High-speed neck-hanging fan

Abstract

The utility model discloses a high-speed neck-hanging fan which comprises a neck-hanging piece and a fan body connected to the end of the neck-hanging piece, the fan body comprises a shell, an air channel and a coordination base are formed on the shell, the coordination base is connected to one side of the periphery of the air channel, and the coordination base and the air channel are arranged in a stacked mode on the radial section of the air channel. An air inlet is formed in one end of the air duct, an air outlet is formed in the other end of the air duct, a driving fan blade set is arranged in the air duct, and the driving fan blade set guides air located at the air inlet to flow through the air duct and then blow the air out of the air outlet in an accelerated mode. And the air speed is greatly increased, the air supply distance is greatly increased, the mute and noise reduction effects are achieved, and the use experience feeling of a user is effectively improved.

Description

Technical Field

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

[0002] When going out or doing outdoor activities in summer, the weather is relatively hot and there may be no air conditioner. To facilitate cooling at any time, portable fans have emerged. They are widely popular because of their convenient carrying and ready-to-use features.

[0003] Among them, the neck fan is most suitable for carrying and using during outdoor activities. It can be worn on the human neck and does not require manual holding during use, achieving the effect of freeing both hands.

[0004] Current neck fans are roughly divided into two types. One type uses a semi-closed ring-shaped neck body, integrating the fan into the ring-shaped neck body. The air outlet, air inlet, and various related electrical components are installed on the neck body. During the working process of this type of neck fan, the moving components are closer to the human neck. Therefore, obvious working noise will be formed during use. Although it can achieve the corresponding blowing and cooling effect, at the same time, the user has to endure the annoyance of the noise, and the use experience is not ideal. Moreover, since various related electrical components are arranged along the neck body, their gravity centers do not coincide, and it is easy to occur that the wearing is unstable, resulting in deviation or detachment from the human neck during wearing. The other type uses a snake-shaped hose with two fan bodies connected to both ends respectively. The snake-shaped hose can be deformed for wearing on the human neck, and the blowing direction of the two fan bodies at both ends can also be adjusted by changing the shape of the snake-shaped hose. However, currently, this type of fan is prone to unstable wearing during use because the fan bodies are relatively light and the downward pulling force formed at both ends of the snake-shaped hose is relatively small. In particular, when the blowing direction of the fan body is adjusted, its center of gravity will shift significantly. Therefore, there is a relatively serious mutual restriction between wearing stability and blowing direction adjustment, resulting in an unsatisfactory use experience.

[0005] In addition, due to structural limitations, the existing neck fans cannot achieve the effect of high-speed blowing, and there is a certain degree of deficiency in the cooling effect. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a high-speed neck fan, which is stable and not prone to displacement or falling off when worn by the human body, significantly improves the wind speed and air supply distance, achieves the effect of noise reduction, and effectively improves the user's use experience, solving the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solution: A high-speed neck fan, comprising a neck-mounted member and a fan body connected to the end of the neck-mounted member. The fan body includes a housing, on which an air duct and a coordination base are formed. The coordination base is connected to one side of the periphery of the air duct and they are arranged in a stacked form in the radial cross-section of the air duct. One end of the air duct is set as an air inlet and the other end is set as an air outlet. A driving fan blade group is arranged in the air duct, and the driving fan blade group guides the air located at the air inlet to flow through the air duct and then accelerates to blow outwards from the air outlet.

[0008] Preferably, a motor base is coaxially arranged in the air duct. A part of the circumferential wall surface of the motor base extends towards the inner wall of the air duct to form a boosting blade. The boosting blade is arranged on the side of the driving fan blade group facing the air outlet. The driving fan blade group includes a rotating seat and driving fan blades uniformly arranged on the outer circumferential wall surface of the rotating seat. A rectifying blade is arranged on the side of the boosting blade away from the driving fan blade group. The boosting blade realizes wind cutting and boosting of the air flow conveyed by the driving fan blades, and the rectifying blade guides the boosted air flow output from the boosting blade so that the boosted air flow blows outwards in a direction parallel to the axial direction of the air outlet.

