Neck fan

Abstract

Disclosed in the present utility model is a neck fan, comprising a housing that can be worn on the neck. A fan assembly is provided in the housing; the fan assembly comprises a stator assembly, a rotor assembly, a metal shaft sleeve, and a connecting shaft; the stator assembly is sleeved on the circumferential outer side wall of a mounting column; the metal shaft sleeve is mounted in a mounting hole of the mounting column; an impeller on the rotor assembly is rotatably arranged in a shaft hole of the metal shaft sleeve by means of the connecting shaft; an oil storage space is defined between one end of the metal shaft sleeve and the opening of the mounting hole; the oil storage space can store lubricating oil. The present utility model can reduce the wear between the connecting shaft and the shaft hole, avoiding the increase of the gap between the connecting shaft and the shaft hole, thereby reducing vibration of the impeller, reducing noise, and enabling the product to remain silent for a long time.

Description

A neck hanging fan Technical Field

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

[0002] A neck-hanging fan is a wearable device that blows air around the user's neck. It moves with the user, freeing their hands. It blows air toward the face and neck, thereby cooling and dissipating heat. A neck-hanging fan generally consists of a wearable housing, which contains a chamber and a fan assembly. The fan assembly is mounted within the chamber, and an air inlet and outlet are located on the outside of the housing, connecting to the chamber.

[0003] The fan assembly generally includes a stator assembly and a rotor assembly. The stator assembly is fixedly connected to the casing, and the impeller on the rotor assembly is rotatably connected to the shaft hole on the casing through a connecting shaft. During long-term use, the connecting shaft and the shaft hole are prone to wear, resulting in an increase in the gap between the connecting shaft and the shaft hole, causing the impeller to vibrate violently and make loud noises, and the product's silent effect is poor.

[0004] Utility Model Content

[0005] The utility model addresses the deficiencies in the prior art and provides a neck hanging fan, which can reduce the wear between the connecting shaft and the shaft hole, avoid the increase of the gap between the connecting shaft and the shaft hole, reduce the vibration of the impeller, and reduce the noise, so that the product can remain silent for a long time.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A neck-hanging fan comprises a shell that can be worn on the neck, the shell being provided with at least one accommodating chamber, the outer surface of the shell being provided with an air inlet and an air outlet connected to the accommodating chamber, a fan assembly being provided in the accommodating chamber, the fan assembly comprising a stator assembly, a mover assembly, a metal bushing and a connecting shaft, a mounting post connected to the shell being provided in the accommodating chamber, the stator assembly being sleeved on the circumferential outer wall of the mounting post, a mounting hole being provided in the mounting post, the metal bushing being installed in the mounting hole, the impeller on the mover assembly being connected to one end of the connecting shaft, the connecting shaft being rotatably arranged in the axial hole of the metal bushing, a distance being maintained between the top end of the metal bushing and the top end of the mounting post, the top end of the metal bushing being lower than the opening of the mounting hole, so that an oil storage tank is formed between the metal bushing and the opening of the mounting hole, the oil storage tank being connected to the axial hole, and the oil storage tank The tank can store lubricating oil; by setting a fan assembly consisting of a stator assembly, a mover assembly, a metal sleeve and a connecting shaft, a mounting post is set in the shell, the stator assembly is sleeved on the circumferential outer wall of the mounting post, and the metal sleeve is installed in the mounting hole. A distance is maintained between the top end of the metal sleeve and the top end of the mounting post, and the top end of the metal sleeve is lower than the opening of the mounting hole, so that an oil storage tank is formed between the metal sleeve and the opening of the mounting hole. The oil storage tank is connected with the shaft hole, and the oil storage tank can store lubricating oil. The impeller is rotatably connected to the shaft hole of the metal sleeve through the connecting shaft. The lubricating oil in the oil storage tank can flow into the shaft hole to lubricate the connecting shaft well, thereby reducing the wear between the connecting shaft and the shaft hole, avoiding the increase of the gap between the connecting shaft and the shaft hole, reducing the vibration of the impeller, and reducing the noise, so that the product can remain silent for a long time; at the same time, the oil storage tank can store a large amount of lubricating oil, and the replacement time is longer.

