outer case 12.

[0043] The display 3 and the connecting base 4 are connected by a first snap-fit ​​assembly, which includes first snaps 31 provided circumferentially on the rear side of the display 3 and first sprags 42 provided at the front end of the mounting seat and engaged with the first snaps 31. The first snaps extend from the rear side of the display toward the air intake port, and have a slope on the outer side of the rear end of the first snaps 31. Providing the slope reduces resistance when the first snaps 31 and the first sprags 42 are mated and connected, easing assembly difficulty, improving installation efficiency, providing a cushioning effect, preventing damage to corner areas when the first snaps 31 and the first sprags 42 are connected, and facilitating mold release during manufacturing. In another embodiment, the first snap-fit ​​assembly includes a first sprag 42 provided on the rear surface of the display 3 and a first snap 31 provided on the front end of the connecting base and engaging and connecting with the first sprag 42.

[0044] As shown in Figures 3-5, a second snap fit assembly is provided in the connection area between the first inner case 111 and the second inner case 112, and the second snap fit assembly includes a second sprag 113 provided at the rear end of the first inner case 111 and a second snap 114 provided at the front end of the second inner case 112 and engaging with the second sprag 113; alternatively, the installation positions of the second sprag 113 and the second snap 114 are interchangeable; for example, in some embodiments, the second snap 114 is provided at the rear end of the first inner case 111 and the second sprag 113 is provided at the front end of the second inner case 112.

[0045] As shown in FIGS. 3-2 and 3-3 , the blower assembly 2 includes a drive motor 21 arranged along the central axis of the housing chamber, a fan rotor 22 mounted on a rotary shaft 211 of the drive motor 21, and blades 23 mounted on the outer wall of the fan rotor 22. The fan rotor 22 has a hollow truncated cone shape as a whole, with one end of the fan rotor 22 with a larger inner diameter facing the exhaust port. The blades 23 have a spiral streamlined shape, reducing the resistance of the airflow from the intake port to the exhaust port and further ensuring the exhaust effect of the portable fan. The fan rotor 22 at least partially extends to the drive motor 21, and a rotary bearing 24 connected to the inner wall of the fan rotor 22 is fitted in a region of the drive motor 21 corresponding to the fan rotor 22. Preferably, the fan rotor 22 and the rotary shaft 211 of the drive motor 21 are connected by an adapter. The fan rotor 22 and the blades 23 are integrally molded. By providing the structure of the driving motor 21 and the fan rotor 22, the space occupied by the blower unit 100 is reduced, and by providing the rotary bearing 24, the rotational stability of the fan rotor 22 is ensured, further ensuring the operational stability of the entire portable fan.

[0046] A cover 115 is provided in a region of the second inner case 112 corresponding to the blades 23, covering the outside of the blades 23. The rear end of the cover 115 is connected to the air intake port, and the inner diameter of the cover 115 gradually decreases from front to rear. A rear cover 5 is provided at the air intake port, and the rear cover 5 is provided with an opening structure 51 for allowing airflow to enter the accommodation chamber. Since the cover 115 is connected to the air intake port, the airflow enters through the air intake port, is guided by the cover 115, and flows directly toward the blades 23 and the fan rotor 22. The fan rotor 22 rotates the blades 23 in conjunction with each other, forming a spiral air passage. The air passage formed by the cooperation of the cover 115, the blades 23, and the fan rotor 22 improves the air guidance effect and the exhaust effect. Preferably, in this embodiment, the rear cover 5 has connecting ribs scattered from the edge region in the central axis direction, and the gaps between the connecting ribs form the opening structure 51. More preferably, the connecting ribs have an arc shape that convex backward, reducing resistance to airflow and ensuring a good ventilation effect. In another embodiment, the opening structure 51 is formed by opening a number of circular, square, or other shaped hole structures in the rear cover 5.

[0047] 3-2, 3-3, and 3-5, the rear cover 5 and the second inner case 112 are connected by a fixing ring 116, the rear cover 5 is attached to the rear end of the fixing ring 116, the front end of the fixing ring 116 is connected to a third snap fit assembly at the rear end of the second inner case 112, and the third snap fit assembly is connected to a third snap 117 provided at the front end of the fixing ring 116 and a third snap 118 provided at the rear end of the second inner case 112. , and a third sprag 118 that engages with the third snap 117. As shown in FIG. 3-3, the outer wall of the third snap 117 is provided with a cut surface, which facilitates engagement between the third snap 117 and the third sprag 118 and improves installation efficiency. In another embodiment, the third snap-fit ​​assembly includes a third sprag 118 provided at the front end of the fixing ring 116, and a third snap 117 provided at the rear end of the second inner case 112 that engages with the third sprag 118.

[0048] The portable fan further includes a power supply electrically connected to the display 3 and the driving motor 21 .

[0049] Example 3-2 refers to those shown in Figures 3-6 and 3-7.

[0050] This embodiment discloses a portable fan including the blower unit 100 described in the first embodiment. As shown in FIGS. 3-6 and 3-7 , the portable fan further includes a handheld unit 200 connected to the blower unit 100. The handheld unit 200 includes a handle 6 and a wind speed adjustment knob 7, a charging port 8, and a switch button 9 provided on the handle 6. The power supply is housed in the handle 6, and a mounting groove for mounting the power supply is provided in the handle 6. The wind speed adjustment knob 7, the charging port 8, and the switch button 9 are each 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 of the drive motor 21, the display 3, and the wind speed adjustment knob 7 to the power supply. The air speed adjustment knob 7 is electrically connected to the drive motor 21 and is used to control the output power of the drive motor 21. In use, rotating the air speed adjustment knob 7 adjusts the output power of the drive motor 21. The drive motor 21 drives the fan rotor 22 to rotate the blades 23 at different speeds, thereby driving the airflow from the air inlet to the air outlet at different flow rates, thereby achieving the effect of controlling the air speed. This satisfies the user's personalized usage needs in different situations and improves the user's usage experience. Preferably, as shown in FIGS. 3-7 , in this embodiment, the air speed adjustment knob 7 is located on the side of the handle 6 facing the user for easy operation, and the charging port and the switch button are located on the side of the handle 6 facing away from the user. In some embodiments, a dustproof cover may be further provided on the charging port to prevent dust, water, etc. from entering the charging port.

[0051] As shown in FIGS. 3-7 , the top of the handle 6 extends into the case 1 of the blower unit 100. Specifically, the top of the handle 6 includes a first connecting member 61 extending into the case 1 corresponding to the exhaust port. A second connecting member 13 corresponding to the first connecting member 61 is provided at the exhaust port, and the first connecting member 61 and the second connecting member 13 are connected by a first fastening member 14. In another embodiment, to further improve the stability of the connection between the hand-held portion 200 and the blower unit 100, the handle 6 further includes a first connecting plate 62 extending into the case 1 corresponding to the intake port. A second connecting plate 15 corresponding to the first connecting plate 62 is provided at the intake port, and the first connecting plate 62 and the second connecting plate 15 are connected by a second fastening member 16. The first connecting plate 62 is provided opposite the first connecting member 61.

[0052] When in use, the switch button 9 is turned on, the display 3 lights up to indicate the operating state, and the air speed adjusting knob 7 is rotated to adjust the air speed.

[0053] In another embodiment, the portable fan may be composed of the blowing unit alone, or the blowing unit may be connected to another part that is easy to carry. For example, if the portable fan is a neck-hanging type, it can be understood that the portable fan includes a curved attachment part that is connected to the blowing unit.

[0054] Example 4 refers to those shown in Figures 4-1 to 4-6.

[0055] In another feasible embodiment, referring to Figures 4-1, 4-3 and 4-4, the handheld fan 101 comprises a fan body 1 and a handle 2 connected to the fan body 1, and a control circuit board and a control unit 21 connected to the control circuit board are provided inside the handle 2, and the control unit 21 is fitted into the handle 2 and partially exposed from the handle 2, and the control unit 21 comprises a roller button 211 and a spring connected to the roller button, and the airflow volume of the handheld fan 101 is adjusted by rolling the roller button 211, and the operating state of the handheld fan 101 is adjusted by pressing the roller button 211.

[0056] In one possible embodiment, referring to Figures 4-6, the control unit 21 further includes a rotating shaft 213 connected to the roller button 211 and a roller rotary encoder 214 connected to the rotating shaft 213, and an airflow adjustment circuit is provided on the control circuit board, and the airflow adjustment circuit is connected to the roller rotary encoder 214, thereby realizing stepless adjustment of the airflow volume of the portable fan 100.

[0057] In another possible embodiment, referring to Figures 4-1, 4-3, 4-4 and 4-6, 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, and an airflow adjustment circuit is provided on the control circuit board, and the airflow adjustment circuit is connected to the roller rotary encoder 214, thereby realizing stepless adjustment of the airflow volume of the handheld fan 101.

[0058] Roller rotary encoder 214 is attached to the control circuit board, and when roller button 211 is rolled, rotating shaft 213 rotates around the central axis, and roller rotary encoder 214 outputs a digital signal, which is processed by the control circuit board, thereby realizing stepless adjustment of the airflow volume for portable fan 100 and handheld fan 101.

[0059] In another possible embodiment, referring to FIGS. 4-2 and 4-4, the rotating shaft 213 is connected to a spring (not shown), a switch control circuit is further provided on the control circuit board, and the roller button 211 is connected to the switch control circuit via a spring. Preferably, the control circuit board is installed vertically, and a spring is installed at the contact on the control circuit board to reset the roller button 211. When the roller button 211 is pressed, the switch control circuit is turned on by pressure, and the handheld fan 101 is operated. At this time, by rolling the roller button 211, the airflow volume of the handheld fan 101 can be continuously adjusted. When the roller button 211 is rolled, the switch control circuit is turned off, and the handheld fan 101 stops operating. This method improves the safety of the handheld fan 101, reduces energy consumption, and reduces losses caused by accidental operation or touching.

[0060] In another possible embodiment, referring to FIG. 4-4 , the bearing 212 includes a main body 2121 and annular portions 2122 located on opposite sides of the main body 2121, with a receiving cavity formed in the middle of the annular portions 2122 for receiving the roller button 211. Preferably, the roller button 211 is a tire-like member including two parallel circular end faces, one at the front and the other at the rear, and an annular circumferential surface connecting the peripheries of the circular end faces, with a plurality of arc-shaped grooves evenly distributed around the annular circumferential surface. The arc-shaped grooves make it easier for the user to roll the roller button 211, improving the user experience. Preferably, the diameter of the annular portions is slightly larger than the diameter of the roller button 211, which can provide good protection for the roller button 211 and extend the service life of the roller button 211.

[0061] In one possible embodiment, a battery compartment 22 is provided inside the fan body 20, a storage battery 221 is provided inside the battery compartment 22, and the control circuit board is connected to the storage battery 221. In another possible embodiment, referring to Figs. 4-1 and 4-3, the battery compartment 22 is provided inside the handle 2. Preferably, the storage battery is a rechargeable battery, which further improves the convenience and portability of the portable fan 100 or handheld fan 101.

[0062] In one possible embodiment, referring to Figures 4-5 and 4-6, the roller rotary 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 storage battery 221.

[0063] 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, and the second adjustment module 202 includes a second capacitor C2, a third resistor R3 and a fourth resistor R4. The first output terminal 2141 of the roller rotary 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 electrode of the storage battery 221, and the other end of the first capacitor C1 is grounded. The second output terminal 2142 of the roller rotary 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 electrode of the storage battery 221. The other end of the fourth resistor R4 is connected to one end of the second capacitor C2, the other end of which is grounded. The third output terminal 2143 of the roller rotary encoder 214 is grounded. The roller rotary encoder 214 enables the roller button 211 to generate a plurality of different digital signals, and further, the rotation speed of the portable fan 100 or the handheld fan 101 can be continuously controlled based on the plurality of different digital signals, improving the user experience.

[0064] In one possible embodiment, the portable fan 100 further includes a switch button 216 provided on the fan body 20. The switch button 216 is exposed from the fan body 20 and is used to adjust the operating state of the portable fan 100. Pressing the switch button 216 activates the portable fan 100, and rolling the roller button 211 at this time allows the fan volume of the portable fan 100 to be adjusted steplessly. Pressing the switch button 216 again stops the portable fan 100 from operating.

[0065] In one possible embodiment, the control circuit board further includes an operating state adjustment circuit, and the switch button 216 is connected to the switch control circuit. Pressing the switch button 216 adjusts the operating state of the portable fan 100. When the switch button 216 is pressed, the operating state adjustment circuit is turned on, and the portable fan 100 operates. At this time, by rolling the roller button 211, the airflow volume of the portable fan 100 can be continuously adjusted. After the airflow volume of the portable fan 100 can be continuously adjusted by rolling the roller button 211, pressing the switch button 216 again turns off the operating state adjustment circuit, and the portable fan 100 stops operating. This method improves the safety of the portable fan 100 and reduces energy consumption.

[0066] In another possible embodiment, referring to FIGS. 4-1, 4-2, and 4-4, the handheld fan 101 further includes an anti-touch button 215 on the handle 2. The anti-touch button 215 is exposed from the handle 2 and is used to prevent the handheld fan 101 from being turned on by an accidental touch. Preferably, the anti-touch button 215 is a button switch or a toggle switch. In another possible embodiment, the anti-touch button is moved to press the roller button 211, which activates the handheld fan 101. At this time, the airflow volume of the handheld fan 101 can be continuously adjusted by rolling the roller button 211. The dual activation method of toggling the anti-touch button 215 and pressing the roller button 211 prevents the handheld fan 101 from being turned on after the roller button 211 is pressed by another object, further improving the safety of the handheld fan 101 and making it energy-saving and environmentally friendly.

[0067] In another possible embodiment, referring to Figures 4-1, 4-2 and 4-4, the accidental touch prevention button 215 is located at the bottom of the fan body 1, and the accidental touch prevention button 215 and the roller button 211 are located on opposite sides of the handle 2. Preferably, the roller button 211 and the accidental touch prevention button 215 are located at the bottom of the handle 2 and at a position towards the top of the middle of the handle 2, which is more in line with the usage habits of the human body and improves the user experience. The accidental touch prevention button 215 and the roller button 211 are located on opposite sides of the handle 2, which can prevent the accidental touch prevention button 215 from being accidentally moved by an object on the same side after the roller button 211 is pressed by another object, thereby preventing the handheld fan 101 from being accidentally started.

[0068] In one possible embodiment, a second opening 24 is provided on the surface of the fan body 20 to expose the roller button 211. In another possible embodiment, referring to Figs. 4-1 and 4-4, a second opening 24 is provided on the surface of the handle 2 to expose the roller button 211, and a mounting plate 241 is fitted into the second opening 24, so that the roller button 211 is exposed to the outside of the second opening 24 through the mounting plate 241. Preferably, the shape of the mounting plate 241 fits into the roller button 21.

[0069] In one possible embodiment, a first opening 23 is provided on the surface of the fan body 20 to expose the switch button 216. In another possible embodiment, referring to FIGS. 4-1 and 4-4, a first opening 23 is provided on the surface of the handle 2 to expose the anti-touch button 215. Preferably, the shape of the first opening 23 is such that it fits into the anti-touch button 215, and the anti-touch button 215 is exposed to the outside of the handle 2 through the first opening 23. Preferably, a rope loop hole 25 is further provided on the bottom of the handle 2, and the rope loop hole 25 is used to attach a rope or a rope-hanging decorative member, making it easier to take the handheld fan 101 in and out and improving the appearance of the handheld fan 101. Preferably, the rope loop hole 25 is located on the same side as the first opening 23.

[0070] The beneficial effect of the present invention is that a control circuit board is installed inside the fan body of the portable fan, the control circuit board is connected to a control unit, the control unit is fitted into the fan body, the control unit includes a roller button, and the roller button is used to continuously adjust the airflow volume of the portable fan. In this way, the portable fan of the present invention can continuously adjust the airflow volume of the portable fan and freely adjust the wind speed.

[0071] Example 5 refers to those shown in Figures 5-1 to 5-6.

[0072] Referring to Figures 5-1, 5-3 and 5-4, the handheld fan 100 comprises a fan body 1 and a handle 2 connected to the fan body 1. Inside the handle 2 are provided a control circuit board and a control unit 21 connected to the control circuit board. The control unit 21 is fitted into the handle 2 and is partially exposed from the handle 2. The control unit 21 comprises a roller button 211 and a spring connected to the roller button. The airflow volume of the handheld fan 100 is adjusted by rolling the roller button 211, and the operating state of the handheld fan 100 is adjusted by pressing the roller button 211.

[0073] 5-1, 5-3 and 5-4, in one possible embodiment, control unit 21 further includes bearing 212, rotating shaft 213 connected to the inner ring of bearing 212, and roller rotary encoder 214 connected to rotating shaft 213, the outer ring of bearing 212 is connected to roller button 211, and an airflow adjustment circuit is provided on the control circuit board, which is connected to roller rotary encoder 214 to achieve stepless adjustment of the airflow volume of handheld fan 100. Roller rotary encoder 214 is mounted on the control circuit board, and when roller button 211 is rolled, it rotates rotating shaft 213 around its central axis, outputting a digital signal via roller rotary encoder 214, which is processed by the control circuit board to achieve stepless adjustment of the airflow volume of handheld fan 100.

[0074] 5-2 and 5-4, in one possible embodiment, the rotating shaft 213 is connected to a spring (not shown), a switch control circuit is further provided on the control circuit board, and the roller button 211 is connected to the switch control circuit via a spring. Preferably, the control circuit board is installed vertically, and a spring is provided at a contact on the control circuit board to reset the roller button 211. In another possible embodiment, pressing the roller button 211 turns on the switch control circuit, causing the handheld fan 100 to operate. At this time, rolling the roller button 211 allows the fan speed of the handheld fan 100 to be continuously adjusted. While the fan speed of the handheld fan 100 can be continuously adjusted by rolling the roller button 211, pressing the roller button 211 turns off the switch control circuit, causing the handheld fan 100 to stop operating. This method improves the safety of the handheld fan 100, reduces energy consumption, and reduces losses due to accidental touching.

[0075] In one possible embodiment, referring to FIG. 5-4 , the bearing 212 includes a main body 2121 and annular portions 2122 located on opposite sides of the main body 2121, with a receiving cavity formed in the middle of the annular portions 2122 for receiving the roller button 211. Preferably, the roller button 211 is a tire-like member including two parallel circular end faces, front and rear, and an annular circumferential surface connecting the peripheries of the circular end faces, with a plurality of arc-shaped grooves evenly distributed around the annular circumferential surface. The arc-shaped grooves make it easier for the user to roll the roller button 211, improving the user experience. Preferably, the diameter of the annular portions is slightly larger than the diameter of the roller button 211, which can provide good protection for the roller button 211 and extend the service life of the roller button 211.

[0076] 5-1 and 5-3, in one possible embodiment, a battery compartment 22 is provided inside the handle 2, a storage battery 221 is housed inside the battery compartment 22, and the control circuit board is connected to the storage battery 221. Preferably, the storage battery 221 is a rechargeable battery, which further improves the convenience and portability of the handheld fan 100.