[0009] Preferably, the surface of the boosting blade facing the outside of the air outlet is the wind-receiving surface, and the surface of the driving fan blade facing the boosting blade is the wind-driving surface. During the rotation of the driving fan blade group, the wind-driving surface rotates towards the wind-receiving surface. The curved surfaces where the wind-receiving surface and the wind-driving surface are located in the same radial region intersect, and the included angle θ1 between the wind-receiving surface and the wind-driving surface is < 90°.

[0010] Preferably, the included angle θ2 between the wind-receiving surface and the central axis of the driving fan blade group satisfies: 30° < θ2 < 60°.

[0011] Preferably, the included angle θ2 between the wind-receiving surface and the central axis of the driving fan blade group is 45°.

[0012] Preferably, a wind guiding member is sleeved in the air duct. The wind guiding member is a tubular body. The motor base is arranged in the wind guiding member. The boosting blade is formed by a part of the circumferential wall surface of the motor base extending towards the inner wall of the wind guiding member. Linear grooves are arranged on the outer wall surface of the wind guiding member, and the linear grooves extend along the axial direction of the wind guiding member. Linear columns are arranged on the inner wall surface of the air duct corresponding to the linear grooves. The wind guiding member realizes directional sliding through the cooperation of the linear grooves and the linear columns.

[0013] Preferably, an air outlet cover is provided at the air outlet, a connection base is coaxially arranged at the central axis of the air outlet cover, the rectifying blades are radially extended from the circumferential partial wall surface of the connection base, the rectifying blades are arranged parallel to the central axis of the air outlet, a limiting step is arranged on the inner wall surface of the air duct at the air outlet, a limiting flange is correspondingly arranged on the outer wall of the air outlet cover for the limiting step, and the air outlet cover is integrally connected with the air duct through the mutual limiting of the limiting step and the limiting flange.

[0014] Preferably, the end of the neck strap is fixedly connected to the fan body through a connecting mechanism. The connecting mechanism includes a hole groove provided on the fan body, a plug inserted into the hole groove, a ring groove provided at the end of the neck strap, and a snap ring that engages with the ring groove. The hole groove penetrates through the shell of the fan body. An axial through hole is provided on the plug. The end of the neck strap sequentially passes through the hole groove and the through hole of the plug and is snap-connected to the snap ring. A bolt column is provided in the hole groove and is arranged parallel to the central axis of the hole groove. A column sleeve is correspondingly arranged on the plug for the bolt column, and the column sleeve can be sleeved on the circumference of the bolt column.

[0015] Preferably, an air inlet cover is provided at the air inlet.

[0016] Preferably, both ends of the neck strap are respectively connected to a fan body. A circuit board assembly is arranged in the coordination base of one of the fan bodies, and the driving fan blade group in its air duct is electrically connected to the circuit board assembly. A storage battery is arranged in the coordination base of the other fan body, and the storage battery and the driving fan blade group in the same fan body are electrically connected to the circuit board assembly through internal wiring in the neck strap.

[0017] Preferably, the circuit board assembly is electrically connected with a control button, a USB interface, and a light-emitting lamp bead. The control button, the USB interface, and the light-emitting lamp bead are all arranged in a through hole preset in the shell of the coordination base. A heat insulation pad is clamped between the storage battery and the side wall of the coordination base away from the air duct.