[0008] In an embodiment of the present disclosure, the outer diameter of the metal sleeve is greater than the inner diameter of the mounting hole. When the metal sleeve is installed in the mounting hole, the circumferential outer side wall of the mounting column expands outward and is tightly connected to the stator assembly.

[0009] In an embodiment of the present disclosure, the distance between the top end of the metal sleeve and the top end of the mounting post is 3 mm to 5 mm.

[0010] In an embodiment of the present disclosure, the metal bushing is a copper bushing.

[0011] A neck-hanging fan comprises a shell wearable on the neck, a fan assembly being provided in the shell, the fan assembly comprising a stator assembly and a mover assembly, the stator assembly being fixedly connected to the shell, the impeller on the mover assembly being rotatably connected to the shell via a connecting shaft, the stator assembly being provided with an electrically connected coil and a circuit board, the circuit board being perpendicular to the axis of the connecting shaft, the circuit board being provided with a Hall element, the Hall element being arranged flat on the circuit board, and the thickness direction of the Hall element being parallel to the axis of the connecting shaft.

[0012] In an embodiment of the present disclosure, a notch is provided on the circumferential outer side wall of the circuit board, and the Hall element is installed in the notch.

[0013] A neck-hanging fan comprises a shell wearable on the neck, a fan assembly is arranged in the shell, and an impeller is arranged on the fan assembly. The impeller comprises a hub, a plurality of blades and at least one connecting ring, and the blades extend outward from the circumferential outer side wall of the hub to the connecting ring.

[0014] In an embodiment of the present disclosure, the width of the connecting ring is 0.8 mm to 1.2 mm.

[0015] In an embodiment of the present disclosure, the connecting ring is provided with one, and the end surface of one end of the blade along the axial direction of the hub is flush with the end surface of the connecting ring.

[0016] In an embodiment of the present disclosure, the connecting ring is provided with one, and the end surface of the other end of the blade along the axial direction of the hub is flush with the end surface of the connecting ring.

[0017] In an embodiment of the present disclosure, there is one connecting ring, which is connected to the center of the extended end of the blade.

[0018] In an embodiment of the present disclosure, two connecting rings are provided, and the two connecting rings are spaced apart along the axial direction of the hub. The end face of one end of the blade along the axial direction of the hub is flush with the end face of one of the connecting rings, and the end face of the other end of the blade along the axial direction of the hub is flush with the end face of the other connecting ring.

[0019] In an embodiment of the present disclosure, the blade includes a first curved portion and a second curved portion that are integrally connected, one end of the first curved portion is connected to the hub, and the first curved portion bends and extends inward in a counterclockwise direction, and one end of the second curved portion away from the first curved portion is connected to the connecting ring, and the second curved portion bends and extends outward in a clockwise direction.

[0020] A neck-hanging fan comprises a shell that can be worn on the neck, wherein at least one neck support is provided on the side of the shell facing the neck, and when the fan is worn, the surface of the neck support away from the shell is in contact with the neck.

[0021] In an embodiment of the present disclosure, the neck support includes a mounting seat and a fitting piece, the mounting seat is connected to the shell, and the fitting piece is installed on a side of the mounting seat away from the shell.

[0022] In an embodiment of the present disclosure, a first arc-shaped fitting surface is formed on a side of the fitting sheet away from the shell, and the first arc-shaped fitting surface protrudes toward the shell.

[0023] In an embodiment of the present disclosure, the mounting seat is snap-connected to the shell, the shell is provided with at least one clamping block, the mounting seat is provided with a clamping hole, the clamping block cooperates with the clamping hole to enable the mounting seat to be snap-connected to the shell.

[0024] In an embodiment of the present disclosure, a pressure plate is provided between the mounting seat and the fitting sheet, the pressure plate is connected to the mounting seat, and the side of the fitting sheet close to the mounting seat is attached to the pressure plate. A first elastic block is provided on the pressure plate, and the first elastic block abuts against the clamping block to limit the movement of the mounting seat toward or away from the shell.