[0077] In one possible embodiment, referring to Figures 5-1, 5-4 and 5-5, the roller rotary 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 storage battery 221.

[0078] 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, and the second adjustment module 202 includes a second capacitor C2, a third resistor R3 and a fourth resistor R4. The first output terminal 2141 of the roller rotary 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 electrode of the storage battery 221, and the other end of the first capacitor C1 is grounded. The second output terminal 2142 of the roller rotary 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 electrode of the storage battery 221. The other end of the fourth resistor R4 is connected to one end of the second capacitor C2, the other end of which is grounded. The third output terminal 2143 of the roller rotary encoder 214 is grounded. The roller rotary encoder 214 enables the roller button 211 to generate a number of different digital signals, which can then be used to continuously control the rotation speed of the handheld fan 100, improving the user experience.

[0079] 5-1, 5-2 and 5-4, in one possible embodiment, the handheld fan 100 further includes an anti-accidental touch button 215 on the handle 2. The anti-accidental touch button 215 is exposed from the handle 2 and prevents the handheld fan 100 from being turned on by accident. Preferably, the anti-accidental touch button 215 is a button switch or a toggle switch. In another possible embodiment, the handheld fan 100 is turned on after toggling the anti-accidental touch button and pressing the roller button 211. At this time, the airflow volume of the handheld fan 100 can be continuously adjusted by simply rolling the roller button 211. The dual activation method of toggling the anti-touch button 215 and pressing the roller button 211 prevents the handheld fan 100 from being turned on after the roller button 211 is pressed by another object, further improving the safety of the handheld fan 100 and making it energy-saving and environmentally friendly.

[0080] 5-1, 5-2 and 5-4, in one possible embodiment, the accidental touch prevention button 215 is located at the bottom of the fan body 1, and the accidental touch prevention button 215 and the roller button 211 are located on opposite sides of the handle 2. Preferably, the roller button 211 and the accidental touch prevention button 215 are located at the bottom of the handle 2 and at a position toward the top of the center of the handle 2, which is more in line with the usage habits of the human body and improves the user experience. The accidental touch prevention button 215 and the roller button 211 are located on opposite sides of the handle 2, which can prevent the accidental touch prevention button 215 from being accidentally moved by an object on the same side after the roller button 211 is pressed by another object, thereby preventing the handheld fan 100 from being accidentally started.

[0081] 5-1 and 5-4, in one possible embodiment, a second opening 24 is provided on the surface of the handle 2 to expose the roller button 211, and a mounting plate 241 is fitted into the second opening 24, so that the roller button 211 is exposed to the outside of the second opening 24 through the mounting plate 241. Preferably, the shape of the mounting plate 241 fits into the roller button 211.

[0082] 5-1 and 5-2, in one possible embodiment, a first opening 23 is provided on the surface of the handle 2 to expose the accidental touch prevention button 215. Preferably, the shape of the first opening 23 is adapted to fit the accidental touch prevention button 215, and the accidental touch prevention button 215 is exposed to the outside of the handle 2 through the first opening 23. Preferably, a rope loop hole 25 is further provided at the bottom of the handle 2, which is used to attach a rope or a rope-hanging decorative member, making it easier to take the handheld fan 100 in and out and improving the appearance of the handheld fan 100. Preferably, the rope loop hole 25 is located on the same side as the first opening 23.

[0083] The technical features of the above embodiments can be combined in any way, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but as long as there is no contradiction in the combination of these technical features, they should be considered within the scope described in this specification.

[0084] The beneficial effect of this embodiment is that a control circuit board is installed inside the handle of the handheld fan, the control circuit board is connected to a controller, the controller is fitted into the handle, the controller includes a roller button and a spring connected to the roller button, the roller button can be rolled to adjust the airflow volume of the handheld fan, and the roller button can be pressed to adjust the operating state of the handheld fan. In this way, the handheld fan of the present invention can be turned on and off by pressing the roller button, and the wind speed of the handheld fan can be adjusted continuously by rolling the roller button, allowing the airflow volume of the handheld fan to be adjusted as desired.

[0085] Example 6-1 refers to those shown in FIGS. 6-1 to 6-10.

[0086] 6-1 to 6-10, FIG. 6-1 is a structural schematic diagram of a hand-held structure used in a hand-held fan according to an embodiment of the present invention, FIG. 6-2 is a structural schematic diagram of a mounting frame 2 and a circuit board assembly in the hand-held structure used in a hand-held fan according to an embodiment of the present invention, FIG. 6-3 is a structural schematic diagram of a shift knob assembly 51 and a battery 4 in the hand-held structure used in a hand-held fan according to an embodiment of the present invention, FIG. 6-4 is a structural schematic diagram of a protection switch button assembly 52 in the hand-held structure used in a hand-held fan according to an embodiment of the present invention, and FIG. 6-5 is a structural schematic diagram of a protection switch button assembly 52 in the hand-held structure used in a hand-held fan according to an embodiment of the present invention. Fig. 6-6 is a structural diagram of the handle portion 1 and the air blowing structure 6 of the hand-held structure used in the hand-held fan according to the embodiment of the present invention, Fig. 6-7 is a structural diagram of the first support plate 24 and the second support plate 25 of the hand-held structure used in the hand-held fan according to the embodiment of the present invention, Fig. 6-8 is a structural diagram of the storage space 27 of the hand-held structure used in the hand-held fan according to the embodiment of the present invention, Fig. 6-9 is a structural diagram of the separator plate 26 of the hand-held structure used in the hand-held fan according to the embodiment of the present invention, Fig. 6-10 is a structural diagram of the first protrusion 22 and the second protrusion 23 of the hand-held structure used in the hand-held fan according to the embodiment of the present invention. The handle structure used in the handheld fan of Example 1 of the present invention includes a handle portion 1 having a hollow cavity 11, a mounting frame 2, a circuit board assembly, a battery 4, and a control mechanism, and the handle portion 1 having a hollow cavity 11, the mounting frame 2, the circuit board assembly, the battery 4, and the control mechanism will be described in detail below.

[0087] The handle 1 having the hollow cavity 11 and the mounting frame 2 will now be described.

[0088] The handle 1 is provided with a first through groove 12 facing the shift knob unit 51, and the handle 1 is further provided with a second through groove 13 facing the protection switch button assembly 52. ​​Clamp plates 14 located on both sides of the battery 4 and sealing lids 15 removably connected to the clamp plates 14 are provided inside the hollow cavity 11. The clamp plates 14 are connected to the mounting frame 2, and the mounting frame 2 is provided in the hollow cavity 11. Positioning posts 141 are provided on the clamp plates 14, and positioning holes 21 corresponding to the positioning posts 141 are provided in the mounting frame 2, and the positioning posts 141 are inserted into the positioning holes 21. The sealing lids 15 and the handle 1 surround 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 an accommodating space 27, and a first protrusion 22 and a second protrusion 23 provided on both sides of the frame body 28, respectively, the first protrusion 22 abutting against the first circuit board 31, the first circuit board 31 being located between the first protrusion 22 and the battery 4, the second protrusion 23 abutting against the second circuit board 32, and the second circuit board 31 being located between the first protrusion 22 and the battery 4. 2 is located between the second protrusion 23 and the battery 4, the first support plate 24 is engaged with the first circuit board 31, the protection switch button assembly 52 is provided on the first support plate 24, the second support plate 25 is engaged with the second circuit board 32, the first circuit board 31 is connected to the second circuit board 32 by a conductor passing through the accommodating space 27, and the shift knob assembly 51 is provided on the second support plate 25. The frame body 28 may further be provided with a separator 26, which is located between the first circuit board 31 and the second circuit board 32 and is located in the accommodating space 27, and the conductor connected to the first circuit board 31 is connected to the second circuit board 32 by passing through the separator 26.

[0089] Specifically, the handle 1 may include a handle case located on the outside and a hollow cavity 11 located inside the handle case, with the hollow cavity 11 having a space inside to accommodate the mounting frame 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 formed on both sides of the handle 1, respectively. The first through-slot 12 has a space for accommodating a shift knob assembly 51, and the second through-slot 13 has a space for accommodating a protection switch button assembly 52. ​​Two clamping plates 14 are located inside the hollow cavity 11 and slidably attached to the inner walls of the handle case. Positioning posts 141 are fixed to one ends of the clamping plates 14 and inserted into positioning holes 21 located at the bottom of the mounting frame 2 to support and fix the mounting frame 2. A locking groove may be provided on the other end of the clamping plate 14, and a locking member that fits into the locking groove may be provided on the sealing lid 15, so that the locking member and the locking groove are locked together, making it easy to attach the sealing lid 15 to the clamping plate 14 and at the same time easy to remove the sealing lid 15 from the clamping plate 14. A battery 4 may be placed between two clamping plates 14, with the sealing lid 15 located at the bottom of the battery 4 and the mounting frame 2 located at the top of the battery 4, and the circumference of the battery 4 may be limited by the clamping plates 14, the sealing lid 15, and the mounting frame 2, which is advantageous for making the overall structure more compact.

[0090] In addition, a first protrusion 22 and a second protrusion 23 may be provided on each of the tops located on both sides of the frame body 28, and the first protrusion 22 restricts the first circuit board 31 downward. The first circuit board 31 may be provided between the first protrusion 22 and the battery 4, and the position of the first circuit board 31 in the vertical direction can be restricted by the first protrusion 22 and the battery 4. The first support plate 24 and the first circuit board 31 are locked to each other. For example, a locking joint 241 is provided on the first support plate 24 and a locking groove 311 matching the locking joint 241 is provided on the first circuit board 31, and the locking joint 241 provided on the first support plate 24 can be engaged with the locking groove 311 provided on the first circuit board 31, or the locking groove 311 is provided on the first support plate 24 and the locking groove 311 is provided on the first circuit board 31. 11, and the locking joint 241 provided on the first circuit board 31 can engage with the locking groove 311 provided on the first support plate 24, facilitating installation and maintenance of the first circuit board 31, and allowing the frame body 28 and the first support plate 24 to horizontally restrain the position of the first circuit board 31, preventing displacement of the first circuit board 31 during use. The structure and principle by which the second support plate 25 and the second circuit board 32 are locked together are the same as the structure and principle by which the first support plate 24 and the first circuit board 31 are locked together, and therefore will not be described here. In addition, the separator 26 provided on the frame main body 28 can separate the conductors connected to each other between the first circuit board 31 and the second circuit board 32. For example, for a conductor connecting the first circuit board 31 and the second circuit board 32, after one end of the conductor is connected to the second circuit board 32, the other end of the conductor can be located in the space between the separator 26 and the first circuit board 31. By separating the conductor from the shift knob assembly 51 described below by the separator 26, the layout of the conductors can be optimized in the limited space and interference of the conductors with the shift knob assembly 51 can be avoided.

[0091] The circuit board assembly, battery 4 and control mechanism are described.

[0092] A circuit board assembly is provided on the mounting frame 2, and the circuit board assembly includes a first circuit board 31 and a second circuit board 32. The first circuit board 31 is provided on the mounting frame 2, and the first circuit board 31 is connected to the protection switch button assembly 52 and the battery 4, respectively. The second circuit board 32 is provided on the mounting frame 2, and the second circuit board 32 is connected to the shift knob assembly 51 and the first circuit board 31, respectively, and the second circuit board 32 and the first circuit board 31 are disposed opposite each other. The battery 4 is provided inside the hollow cavity 11. The control mechanism includes a shift knob assembly 51, a protection switch button assembly 52, and a charging port 53, which are provided on the mounting frame 2, and the shift knob assembly 51 is connected to the battery 4 via the circuit board assembly. The shift knob assembly 51 includes a support block 511 mounted on the mounting frame 2, a knob 512, and a rotating shaft 513 rotatably mounted on the support block 511. The support block 511 has an opening 5111, the rotating shaft 513 passes through the knob 512, the knob 512 is positioned in the opening 5111, and the knob 512 faces the first through-groove 12. The protection switch button assembly 52 is mounted on the mounting frame 2 and connected to the circuit board assembly, and the protection switch button assembly 52 and the shift knob assembly 51 are disposed opposite each other. The charging port 53 is mounted on the mounting frame 2, the charging port 53 is connected to the first circuit board 31, and faces the second through-groove 13.

[0093] 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 of the control mechanism, respectively. The protection switch button assembly 52 can control the connection or disconnection of a circuit that supplies power via the battery 4. For example, the protection switch button assembly 52 employs a slide switch. When the button of the protection switch button assembly 52 is slid to one end, the circuit is connected and the fan is activated. When the button of the protection switch button assembly 52 is slid to the other end, the circuit is interrupted and the fan is not activated, preventing the operator from accidentally turning on the fan after accidentally touching the shift knob unit 51. Power can be supplied from the battery 4 via the first circuit board 31, and the second circuit board 32 is connected to the shift knob assembly 51 and the first circuit board 31, respectively. The support block 511 of the shift knob assembly 51 is attached to the second support plate 25, and the rotating shaft 513 is connected to the knob 512. Then, the rotating shaft 513 is rotated by rotating the knob 512. One end of the rotating shaft 513 is rotatably attached to the support block 511. For example, a through hole is provided at the connection point between the support block 511 and the second circuit board 32, and one end of the rotating shaft 513 is rotatably attached thereto. When the knob 512 of the shift knob assembly 51 is rotated, the rotation speed of the fan connected to the first circuit board 31 and the second circuit board 32 can be adjusted, thereby controlling the magnitude of the wind speed. The other end of the rotating shaft 513 can contact an elastic button provided on the second circuit board 32, and when the knob 512 located in the opening region 5111 is pushed out so as to move it in a direction approaching the first circuit board 31, the knob 512 moves the other end of the rotating shaft 513 to press the elastic button, and the pressed elastic button can be used to check the charge level of the battery 4 after being connected to the second circuit board 32, that is, pressing the knob 512 of the shift knob assembly 51 can check the charge level of the battery 4. The charging port 53 may be a USB interface, and is used to charge the battery 4 after being connected to an external power source.

[0094] The present invention provides a handheld structure for a handheld fan, comprising a mounting frame 2 and a battery 4 mounted in a hollow cavity 11 of a handheld fan 1, a circuit board assembly mounted on the mounting frame 2, a shift knob assembly 51 of a control mechanism mounted on the mounting frame 2, the shift knob assembly 51 connected to the battery 4 via the circuit board assembly, and a first through-hole 12 in the handheld fan 1 facing the shift knob assembly 51. The circuit board assembly, shift knob assembly 51, mounting frame 2, and battery 4 are all located within the hollow cavity 11 of the handheld fan 1, and the shift knob assembly 51 controls the rotation speed of the fan by adjusting the circuit board assembly connected to the battery 4. This is advantageous in reducing the space occupied by the entire handheld fan structure, making the handheld fan 1 easy to grip, thereby reducing the volume and space occupied by the entire handheld fan structure and making it convenient to carry. This achieves the technical effects of a small volume, small space occupied, and ease of carrying.

[0095] In order to provide a detailed description of the handheld fan of the present invention, the above Example 1 provides a detailed description of the handle structure used in the handheld fan. Based on the same utility model concept, the present application further provides a handheld fan, and details are given in Example 2.

[0096] Example 6-2

[0097] This embodiment provides a handheld fan, which includes a handheld structure used in the handheld fan and a blowing structure 6 connected to the handheld structure, and the blowing structure 6 can be connected to the handheld part 1.

[0098] The present invention provides a handheld fan, in which a mounting frame 2 and a battery 4 are mounted in a hollow cavity 11 of a handheld fan 1, a circuit board assembly is mounted in the mounting frame 2, a shift knob assembly 51 of a control mechanism is mounted on the mounting frame 2, the shift knob assembly 51 is connected to the battery 4 via the circuit board assembly, a first through-hole 12 in the handheld fan 1 faces the shift knob assembly 51, and the handheld fan 1 is connected to a blowing structure 6. In this way, the circuit board assembly, shift knob assembly 51, mounting frame 2, and battery 4 are all located within the hollow cavity 11 of the handheld fan 1, and the shift knob assembly 51 controls the rotation speed of the fan by adjusting the circuit board assembly connected to the battery 4, which is advantageous in reducing the space occupied by the entire handheld fan structure and making the handheld fan 1 easier to grip. This achieves the technical effects of small volume, small space occupied, and ease of carrying.

[0099] Example 7 refers to those shown in Figures 7-1 to 7-8.

[0100] The present invention discloses a handheld fan in which an air passage 111 is formed in an inner case 11 of a blower unit 1, an air intake port and an air exhaust port communicate with both sides of the air passage 111, a fan assembly 13 is provided in the air passage 111, and an outer case 12 is enclosed outside the inner case 11. In the handheld unit 2, the handheld case 21 is enclosed outside the mounting mechanism, and the handheld case 21 is inserted into an attachment opening 121 of the outer case 12, and a fixing member 23 passes through the outer case 12 of the blower unit 1 and the handheld case 21 in order to be connected to the mounting mechanism. In this way, the handheld case 2 and the mounting mechanism are connected to the outer case 12 of the blower unit 1 via the fixing member 23, and the air passage 111 formed in the inner case 11 of the blower unit 1 allows gas to flow, which is advantageous for improving the compactness of the structure and improving stability and reliability during operation. This achieves the technical effects of improving compactness and reliability.

[0101] 7-1 to 7-8, Fig. 7-1 is a structural diagram of a handheld fan according to an embodiment of the present invention, Fig. 7-2 is a structural diagram of mounting frame 221 in the handheld fan according to an embodiment of the present invention, Fig. 7-3 is a structural diagram of handheld case 21 in the handheld fan according to an embodiment of the present invention, Fig. 7-4 is a structural diagram of the control mechanism in the handheld fan according to an embodiment of the present invention, Fig. 7-5 is a structural diagram of mounting groove 114 in the handheld fan according to an embodiment of the present invention, Fig. 7-6 is a structural diagram of case 12 in the handheld fan according to an embodiment of the present invention, Fig. 7-7 is a structural diagram of first circuit board 4 in the handheld fan according to an embodiment of the present invention, and Fig. 7-8 is a structural diagram of inner case 11 in the handheld fan according to an embodiment of the present invention. The handheld fan according to embodiment 1 of the present invention includes blower section 1 and handheld section 2, and blower section 1 and handheld section 2 will be described in detail below.

[0102] The blower unit 1 and the handheld unit 2 will now be described.