[0018] Preferably, the neck strap is a deformable snake-shaped tube.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] In the present utility model, a coordination base is formed on the side of the air duct. The coordination base is arranged deviating from the axis of the air duct. When the fan is worn on the human neck, the coordination base is clamped between the human body and the air duct, which can support the fan body, making the air outlet of the fan appropriately far away from the human body shielding area while also blowing towards the direction of the human head. This not only ensures a smoother air outlet path and better cooling effect, but also can form friction between the outer wall of the coordination base and the human body, thereby strengthening the stability of the fan wearing. In addition, by counterweighting with the electrical components inside the coordination base, the downward pulling force of the fan body can be increased, further enhancing the stability of the fan wearing. By setting a pressurization and rectification mechanism on the air duct, the wind speed and the air supply distance are greatly improved, and the effect of noise reduction is also achieved, effectively enhancing the user experience. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is an exploded structure of the present utility model Figure 1 ;

[0023] Figure 3 is an exploded structure of the present utility model Figure 2 ;

[0024] Figure 4 is a schematic structural diagram of the housing of the present utility model;

[0025] Figure 5 is a schematic structural diagram of the air guiding member of the present utility model;

[0026] Figure 6 is a schematic structural diagram of the air outlet cover of the present utility model;

[0027] Figure 7 is a schematic structural diagram of the driving fan blade group of the present utility model.

[0028] In the figure: 1 neck strap; 11 annular groove; 12 snap ring; 13 plug; 131 column sleeve; 2 fan body; 21 air inlet cover; 22 housing; 221 air duct; 222 coordination base; 223 air inlet; 224 air outlet; 225 limit step; 226 linear column; 23 driving fan blade group; 231 rotating seat; 232 driving fan blade; 233 driving surface; 24 air guiding member; 241 motor base; 242 pressurizing blade; 243 wind receiving surface; 244 linear groove; 25 air outlet cover; 251 connecting base; 252 hole groove; 253 bolt column; 254 rectifying blade; 255 limit flange; 26 circuit board assembly; 261 control button; 262 USB interface; 263 light-emitting lamp bead; 27 storage battery; 28 heat insulation pad. Detailed Description of the Preferred Embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1-7 , a high-speed neck fan, which includes a neck-mounted part 1 and a fan body 2 connected to the end of the neck-mounted part 1. The neck-mounted part 1 is a deformable snake-shaped tube. The fan body 2 includes a housing 22. An air duct 221 and a coordination base 222 are formed on the housing 22. The coordination base 222 is connected to one side of the periphery of the air duct 221 and they are arranged in a stacked form in the radial cross-section of the air duct. One end of the air duct 221 is set as an air inlet 223, and the other end is set as an air outlet 224. A driving fan blade group 23 is arranged in the air duct 221. The driving fan blade group 23 guides the air located at the air inlet 223 to flow through the air duct 221 and then accelerates to blow outwards from the air outlet 224.

[0031] A motor base 241 is coaxially arranged in the air duct 221. A wind guiding member 24 is sleeved in the air duct 221. The wind guiding member 24 is a tubular body. The motor base 241 is arranged inside the wind guiding member 24. The booster blades 242 extend from the circumferential partial wall surface of the motor base 241 towards the inner wall of the wind guiding member 24. The booster blades 242 are arranged on the side of the driving fan blade group 23 facing the air outlet 224. The driving fan blade group 23 includes a rotating seat 231 and driving fan blades 232 uniformly arranged on the outer peripheral wall surface of the rotating seat 231. A rectifying blade 254 is arranged on the side of the booster blade 242 away from the driving fan blade group 23. The booster blades 242 perform wind cutting and boosting on the air flow conveyed by the driving fan blades 232. The rectifying blade 254 guides the boosted air flow output from the booster blades 242, so that the boosted air flow blows out axially parallel to the air outlet 224. By combing the high-pressure air flow through the rectifying blade 254, the turbulence phenomenon in the air flow can be effectively reduced, thereby achieving the effect of noise reduction. At the same time, reducing turbulence can also improve the utilization rate of the air flow. The surface of the booster blade 242 facing the outside of the air outlet 224 is the wind receiving surface 243. The surface of the driving fan blade 232 facing the booster blade 242 is the driving wind surface 233. During the rotation of the driving fan blade group 23, the driving wind surface 233 rotates towards the wind receiving surface 243. The curved surface where the wind receiving surface 243 is located and the curved surface where the driving wind surface 233 is located intersect in the same radial region, and the included angle θ1 between the wind receiving surface 243 and the driving wind surface 233 is < 90°. The included angle θ2 between the wind receiving surface 243 and the central axis of the driving fan blade group 23 satisfies: 30° < θ2 < 60°. When the included angle θ2 between the wind receiving surface 243 and the central axis of the driving fan blade group 23 = 45°, the air flow blowing from the booster blade 242 to the rectifying blade 254 is most inclined to be parallel to the axial direction of the air outlet 224, and thus its air flow utilization rate reaches the highest.