[0025] In an embodiment of the present disclosure, the circumferential edge of the bonding sheet is provided with a first edging, the circumferential edge of the pressure plate is provided with a second edging, and the side of the mounting seat away from the shell is provided with an annular groove, the first edging and the second edging are both provided in the annular groove, and the outer wall of the first edging is in contact with the inner wall of the annular groove, and the inner wall of the first edging is in contact with the outer wall of the second edging.

[0026] In an embodiment of the present disclosure, at least one positioning column is further provided on the shell, and a positioning hole is provided on the mounting seat. During assembly, the positioning column is passed through the positioning hole to limit the rotation of the mounting seat relative to the shell, and the end of the positioning column away from the shell passes through the positioning hole and abuts against the second elastic block on the pressure plate.

[0027] The utility model has obvious advantages and beneficial effects compared with the prior art. Specifically, a fan assembly consisting of a stator assembly, a mover assembly, a metal sleeve and a connecting shaft is provided, a mounting post is provided in the shell, the stator assembly is sleeved on the circumferential outer wall of the mounting post, and the metal sleeve is installed in the mounting hole. A spacing is maintained between the top end of the metal sleeve and the top end of the mounting post, and the top end of the metal sleeve is lower than the opening of the mounting hole, so that an oil storage tank is formed between the metal sleeve and the opening of the mounting hole. The oil storage tank is connected to the shaft hole, and the oil storage tank can store lubricating oil. The impeller is rotatably connected to the shaft hole of the metal sleeve through the connecting shaft. The lubricating oil in the oil storage tank can flow into the shaft hole to lubricate the connecting shaft well, thereby reducing the wear between the connecting shaft and the shaft hole, avoiding the increase of the gap between the connecting shaft and the shaft hole, reducing the vibration of the impeller, and reducing the noise, so that the product can remain silent for a long time; at the same time, the oil storage tank can store a large amount of lubricating oil, and the replacement time is longer.

[0028] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of the assembly structure of the first embodiment of the present utility model;

[0030] FIG2 is an exploded schematic diagram of the first embodiment of the present invention;

[0031] FIG3 is a side view of the first embodiment of the present utility model;

[0032] FIG4 is a schematic cross-sectional view at AA in FIG3 ;

[0033] FIG5 is an exploded schematic diagram of the neck collar and the housing according to the first embodiment of the present invention;

[0034] FIG6 is a cross-sectional schematic diagram of the neck collar and the housing according to the first embodiment of the present invention;

[0035] FIG7 is a schematic diagram of the impeller structure of the first embodiment of the present utility model;

[0036] FIG8 is a schematic diagram of the impeller structure of the second embodiment of the present utility model;

[0037] FIG9 is a schematic diagram of the impeller structure of the third embodiment of the present utility model;

[0038] FIG10 is a schematic diagram of the impeller structure of the fourth embodiment of the present utility model;

[0039] FIG11 is a schematic diagram of the impeller structure of the fifth embodiment of the present invention.

[0040] Description of the accompanying symbols: 10 - housing 11 - accommodating chamber 12 - air inlet 13 - air outlet 14 - mounting column 141 - mounting hole 142 - opening 143 - oil storage tank 15 - clamping block 16 - positioning column 20 - fan assembly 21 - stator assembly 211 - coil 2111 - through hole 212 - circuit board 2121 - notch 213 - Hall element 22 - moving subassembly 221 - impeller 2211 - hub 2212 - blade 2213 - connecting ring 2214 - first curved portion 2215 - Second curved portion 222 - Ring magnet 23 - Metal sleeve 231 - Shaft hole 24 - Connecting shaft 30 - Neck support 31 - Mounting seat 311 - Clamping hole 312 - Positioning hole 313 - Annular groove 32 - Fitting piece 321 - First arc-shaped fitting surface 322 - First edging 33 - Pressing plate 331 - First elastic block 332 - First avoidance groove 333 - Second arc-shaped fitting surface 334 - Second edging 335 - Second elastic block 336 - Second avoidance groove DETAILED DESCRIPTION