[0103] The blower 1 includes an inner case 11, an outer case 12, and a fan assembly 13. The inner case 11 is formed with an air passage 111, an intake port communicating with one side of the air passage 111, and an exhaust port communicating with the other side of the air passage 111. The fan assembly 13 is installed in the air passage 111. The outer case 12 is used to cover the outside of the inner case 11 and has an attachment opening 121. The inner case 11 is provided with a stopper plate 112 and a guard 113. An attachment groove 114 is formed between the stopper plate 112 and the guard 113, and one end of the handheld case 21 is inserted into the attachment groove 114. The handle 2 includes a handle case 21, an attachment mechanism, and a fixing member 23. The handle case 21 is fitted over the outside of the attachment mechanism, and is inserted into the attachment opening 121. The fixing member 23 passes through the outer case 12 and the handle case 21, and is then connected to the attachment mechanism. The attachment mechanism includes a mounting frame 221, a clamp plate 222, and a sealing lid 223. The mounting frame 221 is connected to the fixing member 23, the clamp plate 222 is connected to the mounting frame 221, and the sealing lid 223 is detachably connected to the clamp plate 222. A space in which a battery is placed is formed by being surrounded by the sealing lid 223, the clamp plate 222, and the mounting frame 221. The inner case 11 is provided with a first connecting member 115, the attachment mechanism is provided with a second connecting member 2211, and the fixing member 23 passes through the first connecting member 115 and the second connecting member 2211.

[0104] Specifically, air passage 111 formed inside inner case 11 is used for the circulation of gas; after gas enters air passage 111 from an intake port, the gas that has entered air passage 111 is discharged from an exhaust port. Outer case 12 is provided to cover the outside of inner case 11, and mounting opening 121 provided in outer case 12 has a space for accommodating one end of hand-held case 21 in handle portion 2 and a mounting frame 221 in the mounting mechanism. Stopper plate 112 and guard 113 are provided in inner case 11 at positions directly opposite mounting opening 121, and mounting groove 114 is formed between stopper plate 112 and guard 113. One end of hand-held case 21 can be fitted into mounting groove 114, and mounting groove 114 can restrict the position of one end of hand-held case 21.

[0105] One end of hand-held case 21 in handle part 2 may be inserted into mounting slot 114 after being inserted into mounting opening 121, and first connecting member 115 may be provided on mounting frame 221 of the mounting mechanism, and second connecting member 2211 may be provided on inner case 11 at a position corresponding to mounting frame 221. Fixing member 23 passes through second connecting members 2211 provided on outer case 12, hand-held case 21, and inner case 11, and is then connected to first connecting member 115 provided on mounting frame 221, and fixing member 23 may include a bolt. Two clamp plates 222 may be provided on each side of hand-held case 21, and the clamp plates 222 may be connected to mounting frames 221, and the sealing lid 223 may be removably connected to the clamp plates 222; for example, a locking joint may be provided on sealing lid 223, and a locking groove may be provided on clamp plate 222, thereby realizing the removably connection between sealing lid 223 and clamp plate 222. The battery may be placed in a space surrounded by the sealing lid 223 , the clamp plate 222 and the mounting frame 221 .

[0106] The handheld fan according to the embodiment of the present invention further includes a control mechanism, a first circuit board 4, a second circuit board 41, and a third circuit board 42. The control mechanism includes a shift knob assembly 31, a protection switch button assembly 32, and a charging port 33 mounted on the mounting mechanism. The handheld case 21 has a first through-groove 211 facing the shift knob assembly 31 and a second through-groove 212 facing the protection switch button assembly 32. The first circuit board 4 is mounted on the mounting mechanism and connected to the shift knob assembly 31. The protection switch button assembly 32 is mounted on the mounting frame 221, and the protection switch button assembly 32 and the shift knob assembly 31 are disposed opposite each other. The second circuit board 41 is mounted on the mounting frame 221 and connected to the protection switch button assembly 32 and the first circuit board 4, respectively. The charging port 33 is provided on the mounting frame 221, the charging port 33 is connected to the second circuit board 41, and the charging port 33 faces the second through groove 212. The third circuit board 42 is provided on the inner case 11, and the third circuit board 42 is connected to the second circuit board 41.

[0107] Specifically, the first circuit board 4 and the second circuit board 41 are arranged opposite each other on the mounting frame 221 of the mounting mechanism, the first circuit board 4 is connected to the shift knob assembly 31 of the control mechanism, the second circuit board 41 is connected to the protection switch button assembly 32, the charging port 33, the battery, and the first circuit board 4, respectively, and the third circuit board 42 is connected to the second circuit board 41, which may be connected to a motor in the fan assembly 13, which can drive the fan blades to rotate. The protection switch button assembly 32 can be controlled to connect or disconnect a circuit powered by the battery. For example, the protection switch button assembly 32 employs a slide switch, and when the button in the protection switch button assembly 32 is slid to one end, the circuit is connected, at which time the motor in the fan assembly 13 is activated to drive the fan blades to rotate. When the button on the protection switch button assembly 32 is slid to the other end, the circuit is interrupted, and the motor in the fan assembly 13 does not operate, causing the blades to not rotate, preventing the operator from accidentally turning on the fan after accidentally touching the shift knob assembly 31. The shift knob assembly 31 is used to adjust the rotation speed of the blades connected to the third circuit board 42 and control the wind speed. For example, rotating the knob on the shift knob assembly 31 adjusts the fan's speed, and pressing the knob on the shift knob assembly 31 allows the battery level to be checked. The charging port 33 may be a USB interface, which is used to charge the battery after being connected to an external power source.

[0108] The present invention provides a handheld fan in which an air passage 111 is formed in an inner case 11 of a blower unit 1, an air intake port and an air exhaust port communicate with both sides of the air passage 111, a fan assembly 13 is provided in the air passage 111, and an outer case 12 is enclosed outside the inner case 11. In the handheld unit 2, the handheld case 21 is enclosed outside the mounting mechanism, and the handheld case 21 is inserted into an attachment opening 121 of the outer case 12, and a fixing member 23 passes through the outer case 12 of the blower unit 1 and the handheld case 21 in that order before being connected to the mounting mechanism. In this way, the handheld case 2 and the mounting mechanism are connected to the outer case 12 of the blower unit 1 via the fixing member 23, and the air passage 111 formed in the inner case 11 of the blower unit 1 allows gas to flow, which is advantageous for improving the compactness of the structure and improving stability and reliability during operation. This achieves the technical effects of improving compactness and reliability.

[0109] Example 8-1 refers to those shown in FIGS. 8-1 to 8-11.

[0110] The present invention discloses a blower device for a hand-held fan in which an air passage 11 is formed by an inner case 1, both sides of which are connected to an intake port 23 and an exhaust port 24, at least a portion of a fan assembly 3 is provided in the air passage 11, an outer case 2 is fitted over the outside of the inner case 1, one side of a wiring opening 12 of the inner case 1 faces directly to the electrical connection part of the fan assembly 3 and the other side of the wiring opening 12 is used to face directly to the electrical connection part of a hand-held part 5 of the hand-held fan, and the electrical connection part of the fan assembly 3 is electrically connected to the electrical connection part of the hand-held part 5 by a conductor passing through the wiring opening 12. In this way, wiring opening 12 of inner case 1 allows the entrance and exit of the conductor connected to the electrical connection portion of fan assembly 3, and the conductor connected to the electrical connection portion of fan assembly 3 passes through wiring opening 12 from a position directly opposite the electrical connection portion of handle 5 of the hand-held fan, and then the conductor is connected to the electrical connection portion of handle 5 of the hand-held fan, which is advantageous in reducing the length of the conductor, improving durability, and improving the aesthetic appearance of the wiring. This achieves the technical effects of improving the stability, aesthetics, and durability of the wiring.

[0111] Referring to Figs. 8-1 to 8-11, Fig. 8-1 is a structural schematic diagram of a hand-held fan blower according to an embodiment of the present invention, Fig. 8-2 is a structural schematic diagram of a mounting frame 6 in the hand-held fan blower according to an embodiment of the present invention, Fig. 8-3 is a structural schematic diagram of a handle portion 5 in the hand-held fan blower according to an embodiment of the present invention, Fig. 8-4 is a structural schematic diagram of a wiring opening 12 in the hand-held fan blower according to an embodiment of the present invention, Fig. 8-5 is a structural schematic diagram of a wiring groove 21 in the hand-held fan blower according to an embodiment of the present invention, and Fig. 8-6 is a structural schematic diagram of a wiring opening 12 in the hand-held fan blower according to an embodiment of the present invention. 8-7 is a structural schematic diagram of a shift knob assembly 71 and a protective switch button assembly 72 in a hand-held fan blower according to an embodiment of the present invention; FIG. 8-8 is a structural schematic diagram of an inner case 1 and an outer case 2 in a hand-held fan blower according to an embodiment of the present invention; FIG. 8-9 is a structural schematic diagram of an air intake 23 and an air exhaust 24 in a hand-held fan blower according to an embodiment of the present invention; FIG. 8-10 is a partially enlarged structural schematic diagram of A in FIG. 8-9; and FIG. 8-11 is a structural schematic diagram of a fan assembly 3 in a hand-held fan blower according to an embodiment of the present invention. The hand-held fan blower according to embodiment 1 of the present invention includes an inner case 1, an outer case 2, and a fan assembly 3, and the inner case 1, the outer case 2, and the fan assembly 3 will be described in detail below.

[0112] The inner case 1, the fan assembly 3 and the outer case 2 will now be described.

[0113] Inner case 1 is formed with an air passage 11, an intake port 23 communicating with one side of air passage 11, and an exhaust port 24 communicating with the other side of air passage 11, and at least a portion of fan assembly 3 is provided in air passage 11. Inner case 1 has wiring opening 12, one side of which faces an electrical connection portion of fan assembly 3 and the other side of which faces an electrical connection portion of handle 5 of the handheld fan, and the electrical connection portion of fan assembly 3 is electrically connected to the electrical connection portion of handle 5 by a conductor passing through wiring opening 12. Handle 5 includes a handle portion 5 having an attachment opening 4, which is connected to outer case 2 and which faces the other side of wiring opening 12. The handheld fan blower device according to the first embodiment of the present invention further includes a mounting frame 6 mounted on the handle 5, a second circuit board 73, and a shift knob assembly 71. At least a portion of the mounting frame 6 is mounted in the mounting opening 4, the mounting frame 6 is connected to the inner case 1, and the mounting frame 6 has a storage space 61 for passing conductors. The electrical connection portion of the handheld fan 5 includes a first circuit board 7 mounted on the mounting frame 6 and inserted into the electrical connection portion of the fan assembly 3 by conductors. The second circuit board 73 is mounted on the mounting frame 6 and inserted into the first circuit board 7 by conductors. The shift knob assembly 71 is mounted on the mounting frame 6 and connected to the second circuit board 73. The second circuit board 73 is positioned opposite the first circuit board 7. The outer case 2 is disposed to cover the outside of the inner case 1. A guard 22 is provided on the inner case 1, and a wiring groove 21 is formed between the guard 22 and the inner case 1. At least a portion of the first circuit board 7 is disposed in the wiring groove 21.

[0114] Specifically, air passage 11 formed inside inner case 1 is used for the circulation of gas; gas enters air passage 11 through intake port 23 and is discharged from exhaust port 24. Outer case 2 is provided to cover the outside of inner case 1. Inner case 1 is provided with wiring opening 12 for passing through conductors, and both sides of wiring opening 12 directly face the electrical connection portion of fan assembly 3 and the electrical connection portion of handheld portion 5 of the handheld fan, respectively. The electrical connection portion of fan assembly 3 may be a circuit board connected to the fan motor, and the conductor connected to the circuit board passes through wiring opening 12 and is connected to first circuit board 7 of the electrical connection portion of handheld portion 5. The mounting opening 4 of the handle portion 5 faces the wiring opening 12, the receiving space 61 of the mounting bracket 6 and the mounting opening 4 of the handle portion 5 are connected to each other, the first circuit board 7 and the second circuit board 73 are arranged opposite each other on the mounting bracket 6, and the conductor passing through the wiring opening 12 can be inserted into the first circuit board 7 provided on the mounting bracket 6 after passing through the mounting opening 4 of the handle portion 5. For example, one end of the conductor passing through the wiring opening 12 can be inserted into the first circuit board 7 via an inserter, facilitating the interconnection or separation of the conductor and the first circuit board 7. The second circuit board 73 is inserted into the first circuit board 7 via a conductor. For example, the second circuit board 73 is connected to an inserter connected to the first circuit board 7 via a conductor, realizing the interconnection or separation of the second circuit board 73 and the first circuit board 7 and facilitating the interconnection or separation of the second circuit board 73 and the first circuit board 7. The shift knob assembly 71 connected to the second circuit board 73 can be used to adjust the rotation speed of the blades of the fan assembly 3 and control the magnitude of the wind speed; for example, by rotating the knob on the shift knob assembly 71, the fan's speed can be adjusted, and by pressing the knob on the shift knob assembly 71, the charge level of the battery 8 can be checked. A guard 22 is provided near the handle 5 of the inner case 1, and the diameter of the inner case 1 can gradually increase in the direction from the air intake 23 to the air exhaust 24, thus forming a recessed space at one end of the inner case 1 near the air intake 23.The guard 22 may be provided in the inwardly recessed space, and the inner case 1 and the guard 22 may surround it to form a wiring groove 21, with a portion of the first circuit board 7 inserted into the wiring groove 21 and a space inside the wiring groove 21 that can accommodate the conductors connected to the first circuit board 7, or the entire first circuit board 7 may be located outside the wiring groove 21, with a portion of the conductors connected to the first circuit board 7 located inside the wiring groove 21 and another portion of the conductors extending outside the wiring groove 21 before being connected to the first circuit board 7, thereby improving the utilization rate of the space.

[0115] The handheld fan blower device according to the first embodiment of the present invention may further include a protective switch button assembly 72 and a battery 8, the protective switch button assembly 72 being provided on the mounting frame 6 and electrically connected to the first circuit board 7. The battery 8 is provided in the handle 5 and is inserted into the first circuit board 7 via a conductor.

[0116] Specifically, the battery 8 may be attached to the handle 5 and may be inserted into the first circuit board 7 via a conductor, so that power can be supplied to the fan assembly 3 via the battery 8. A protection switch button assembly 72 electrically connected to the first circuit board 7 can control whether the circuit supplying power via the battery 8 is connected or disconnected. For example, the protection switch button assembly 72 may employ a slide switch. When the button of the protection switch button assembly 72 is slid to one end, the circuit is connected, and the motor of the fan assembly 3 is activated, driving the blades to rotate. When the button of the protection switch button assembly 72 is slid to the other end, the circuit is disconnected, and the motor of the fan assembly 3 is not activated, preventing the blades from rotating. This prevents the operator from accidentally turning on the fan after accidentally touching the shift knob unit 71.

[0117] The present invention provides a blower device for a hand-held fan, in which an inner case 1 forms an air passage 11, both sides of which are connected to an air intake 23 and an air exhaust 24, at least a portion of a fan assembly 3 is provided in the air passage 11, an outer case 2 covers the outside of the inner case 1, one side of a wiring opening 12 of the inner case 1 faces directly to the electrical connection part of the fan assembly 3, and the other side of the wiring opening 12 is used to face directly to the electrical connection part of a hand-held part 5 of the hand-held fan, and the electrical connection part of the fan assembly 3 is electrically connected to the electrical connection part of the hand-held part 5 by a conductor passing through the wiring opening 12. In this way, wiring opening 12 of inner case 1 allows the entrance and exit of the conductor connected to the electrical connection portion of fan assembly 3, and the conductor connected to the electrical connection portion of fan assembly 3 passes through wiring opening 12 from a position directly opposite the electrical connection portion of handle 5 of the hand-held fan, and then the conductor is connected to the electrical connection portion of handle 5 of the hand-held fan, which is advantageous for reducing the length of the conductor, improving durability, and improving the aesthetic appearance of the wiring. This achieves the technical effects of improving the stability, aesthetics, and durability of the wiring.

[0118] In order to provide a detailed description of the handheld fan of the present invention, the above-mentioned Example 1 provides a detailed description of the blowing device of the handheld fan, and based on the same concept, the present application further provides a handheld fan, for details, please refer to Example 2.

[0119] Example 8-2 refers to those shown in FIGS. 8-1 to 8-11.

[0120] A second embodiment of the present invention provides a handheld fan including the blower device of the handheld fan.

[0121] The present invention provides a hand-held fan in which an air passage 11 is formed by an inner case 1, both sides of the air passage 11 are connected to an intake port 23 and an exhaust port 24, at least a part of a fan assembly 3 is provided in the air passage 11, an outer case 2 is fitted over the outside of the inner case 1, one side of a wiring opening 12 of the inner case 1 faces directly to the electrical connection part of the fan assembly 3 and the other side of the wiring opening 12 is used to face directly to the electrical connection part of a hand-held part 5 of the hand-held fan, and the electrical connection part of the fan assembly 3 is electrically connected to the electrical connection part of the hand-held part 5 by a conductor passing through the wiring opening 12. In this way, wiring opening 12 of inner case 1 allows the entrance and exit of the conductor connected to the electrical connection portion of fan assembly 3, and the conductor connected to the electrical connection portion of fan assembly 3 passes through wiring opening 12 from a position directly opposite the electrical connection portion of handle 5 of the hand-held fan, and then the conductor is connected to the electrical connection portion of handle 5 of the hand-held fan, which is advantageous for reducing the length of the conductor, improving durability, and improving the aesthetic appearance of the wiring. This achieves the technical effects of improving the stability, aesthetics, and durability of the wiring.

[0122] Example 9-1 refers to those shown in FIGS. 9-1 to 9-6.

[0123] The present invention discloses a blowing mechanism for a handheld fan, in which an air passage 11 formed by an inner case 1 communicates with an intake port 12 and an exhaust port 13 on both sides, a fan assembly 3 is provided in the air passage 11, an outer case 2 is fitted to the outside of the inner case 1 and slidably connected to the inner case 1 along a first axial direction, the first axial direction being the direction from the intake port 12 to the exhaust port 13. Thus, during assembly, the outer case 2 is pushed out along the first axial direction to fit over the outside of the inner case 1, and the outer case 2 is slidably fitted over the inner case 1. During maintenance, the outer case 2 can be slidably separated from the inner case 1, facilitating removal of the outer case 2. This facilitates assembly and maintenance, and is advantageous in improving assembly efficiency and maintenance convenience. This achieves the technical effects of high assembly efficiency and easy maintenance.

[0124] 9-1 to 9-6, Fig. 9-1 is a structural schematic diagram of a blower mechanism for a hand-held fan according to an embodiment of the present invention, Fig. 9-2 is a structural schematic diagram of case 16 and support frame 17 in the blower mechanism for a hand-held fan according to an embodiment of the present invention, Fig. 9-3 is a structural schematic diagram of stopper rib 21 in the blower mechanism for a hand-held fan according to an embodiment of the present invention, Fig. 9-4 is a structural schematic diagram of exhaust port 13 in the blower mechanism for a hand-held fan according to an embodiment of the present invention, Fig. 9-5 is a structural schematic diagram of intake port 12 in the blower mechanism for a hand-held fan according to an embodiment of the present invention, and Fig. 9-6 is a structural schematic diagram of sleeve 22 and intake cover 23 in the blower mechanism for a hand-held fan according to an embodiment of the present invention. The blower mechanism for a hand-held fan according to embodiment 1 of the present invention includes inner case 1, outer case 2, and fan assembly 3, and inner case 1, outer case 2, and fan assembly 3 will be described in detail below.