[0032] An air outlet cover 25 is provided at the air outlet 224. A connection base 251 is coaxially arranged on the central axis of the air outlet cover 25. The rectifying blades 254 are radially extended from the circumferential partial wall surface of the connection base 251. The rectifying blades 254 are arranged parallel to the central axis of the air outlet 224. A limiting step 225 is provided on the inner wall surface of the air duct 221 at the air outlet 224. A limiting flange 255 is provided on the outer wall of the air outlet cover 25 corresponding to the limiting step 225. The air outlet cover 25 is integrally connected to the air duct 221 through the mutual limiting of the limiting step 225 and the limiting flange 255. A linear groove 244 is provided on the outer wall surface of the air guiding member 24. The linear groove 244 extends along the axial direction of the air guiding member 24. A linear column 226 is provided on the inner wall surface of the air duct 221 corresponding to the linear groove 244. The air guiding member 24 realizes directional sliding through the cooperation of the linear groove 244 and the linear column 226. An air inlet cover 21 is provided at the air inlet 223. During assembly, first insert the air outlet cover 25 from the end of the air duct 221 without the limiting step 225, and then closely insert the air guiding member 24 into the air duct 221 following the air outlet cover 25. Then cover the air inlet cover 21 at the air inlet 223 to make the air inlet cover 21 snap-connect with the air duct 221, so that the air outlet cover 25, the air guiding member 24, the air duct 221, and the air inlet cover 21 can be integrally and fixedly connected, and the assembly operation is simple and fast.

[0033] One end of the neck strap member 1 is fixedly connected to the fan body 2 through a connecting mechanism. The connecting mechanism includes a hole groove 252 provided on the fan body 2, a plug 13 inserted into the hole groove 252, a ring groove 11 provided at one end of the neck strap member 1, and a snap ring 12 that is snap-connected to the ring groove 11. The hole groove 252 is provided at the center of the axis of the air outlet cover 25. The hole groove 252 runs through the air outlet cover 25 from front to back. And the aperture of the hole groove 252 on the side of the air outlet cover 25 facing the air duct 221 is larger than the aperture on the side away from the air duct 221, so that when the plug 13 is inserted from the end with the larger aperture, it will not withdraw from the end with the smaller aperture. An axial through hole is provided on the plug 13. One end of the neck strap member 1 passes through the hole groove 252 and the through hole of the plug 13 in sequence and is snap-connected to the snap ring 12. The outer diameter of the snap ring 12 is larger than the aperture of the axial through hole of the plug 13. Therefore, the snap ring 12 can prevent the neck strap member 1 from detaching from the plug 13. A bolt column 253 is provided in the hole groove 252. The bolt column 253 is arranged parallel to the central axis of the hole groove 252. A column sleeve 131 is provided on the plug 13 corresponding to the bolt column 253. The column sleeve 131 can be sleeved on the circumference of the bolt column 253. After locking a screw on the bolt column 253, the column sleeve 131 can be prevented from withdrawing from the bolt column 253, thereby realizing the fixed connection between the plug 13 and the hole groove 252.