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0043] As shown in Figures 1-4, in a first embodiment, a neck-hanging fan disclosed in the present invention includes a shell 10 that can be worn on the neck, and at least one accommodating chamber 11 is provided in the shell 10. For example, the number of the accommodating chambers 11 is four, and the four accommodating chambers 11 are spaced apart in the shell 10. The outer surface of the shell 10 is provided with an air inlet 12 and an air outlet 13 connected to the accommodating chamber 11. A fan assembly 20 is provided in the accommodating chamber 11, and the fan assembly 20 includes a stator assembly 21, a mover assembly 22, a metal sleeve 23 and a connecting shaft 24. A mounting post 14 connected to the shell 10 is provided in the accommodating chamber 11, and the stator assembly 21 is sleeved on the circumferential outside of the mounting post 14. The wall of the mounting column 14 is provided with a mounting hole 141, and the metal sleeve 23 is installed in the mounting hole 141. The impeller 221 on the movable subassembly 22 is connected to one end of the connecting shaft 24, and the connecting shaft 24 is rotatably arranged in the shaft hole 231 of the metal sleeve 23. A spacing b1 is maintained between the top end of the metal sleeve 23 and the top end of the mounting column 14. Specifically, the spacing b1 is 3mm-5mm, and the spacing b1 is preferably 4mm. The top end of the metal sleeve 23 is lower than the opening of the mounting hole 141, so that an oil storage tank 143 is formed between the metal sleeve 23 and the opening of the mounting hole 141. The oil storage tank 143 is connected to the shaft hole 231, and the oil storage tank 143 can store lubricating oil.

[0044] The outer diameter of the metal sleeve 23 is greater than the inner diameter of the mounting hole 141. When the metal sleeve 23 is installed in the mounting hole 141, the circumferential outer wall of the mounting column 14 expands outward and is tightly connected to the stator assembly 21; by setting the outer diameter of the metal sleeve 23 greater than the inner diameter of the mounting hole 141, when the metal sleeve 23 is installed in the mounting hole 141, the metal sleeve 23 will squeeze the mounting column 14 outward, so that the circumferential outer wall of the mounting column 14 expands outward and is tightly connected to the stator assembly 21, thereby improving the connection stability between the stator assembly 21 and the mounting column 14.

[0045] The stator assembly 21 is provided with an electrically connected coil 211 and a circuit board 212. The coil 211 is provided with a through hole 2111. The stator assembly 21 is sleeved on the circumferential outer wall of the mounting column 14 through the through hole 2111. The impeller 221 is provided with an annular magnet 222 corresponding to the coil 211.

[0046] The metal sleeve 23 is a copper sleeve; the copper sleeve has good wear resistance and can increase the service life.

[0047] The circuit board 212 is perpendicular to the axis of the connecting shaft 24. A Hall element 213 is provided on the circuit board 212. The Hall element 213 is arranged flat on the circuit board 212. The thickness direction b2 of the Hall element 213 is parallel to the axis of the connecting shaft 24. The end of the connecting shaft 24 away from the impeller 221 protrudes from the outer surface of the Hall element 213 away from the coil 211. By adopting the installation method of being arranged flat on the circuit board 212 and the thickness direction b2 of the Hall element 213 being parallel to the axis of the connecting shaft 24, the Hall element 213 occupies less space along the axis direction of the connecting shaft 24, thereby making the stator assembly 21 more compact and the entire fan assembly 20 smaller. By arranging one end of the impeller 221 of the connecting shaft 24 to protrude from the outer surface of the Hall element 213 away from the coil 211, it is ensured that the Hall element 213 can sense the rotation speed of the connecting shaft 24 in real time.