[0125] The inner case 1 will now be described.

[0126] The inner case 1 is formed with an air passage 11, an intake port 12 communicating with one side of the air passage 11, and an exhaust port 13 communicating with the other side of the air passage 11. The inner case 1 includes a case 16 and a plurality of support frames 17 provided on the case 16, and the support frames 17 are slidably connected to the outer case 2 described below. The support frames 17 of the inner case 1 may be provided with stopper grooves 14 that match stopper ribs 21 described below. The case 16 of the inner case 1 widens from the intake port 12 in a direction approaching the exhaust port 13, and the plurality of support frames 17 are provided at one end of the case 16 close to the intake port 12, and the plurality of support frames 17 are all equally spaced apart.

[0127] Specifically, inner case 1 can include case 16 and a plurality of support frames 17 provided on case 16, and case 16 is flared in a direction from intake port 12 toward exhaust port 13, i.e., the inner diameter of one end of case 16 closer to intake port 12 is smaller than the inner diameter of one end of case 16 closer to exhaust port 13. Air path passage 11 formed inside case 16 of inner case 1 is used for the circulation of gas, and after gas enters air path passage 11 from intake port 12, the gas that has entered air path passage 11 is discharged from exhaust port 13. Stopper rib 21 is provided inside sleeve 22 of outer case 2, and stopper groove 14 that mates with stopper rib 21 is provided on case 16 of inner case 1, and stopper groove 14 is formed in the surface of case 16 of inner case 1 so as to be recessed toward the air path passage 11. The internal space of the stopper groove 14 can accommodate the stopper rib 21, allowing the stopper rib 21 to be fitted into the stopper groove 14. The locking groove 15 may be provided on the support frame 17 of the inner case 1, which supports the sleeve 22 of the outer case 2 and locks the locking joint 24 provided on the intake cover 23 of the outer case 2 with the locking groove 15, thereby realizing an interconnection between the intake cover 23 of the outer case 2 and the support frame 17 of the inner case 1 after the locking joint 24 of the intake cover 23 of the outer case 2 is locked with the locking groove 15, and also making it easy to remove the outer case 2 from the inner case 1.

[0128] The outer case 2 and the fan assembly 3 will now be described.

[0129] The outer case 2 is disposed to cover the outside of the inner case 1, and is slidably connected to the inner case 1 along a first axial direction, which is a direction from the intake port 12 to the exhaust port 13. The outer case 2 is provided with stopper ribs 21 that match the stopper grooves 14, the stopper grooves 14 extending along the first axial direction, and the stopper ribs 21 are provided slidably in the stopper grooves 14. There are a plurality of the stopper ribs 21 and a plurality of the stopper grooves 14, and the plurality of the stopper ribs 21 and the plurality of the stopper grooves 14 are provided in a one-to-one correspondence, and each of the stopper ribs 21 is fitted into the corresponding stopper groove 14. The outer case 2 includes a sleeve 22 and an intake cover 23, the sleeve 22 is fitted over the inner case 1, the stopper rib 21 is provided on the sleeve 22, the intake cover 23 is removably connected to the inner case 1, and the intake cover 23 is connected to the sleeve 22. The inner case 1 is provided with a locking groove 15, and the intake cover 23 is provided with a locking joint 24 corresponding to the locking groove 15, so that the locking joint 24 and the locking groove 15 are engaged with each other. The locking joint 24 is located between the sleeve 22 and the inner case 1, and the locking joints 24 are distributed along the first axial direction. The number of the locking joints 24 and the number of the locking grooves 15 are both plural, and the locking joints 24 and the locking grooves 15 are installed in one-to-one correspondence, and the locking joints 24 are all distributed at equal intervals. The fan assembly 3 is provided in the air passage 11 .

[0130] Specifically, there is a space inside the outer case 2 for accommodating the inner case 1, and the outer case 2 may include a sleeve 22 and an intake cover 23. A stopper rib 21 is provided on the inner wall of the sleeve 22 in the outer case 2 near the inner case 1, and the stopper rib 21 is aligned with the stopper groove 14 provided in the inner case 1. When the sleeve 22 in the outer case 2 is slidably inserted from one end of the inner case 1, the stopper rib 21 is inserted from one end opening of the stopper groove 14 located on the inner case 1, and at this time, the stopper rib 21 slides in a direction from one end of the stopper groove 14 toward the other end of the stopper groove 14, moving the sleeve 22 in the outer case 2 along the extension direction of the length of the stopper groove 14 in the inner case 1.

[0131] Note that the term "plurality of stopper ribs 21" may refer to one stopper rib 21, two stopper ribs 21, three stopper ribs 21, four stopper ribs 21, etc., and the term "plurality of stopper grooves 14" may refer to one stopper groove 14, two stopper grooves 14, three stopper grooves 14, four stopper grooves 14, etc. When the number of stopper grooves 14 is two, the two stopper grooves 14 may be distributed symmetrically on both sides of the inner case 1, and the two stopper grooves 14 are parallel to each other. In this way, the two stopper ribs 21 located on the sleeve 22 of the outer case 2 slide along the corresponding one of the stopper grooves 14, and after the sleeve 22 of the outer case 2 is attached to the inner case 1, the two stopper ribs 21 respectively fitted into the stopper grooves 14 are positioned and restricted from both sides of the sleeve 22 of the outer case 2, which improves the adhesion of the sleeve 22 of the outer case 2 and makes it easier for the sleeve 22 of the outer case 2 to be slidably attached to the inner case 1. The fan assembly 3 may include a motor and blades driven by the motor, and the motor may be mounted within the air passage 11 of the inner case 1, with the case 16 of the inner case 1 providing support for the motor. The rotating shaft of the motor rotates the blades, driving them so that air enters the air passage 11 from the intake port 12, and the air that has entered the air passage 11 is discharged from the exhaust port 13. When the outer case 2 and the handle 4 are connected, the fan can be easily held and carried by an operator.

[0132] The present invention provides a blowing mechanism for a handheld fan, in which an air passage 11 formed by an inner case 1 communicates with an intake port 12 and an exhaust port 13 on both sides, a fan assembly 3 is installed in the air passage 11, an outer case 2 is fitted to the outside of the inner case 1 and slidably connected to the inner case 1 along a first axial direction, the first axial direction being from the intake port 12 to the exhaust port 13. Thus, during assembly, the outer case 2 is pushed out along the first axial direction to fit over the outside of the inner case 1, and the outer case 2 is slidably fitted over the inner case 1. During maintenance, the outer case 2 can be slidably separated from the inner case 1, facilitating removal of the outer case 2. This facilitates assembly and maintenance, and is advantageous in improving assembly efficiency and maintenance convenience. This achieves the technical effects of high assembly efficiency and easy maintenance.

[0133] In order to provide a detailed description of the handheld fan of the present invention, the above Example 1 provides a detailed description of the blowing mechanism of the handheld fan. Based on the same concept, the present application further provides a handheld fan, and details are given in Example 2.

[0134] Example 9-2

[0135] A second embodiment of the present invention provides a handheld fan including the blowing mechanism of the handheld fan.

[0136] The present invention provides a handheld fan in which both sides of an air passage 11 formed by an inner case 1 communicate with an air intake port 12 and an air exhaust port 13, respectively, a fan assembly 3 is installed in the air passage 11, and an outer case 2 is fitted to the outside of the inner case 1 and slidably connected to the inner case 1 along a first axial direction, the first axial direction being the direction from the air intake port 12 to the air exhaust port 13. Thus, during assembly, the outer case 2 is pushed out along the first axial direction to fit over the outside of the inner case 1, and the outer case 2 slidably fits over the inner case 1. During maintenance, the outer case 2 can be slidably separated from the inner case 1, making it easy to remove. This facilitates assembly and maintenance, and is advantageous in improving assembly efficiency and maintenance convenience. This achieves the technical effects of high assembly efficiency and easy maintenance.

[0137] Example 10 refers to those shown in Figures 10-1 to 10-9.

[0138] As shown in Figures 10-1 to 10-9, in order to solve the problem of vibration and noise caused by the vibration caused by the rotation of the blades when the motor rotates at high speed during use of a hand-held fan, the present invention provides a hand-held fan. Figure 10-1 is a schematic diagram of a hand-held fan according to an embodiment of the present invention, comprising a blower unit 10 and a hand-held unit 20. Figure 10-2 is an exploded schematic diagram of a hand-held fan according to an embodiment of the present invention, comprising a case 11, an intake cover 12 removably connected to the case 11, and a motor 13 mounted within the case 11. A motor shaft 131 rotatable relative to the motor 13 is mounted within the shaft hole of the motor 13, blades 15 are connected to the top of the motor shaft 131, and a vibration damping spring 132 is mounted between the motor 13 and the blades 15, and the vibration damping spring 132 is fitted onto the motor shaft 131.

[0139] Furthermore, referring to Figure 10-3, it is a schematic diagram of an intake cover according to an embodiment of the present invention, in which the intake cover 12 includes an intake plate 121, a first side wall 122 connected to the intake plate 121 and wound around a predetermined axis, and a second side wall 123 wound around the outer periphery of the first side wall 122. Referring to Figure 10-4, it is a schematic diagram of an air passage formation according to an embodiment of the present invention, in which an air passage 16 is formed between the first side wall 122 and the second side wall 123, the minimum inner diameter of the second side wall 123 is larger than the maximum outer diameter of the first side wall 122, and by ensuring the air passage width between the second side wall 123 and the first side wall 122, not only can the air flow area be secured, but the wind loss of the second side wall 123 can be reduced and the wind in the air passage can be properly guided, resulting in high air flow efficiency and smoother air flow.

[0140] Specifically, in an embodiment of the present invention, when a user uses the handheld fan, the blades 15 rotate by being driven by the motor 13, and guide the air from the intake cover 12 into the space between the first side wall 122 and the second side wall 123 and blow it out from the exhaust port side, and the user can hold the handheld fan and blow the air toward the area where the temperature needs to be lowered, thereby quickly lowering the temperature and achieving the purpose of improving human comfort.

[0141] Further, referring to Figure 10-5, it is a schematic diagram of a blade according to an embodiment of the present invention, in which the blade 15 includes a conical chamber 151 and a blade 152 arranged on the outside of the conical chamber 151, the blade 152 has a diagonal flow shape, and a diagonal flow passage 153 is formed between two adjacent blades 152, the diagonal flow passage 153 is used to guide the wind from the intake cover 12 to the space of the air passage 16 formed between the first side wall 122 and the second side wall 123, thereby reducing the wind from colliding with the inner wall of the cover, reducing wind loss and improving ventilation efficiency, it is preferable that the blade 152 of the handheld fan has a diagonal flow shape, which increases the air volume of the handheld fan, reduces noise, makes the structure more compact, and is convenient to hold and carry.

[0142] Furthermore, referring to Figure 10-6, which is a bottom view of the blower unit according to an embodiment of the present invention, a motor bearing 14 is fitted onto the motor 13, and the motor bearing 14 is installed within the conical chamber 151. The installation of the motor bearing 14 ensures the stability of the motor 13 when rotating at high speed, and further ensures the operating stability of the entire handheld fan.

[0143] Furthermore, referring to Figure 10-7, this is a schematic diagram of a motor shaft and blades molded integrally in an embodiment of the present invention. In this embodiment of the present invention, the motor shaft 131 and blades 15 are molded integrally, and a metal ring 17 is fixed between the motor shaft 131 and the blades 15. The metal ring 17 passes through the motor shaft 131 to fix the motor shaft 131 and the blades 15. The installation of the structure in which the blades 15 and the motor shaft 131 are molded integrally effectively reduces the space occupied by the blower unit 10.

[0144] Furthermore, referring to Figure 10-8, which is a schematic diagram of a vibration-damping spring according to an embodiment of the present invention, in this embodiment of the present invention, the vibration-damping spring 132 and the motor rotating shaft 131 are detachably connected, and the vibration-damping spring 132 can be replaced after being damaged. Furthermore, since different positions require different vibration-damping strengths, the inner diameter of the vibration-damping spring 132 and the spacing between adjacent turns are all different.

[0145] Specifically, the spring inner diameter 1321 at one end of the vibration damping spring 132 away from the motor 13 is larger than the spring inner diameter 1322 at one end of the vibration damping spring 132 closer to the motor 13, and the spacing 1323 between adjacent windings at one end of the vibration damping spring 132 away from the motor 13 is smaller than the spacing 1324 between adjacent windings at one end of the vibration damping spring 132 closer to the motor 13.

[0146] Further, referring to Figure 10-9, Figure 10-9 is a connection diagram between the blowing unit and the hand-held unit according to an embodiment of the present invention, in which a first connecting member 18 is provided on the blowing unit 10, a second connecting member 21 is provided on the hand-held unit 20, the blowing unit 10 and the hand-held unit 20 are connected by a fixing member 22, the fixing member 22 penetrates the first connecting member 18 and the second connecting member 21 to connect the blowing unit 10 and the hand-held unit 20, for example, the fixing member 22 may be a screw or another fixing member 22 for connecting the blowing unit 10 and the hand-held unit 20, and here, the embodiment of the present invention is not further limited.

[0147] The present invention provides a handheld fan, the handheld fan comprising a blower and a handle, the blower comprising a case, an intake cover detachably connected to the case, and a motor mounted within the case, a motor shaft mounted within the motor shaft hole and rotatable relative to the motor, blades connected to the top of the motor shaft, a vibration-damping spring mounted between the motor and the blades, the vibration-damping spring being fitted around the motor shaft. The handheld fan of the present invention uses the vibration-damping spring to reduce vibrations and noise caused by the vibrations caused by the rotation of the blades when the motor rotates at high speed, improving overall user comfort and providing a better user experience.

[0148] Example 11 refers to those shown in Figures 11-1 to 11-6.

[0149] As shown in FIG. 11-1, the handheld fan according to the embodiment of the present invention includes a blower unit 100, a handheld unit 200, and a blower assembly 300, and the handheld unit 200 is connected to the blower unit 100.

[0150] As shown in the exploded view of the handheld fan according to this embodiment in FIG. 11-2, the blower unit 100 includes an intake cover 110. As shown in FIG.

[0151] As shown in the oblique view of the air intake cover 110 of the handheld fan of this embodiment in Figure 11-3, the air intake cover 110 has an air intake cover main body 112 and an air guide section 111 connected to the air intake cover main body 112 and extending toward the air blower assembly 300, and a first accommodating cavity 120 is provided within the air blower section 100.

[0152] Figure 11-4 is a cross-sectional view of the hand-held fan of this embodiment taken along the AA cross-sectional line, and Figure 11-5 is an oblique view of the blower assembly 300 of the hand-held fan of this embodiment in a certain direction, where the blower assembly 300 is provided in the first accommodating cavity 120, and the first accommodating cavity 120 includes an air guide cone 320 and a fan blade 310 provided in the air guide cone 320, and there is a first gap between the air guide cone 320 and the air guide section 111.

[0153] Specifically, the intake cover body 112 may be any component capable of cooperating with the air guide portion 111 to guide air. For example, the intake cover body 112 may be an air guide assembly such as an air guide plate or an air guide hole, and the intake cover body 112 may be a base structure for supporting the air guide portion 111 of the intake cover 110, thereby improving the stability of the entire structure of the intake cover 110. Therefore, the structure of the intake cover body 112 is not specifically limited herein, and those skilled in the art can configure the structure of the intake cover body 112 according to specific needs in specific applications.

[0154] Specifically, the blower assembly 300 may be a fan module, and the air guide cone 320 can be rotated by a motor, thereby allowing the blades 310 provided on the air guide cone 320 to rotate along with the air guide cone 320, and further allowing the gas that has entered the first accommodating cavity 120 through the intake cover 110 to be sent out from the blower section 100 as the fan blades 310 rotate.

[0155] As can be appreciated, the shape of the air guide cone 320 may be a pyramid, a truncated pyramid, or, for example, the air guide cone 320 may be a side wall arranged around an axial direction, with the inner diameter gradually decreasing or gradually increasing from one end to the other.

[0156] Specifically, the fan blades 310 may be mixed-flow blades, and the gas flows along the surface of the airflow cone 320 along the airflow paths between adjacent fan blades 310 .

[0157] Specifically, the hand-held portion 200 may be any structural member for holding the electric fan, and is not particularly limited here.

[0158] If there were no gap between the blower assembly 300 and the air guide portion 111 of the intake cover 110 extending toward the blower assembly 300, the airflow entering through the intake cover 110 would create turbulence, causing the airflow to interfere with each other and generating loud noise. Therefore, the present invention provides a gap between the air guide portion 111 and the air guide cone 320, on which the fan blades 310 are provided, thereby reducing the turbulence caused by the airflow entering through the intake cover 110 and further reducing the interference between the airflows, thereby reducing noise caused by the interference of the airflows.

[0159] In a preferred implementation, the first gap distance is greater than 1 mm and less than 14 mm, as shown in FIG. 11-4.

[0160] As can be seen, providing a gap between the air guide cone 320 and the air guide portion 111 can effectively reduce turbulence between the air guide cone 320 and the air guide portion 111. If the gap distance between the air guide cone 320 and the air guide portion 111 is designed to be too large, the air path distance becomes too long, which lengthens the time required for the air to be blown from the intake cover 110 to the exhaust port and reduces the air blowing efficiency of the fan. Therefore, by designing the gap distance between the air guide cone 320 and the air guide portion 111 to be between 1 mm and 14 mm, the fan can ensure a certain air blowing efficiency, effectively reduce turbulence, and reduce noise caused by the fan.

[0161] In a preferred embodiment, the fan blades 310 are located between the end faces of both ends of the air guide cone 320, as shown in FIGS. 11-4 and 11-5.

[0162] As can be seen, by positioning the fan blade 310 between the end faces of both ends of the air guide cone 320, it is possible to avoid the problem of the fan blade 310 extending beyond the end faces of both ends of the air guide cone 320 creating an obstacle between the air guide cone 320 and the air guide section 111, which would cause turbulence between the air guide cone 320 and the air guide section 111 and increase in noise from the fan.

[0163] In a preferred embodiment, as shown in FIG. 11-3, the air guide section 111 is a column, one end of the air guide section 111 is located in the first accommodating cavity 120, and the first gap is formed between one end of the air guide cone 320 close to the intake cover 110 and one end of the air guide section 111 close to the air guide cone 320.

[0164] Specifically, in this implementation, the air guide section 111 may be a cylinder, a triangular prism, a cube or a rectangular prism, and the air guide section 111 is designed in different shapes so that the air entering the first accommodating cavity 120 flows along the surface of the air guide section 111, thereby playing a guiding role for the air entering the first accommodating cavity 120. Therefore, in specific applications, engineers in the relevant fields can design the specific shape of the air guide section 111 according to specific needs.