[0034] Both ends of the neck-mounted component 1 are respectively connected to a fan body 2. A circuit board assembly 26 is arranged in the coordination base 222 of one of the fan bodies 2. The driving fan blade group 23 in its air duct 221 is electrically connected to the circuit board assembly 26. A storage battery 27 is arranged in the coordination base 222 of the other fan body 2. The storage battery 27 and the driving fan blade group 23 in the same fan body 2 are electrically connected to the circuit board assembly 26 through the internal wiring of the neck-mounted component 1. The circuit board assembly 26 is electrically connected with a control button 261, a USB interface 262 and a light-emitting lamp bead 263. The control button 261, the USB interface 262 and the light-emitting lamp bead 263 are all arranged in through holes preset in the shell of the coordination base 222. The control button 261 is used to control the working states of the driving fan blade group 23 and the light-emitting lamp bead 263. When the USB interface 262 is externally connected to an external power supply through a charging cable, it can charge the storage battery 27 to supplement electric energy. The light-emitting lamp bead 263 is used for night lighting. A heat insulation pad 28 is clamped between the storage battery 27 and the side wall surface of the coordination base 222 away from the air duct 221. The storage battery 27 will generate a certain amount of heat during operation. The heat insulation pad 28 is provided to prevent the heat from being transmitted to the human body and causing an uncomfortable experience to the human body.

[0035] In summary, for the present utility model, a coordination base 222 is formed on the side of the air duct 221. The coordination base 222 is arranged deviating from the axis of the air duct. When the fan is worn on the human neck, the coordination base 222 is clamped between the human body and the air duct 221, which can hold up the fan body 1, so that the fan air outlet 224 can be appropriately away from the human body shielding area while also blowing towards the direction of the human head. This not only ensures a smoother air outlet path and a better blowing and cooling effect, but also can form friction between the outer wall of the coordination base 222 and the human body, thereby strengthening the wearing stability of the fan. In addition, by arranging weights through the electrical components inside the coordination base 222, the downward pulling force of the fan body 2 can be increased, further strengthening the wearing stability of the fan. By arranging a pressurization and rectification mechanism on the air duct 221, the wind speed and the air supply distance are greatly improved, and the effect of noise reduction is also achieved, effectively improving the user experience.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-speed neck hanging fan, comprising a neck hanging member (1) and a fan body (2) connected to the end of the neck hanging member (1), characterized in that: The fan body (2) comprises a shell (22), on which an air duct (221) and a coordination base (222) are formed, the coordination base (222) being connected to one side of the outer periphery of the air duct (221), and the two are arranged in a stacked form on a radial cross section of the air duct, one end of the air duct (221) is arranged as an air inlet (223), and the other end is arranged as an air outlet (224), and a fan blade group (23) is arranged in the air duct (221), and the fan blade group (23) guides the air at the air inlet (223) to flow through the air duct (221) and then accelerates the air to be blown out from the air outlet (224).

2. A high-speed neck hanging fan according to claim 1, characterized in that: A motor base (241) is coaxially arranged in the air duct (221), and a circumferential wall surface of the motor base (241) extends toward the inner wall of the air duct (221) to form a booster blade (242). The booster blade (242) is arranged on the side of the fan blade group (23) facing the air outlet (224). The fan blade group (23) includes a rotating seat (231) and wind-driving blades (232) evenly arranged on the outer circumferential wall surface of the rotating seat (231). A rectifying blade (254) is arranged on the side of the booster blade (242) away from the fan blade group (23). The booster blade (242) realizes wind cutting and pressurizing of the airflow transported by the wind-driving blade (232), and the rectifying blade (254) guides the boosted airflow output from the booster blade (242) so that the boosted airflow is blown outward in a direction parallel to the axial direction of the air outlet (224).

3. A high-speed neck hanging fan according to claim 2, characterized in that: The surface of the boost blade (242) facing the outer side of the air outlet (224) is the wind receiving surface (243), and the surface of the wind driving blade (232) facing the side of the boost blade (242) is the wind driving surface (233). During the rotation of the wind driving fan blade assembly (23), the wind driving surface (233) rotates toward the wind receiving surface (243), and the curved surface where the wind receiving surface (243) and the curved surface where the wind driving surface (233) are located in the same radial area are intersected, and the angle θ1 between the wind receiving surface (243) and the wind driving surface (233) is less than 90°.