[0048] A notch 2121 is provided on the circumferential outer wall of the circuit board 212, and the Hall element 213 is installed in the notch 2121. The side surface of the Hall element 213 away from the coil 211 protrudes from the side surface of the circuit board 212 away from the coil 211; by providing the notch 2121 on the circumferential outer wall of the circuit board 212 and installing the Hall element 213 in the notch 2121, the space occupied by the Hall element 213 along the axial direction of the connecting shaft 24 can be further reduced.

[0049] As shown in FIG7 , the impeller 221 includes a hub 2211, a plurality of blades 2212 and a connecting ring 2213. The blades 2212 extend outward from the circumferential outer wall of the hub 2211 to the connecting ring 2213. The central axis of the connecting ring 2213 is coaxially arranged with the central axis of the hub 2211. The end surface of the blade 2212 along the axial direction of the hub 2211 is flush with the end surface of the connecting ring 2213. The impeller 221 is composed of a ring 2213, and the blades 2212 extend outward from the circumferential outer wall of the hub 2211 to the connecting ring 2213, so that the contact area between the blades 2212 and the air is larger, the wind gathering effect is good, and the blowing efficiency is high. In addition, the blades 2212 extend to the connecting ring 2213, and the connecting ring 2213 can be used to enhance the stability of the blades 2212. When the blades 2212 rotate with the hub 2211, the vibration of the blades 2212 can be reduced, so that the impeller 221 has a good silent effect.

[0050] The width d of the connecting ring 2213 is 0.8 mm to 1.2 mm, preferably the width d of the connecting ring 2213 is 1.0 mm, and the thickness h of the connecting ring 2213 is 0.6 mm to 1.0 mm, preferably the thickness h of the connecting ring 2213 is 0.8 mm; by adopting a connecting ring 2213 with a width d of 0.8 mm to 1.2 mm, the space occupied by the connecting ring 2213 is reduced, and the connecting ring 2213 is prevented from affecting the wind gathering of the blade 2212.

[0051] As shown in Figures 1, 5 and 6, at least one neck support 30 is provided on the side of the shell 10 facing the neck. Exemplarily, there are two neck supports 30. When worn, the surface of the neck support 30 away from the shell 10 is in contact with the neck. By providing the neck support 30 on the side of the shell 10 facing the neck, when worn, the surface of the neck support 30 away from the shell 10 is in contact with the neck, thereby separating the shell 10 from the neck and reducing the vibration generated by the shell 10 from being transmitted to the neck, making it more comfortable to use.

[0052] The neck support 30 includes a mounting seat 31 and a fitting sheet 32. The mounting seat 31 is connected to the shell 10, and the fitting sheet 32 ​​is installed on the side of the mounting seat 31 away from the shell 10. Specifically, the fitting sheet 32 ​​can be formed of a soft rubber material or a sponge material. By setting up the neck support 30 composed of the mounting seat 31 and the fitting sheet 32, a split setting is adopted, which has a simple structure, is easy to process, and has low cost.

[0053] A first curved fitting surface 321 is formed on the side of the fitting sheet 32 ​​away from the shell 10, and the first curved fitting surface 321 protrudes toward the shell 10; by providing the first curved fitting surface 321 on the fitting sheet 32, the curved fitting surface fits the neck when worn, which is ergonomic and more comfortable to wear.

[0054] The mounting seat 31 is connected to the housing 10 by snap-fitting. By providing the mounting seat 31 and the housing 10 with snap-fitting connection, assembly and disassembly are convenient.

[0055] At least one clamping block 15 is provided on the shell 10. Exemplarily, there are two clamping blocks 15. A clamping hole 311 is provided on the mounting seat 31. The clamping block 15 cooperates with the clamping hole 311 to enable the mounting seat 31 to be snap-connected with the shell 10. During assembly, the mounting seat 31 is moved toward the shell 10 so that the clamping block 15 extends from one end of the clamping hole 311 and extends from the other end of the clamping hole 311, so that the clamping block 15 clamps the mounting seat 31.

[0056] When the locking cam 331 is unlocked, the locking cam 332 is unlocked and the locking cam 333 is unlocked, so that the user can lock the locking cam 332. When the user locks the locking cam 332, the user can lock the locking cam 332.