[0165] As can be understood, the length by which the air guide section 111 is inserted into the first accommodating cavity 120 may be determined by the specific distance value of the first gap, and the larger the distance value of the first gap, the shorter the length by which the air guide section 111 is inserted into the first accommodating cavity 120, and the smaller the distance value of the first gap, the shorter the length by which the air guide section 111 is inserted into the first accommodating cavity 120.

[0166] In a preferred embodiment, as shown in Figures 11-2 to 11-4, the end face of one end of the air guide cone 320 close to the intake cover 110 is circular, and the diameter of the end face of the one end of the air guide cone 320 close to the intake cover 110 is smaller than the diameter of the circumscribed circle of the end face of the air guide section 111.

[0167] As can be seen, by designing the end face of one end of the air guide cone 320 close to the intake cover 110 to be circular, the structural stability of the air guide cone 320 can be effectively improved compared to when the end of the air guide cone 320 close to the intake cover 110 is an apex.

[0168] As can be understood, the end face of the airflow guidance section 111 may be square, triangular, or circular, and is not specifically limited here.

[0169] Preferably, the axis of the air guide cone 320 may overlap with the axis of the air guide section 111. In this way, when the diameter of the circumscribed circle of the end face of the air guide section 111 is larger than the diameter of the end face of the one end of the air guide cone 320 closer to the intake cover 110, the wind along the surface of the air guide section 111 is not blocked by the end face of the one end of the air guide cone 320 closer to the intake cover 110 in the process of flowing into the air passage formed by the air guide cone 320 and the fan blades 310, and all the wind guided by the air guide section 111 is introduced into the air passage, thereby improving the air blowing efficiency of the fan.

[0170] In a preferred embodiment, as shown in the perspective view of the hand-held fan blowing assembly 300 of FIG. 11-6 at another angle, the blowing assembly 300 further includes a rotating shaft 330 provided in the cavity of the air guide cone 320, and the rotating shaft 330 is used to rotate the air guide cone 320 around a predetermined axial direction, which is the blowing direction of the air blowing section 100.

[0171] Specifically, the air guide cone 320 can be made hollow to form a cavity, and by locating the rotating shaft 330 within the cavity of the air guide cone 320, not only can the space be utilized effectively, but also the rotation shaft 330 can be avoided from being located outside the air guide cone 320, which would otherwise cause turbulence.

[0172] In a preferred embodiment, as shown in FIGS. 11-4 to 11-6, the blower assembly 300 further includes a number of support plates 340, which are connected between the inner wall of the air guide cone 320 and the rotating shaft 330.

[0173] As can be seen, by attaching the support plate 340 between the inner wall of the air guide cone 320 and the rotating shaft 330, the connection between the air guide cone 320 and the rotating shaft 330 can be made more stable and stronger.

[0174] More preferably, in order to improve the stability of the connection between the air guide cone 320 and the rotating shaft 330, a number of support plates 340 can be installed around the outer periphery of the rotating shaft 330. Furthermore, by uniformly installing the support plates 340 around the outer periphery of the rotating shaft 330, the stability of the connection between the air guide cone 320 and the rotating shaft 330 can be further improved.

[0175] In a preferred embodiment, as shown in Figures 11-4 to 11-6, the blower assembly 300 further includes a sleeve 350 fitted around the outer periphery of the rotating shaft 330, and the support plate 340 and the rotating shaft 330 are connected via the sleeve 350.

[0176] Preferably, one end of the sleeve 350 may be connected to one end connected to the rotating shaft 330 of the air guide cone 320. Since the rotating shaft 330 needs to be driven to rotate the air guide cone 320, connecting the sleeve 350 between the support plate 340 and the rotating shaft 330 can provide a vibration damping effect to the support plate 340 and further ensure the stability of the connection between the support plate 340 and the air guide cone 320.

[0177] In a preferred embodiment, as shown in FIGS. 11-4 to 11-6, the rotating shaft 330, the sleeve 350 and the air guide cone 320 are integrally formed.

[0178] As can be seen, by integrally molding the sleeve 350 and the rotating shaft 330, the stability of the connection between the sleeve 350 and the rotating shaft 330 can be ensured.

[0179] Specifically, the first end of the air guide cone 320 close to the intake cover 110 may be closed, and one end of the rotating shaft 330 may be integrally molded with the first end of the air guide cone 320, thereby improving the stability of the connection between the air guide cone 320 and the rotating shaft 330.

[0180] In a preferred embodiment, as shown in FIGS. 11-2 to 11-4, the diameter of the circumscribed circle of the end face of the airflow guidance section 111 is greater than 5 mm and smaller than 12 mm.

[0181] The end face of the air guide cone 320 close to the intake cover 110 is circular, and the diameter of the end face of the air guide cone 320 close to the intake cover 110 is greater than 1 mm and smaller than 7 mm.

[0182] As can be seen, by setting the diameter of the circumscribing circle of the end face of the air guide section 111 large and the diameter of the end face of one end of the air guide cone 320 close to the intake cover 110 small, the wind along the surface of the air guide section 111 is not blocked by the end face of the one end of the air guide cone 320 close to the intake cover 110 as it flows into the air path formed by the air guide cone 320 and the fan blades 310, or is less blocked by the end face of the one end of the air guide cone 320 close to the intake cover 110, and as much of the wind guided by the air guide section 111 as possible is introduced into the air path, improving the air blowing efficiency of the fan.

[0183] In addition, by designing the diameter of the circumscribed circle of the end face of the air guide section 111 to be large, the air guide section 111 can be used as a support structure for the air intake cover main body 112, making the stability of the air intake cover main body 112 stronger, and by setting the diameter of the end face of one end of the air guide cone 320 close to the air intake cover 110 to be small, the volume of the air guide cone 320 can be reduced, and further, the air guide cone 320 can occupy less space in the first accommodating cavity 120, and by increasing the volume of the air path formed in the air blower section 100, more air can be sent out through the air blower section 100, improving the air blowing efficiency of the fan.

[0184] More preferably, the diameter of the circumscribing circle of the end face of the air guide section 111 may be 8 mm, and the diameter of the end face of the one end of the air guide cone 320 close to the intake cover 110 may be 4 mm. In this way, the diameter of the circumscribing circle of the end face of the air guide section 111 is larger than the diameter of the end face of the one end of the air guide cone 320 close to the intake cover 110. As a result, the wind flowing along the surface of the air guide section 111 is not blocked by the end face of the one end of the air guide cone 320 close to the intake cover 110 while flowing into the air passage formed by the air guide cone 320 and the fan blades 310, and all the wind guided by the air guide section 111 is introduced into the air passage, thereby improving the air blowing efficiency of the fan.

[0185] In a preferred embodiment, as shown in FIG. 11-4, the blower assembly 300 further includes a collar 360 fitted around the outer periphery of the rotating shaft 330, and the collar 360 is fitted between the rotating shaft 330 and the sleeve 350.

[0186] As can be seen, the collar 360 fitted between the rotating shaft 330 and the sleeve 350 can make the fit between the rotating shaft 330 and the sleeve 350 stronger, preventing slippage and improving the strength of the rotating shaft 330.

[0187] In a preferred implementation, the collar 360 and the rotating shaft 330 are integrally molded, as shown in FIG. 11-4.

[0188] As can be seen, by integrally molding the collar 360 and the rotating shaft 330, the stability of the fit between the collar 360 and the rotating shaft 330 can be improved, and the strength of the rotating shaft 330 can be further improved.

[0189] Example 12 refers to those shown in Figures 12-1 to 12-5.

[0190] As shown in the perspective view of the hand-held fan in FIG. 12-1, the perspective view of the hand-held fan at a different angle in FIG. 12-3, and the cross-sectional view of the hand-held fan taken along the AA cross-sectional line in FIG. 12-2, the hand-held fan includes an intake cover 100, an exhaust cover 200, a first case 300, a hand-held portion 400, and a fan module 500, the intake cover 100 includes a plurality of air guide plates 110 connected to each other and arranged radially around a predetermined axial direction, the predetermined axial direction being the axial direction from the intake cover 100 to the exhaust cover 200, an intake gap is provided between two adjacent air guide plates 110, and each of the air guide plates 110 protrudes toward a side away from the exhaust cover 200, The first case 300 is connected between the intake cover 100 and the exhaust cover 200, and a first accommodating cavity is enclosed by the first case 300, the intake cover 100, and the exhaust cover 200; One end of the handle 400 is connected to the first case 300, The fan module 500 is disposed in the first accommodating cavity.

[0191] Specifically, the intake cover 100 and the exhaust cover 200 may be installed facing each other so that the air flow efficiency of the formed air flow path is sufficiently high.

[0192] Specifically, the connection of the plurality of air guide plates 110 may be realized by connecting first ends of the plurality of air guide plates 110 to each other and connecting second ends of the plurality of air guide plates 110 to each other.

[0193] Specifically, the handle 400 may have any structure for holding, and is not particularly limited here.

[0194] Specifically, the fan module 500 may be any fan, for example, an axial fan, a centrifugal fan, or a mixed flow fan, and is not specifically limited here.

[0195] As can be understood, the connection method here may be integral molding or may be connection by a connecting member, and is not specifically limited here.

[0196] In this way, the air guide plates 110 of the intake cover 100 protrude toward the side away from the exhaust cover 200, and the air guide plates 110 are connected to each other and arranged radially around a predetermined axial direction, and the overall shape of the intake cover 100 protrudes toward the side away from the exhaust cover 200. This can effectively increase the intake volume of the intake cover 100 compared to when the exhaust cover 200 is flat or the exhaust cover is concave toward the side away from the exhaust cover 200. Therefore, when the fan module 500 in the first accommodating cavity is operating, more wind can be introduced into the first accommodating cavity through the intake cover 100 and sent to the exhaust cover 200 to be blown out, thereby increasing the intake efficiency of the intake cover 100 and the exhaust efficiency of the exhaust cover 200, and further improving the cooling efficiency of the handheld fan.

[0197] In a preferred embodiment, as shown in the perspective view of the air intake cover 100 of the handheld fan in Figure 12-4, the air intake cover 100 further includes a first base 120 and a ring 130 arranged around the outer periphery of the first base 120 around the predetermined axial direction, and a first end of the first base 120 away from the exhaust cover 200 is closed and the other end is open.

[0198] Specifically, the multiple air guide plates 110 can be connected between the first base 120 and the ring 130, and by connecting the first base 120 and the ring 130 to both ends of the air guide plate 110, the stability of the connection between the air guide plates 110 can be ensured.On the other hand, since the air guide plates 110 are arranged around the first base 120, by connecting them to the first base 120 via the air guide plates 110, the stability of the structure of the entire intake cover 100 can be ensured.

[0199] As can be understood, by closing the first end of the first base 120 away from the exhaust cover 200, wind can be prevented from entering the cavity of the first base 120, thereby avoiding impact on the first base 120 due to excessively high wind speed on the intake cover 100 side when the fan module 500 is operating, and further avoiding the problem of structural instability of the intake cover 100 due to impact on the first base 120.

[0200] In a preferred implementation, the first substrate 120 is a hollow cylinder, as shown in FIG. 12-4.

[0201] Furthermore, by designing the first base 120 to have a hollow structure, the weight of the handheld fan can be effectively reduced, making the handheld fan more convenient to carry. Furthermore, by designing the first base 120 to have a hollow structure, the material of the first base 120 can be saved, reducing the manufacturing costs of the handheld fan.

[0202] As can be seen, since the air guide plate 110 is arranged between the first base 120 and the ring 130, compared to designing the first base 120 to have another structure, by designing the first base 120 to be a cylinder, the shape and length of each air guide plate 110 can be kept the same, thereby ensuring that the air guide space formed between any two air guide plates 110 is the same, which can ensure that the distribution of air when the intake cover 100 takes in air is more uniform, and furthermore, it can ensure that the distribution of air sent out from the exhaust cover 200 is also more uniform, avoiding the user from having a bad experience when the air sent out from the exhaust cover 200 side is uneven.

[0203] In a preferred embodiment, as shown in FIG. 12-4, the end face of the first end of the first base body 120 is recessed inward from the end face of the annular ring 130 at the end remote from the exhaust cover 200 .

[0204] In this embodiment, the inward recess of the end face of the first end of the first base 120 means that the end face of the first end of the first base 120 protrudes in a direction approaching the exhaust cover 200.

[0205] As can be seen, the end face of the first end of the first base 120 is recessed more inward than the end face of the end of the ring 130 that is remote from the exhaust cover 200, and the air guide plate 110 is connected between the first base 120 and the ring 130 and protrudes toward the side remote from the exhaust cover 200, thereby making the intake cover 100 protrude more widely toward the side remote from the exhaust cover 200, thereby increasing the intake area of ​​the intake cover 100 and allowing the intake area of ​​the intake cover 100 to be increased without changing the volume of the handheld fan, thereby increasing the intake efficiency of the handheld fan and improving the cooling efficiency of the handheld fan.

[0206] In a preferred implementation, as shown in FIG. 12-4, the inner diameter of the ring 130 is larger than the outer diameter of the first substrate 120, and the inner diameter of the ring 130 gradually decreases in the exhaust direction.

[0207] As can be seen, because the inner diameter of the ring 130 is larger than the outer diameter of the first base 120, an intake passage is formed between the ring 130 and the first base 120, and the intake air can enter the first accommodating cavity through this intake passage; because the inner diameter of the ring 130 gradually decreases toward the exhaust direction, the air entering the intake cover 100 is compressed, which can increase the pressure of the intake air on the intake cover 100 side, increase the wind speed of the intake air on the intake cover 100 side, and improve the intake efficiency of the handheld fan.

[0208] In a preferred implementation, as shown in FIG. 12-4, a plurality of the air guide plates 110 are uniformly arranged around the outer periphery of the first substrate 120 and connected between the ring 130 and the first end of the first substrate 120.

[0209] As can be seen, by uniformly arranging a plurality of air guide plates 110 around the outer periphery of the first base 120, the gap distance between any two adjacent air guide plates 110 can be made equal, and by uniformly arranging a plurality of air guide plates 110 around the outer periphery of the first base 120, the air intake of the air intake cover 100 can be made more uniform, thereby making the air intake process of the air intake cover 100 more stable and avoiding the unpleasant user experience caused by uneven exhaust when the handheld fan exhausts.

[0210] By connecting multiple air guide plates 110 between the ring 130 and the first end of the first base 120, it is possible to prevent a part of the first base 120 from being located outside the first accommodating cavity, thereby avoiding an increase in the volume of the handheld fan and making the handheld fan difficult to carry.

[0211] In a preferred embodiment, as shown in FIG. 12-4, the width of the air guide plate 110 gradually decreases along the extending direction from the outer periphery of the air intake cover 100 to the center of the air intake cover 100.

[0212] As can be seen, the air guide plate 110 has a certain width, which can make the structure of the air guide plate 110 more stable when guiding air. The width of the air guide plate 110 gradually decreases from the outer periphery of the air intake cover 100 toward the center of the air intake cover 100, which ensures the stability of the structure of the air guide plate 110 and further saves the material of the air guide plate 110, thereby reducing the manufacturing costs of the handheld fan.

[0213] In a preferred embodiment, as shown in FIG. 12-4, the first substrate 120, the ring 130 and the plurality of baffle plates 110 are integrally formed.

[0214] As can be seen, the first base 120, the ring 130 and the multiple air guide plates 110 are integrally molded, thereby ensuring the structural stability of the air intake cover 100 and preventing the air intake cover 100 from being structurally weak when subjected to the impact of intake air, thereby avoiding the air intake efficiency of the handheld fan being affected.

[0215] In a preferred embodiment, as shown in Fig. 12-5, a perspective view of the first side wall 310 of the hand-held fan, Fig. 12-1 and Fig. 12-4, the first case 300 includes a first side wall 310, and the first side wall 310 is disposed around the outer periphery of the intake cover 100 around the predetermined axial direction; The intake cover 100 has a number of first snaps 140 on its inner edge, a first through-hole 311 that matches with the first snap 140 is provided at one end of the first side wall 310 that is close to the intake cover 100, and the first through-hole 311 opens on a side away from the first side wall 310; The first snap 140 includes an insert portion, a second end of the insert portion is curved to form a chamfer, and the second end is spaced apart from one side of the intake cover 100; The insertion portion is inserted into the first through-hole 311 along the intake direction, and the chamfer is engaged with the inner wall of the first side wall 310, thereby connecting the first side wall 310 and the intake cover 100.

[0216] As can be seen, the inside of the intake cover 100 and the inside of the first side wall 310 are respectively the sides closer to the first storage cavity.

[0217] Preferably, as shown in Figures 12-4 and 12-5, the first side wall 310 may have a chamfered surface 313 on one edge close to the intake cover 100, and the chamfered surface 313 extends toward the center of the intake cover 100, and the chamfered surface 313 of the first side wall 310 is connected to the intake cover 100, thereby realizing a connection between the first side wall 310 and the intake cover 100. Specifically, in this implementation method, the first through hole 311 may be provided on the chamfered surface 313 of the first side wall 310, and the first snap 140 provided on the inner edge of the intake cover 100 may be provided on the inside of the ring 130 of the intake cover 100. By inserting the first snap 140 into the first through hole 311 and engaging the chamfer of the first snap 140 with the inner wall of the chamfered surface 313 of the first side wall 310, the intake cover 100 is engaged with the first side wall 310 from the inside of the first accommodating cavity, thereby avoiding the problem that when the intake cover 100 and the first side wall 310 are engaged from the outside, the connection structure between the intake cover 100 and the first side wall 310 is easily destroyed, and the integrity of the intake cover 100 and the first side wall 310 cannot be guaranteed.

[0218] In a preferred embodiment, as shown in Fig. 12-4 to Fig. 12-5, the intake cover 100 is further provided with a number of first insert members 150 at its inner edge; A second through-hole 312 is provided on the inner side of one end of the first side wall 310 that is close to the intake cover 100, and the second through-hole 312 is aligned with the first insertion member 150. The first insertion member 150 is inserted into the second through-hole 312 and fixed in the second through-hole 312, thereby connecting the intake cover 100 and the first side wall 310 together.

[0219] As can be seen, the inside of the intake cover 100 and the inside of the first side wall 310 are respectively the sides closer to the first storage cavity.

[0220] Preferably, as shown in Figures 12-4 and 12-5, the first side wall 310 may have a chamfered surface 313 on one edge close to the intake cover 100, and the chamfered surface 313 extends toward the center of the intake cover 100, and the chamfered surface 313 of the first side wall 310 is connected to the intake cover 100, thereby realizing a connection between the first side wall 310 and the intake cover 100. Specifically, in this implementation method, the second through hole 312 may be provided on the chamfered surface 313 of the first side wall 310, and the first insertion member provided on the inner edge of the intake cover 100 may be provided on the inner wall of the ring 130 of the intake cover 100. By inserting the first insertion member 150 into the second through hole 312, the intake cover 100 is connected to the first side wall 310 from the inside of the first accommodating cavity, thereby avoiding the problem that the connection structure between the intake cover 100 and the first side wall 310 is easily destroyed when the intake cover 100 and the first side wall 310 are connected from the outside, and the integrity of the intake cover 100 and the first side wall 310 cannot be guaranteed.