4. A high-speed neck hanging fan according to claim 3, characterized in that: The angle θ2 between the wind receiving surface (243) and the central axis of the fan blade assembly (23) satisfies: 30°<θ2<60°.

5. A high-speed neck hanging fan according to claim 3 or 4, characterized in that: The angle θ2 between the wind receiving surface (243) and the central axis of the fan blade assembly (23) is 45°.

6. A high-speed neck hanging fan according to claim 2, characterized in that: An air guide member (24) is sleeved in the air duct (221), and the air guide member (24) is a tubular body. The motor base (241) is arranged in the air guide member (24), and the booster blade (242) is formed by extending the circumferential wall surface of the motor base (241) toward the inner wall of the air guide member (24). A linear groove (244) is arranged on the outer wall surface of the air guide member (24), and the linear groove (244) extends along the axial direction of the air guide member (24). A linear column (226) is arranged on the inner wall surface of the air duct (221) corresponding to the linear groove (244), and the air guide member (24) realizes directional sliding through the cooperation between the linear groove (244) and the linear column (226).

7. A high-speed neck hanging fan according to claim 2, characterized in that: The air outlet (224) is covered with an air outlet cover (25), and a connecting base (251) is coaxially arranged at the central axis of the air outlet cover (25), and the rectifying blades (254) are formed by radially extending the circumferential wall surface of the connecting base (251), and the rectifying blades (254) are arranged parallel to the central axis of the air outlet (224). A limiting step (225) is arranged on the inner wall surface of the air duct (221) at the air outlet (224), and a limiting flange (255) is arranged on the outer wall of the air outlet cover (25) corresponding to the limiting step (225). The air outlet cover (25) is integrally connected with the air duct (221) by limiting the limiting step (225) and the limiting flange (255) relative to each other.

8. The high-speed neck hanging fan according to claim 1, characterized in that: The end of the neck hanging member (1) is fixedly connected to the fan body (2) via a connecting mechanism, wherein the connecting mechanism comprises a hole groove (252) provided on the fan body (2), a plug (13) inserted into the hole groove (252), an annular groove (11) provided on the end of the neck hanging member (1) and a snap ring (12) mutually engaged with the annular groove (11), the hole groove (252) is provided through the shell of the fan body (2), and the plug (13) is provided with a shaft The end of the neck hanging member (1) passes through the hole groove (252) and the through hole of the plug (13) in sequence and is then snap-connected with the clamping ring (12); a bolt column (253) is arranged in the hole groove (252); the bolt column (253) is arranged parallel to the central axis of the hole groove (252); a column sleeve (131) is arranged on the plug (13) corresponding to the bolt column (253); and the column sleeve (131) can be sleeved on the circumference of the bolt column (253).

9. The high-speed neck hanging fan according to claim 1, characterized in that: The air inlet (223) is covered with an air inlet cover (21).

10. The high-speed neck hanging fan according to claim 1, characterized in that: The two ends of the neck hanging piece (1) are respectively connected to a fan body (2), wherein a circuit board assembly (26) is arranged in a coordination base (222) in one fan body (2), and a fan blade assembly (23) in its air duct (221) is electrically connected to the circuit board assembly (26), and a storage battery (27) is arranged in the coordination base (222) in the other fan body (2), and the storage battery (27) and the fan blade assembly (23) in the same fan body (2) are electrically connected to the circuit board assembly (26) through internal wiring of the neck hanging piece (1).

11. A high-speed neck hanging fan according to claim 10, characterized in that: The circuit board assembly (26) is electrically connected and provided with a control button (261), a USB interface (262) and a light-emitting lamp bead (263); the control button (261), the USB interface (262) and the light-emitting lamp bead (263) are all arranged in a through hole preset in a shell of the coordination base (222); and a heat insulation pad (28) is sandwiched between the battery (27) and a wall surface of the coordination base (222) on a side away from the air duct (221).

12. A high-speed neck hanging fan according to any one of claims 1, 8 and 10, characterized in that: The neck hanging piece (1) is a deformable serpentine tube.

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