[0057] The second curved fitting surface 333 is provided on the side of the pressure plate 33 facing the fitting sheet 32, and the second curved fitting surface 333 has the same protruding direction as the first curved fitting surface 321, and the second curved fitting surface 333 has the same curvature as the first curved fitting surface 321, and the side of the fitting sheet 32 ​​close to the mounting seat 31 is attached to the second curved fitting surface 333; by providing the second curved fitting surface 333 on the side of the pressure plate 33 facing the fitting sheet 32, the second curved fitting surface 333 has the same protruding direction as the first curved fitting surface 321, and the second curved fitting surface 333 has the same curvature as the first curved fitting surface 321, so that when the side of the fitting sheet 32 ​​close to the mounting seat 31 is attached to the second curved fitting surface 333, the fitting sheet 32 ​​is not easily deformed.

[0058] The pressure plate 33 is connected to the mounting seat 31 by snapping; the snapping connection facilitates assembly and disassembly of the pressure plate 33 and the mounting seat 31.

[0059] The circumferential edge of the bonding sheet 32 ​​is provided with a first edge 322, and the circumferential edge of the pressure plate 33 is provided with a second edge 334. The side of the mounting seat 31 away from the shell 10 is provided with an annular groove 313, and the first edge 322 and the second edge 334 are both provided in the annular groove 313, and the outer wall of the first edge 322 abuts against the inner wall of the annular groove 313, and the inner wall of the first edge 322 abuts against the outer wall of the second edge 334. Edge 322, a second edge 334 is provided on the circumferential edge of the pressure plate 33, and an annular groove 313 is provided on the side of the mounting seat 31 away from the shell 10, and the first edge 322 and the second edge 334 are inserted into the annular groove 313, so that the inner wall of the annular groove 313 abuts the outer wall of the first edge 322, and the inner wall of the first edge 322 abuts the outer wall of the second edge 334, thereby preventing the bonding sheet 32 ​​from falling off from the mounting seat 31, and the abutment clamping method can be convenient for assembly and disassembly, and easy to maintain.

[0060] The shell 10 is also provided with at least one positioning column 16. Exemplarily, the number of the positioning columns 16 is two. The mounting seat 31 is provided with a positioning hole 312. During assembly, the positioning column 16 is passed through the positioning hole 312 to limit the rotation of the mounting seat 31 relative to the shell 10. The end of the positioning column 16 away from the shell 10 passes through the positioning hole 312 and abuts against the second elastic block 335 on the pressure plate 33. Specifically, the pressure plate 33 is also provided with a second avoidance groove 336, and the second elastic block 335 can be elastically deformed and is arranged in the second avoidance groove 336.

[0061] As shown in FIG. 8 , in the second embodiment, the difference from the first embodiment is that the end surface of the other end of the blade 2212 along the axial direction of the hub 2211 is flush with the end surface of the connecting ring 2213 .

[0062] As shown in FIG. 9 , in the third embodiment, the difference from the first and second embodiments is that the connecting ring 2213 is connected to the center of the extended end of the blade 2212 .

[0063] As shown in Figure 10, in the fourth embodiment, the difference from the first embodiment, the second embodiment and the third embodiment is that there are two connecting rings 2213, and the two connecting rings 2213 are arranged at intervals along the axial direction of the hub 2211. The end face of one end of the blade 2212 along the axial direction of the hub 2211 is flush with the end face of one of the connecting rings 2213, and the end face of the other end of the blade 2212 along the axial direction of the hub 2211 is flush with the end face of the other connecting ring 2213; by adopting double connecting rings 2213, the silent effect of the impeller 221 is better.