[0221] Example 13 refers to those shown in Figures 13-1 to 13-6.

[0222] 13-1 to 13-6, the present invention provides a handheld fan that is easy to remove and install, easy to inspect, and solves the problems of extending the service life of the handheld fan.

[0223] Specifically, referring to the oblique view of a handheld fan according to an embodiment of the present invention in Figure 13-1, the handheld fan includes a blower unit 10 and a hand-held unit 20, and referring to Figures 13-2 to 13-3, the blower unit 10 includes a first inner case 101, a second inner case 102 that engages with the first inner case 101, and an outer case 103, and protrusion structures 1010 are uniformly provided on the side of the first inner case 101 facing the second inner case 102, and recess structures 1020 are provided corresponding to the protrusion structures of the second inner case 102, and the protrusion structures 1010 and the recess structures 1020 engage with each other, and the outer case 103 is covered on the outside of the first inner case 101 and the second inner case 102 so as to accommodate the first inner case 101 and the second inner case 102. The first inner case 101 has uniformly formed protrusion structures 1010 on the outer wall edge facing the second inner case 102, and the second inner case 102 has formed recess structures 1020 corresponding to the protrusion structures 1010 on the outer wall facing the first inner case 101, by using a structural installation method that allows the protrusion structures 1010 and the recess structures 1020 to be tightly interlocked, thereby realizing tight interlocking between the first inner case 101 and the second inner case 102 and ensuring easy installation and removal between the first inner case 101 and the second inner case 102. Furthermore, the installation method of engaging the first inner case 101 and the second inner case 102 by providing the protrusion structures 1010 and the recess structures 1020 makes it easy to install and remove the first inner case 101 during later inspection, facilitating inspection.

[0224] Furthermore, a fan base 111 is installed in the second inner case 102, a fan impeller 112 is installed on the side of the fan base 111 facing the first inner case 101, a conical chamber is installed in the fan impeller 112, a bearing 113 is installed in the conical chamber, 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 installed around the outside of the motor shaft 114, and 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 and further ensures the operation stability of the entire handheld fan.

[0225] Specifically, a receiving cavity 123 is provided at the rear side of the fan base 111, an exhaust part 121 is provided between the outside of the receiving cavity 123 and the inside of the first inner case 101, and a connecting plate 1230 is provided at an interval on the outer wall of the receiving cavity 123, and the connecting plate 1230 is connected to the inner wall of the second inner case 102. The installation of the connecting plate 1230 strengthens the stability between the second inner case 102 and the receiving cavity 123, improving the stability of the fan base 111 when the handheld fan is in operation.

[0226] Furthermore, as shown in FIG. 13-4 , a first circuit board 116 is attached to the rear of the fan base 111, a second circuit board 204 is provided in the handle, and a first wiring passage 117 is opened radially from the fan base 111 to accommodate wires running from the first circuit board 116 to the second circuit board 204. The wires are routed from the first circuit board 116 to the second circuit board 204, and the second circuit board 204 is provided in the handle 20, facilitating wiring. The provision of the first wiring passage 117 prevents wires from bending when connected to the circuit board, thereby extending their service life. The wires bypass the outside of the fan impeller 112 before connecting to the second circuit board 204, preventing them from coming into contact with the fan impeller 112, resulting in short circuits and poor contact. During assembly, the central conductor is placed in the first wiring passage 117, which allows for effective use of space, and by ensuring space due to the limited internal space, it is possible to prevent the conductor from being crushed during assembly.

[0227] Specifically, as shown in FIG. 13-5, the handle 20 is provided with a first connecting member 203, and the blower 10 is provided with a second connecting member 105. The blower 10 and the handheld 20 are connected via a fixing member 131, which passes through the first connecting member 203 and the second connecting member 105 to connect the blower 10 and the handheld 20. A portion of the handheld 20 is fitted into the blower 10. The first connecting member 203 and the second connecting member 105 are fixedly connected by the fixing member 131, thereby ensuring the overall stability of the handheld fan during use. For example, the fixing member 131 may be a screw or another fixing member 131 for connecting the blower 10 and the handheld 20. The present invention is not limited to this embodiment.

[0228] 13-6, the outer walls of the first inner case 101 and the second inner case 102 are provided with small connecting grooves in the axial direction, and the inner wall of the outer case 103 is provided with connecting protrusions 1031 corresponding to the connecting grooves. The connecting grooves and the connecting protrusions 1031 are fitted together to guide the circumferential contact between the first inner case 101 and the second inner case 102 and the outer case 103, and prevent relative rotation between the outer case 103 and the first inner case 101 and the second inner case 102, thereby improving the connection stability between the first inner case 101, the second inner case 102 and the outer case 103.

[0229] Specifically, the blower unit 10 further includes an intake cover 104 covering the second inner case 102. The intake cover 104 has an annular protrusion extending outward, the protrusion being higher than the center of the intake cover 104, and a gap between the intake cover 104 and the fan impeller 112. Providing a gap between the intake cover 104 and the fan impeller 112 improves the airflow guidance effect. In this embodiment, the intake cover 104 has gaps between connecting ribs scattered along its edge in the central axis direction, forming the opening structure. The connecting ribs have an arc-shaped structure, and the opening direction of the arc-shaped structure faces the fan impeller 112. The intake cover with the arc-shaped connecting ribs effectively reduces the resistance encountered during intake, improving the intake effect of the intake cover and enhancing the user experience. In another embodiment, the intake cover 104 has a number of circular, rectangular, or other shaped hole structures.

[0230] Furthermore, a display 122 is mounted within the receiving cavity 123, and the exhaust port 121 is mounted around the outside of the display 122. During use, the display 122 is used to display the remaining battery power, the current wind speed, and the battery charge.

[0231] Specifically, the first inner case 101 has a trapezoidal structure, and trapezoidal cavities are provided at intervals in an annular pattern on the outer inclined surface of the first inner case 101. The provision of the trapezoidal cavities reduces the vibration sensation in the outer case 103 when the motor 115 rotates the fan impeller 112, improving the user experience.

[0232] The hand-held unit 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 122, and in use, the battery 202 may supply power to the motor 115 to rotate the fan impeller 112, or may supply power to the display 122 to display the remaining battery charge, the current wind speed, and the battery charge on the display 122.

[0233] Example 14 refers to those shown in Figures 14-1 to 14-7.

[0234] As shown in Figures 14-1 to 14-7, in order to solve the problem that when a hand-held fan is used, vibrations are generated due to the shaking caused by the rotation of the impeller, and the vibrations of the impeller are transmitted to the case, causing noise, an embodiment of the present invention provides a hand-held fan. Referring to Figure 14-1, there is shown a schematic diagram of a hand-held fan according to an embodiment of the present invention, which includes a blower unit 10 and a handle unit 20. Referring to Figure 14-2, there is shown an exploded schematic diagram of a hand-held fan according to an embodiment of the present invention, which includes an outer case 11 and an inner case 12 that are removably assembled. A first storage cavity 111 suitable for accommodating the inner case 12 is provided in the outer case 11, and a second storage cavity 121 suitable for mounting a blower assembly 30 is provided in the inner case 12, and a vibration-damping structure 40 is provided between the outer case 11 and the inner case 12.

[0235] Specifically, the outer case 11 and the inner case 12 are removably assembled, the inner case 12 is provided in a first storage cavity 111 within the outer case 11, and the blower assembly 30 is provided in a second storage cavity 121 of the inner case 12. When the handheld fan is in use, the rotation of the blower assembly 30 generates vibrations in the inner case 11. The vibration control structure 40 provided between the outer case 11 and the inner case 12 effectively reduces the vibrations transmitted from the inner case 12 to the outer case 11 when the blower assembly 30 rotates, thereby reducing the noise generated when the handheld fan is in use.

[0236] Furthermore, the vibration-damping structure 40 is engaged with the inside of the outer case 11, and is arranged along the outer periphery 122 of the circumferential seat of the inner case 12. In an embodiment of the present invention, the outer case 11 is detachably connected to the inner case 12, and the vibration-damping structure 40 is engaged with the inside of the outer case 11, and the vibration-damping structure 40 and the inside of the outer case 11 can abut against each other, thereby canceling out the vibrations generated in the inner case 11. Furthermore, the vibration-damping structure 40 is engaged with the inside of the outer case 11 and can be easily removed, which makes it convenient to clean the outer case 11, the inner case 12, the intake cover 50, and other components in a timely manner.

[0237] Furthermore, since the vibration-damping structure 40 and the inner case 12 are molded as a single unit, not only can the vibration transmitted from the inner case 12 to the outer case 11 when the blower assembly 30 rotates be effectively reduced, but also, since the vibration-damping structure 40 and the inner case 12 are molded as a single unit, the structure of the handheld fan becomes simpler and more compact, the overall assembly process of the handheld fan is simplified, and the production efficiency of the handheld fan is effectively improved.

[0238] Furthermore, referring to Figure 14-3, which is a schematic diagram of the blower unit according to an embodiment of the present invention, the vibration control structure 40 is at least two trapezoidal protrusions, which are installed at equal intervals, and the number of trapezoidal protrusions is at least two, specifically, which are installed correspondingly according to the diameters of the outer case 11 and the inner case 12, whereby the embodiment of the present invention is not further limited.

[0239] Specifically, in this embodiment of the present invention, the vibration-damping structure 40 is installed as a trapezoidal protrusion, with the wider cross-section side of the trapezoidal protrusion facing the outer case 11 and the narrower cross-section side of the trapezoidal protrusion facing the inner case 12. The installed trapezoidal protrusions can abut against the inside of the outer case 11, thereby effectively buffering vibrations transmitted from the inner case 12 to the outer case 11 when the blower assembly 30 rotates, thereby achieving a vibration-damping effect.

[0240] Furthermore, the trapezoidal protrusion is hollow and has a through hole 41 at one end thereof that engages with the outer case 11 to allow for good ventilation, and in this embodiment of the present invention, the trapezoidal protrusion is hollow, which reduces the weight of the trapezoidal protrusion, making the handheld fan lighter, and also leaves space for elastic deformation when the outer case 11 and the inner case 12 rotate relative to each other, improving the stability of the connection between the outer case 11 and the inner case 12. In this embodiment of the present invention, the trapezoidal protrusion is hollow at one end thereof that engages with the outer case 11, so that the trapezoidal protrusion damps vibration and does not block the through hole 41.

[0241] Further, referring to Figure 14-4, which is a cross-sectional view of a handheld fan according to an embodiment of the present invention, the blower unit 10 further includes an intake cover 50 engaged with the inner case 12, and the intake cover 50 includes an intake plate 501 and a fixing ring 502 engaged with the outer periphery of the intake plate 501, and an air passage located within the second accommodating space 121 is formed between the intake plate 501 and the blower assembly 30.

[0242] Specifically, the air blower assembly 30 is located in the second storage cavity 121, and when the air blower assembly is operating, the air from the air intake plate 501 can be guided out of the second storage cavity 121, thereby forming an air path, making the air blowing from the handheld fan more uniform and improving the air blowing efficiency of the handheld fan.

[0243] Further, referring to Figure 14-5, it is a schematic diagram of a blower assembly according to an embodiment of the present invention, the blower assembly 30 includes a drive motor 31 and an impeller assembly 32, the impeller assembly 32 includes a conical chamber 321 and blades 322 wound around the outside of the conical chamber 321, a motor bearing 311 is provided within the conical chamber 321, and the motor bearing 311 is fitted onto the outside of the drive motor 31, the installation of the motor bearing 311 ensures the stability of the drive motor 31 when rotating at high speed, and further ensures the operating stability of the entire handheld fan.

[0244] Specifically, in an embodiment of the present invention, when a user uses the handheld fan, the blades 322 rotate by being driven by the drive motor 31, and guide the air from the intake cover 50 into the air duct space in the second storage cavity 121 and blow it out from the exhaust port side.The user can then hold the handheld fan and blow the air toward the area where the temperature needs to be lowered, thereby quickly lowering the temperature and achieving the purpose of improving human comfort.

[0245] Furthermore, the maximum outer diameter of the impeller assembly 32 is smaller than the maximum outer diameter of the intake cover 50. By installing it in this manner, most of the impeller assembly 32 is shielded, which not only improves aesthetics but also prevents hands or hair from getting caught, improving the user experience. The maximum outer diameter of the outer case 11 is equal to the maximum outer diameter of the intake cover 50, which allows the intake cover 50 and the outer case 11 to be matched in size and installed stably.

[0246] Furthermore, referring to Figure 14-6, it is a schematic diagram of an impeller assembly according to an embodiment of the present invention, in which the blades 322 are diagonal, and a diagonal air passage 323 is formed between two adjacent blades 322, and the diagonal air passage 323 is for guiding the wind from the intake cover 50 into the air passage space, and it is preferable that the blades 322 of the handheld fan are diagonal, which increases the air volume of the handheld fan, reduces noise, makes the structure more compact, and is convenient to hold and carry.

[0247] Further, referring to Figure 14-7, Figure 14-7 is a connection diagram between the blowing unit and the handheld unit according to an embodiment of the present invention, in which a first connecting member 21 is provided on the handheld unit 20, a second connecting member 13 is provided on the blowing unit 10, the handheld unit 20 and the blowing unit 10 are connected via a fixing member 22, and the fixing member 22 penetrates the first connecting member 21 and the second connecting member 13 to fix the handheld unit 20 and the blowing unit 10, and for example, the fixing member 22 may be a screw or another fixing member 22 for connecting the blowing unit 10 and the handheld unit 20, and here, the embodiment of the present invention is not further limited.

[0248] The present invention provides a handheld fan, the handheld fan comprising a blower unit and a handle, the blower unit comprising a removably assembled outer case and inner case, the outer case having a first housing cavity suitable for housing the inner case, the inner case having a second housing cavity suitable for mounting a blower assembly, and a vibration-damping structure between the outer case and the inner case. By adding the vibration-damping structure between the outer case and the inner case, the handheld fan of the present invention effectively reduces noise generated by impeller vibrations transmitted to the outer case during use, improving overall user comfort and providing a better user experience.

[0249] Example 15 refers to those shown in Figures 15-1 to 15-6.

[0250] Referring to Figs. 15-1 to 15-6, the present invention provides a handheld fan, which solves the problems of good airflow effect and high temperature reduction efficiency on the premise that the volume of the handheld fan is small.

[0251] Specifically, referring to Figure 15-1, this is an oblique view of a handheld fan according to an embodiment of the present invention, and the handheld fan includes a blower unit 10 and a hand-held unit 20. Referring to Figures 15-2 to 15-3, the blower unit 10 includes a first inner case 101 and a second inner case 102 that engages with the first inner case 101, the first inner case 101 being adjacent to the intake side and the second inner case 102 being adjacent to the exhaust side, a fan base 111 being provided within the second inner case 102, a fan impeller 112 being provided on the side of the fan base 111 facing the first inner case 101, the fan impeller 112 being located inside the first inner case 101, and the end of the first inner case 101 adjacent to the intake side protruding from the end of the fan impeller 112 adjacent to the intake side. The fan impeller 112 is installed inside the first inner case 101, and the end of the first inner case 101 closest to the intake side protrudes from the end of the fan impeller 112 closest to the intake side, so that an intake passage exists between the fan impeller 112 and the intake side, improving the air guidance effect. By installing the fan impeller 112 inside the first inner case 101, the airflow enters from the intake side, flows along the fan impeller 112, and then concentrates and flows out on the exhaust side, improving the exhaust effect of the handheld fan.

[0252] Furthermore, the first inner case 101 has a trapezoidal structure, and trapezoidal cavities 1011 are provided at intervals in an annular pattern on the outer inclined surface of the first inner case 101, protrusion structures 1010 are provided at intervals on the side of the first inner case 101 facing the second inner case 102, and recessed structures 1020 are provided in the second inner case 102 corresponding to the protrusion structures. By providing the trapezoidal cavities 1011, the overall vibration sensation of the blower unit 10 when the fan impeller 112 rotates is reduced, improving the user experience. The first inner case 101 has uniformly formed protrusion structures 1010 on the outer wall edge facing the second inner case 102, and the second inner case 102 has formed recessed structures 1020 corresponding to the protrusion structures 1010 on the outer wall facing the first inner case 101, by using a structural installation method that allows the protrusion structures 1010 and the recessed structures 1020 to be tightly engaged with each other, thereby realizing tight engagement between the first inner case 101 and the second inner case 102 and ensuring convenient installation and removal between the first inner case 101 and the second inner case 102. Furthermore, the installation method of engaging the first inner case 101 and the second inner case 102 by providing the protrusion structures 1010 and the recessed structures 1020 makes it easy to install and remove the first inner case 101 during later inspection, facilitating inspection.

[0253] Specifically, the blower 10 further includes an outer case 103 fitted onto the first inner case 101 and the second inner case 102. A plurality of connecting grooves are formed in the outer walls of the first inner case 101 and the second inner case 102 in the axial direction, and connecting protrusions are formed on the inner wall of the outer case 103 in correspondence with the connecting grooves. The connecting grooves and the connecting protrusions engage with each other to guide the outer contact between the first inner case 101 and the second inner case 102 and the outer case 103, and prevent relative rotation between the outer case 103 and the first inner case 101 and the second inner case 102, thereby improving the connection stability between the first inner case 101, the second inner case 102, and the outer case 103.

[0254] Furthermore, the fan impeller 112 is provided with a conical chamber, a bearing 113 is provided within the conical chamber, a motor shaft 114 is inserted within the bearing 113, and the motor shaft 114 is connected to a motor 115. The bearing 113 is provided around the outside of the motor shaft 114, and 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 and further ensures the operation stability of the entire handheld fan.

[0255] Specifically, the blower unit 10 further includes an intake cover 104 covering the second inner case 102. The intake cover 104 has an annular protrusion extending outward, the protrusion being higher than the center of the intake cover 104, and a gap between the intake cover 104 and the fan impeller 112. Providing a gap between the intake cover 104 and the fan impeller 112 improves the airflow guidance effect. In this embodiment, the intake cover 104 has gaps between connecting ribs scattered along its edge in the central axis direction, forming the opening structure. The connecting ribs have an arc-shaped structure, and the opening direction of the arc-shaped structure faces the fan impeller 112. The intake cover with the arc-shaped connecting ribs effectively reduces the resistance encountered during intake, improving the intake effect of the intake cover and enhancing the user experience. In another embodiment, the intake cover 104 has a number of circular, rectangular, or other shaped hole structures.

[0256] Furthermore, an exhaust part 121 is installed on the outside of the first inner case 101, an accommodating cavity 123 is installed on the rear side of the fan base 111, a display 122 is installed in the accommodating cavity, and the exhaust part 121 is installed around the outside of the display 122, and the display 122 is used to display the stage and power level.