[0064] As shown in Figure 11, in the fifth embodiment, the difference between it and the first embodiment, the second embodiment, the third embodiment and the fourth embodiment is that the blade 2212 includes a first curved portion 2214 and a second curved portion 2215 that are integrally connected, one end of the first curved portion 2214 is connected to the hub 2211, and the first curved portion 2214 bends and extends inwardly along the counterclockwise direction S1, and the second curved portion 2215 is connected to the connecting ring 2213 at one end away from the first curved portion 2214, and the second curved portion 2215 bends and extends outwardly along the clockwise direction S2. It should be understood that the first curved portion 2214 can also be set to bend and extend inwardly in the clockwise direction, and accordingly, the second curved portion 2215 is set to bend and extend outwardly in the counterclockwise direction. The blade 2212 is composed of the first curved portion 2214 and the second curved portion 2215, and the bending and extension directions of the first curved portion 2214 and the second curved portion 2215 are opposite, thereby improving the wind gathering effect and the quieting effect of the blade 2212.

[0065] In summary, the present invention provides a fan assembly 20 consisting of a stator assembly 21, a mover assembly 22, a metal sleeve 23, and a connecting shaft 24. A mounting post 14 is provided in the housing 10. The stator assembly 21 is sleeved on the circumferential outer wall of the mounting post 14. The metal sleeve 23 is installed in the mounting hole 141. A spacing b1 is maintained between the top of the metal sleeve 23 and the top of the mounting post 14. The top of the metal sleeve 23 is lower than the opening of the mounting hole 141, so that an oil storage tank 143 is formed between the metal sleeve 23 and the opening 142 of the mounting hole 141. The oil storage tank 143 is connected to the shaft hole 231. The oil storage tank 143 can store lubricating oil. The impeller 221 is rotatably connected to the shaft hole 231 of the metal sleeve 23 through the connecting shaft 24. The lubricating oil in the oil storage tank 143 can flow into the shaft hole 231 to lubricate the connecting shaft 24, thereby reducing the wear between the connecting shaft 24 and the shaft hole 231, avoiding the increase of the gap between the connecting shaft 24 and the shaft hole 231, reducing the vibration of the impeller 221, and reducing the noise, so that the product can remain silent for a long time; at the same time, the oil storage tank 143 can store a large amount of lubricating oil, and the replacement time is longer.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical practice of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A neck hanging fan, comprising a shell that can be worn on the neck, wherein at least one accommodating cavity is provided in the shell, an air inlet and an air outlet communicating with the accommodating cavity are provided on the outer surface of the shell, and a fan assembly is provided in the accommodating cavity, characterized in that: The fan assembly includes a stator assembly, a movable assembly, a metal sleeve and a connecting shaft. A mounting column connected to the shell is provided in the accommodating cavity. The stator assembly is sleeved on the circumferential outer wall of the mounting column. A mounting hole is provided in the mounting column. The metal sleeve is installed in the mounting hole. The impeller on the movable assembly is connected to one end of the connecting shaft. The connecting shaft is rotatably arranged in the axial hole of the metal sleeve. A distance is maintained between the top end of the metal sleeve and the top end of the mounting column. The top end of the metal sleeve is lower than the opening of the mounting hole, so that an oil storage tank is formed between the metal sleeve and the opening of the mounting hole. The oil storage tank is connected to the axial hole, and the oil storage tank can store lubricating oil.

2. The neck hanging fan according to claim 1, characterized in that: The outer diameter of the metal sleeve is greater than the inner diameter of the mounting hole. When the metal sleeve is installed in the mounting hole, the circumferential outer side wall of the mounting column expands outward and is tightly connected with the stator assembly.

3. The neck hanging fan according to claim 1, characterized in that: The distance between the top end of the metal sleeve and the top end of the mounting column is 3mm-5mm.

4. The neck hanging fan according to claim 1, characterized in that: The metal bushing is a copper bushing.

5. A neck hanging fan, comprising a housing that can be worn on the neck, wherein a fan assembly is arranged in the housing, wherein the fan assembly comprises a stator assembly and a mover assembly, wherein the stator assembly is fixedly connected to the housing, wherein an impeller on the mover assembly is rotatably connected to the housing via a connecting shaft, wherein an electrically connected coil and a circuit board are arranged on the stator assembly, wherein: The circuit board is perpendicular to the axis of the connecting shaft. A Hall element is arranged on the circuit board. The Hall element is arranged flat on the circuit board. The thickness direction of the Hall element is parallel to the axis of the connecting shaft.