[0257] Specifically, a connecting plate 1230 is spaced apart from the outer wall of the receiving cavity 123, and the connecting plate 1230 is connected to the inner wall of the second inner case 102. The installation of the connecting plate 1230 between the outer wall of the receiving cavity 123 and the inner wall of the second inner case 102 enhances the stability between the second inner case 102 and the receiving cavity 123, reduces the vibration caused by the operation of the motor 115 connected to the fan base 111, ensures the stability between the receiving cavity 123 and the second inner case 102, and improves the stability of the fan base 111 when the handheld fan is in operation.

[0258] 15-4, the handle 20 is provided with a first connecting member 203, and the blower 10 is provided with a second connecting member 105. The blower 10 and the handheld 20 are connected via a fixing member 131, which passes through the first connecting member 203 and the second connecting member 105 to connect the blower 10 and the handheld 20. The handheld 20 is fitted into the blower 10. The first connecting member 203 and the second connecting member 105 are fixedly connected by the fixing member 131, ensuring the overall strength and stability of the handheld fan during use. For example, the fixing member 131 may be a screw or another fixing member 131 for connecting the blower 10 and the handheld 20. The present invention is not limited to this embodiment.

[0259] Specifically, as shown in FIG. 15-5, a first circuit board 116 is attached to the rear side of the fan base 111, a first wiring passage 117 is provided in the radial direction of the fan base 111, and electrical wires are drawn from the first circuit board 116 to a second circuit board 204, which is provided within the handle. The second circuit board 204 is installed in the handle 20, facilitating wiring. The provision of the first wiring passage 117 prevents electrical wires from bending when connecting the first circuit board 116 and the second circuit board 204, thereby extending their service life. The electrical wires bypass the outside of the fan impeller 112 before connecting to the second circuit board 204, preventing them from coming into contact with the fan impeller 112, resulting in short circuits and poor contact. During assembly, the central conductor is placed in the first wiring passage 117, which allows for efficient use of space, and by limiting the internal space, space is secured and the conductor is prevented from being crushed during assembly.

[0260] 15-6, the hand-held portion 20 further includes a bracket 201 and a battery 202 provided in the bracket 201. The battery 202 is electrically connected to the motor 115 and the display 122, and in use, the battery 202 may supply power to the motor 115 to rotate and operate the fan impeller 112, or may supply power to the display 122 to display the remaining battery power, the current wind speed, and the battery charge on the display 122.

[0261] Example 16 refers to those shown in Figures 16-1 to 16-7.

[0262] As shown in Figure 16-1 of the specification, the motor drive control circuit of the portable fan includes a battery power supply, a regulator unit 100, a main control unit 200, a motor drive control unit 300, a motor drive circuit 400, a motor 500, a rotor position detection circuit 600, a USB access circuit 700, an ADC (Analog-to-Digital Converter) analog-to-digital converter power supply circuit 800, and a display unit 900.

[0263] Portable fans include handheld fans, neck fans, wearable fans, seat fans, neck fans, head-mounted fans, table fans, car fans, and the like.

[0264] As shown in Figure 16-2 of the specification, the regulator unit 100 includes a regulator chip U1, a power supply voltage VBAT is connected to the IN input pin of the regulator chip U1 via a current-limiting resistor R1, one end of a filter capacitor C1 is connected to the IN input pin 1 of the regulator chip U1 and the other end is grounded, the OUT output pin of the regulator chip U1 outputs the VDD operating voltage and supplies power to the main control chip U2 and the motor driving chip U3, the OUT output pin of the regulator chip U1 is grounded via a capacitor C2 to filter the current, and the GND pin of the regulator chip U1 is grounded.

[0265] The regulator unit 100 is used to stabilize the power supply voltage and ensure a constant voltage output under different load conditions, and can automatically adjust the current according to changes in the power supply voltage to keep the output voltage constant. The regulator unit 100 stabilizes the voltage source, which varies greatly, and prevents the circuit from being affected by external environmental factors (e.g., temperature, humidity, etc.).

[0266] As shown in FIG. 16-3 of the specification, in one embodiment, a motor drive control unit 300, a motor drive circuit 400, and a rotor position detection circuit 600 cooperate to drive the operation of a motor 500.

[0267] The permanent magnet is provided on the rotor of the motor 500, and three windings U2, V2, and W2 are provided on the stator of the motor 500 in a Y-connection.

[0268] 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 each of the U2, V2 and W2 phase windings of the motor 500 in accordance with the control signal.

[0269] 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 of which is grounded to filter the current and stabilize the voltage.

[0270] In one embodiment, the motor drive circuit 400 includes a MOS transistor switch Q1 having one end connected to the power supply voltage VBAT and the other end connected to the winding U2, the conduction of which is controlled by a MOS transistor switch Q4, one end of which is connected to the power supply voltage VBAT via a voltage-dividing current-limiting resistor R5 and the other end connected to ground, a motor drive control unit 300 outputting a PWM_AH signal to the drain of the MOS transistor switch Q4 to control the conduction of the MOS transistor switch Q4, a MOS transistor switch Q7 having one end connected to the winding U2 and the other end grounded via a resistor R11, and the motor drive control unit 300 outputting a PWM_AL signal to the drain of the MOS transistor switch Q7 to control the conduction of the MOS transistor switch Q7. Reverse diodes are provided in the MOS transistor switches Q1, Q4, and Q7 to reversely breakdown before an overvoltage destroys the MOS transistors, thereby preventing the MOS transistors from burning out.

[0271] Preferably, the MOS transistor switch Q1 is a P-type MOS transistor, and the MOS transistor switches Q4 and Q7 are N-type MOS transistors. A resistor R2 is connected to the drain and source of the MOS transistor switch Q4, and a resistor R8 is connected to the drain and source of the MOS transistor switch Q7, which can provide a bias voltage to the field effect transistors and discharge static electricity between the gate and source of the MOS transistors to protect the MOS transistors.

[0272] The current control principle for winding U2 is as follows.

[0273] For current to flow into winding U2, motor drive control unit 300 outputs a low-level PWM_AL signal to the drain of MOS transistor switch Q7, MOS transistor switch Q7 is in the off state, motor drive control unit 300 outputs a low-level PWM_AL signal to the drain of MOS transistor switch Q4, MOS transistor switch Q4 is turned on, power supply voltage VBAT is grounded via voltage-dividing current-limiting resistor R5, the drain of MOS transistor switch Q1 is grounded and a low level is input, MOS transistor switch Q1 is turned on, and current flows into winding U2.

[0274] For current to flow out of winding U2, the motor drive control unit 300 outputs a PWM_AH low-level signal to the drain of the MOS transistor switch Q4, the MOS transistor switch Q4 is in an off state, the drain of the MOS transistor switch Q1 is connected to a high level, the MOS transistor switch Q1 is turned off, the motor drive control unit 300 outputs a PWM_AL signal to the drain of the MOS transistor switch Q7, the MOS transistor switch Q7 is turned on, and current is flowed out of winding U2.

[0275] In one embodiment, a MOS transistor switch circuit consisting of MOS transistor switches Q2, Q5, Q8 and resistors R6, R3, R9 controls the current flowing in and out of winding V2, and its circuit structure and control principle are similar to those of the current control circuit for winding U2. A MOS transistor switch circuit consisting of MOS transistor switches Q3, Q6, Q9 and resistors R7, R4, R10 controls the current flowing in and out of winding W2, and its circuit structure and control principle are similar to those of the current control circuit for winding U2.

[0276] In one embodiment, the motor overcurrent protection circuit includes: a current sampling resistor R11 monitoring the current flowing from the motor 500; a voltage across the resistor R11 being output to the ISENSE_IN overcurrent protection detection pin of the motor drive control unit 300 via a current limiting resistor R12; the motor drive control unit 300 converting the input voltage signal into a corresponding digital signal to obtain a quantized current value of the motor 500; one end of a capacitor C6 being connected to the ISENSE_IN overcurrent protection detection pin of the motor drive control unit 300 and the other end being grounded to filter the current and stabilize the voltage; and after the current value of the motor 500 exceeds the maximum operating current, the motor drive control unit 300 adjusting 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.

[0277] As shown in Figure 16-4 of the specification, 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 via a resistor R19, and the winding U2 is connected to the BEMF_U pin of the motor drive control unit 300 via a resistor R14 and the other end of the resistor R14 is grounded via a resistor R19.

[0278] The BEMF back-EMF output circuit consisting of resistors R15, R16, and R20 outputs a BEMF back-EMF voltage signal of winding V2, and its circuit structure and control principle are similar to those of the BEMF back-EMF output circuit of winding U2. The BEMF back-EMF output circuit consisting of resistors R17, R18, and R21 outputs a BEMF back-EMF voltage signal of winding W2, and its circuit structure and control principle are similar to those of the BEMF back-EMF output circuit of winding U2.

[0279] The motor drive control unit 300 monitors the line voltages of the windings U2, V2, and W2 based on signals input via the BEMF_U, BEMF_V, and BEMF_W pins, calculates the back electromotive force of the rotor of the motor 500, and further calculates the rotor position of the motor 500.

[0280] The principle of drive control of the motor 500 is as follows.

[0281] The main control unit 200 outputs a motor start signal to the input terminal of the motor drive control unit 300, which then outputs a motor drive signal to the gate of the MOS transistor in the motor drive circuit 400. The motor drive control unit 300 obtains the current position of the rotor of the motor 500 using the back electromotive force and controls the phase relationship of the outputs of each phase, energizing the corresponding two-phase winding each time. The energization time of each phase winding is 120 electrical degrees, which is opposite to the direction of the stator flux linkage and forms a certain angle with the direction of the rotor flux linkage, driving the rotor of the motor 500 to rotate.

[0282] As shown in Figure 16-5 of the specification, in one embodiment, the motor drive control unit 300 includes a motor drive chip U3, whose VDD power supply pin 12 is connected to the VDD operating voltage, whose 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, whose GND pin 5 is grounded, whose PWM pin 11 receives the motor running pulse modulation signal PWM, whose pins 1-3, 14-16 output motor drive signals to the gates of the MOS transistors of the motor drive circuit 400, whose pins 6-8 receive the back-EMF signals BEMF_U, BEMF_V, and BEMF_W, whose FG pin 13 outputs motor speed information, and whose ISENSE_IN pin 9 receives an overcurrent protection signal.

[0283] As shown in Figures 16-6 to 16-7 of the specification, in one embodiment, the USB access circuit 700 includes: a USB voltage VBUS outputs a USBDET signal through a current-limiting resistor R22; and a diode D2 has a positive electrode grounded and a negative electrode connected to the USB voltage VBUS through the resistor R22, thereby realizing overvoltage protection of the main control unit.

[0284] In one embodiment, the battery voltage detection analog-to-digital conversion circuit 800 includes a battery voltage VBAT connected to ground via resistors R23 and R24, a capacitor C8 connected in parallel to the resistor R24, and one end of the resistor R24 ​​outputting an analog-to-digital conversion voltage signal V_ADC.

[0285] In one embodiment, the motor drive control circuit of the portable fan is provided with a switching interface P2, which transmits the P_EN enable signal of the dial switch and the modulation signals KEY, KEY_X, and KEY_Y to the main control unit 200 of the portable fan, and supplies power from VDD to the mode switching roller via current limiting resistors R25 and R26.

[0286] In one embodiment, the display unit 900 includes an SMG switch interface and a digital display. The SMG switch interface pins 1-5 are connected to the main control unit 200 via current-limiting resistors R25-R29 to receive and transmit display control signals to the digital display. The digital display displays the air temperature of the portable fan and the percentage of the fan's electricity according to the display control signals.

[0287] In one embodiment, the main control unit 200 includes a control chip U4, whose VDD power supply pin 1 is connected to the VDD operating voltage, whose VDD power supply pin 1 is grounded via a regulator capacitor C9, and whose VSS pin 16 is grounded. Pins 4, 6, and 7 of the control chip U4 receive modulation signals KEY, KEY_X, and KEY_Y to send fan operation status commands. Pin 5 of the control chip U4 outputs a motor operation pulse modulation signal PWM to the motor driver chip U3. Pin 8 of the control chip U4 receives a USBDET signal to determine the power supply status. Pin 9 of the control chip U4 receives an analog-to-digital conversion voltage signal V_ADC. Pins 2, 12-15 of the control chip U4 are connected to the display unit 900 to output display control signals.

[0288] Example 17 refers to those shown in Figures 17-1 to 17-5.

[0289] As shown in Figure 17-1 of the specification, the battery boost charging circuit of the portable fan includes a USB interface, a boost module, a boost charging management module, a charging voltage preset module, a charging status indication module, and an over-temperature protection module.

[0290] Portable fans include handheld fans, neck fans, seat fans, neck fans, head-mounted fans, table fans, car fans, and the like.

[0291] The USB interface includes an interface J1, and the boost charging management module includes a charging chip U1.

[0292] As shown in Figure 17-2 of the specification, in one embodiment, the boost charging management module features a power MOS transistor and a Boost synchronous boost circuit integrated into the charging chip U1.

[0293] The boost module circuit has one end of inductor L1 connected to the USB voltage VBUS and the other end connected to the LX external inductor pin 8 of the charging chip U1. Pin 7 of the charging chip U1's BST bootstrap capacitor is connected to pin 8 via bootstrap capacitor C2, which increases the DC bias voltage of the amplifier circuit and strengthens the output signal amplitude. Pin 8 of the charging chip U1's LX external inductor is connected to ground via resistor R1 and capacitor C1, which are connected in series to form an RC circuit for filtering high-frequency signals. One end of current-limiting resistor R2 is connected to the USB voltage VBUS and the other end is connected to VIN power input pin 6 of the charging chip U1 to introduce the input voltage. VIN power input pin 6 of the charging chip U1 is grounded via capacitor C4 to filter the current. One end of regulator capacitor C5 is connected to the USB voltage VBUS and the other end is grounded. The boost charging circuit boosts and charges the BAT battery via the boost module.

[0294] The battery boost charging circuit of a portable fan is equipped with a regulator filter circuit, and the boost output VOUT of the charging chip U1 is boosted and output to pin 2, outputting the charging voltage to charge the BAT battery. Filter capacitors C3 and C6 are connected in parallel and then connected together to the VBAT voltage with the other end grounded. A diode D1 is installed in the boost module NC (normally closed), and the positive pole of the diode D1 is grounded and the negative pole is connected to VBAT.

[0295] The capacitors C7, C8, and C9 are connected in parallel, with one end connected to the VSYS boost output intermediate node pin 1 of the charging chip U1 and the other end connected to ground. The regulator filter circuit filters the current and stabilizes the voltage at the charging output terminal.

[0296] Pin 0 of charging tip U1 is grounded.

[0297] The working principle of the boost module is as follows.

[0298] The MOS transistor connected to inductor L1 in the charging chip U1 is turned on, and then the inductor L1 is grounded. As the current in inductor L1 increases, the inductor L1 begins to store energy. When the MOS transistor connected to 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 superimposed in series to create a boost effect, and the BAT battery is charged by the Boost synchronous boost circuit. The MOS transistor in the charging chip U1 is controlled by its internal logic. When the charging chip U1 is not operating, the MOS transistor will turn off the chip output to prevent leakage current.

[0299] As shown in Figure 17-3 of the specification, in one embodiment, the charging voltage preset module is provided with a resistor R3, one end of which is connected to the VSET voltage setting pin 4 of the charging chip U1 and the other end is grounded, and the charging chip U1 determines the charging voltage to be output based on the detected electrical signal of R4. The battery boost charging circuit sets the charging voltage using the charging voltage preset module.

[0300] In one embodiment, the over-temperature protection module has one end of thermistor R4 connected to NTC thermistor pin 3 of the charging chip U1 and the other end grounded, and the charging chip U1 detects the voltage of thermistor R4 to determine whether the battery temperature is high or low, thereby realizing the over-temperature protection function of the charging module.The battery boost charging circuit uses the over-temperature protection module to realize the over-temperature protection function of the circuit.

[0301] In one embodiment, the charging status indicator module includes a resistor R5, one end of which is connected to the LED charging indicator pin 5 of the charging chip U1 and the other end of which is grounded, and the LED charging indicator pin 5 of the charging chip U1 outputs the charging status signal PG. The battery boost charging circuit outputs and displays the charging status through the charging status indicator module.

[0302] As shown in Figure 17-4 of the specification, in one embodiment, the battery boost charging circuit is equipped with a charging communication module, in which pin 2 of interface J1 is connected to pin 5 to output the USB voltage VBUS of the boost charging circuit, and the first pin 3 of the CC1 path of interface J1 and the second pin 4 of the CC2 path of interface J1 are connected to pull-down resistors R6 and R7, respectively, with the other ends of resistors R6 and R7 both grounded to detect the voltage values ​​of CC1 and CC2 to realize functions such as identifying cable connection / disconnection and socket / plug orientation, and pins 1, 6, 7, and 8 of interface J1 are all grounded. The battery boost charging circuit recognizes the USB voltage through the charging communication module.

[0303] Capacitors C10 and C11 have one end connected to the USB voltage VBUS and the other end connected to ground to filter the current, stabilize the voltage, and prevent voltage spikes. The USB voltage VBUS is also connected to ground via discharge resistor R8 to prevent unnecessary power consumption.

[0304] As shown in Figure 17-5 of the specification, in one embodiment, the battery boost charging circuit further includes circuit transfer interfaces BD, P1, P2 for transferring circuit signals of the portable fan.

[0305] The interface BD is connected to the dial switch, receives the P_EN enable signal of the dial switch, and transmits it to the main control chip of the portable fan via the interface P2 to control the locking or running of the portable fan.

[0306] The interface P1 receives the modulation signals KEY, KEY_X, 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 / stop and step adjustment of the portable fan.

[0307] The interface P2 also receives the VBAT battery voltage, the USB voltage VBUS, and the PG signal transmitted from the charging chip U1, and transmits them to the main control chip of the portable fan.

[0308] Example 18 refers to those shown in Figures 18-1 to 18-3.

[0309] As shown in Figures 18-1 to 18-3 of the specification, the charging management circuit of a portable fan includes at least one of a rapid charging management unit 300 and a charging management unit 400, where the rapid charging management unit 300 includes a rapid charging communication module, a rapid charging control signal output module, a rapid charging voltage setting module, and a rapid charging current setting module, and the charging management unit 400 includes a charging communication module, a charging drive module, a charging current detection module, an end voltage setting module, a charging status output module, and an over-temperature protection module. The charging management circuit of the portable fan, which includes the rapid charging management unit and the charging management unit, can switch between a rapid charging mode and a normal boost charging mode.

[0310] Portable fans include handheld fans, neck fans, table fans, seat fans, neck fans, and head-mounted fans.

[0311] The charging management circuit further 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, wherein the charging adapter 100 is connected to the USB input unit 210, the USB output unit 220 is connected to the rapid charging management unit 300 and the charging management unit 400, which are connected to the control unit 500, the rapid charging management unit 300 and the charging management unit 400 are connected to the control unit 500, the rapid charging control signal output module of the rapid charging management unit 300 is connected to the controlled end of the switch circuit, the charging management unit 400 is connected to the battery pack 600, the rapid charging management unit 300 and the control unit 500 are connected to the battery pack 600 via the charging management unit 400, and the charging display unit 700 is connected to the control unit 500.