6. The neck hanging fan according to claim 5, characterized in that: A notch is provided on the circumferential outer side wall of the circuit board, and the Hall element is installed in the notch.

7. A neck-hanging fan, comprising a housing that can be worn on the neck, wherein a fan assembly is arranged in the housing, characterized in that: The fan assembly is provided with an impeller, which includes a hub, a plurality of blades and at least one connecting ring. The blades extend outward from the circumferential outer side wall of the hub to the connecting ring.

8. The neck hanging fan according to claim 7, characterized in that: The width of the connecting ring is 0.8 mm to 1.2 mm.

9. The neck hanging fan according to claim 7, characterized in that: The connecting ring is provided with one end surface of the blade along the axial direction of the hub and is flush with the end surface of the connecting ring.

10. The neck hanging fan according to claim 7, characterized in that: The connecting ring is provided with one, and the end surface of the other end of the blade along the axial direction of the hub is flush with the end surface of the connecting ring.

11. The neck hanging fan according to claim 7, characterized in that: The connecting ring is provided with one, and the connecting ring is connected to the center of the extended end of the blade.

12. The neck hanging fan according to claim 7, characterized in that: There are two connecting rings, which are spaced apart along the axial direction of the hub. The end face of one end of the blade along the axial direction of the hub is flush with the end face of one of the connecting rings, and the end face of the other end of the blade along the axial direction of the hub is flush with the end face of the other connecting ring.

13. The neck hanging fan according to claim 7, characterized in that: The blade includes a first curved portion and a second curved portion that are integrally connected, one end of the first curved portion is connected to the hub, and the first curved portion bends and extends inwardly in a counterclockwise direction, and one end of the second curved portion away from the first curved portion is connected to a connecting ring, and the second curved portion bends and extends outwardly in a clockwise direction.

14. A neck hanging fan, characterized in that: It comprises a shell that can be worn on the neck, wherein at least one neck support is provided on the side of the shell facing the neck, and when worn, the surface of the neck support away from the shell fits on the neck.

15. The neck hanging fan according to claim 14, characterized in that: The neck support comprises a mounting seat and a fitting sheet, wherein the mounting seat is connected to the shell, and the fitting sheet is mounted on a side of the mounting seat away from the shell.

16. The neck hanging fan according to claim 15, characterized in that: A first arc-shaped fitting surface is formed on one side of the fitting sheet away from the shell, and the first arc-shaped fitting surface protrudes toward the direction approaching the shell.

17. The neck hanging fan according to claim 15, characterized in that: The mounting seat is snap-connected with the shell, the shell is provided with at least one clamping block, the mounting seat is provided with a clamping hole, and the clamping block cooperates with the clamping hole to enable the mounting seat to be snap-connected with the shell.

18. The neck hanging fan according to claim 17, characterized in that: A pressure plate is provided between the mounting seat and the bonding sheet, the pressure plate is connected to the mounting seat, the side of the bonding sheet close to the mounting seat is attached to the pressure plate, and a first elastic block is provided on the pressure plate, the first elastic block abuts against the clamping block to limit the movement of the mounting seat towards or away from the shell.

19. The neck hanging fan according to claim 18, characterized in that: The circumferential edge of the bonding sheet is provided with a first edging, the circumferential edge of the pressure plate is provided with a second edging, and the side of the mounting seat away from the shell is provided with an annular groove, the first edging and the second edging are both provided in the annular groove, and the outer wall of the first edging abuts against the inner wall of the annular groove, and the inner wall of the first edging abuts against the outer wall of the second edging.

20. The neck hanging fan according to claim 15, characterized in that: The shell is also provided with at least one positioning column, and the mounting seat is provided with a positioning hole. During assembly, the positioning column is passed through the positioning hole to limit the rotation of the mounting seat relative to the shell. One end of the positioning column away from the shell passes through the positioning hole and abuts against the second elastic block on the pressure plate.