[0312] The portable fan is connected to supply power to the battery pack 600 via a charging adapter 100, a USB input unit 210, a USB output unit 220, a quick charging management unit 300, a charging management unit 400, and a control unit 500, and the quick charging management unit 300 and the charging management unit 400 communicate with the charging adapter 100 via a USB interface.

[0313] The USB output unit 220 includes a USB interface J1, the fast charging management unit 300 includes a power acquisition protocol chip (USB PD Sink) U2, and the charging management unit 400 includes a charging chip U1.

[0314] Pins A1B12 and A12B1 of USB interface J1 are grounded, and the fast charging management unit 300 and the charging management unit 400 are connected to VBUS pins A4B9 and A9B4 of USB interface J1 to introduce external power. DP data pin A6B6 and DM data pin A7B7 of USB interface J1 are connected to the fast charging management unit 300 and the charging management unit 400 to enable the fast charging management unit 300 and the charging management unit 400 to identify the external power source. DP (data plus, data positive signal) and DM (data minus, data negative signal) are USB data signal lines.

[0315] In one embodiment, the power harvesting protocol chip U2 is communicatively connected to the USB interface J1 through a data signal line and a connection path of a fast charging communication module, which includes: a DP' data pin 2 of the power harvesting protocol chip U2 connected to a DP data pin A6-B6 of the USB interface J1 through a current-limiting resistor R1; a DM' data pin 3 of the power harvesting protocol chip U2 connected to a DM data pin A7-B7 of the USB interface J1 through a current-limiting resistor R2; a CC1 connection path first pin 4 and a CC2 connection path second pin 5 of the power harvesting protocol chip U2 connected to a CC1 connection path first pin A5 and a CC2 connection path second pin B5 of the USB interface J1, respectively; and a CC1 connection path first pin 4 and a CC2 connection path second pin 5 of the power harvesting protocol chip U2 connected to ground via capacitors C1 and C2, respectively, for filtering current and stabilizing voltage. The fast charging communication module of the power acquisition protocol chip U2 is connected to the charging adapter 100 via a USB cable, establishes 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), and applies for, identifies, and monitors the voltage required to charge the portable fan battery pack 600.

[0316] In one embodiment, the fast charging control signal output module includes a power acquisition protocol chip U2 that establishes fast charging communication with the charging adapter 100 through the configuration path pins (pins 4 and 5) and outputs a fast charging drive signal through the fast charging drive pin 10.

[0317] In one embodiment, the VIN chip power supply pin 1 of the power harvesting protocol chip U2 is connected to VBUS through a current limiting resistor R3, and the VIN chip power supply pin 1 of the power harvesting protocol chip U2 is connected to ground through a regulator capacitor C3.

[0318] The fast charge voltage setting module includes: setting the charging voltage for the battery pack 600 in fast charge mode by grounding the VSET voltage setting pin 8 of the power acquisition protocol chip U2 through a resistor R4, and the power acquisition protocol chip U2 acquiring the voltage signal of the resistor R4; and changing the fast charge voltage of the battery pack 600 by changing the resistance value of R4.

[0319] The fast charge current setting module includes: setting the charging current for the battery pack 600 in fast charge mode by grounding the ISET current setting pin 9 of the power acquisition protocol chip U2 through a resistor R5, and the power acquisition protocol chip U2 acquiring the voltage signal of the resistor R5; and changing the fast charge current of the battery pack 600 by changing the resistance value of R5.

[0320] The operating principle of the fast charging mode is as follows.

[0321] The power acquisition protocol chip U2 establishes PD fast-charging communication with the charging adapter 100 via the first pin 4 of the CC1 path and the second pin 5 of the CC2 path, sets the fast-charging voltage via the monitored signal of the VSET voltage setting pin 8, sets the fast-charging current via the monitored signal of the ISET current setting pin 9, outputs a fast-charging drive signal via the GATE pin 10, and the charging head outputs a high voltage to fast-charge the battery pack 600. The power acquisition protocol chip U2 also connects to the I2C bus and the portable fan control unit 500 via the SDA (Serial Data Line) pin 6 and the SCL (Serial Clock Line) pin 7 to communicate and transmit the fast-charging status.

[0322] The VBUS charging input pin 1 of the charging chip U1 is connected to VBUS, and the regulator capacitor C4 has one end connected to the VBUS charging input pin 1 of the charging chip U1 and the other end grounded. It is used to filter the current and ensure stable power supply.

[0323] In one embodiment, the charging communication module includes a DPC data positive signal pin 5 of the charging chip U1 connected to a USB data positive signal through a current-limiting resistor R6, and a DMC data negative signal pin 6 connected to a USB data negative signal through a current-limiting resistor R7. The charging communication module is used by the charging chip U1 to identify the external power status.

[0324] In one embodiment, the charging driving module includes: a first inductor pin 12 (SW1) and a second inductor pin 13 (SW2) of the charging chip U1 are connected to both ends of a transformer storage inductor L1; a first bootstrap capacitor pin 11 (BT1) and a second bootstrap capacitor pin 14 (BT2) of the charging chip U1 are connected to both ends of the transformer storage inductor L1 via capacitors C5 and C6, respectively, where the capacitors C5 and C6 are bootstrap capacitors that provide boost bias voltages for the boost circuit; both ends of the transformer storage inductor L1 are grounded via current-limiting resistors R8 and R9, respectively; and two RC circuits provided in the charging chip U1 are connected in parallel with R8 and R9 and then grounded, respectively, for filtering high-frequency signals.

[0325] The VBAT charging output pin 3 of the charging chip U1 is connected to the battery pack 600, and 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 positive electrode of diode D2 is grounded and the negative electrode is connected to VBAT charging output pin 3 of the charging chip U1. The charging chip U1 charges the battery pack 600 using a charging driver module in a boost charging manner.

[0326] The operating principle of the normal charging mode is as follows.

[0327] The charging adapter 100 is a normal charging adapter. The charging chip U1 communicates with the charging adapter 100 via DPC data positive signal pins 5 and 6 via a handshake to request charging voltage. The charging chip U1 controls the MOS transistor circuit integrated inside to store charging energy in the inductor L1. The charging chip U1 then turns on the MOS transistor circuit to release the energy in the inductor L1. At this time, the inductor L1 and VBUS are connected in series to create a boost effect, and the battery pack 600 is charged via the boost circuit.

[0328] The charging chip U1 has a step-up / 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.

[0329] In one embodiment, the charging current detection module includes: a sampling resistor R10 connected between the CSP current sampling positive pin 20 and the CSN current sampling negative pin 21 of the charging chip U1 to induce charging current; capacitors C12, C13, C14, and C15 connected in parallel with one end connected to the CSP current sampling positive pin 20 of the charging chip U1 and the other end grounded to filter current and stabilize voltage; and a CSO induced current monitoring pin 19 of the charging chip U1 connected to ground via resistor R11, so that the voltage at the CSO induced current monitoring pin 19 of the charging chip U1 is directly proportional to the induced charging current. The charging chip U1 uses the charging current detection module to detect the charging current value of the battery pack 600.

[0330] In one embodiment, in the end voltage setting module, the CSE battery end voltage setting pin 7 of the charging chip U1 is grounded via a resistor R12, and the resistance value of the resistor R12 is used to set the battery end voltage in charging mode.

[0331] In one embodiment, in the over-temperature protection module, the NTC thermistor pin 18 of the charging chip U1 is connected to ground through resistor R14.

[0332] In the charging status output module, the PG charging status pin 8 of the charging chip U1 accesses the power supply voltage VCC through a pull-up resistor R13, and the charging chip U1 outputs a charging status signal through the PG charging status pin 8.

[0333] In the loop compensation module, the COMP loop compensation pin 17 of the charging chip U1 is connected to ground through an RC circuit consisting of resistor R15 and capacitor C17 to enhance the circuit stability and transient response.

[0334] The VCC chip operating voltage output pin 9 of the charging chip U1 outputs the operating voltage, which is connected to ground via the regulator capacitor C16.

[0335] Example 19 refers to those shown in Figures 19-1 to 19-3.

[0336] As shown in Figs. 19-1 to 19-3 of the specification, the portable handheld fan comprises a fan body 100 and a handheld part 200, and an exhaust port 110 and an intake port 120 are provided in the fan body 100.

[0337] The air intake 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 being used primarily to provide a cooling function to the airflow passing through the fan body 100 and being located within the fan body 100, and the spray assembly being used primarily to increase the humidity of the airflow, replenish moisture, and improve the comfort of the airflow and being located in the handheld part 200. The cooling assembly and the spray assembly provide the portable handheld fan with at least one of a cooling function and a spraying function, thereby enhancing the cooling function of the portable handheld fan and improving comfort.

[0338] In one embodiment, the portable handheld fan is provided with a mode switching roller 210 and / or a toggle switch 220, and the mode switching roller 210 and the toggle switch 220 may be provided on the handheld part 200, and the toggle switch 220 is for controlling the "lock" or "standby" state of the portable handheld fan, and when the toggle switch 220 is in the "lock" position, the mode switching roller 210 cannot control the operating state of the portable handheld fan, and when the toggle switch 220 is in the "standby" position, the fan state signal sent from the mode switching roller 210 is used to control the operating state of the portable handheld fan, and the mode switching roller 210 is for controlling the operating states of the portable handheld fan, such as start / stop, temperature reduction state, atomization state, and wind speed adjustment.

[0339] The operation process of the portable handheld fan is as follows:

[0340] The toggle switch 220 is used to control the lock or standby of the portable handheld fan, and 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 operation mode of the portable handheld fan through the mode switching roller 210. In the standby mode, the user presses the mode switching roller 210 to send a "start" operation status signal to the control chip of the portable handheld fan, and the control chip of the portable handheld fan captures the "start" command and controls the operation of the fan motor, and the fan blows air towards the exhaust port, and the portable handheld fan is in the "blowing" mode. In the blowing mode of the portable handheld fan, the user scrolls the mode switching roller 210 up to increase the operating wind speed of the portable handheld fan; in the fan mode of the portable handheld fan, the user scrolls the mode switching roller 210 down to decrease the operating wind speed of the portable handheld fan; in the fan mode of the portable handheld fan, the user presses the mode switching roller 210 again to send a "stop" operating 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.

[0341] The mode switching roller 210 may be used to switch between a strong wind stage, a natural breeze stage, a gentle breeze stage, a cool breeze stage, and a mist stage depending on the usage scenario. When the mode switching roller 210 rotates to the "strong wind stage," the portable handheld fan blows out a high-speed strong wind; when the mode switching roller 210 rotates to the "natural wind stage," the wind speed of the portable handheld fan is that of a natural wind; when the mode switching roller 210 rotates to the "gentle breeze stage," the wind speed of the portable handheld fan is that of a gentle breeze; when the mode switching roller 210 rotates to the "cool breeze stage," the temperature reducing assembly starts to operate, reducing the temperature of the airflow flowing through the fan body 100, and the portable handheld fan The fan blows out cool air, the mode switching roller 210 rotates to the "mist stage", the spray assembly starts to operate, lowering the temperature of the airflow flowing through the fan body 100, increasing the humidity of the airflow, and replenishing moisture, the portable handheld fan blows out air containing mist, and the cool air stage and mist stage of the mode switching roller 210 may be activated separately, or may be activated simultaneously, or may be activated together with the wind speed of any of the strong wind stage, natural wind stage, and gentle breeze stage.

[0342] In one embodiment, the cooling assembly includes a cooling device for reducing the temperature of the surrounding air, and the cooling assembly further includes an air guide tube 400, the air guide tube 400 is provided in the fan body 100, the air guide tube 400 is independently provided in the fan tube 310 of the fan body 100, the air guide tube 400 is also provided inside the fan tube 310 of the fan body 100 and forms an integral structure with the fan tube 310, and the fan tube 310 further carries components of the cooling assembly of the portable hand-held fan. The air guide 400 is used to guide the airflow so that it is blown out evenly, improving the air blowing efficiency, and the spraying assembly includes an air compressor 720, a catheter 730, and an atomizing unit 740, and the air compressor 720 may be an air compressor or an air compression pump, etc., and the air compressor 720 pushes the liquid into the atomizing unit 740 through the catheter 730, which atomizes the liquid, and the portable hand-held fan blows out the liquid mist through the spraying assembly.

[0343] As shown in Figures 19-1 and 19-2 of the specification, in one embodiment, a portable handheld fan has a cooling function, and the cooling device is provided with a temperature conduction network 610, a temperature conduction member 620, and a semiconductor cooling member 630. The temperature conduction network 610 is used to increase the air contact area and improve the temperature reduction effect, the semiconductor cooling member 630 is used to reduce the temperature and generate cold temperature, and the temperature conduction member 620 is used to conduct the temperature of the semiconductor cooling member 630, and the temperature conduction network 610 and the temperature conduction member 620 may be independent devices or may be an integrated device structure.

[0344] In one embodiment, the cooling device is installed inside the air guide tube 400, the semiconductor cooling member 630 is used to reduce the temperature and generate cold temperature, the temperature conduction member 620 is provided with a position limiting hole 640 for mounting the semiconductor cooling member 630, and the temperature conduction mesh 610 is attached to the outside of the temperature conduction member 620 and installed inside the air guide tube 400, and is used to increase the air contact area with the inside of the air guide tube 400 and improve the temperature reduction effect.

[0345] As shown in Figures 19-1 and 19-3 of the specification, in one embodiment, a portable handheld fan has an atomization function, and includes a liquid storage container 710, an air compressor 720, a catheter 730, and an atomization unit 740 in the handheld unit 200. The air compressor 720 may be an air compressor or an air compression pump, and the fan body 100 is provided with an atomization nozzle 750. The liquid storage container 710 is for storing liquid, such as pure water, lotion, or moisturizing water. The air compressor 720 is for pressurizing the liquid and forcing it into the liquid guide 730, which is for transporting the liquid. There are one or more atomization nozzles 750. The atomization unit 740 is for atomizing the liquid, and the atomization nozzle 750 is for spraying the atomized liquid onto the fan body 100.

[0346] In one embodiment, liquid storage box 710 is provided at the bottom of handle 200 and is used to store liquid, such as pure water, lotion, moisturizing water, etc.; air compressor 720 is provided within liquid storage box 710 and is used to pressurize the liquid and force it into liquid guide tube 730; the liquid supply port of liquid guide tube 730 is provided within liquid storage box 710 and transports the liquid to atomization unit 740; atomization unit 740 is provided at the top of handle 200; and one or more atomization nozzles 750 atomize the liquid transported by liquid guide tube 730 and transport the atomized liquid by atomization nozzle 750 into fan body 100.

[0347] As shown in Figures 19-1 and 19-2 of the specification, in one embodiment, a portable handheld fan has a cooling function, and the fan body 100 includes a fan barrel 310, a fan rear cover 320, and blades 500, and the fan barrel 310 is used to mount components of the cooling assembly of the portable handheld fan, and 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 integrated structure.

[0348] In one embodiment, the air guide tube 400 is mounted inside the fan barrel 310, the air guide tube 400 may be independently mounted inside the fan barrel 310, or the air guide tube 400 may be mounted inside the fan barrel 310 to form an integral structure with the fan barrel 310, the fan barrel 310 may also be used to mount components of the cooling assembly of a portable hand-held fan, and the blades 500 are mounted at the rear or inside of the air guide tube 400, and the blades 500 blow air into the fan barrel 310 and make it blow out evenly through the air guide tube 400.

[0349] In one embodiment, the fan rear cover 320 is installed at the rear of the portable handheld fan, and an air filter is installed. Air enters the inside of the fan rear cover 320 through the air intake 120 and is filtered by the air filter. A layer of photocatalyst may be installed on the air filter to achieve sterilization.

[0350] The portable handheld fan is further provided with a rope hanging hole 230, which is provided in the handle part 200 for attaching a portable rope and a hanging decorative member, and the user can fix and attach the portable handheld fan through the rope hanging hole 230.

[0351] The above examples represent only preferred embodiments of the present invention, and although the description is specific and detailed, it should not be understood as limiting the patent scope of the invention. It should be noted that those skilled in the art may make minor modifications and improvements without departing from the spirit of the present invention, and all such modifications and improvements fall within the scope of the present invention. Therefore, the scope of the present invention is determined by the appended claims.

Claims

1. A portable fan, The device includes a blower unit and a handle unit, the handle unit is provided with a first connecting member, the blower unit is provided with a second connecting member, the blower unit and the handle unit are connected via a fixing member, the fixing member passes through the first connecting member and the second connecting member, and connects the blower unit and the handle unit, and a part of the handhold unit is fitted into the blower unit and / or a part of the blower unit is fitted into the handhold unit. A portable fan characterized by:

2. The blower unit includes a fan base, a mixed flow fan provided in the fan base, and a pressurizing table provided over the mixed flow fan. The mixed flow fan is located in front of the fan base, and rotates around a rotation axis to generate an airflow.

2. The portable fan according to claim 1.

3. The fan base includes an inner ring, an outer ring, and a plurality of connecting ribs connected between the inner ring and the outer ring, a stopper plate is connected between the two connecting ribs, a second connecting member is provided on the stopper plate, a protrusion is provided on an end of the handle, the first connecting member is provided on the protrusion, and the first connecting member is provided corresponding to the second connecting member.

3. The portable fan according to claim 2.

4. The fixing member is a screw, and the first connecting member and the second connecting member are screw holes.

4. The portable fan according to claim 3.

5. One of the first connecting member and the second connecting member is a connecting locking groove, and the other is a connecting snap.

3. The portable fan according to claim 2.

6. A locking groove is provided on the outer wall surface of one end of the outer ring of the fan base that is close to the pressurizing stand, and a snap is provided on one end of the pressurizing stand that is close to the fan base, so that the pressurizing stand is connected to the fan base and the pressurizing stand is connected to the front side of the mixed flow fan.

3. The portable fan according to claim 2.

7. A battery and a circuit board are provided inside the handle, and the battery is electrically connected to the circuit board.

3. The portable fan according to claim 2.

8. The blower further includes a sleeve, and the pressurizing table, the fan base, and the mixed flow fan are disposed within the sleeve, limiting radial relative displacement of the pressurizing table, the fan base, and the mixed flow fan.

3. The portable fan according to claim 2.

9. The pressure table includes a pressure surface that increases at least partially radially from one end remote from the fan base to one end close to the fan base.

3. The portable fan according to claim 2.

10. The sleeve has a side wall provided with a mounting hole through which the protrusion passes, and the sleeve has openings at both ends, And / or, the portable fan further includes a three-phase high-speed motor, and in a usage scenario where high rotation speeds and high energy consumption occur, the usage durability can be improved by replacing the handheld portion and / or the battery built into the handheld portion.

4. The portable fan according to claim 3.

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