CN117167319A

CN117167319A - Blade assembly and neck hanging fan

Info

Publication number: CN117167319A
Application number: CN202311128559.8A
Authority: CN
Inventors: 林洁
Original assignee: Shenzhen Yupin Technology Co ltd
Current assignee: Shenzhen Yupin Technology Co ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2023-12-05

Abstract

The application provides a blade assembly and a neck hanging fan, and relates to the field of fans. The blade assembly includes a base plate, a plurality of first blades, and a plurality of second blades; the bottom plate is provided with a central shaft and is used for being coaxially connected with an output shaft of the driving mechanism, and the first surface of the bottom plate is connected with a plurality of first blades and a plurality of second blades; the plurality of first blades are uniformly distributed around the central shaft, the first blades are provided with air outlet surfaces, and the air outlet surfaces of the plurality of first blades are distributed around the first direction; the plurality of second blades are evenly distributed on the inner sides of the plurality of first blades around the central shaft, the second blades are provided with wind guiding surfaces, and the wind guiding surfaces of the plurality of second blades are distributed around the first direction. The application can reduce the noise of the blade assembly and improve the use experience of a user.

Description

Blade assembly and neck hanging fan

Technical Field

The application relates to the field of fans, in particular to a blade assembly and a neck hanging fan.

Background

The neck hanging fan is a common fan, and can release hands of a user while achieving air supply requirements. The blade assembly is an important component of the neck hanging fan and can rotate under the drive of the motor, so that the blade assembly is used for supplying air to a user; however, when the blade assembly is in the working state, the noise of the blade assembly is large, and the use experience of a user is affected.

Disclosure of Invention

The embodiment of the application provides a blade assembly and a neck hanging fan, which are used for solving the problem that the noise of the blade assembly is large and the use experience of a user is affected.

The embodiment of the application provides a blade assembly, which comprises a bottom plate, a plurality of first blades and a plurality of second blades;

the bottom plate is provided with a central shaft and is used for being coaxially connected with an output shaft of the driving mechanism, and the first surface of the bottom plate is connected with the plurality of first blades and the plurality of second blades;

the plurality of first blades are uniformly distributed around the central shaft, the first blades are provided with air outlet surfaces, and the air outlet surfaces of the plurality of first blades are distributed around a first direction;

the plurality of second blades are uniformly distributed on the inner sides of the plurality of first blades around the central shaft, the second blades are provided with wind guiding surfaces, and the wind guiding surfaces of the plurality of second blades are distributed around the first direction.

By adopting the technical scheme, when the blade assembly is in a working state, the driving mechanism drives the bottom plate to rotate through the output shaft, so that the plurality of first blades on the first surface of the bottom plate rotate around the central shaft along the first direction, and air flow is generated by using the air outlet surfaces of the plurality of first blades;

And a plurality of second blades arranged on the inner sides of a plurality of first blades rotate around the central shaft along the first direction, the air guide surfaces of the plurality of second blades can play a certain adjusting role on the air flow on the inner sides of the plurality of first blades, the possibility of turbulent flow generated on the inner sides of the plurality of first blades is reduced, and therefore noise of the blade assembly is reduced, and the use experience of a user is improved.

In some possible embodiments, the air outlet surface of the first blade is a concave air outlet surface, and takes a plane perpendicular to the central axis as a cross section, and the cross section area of the first blade gradually decreases along a direction away from the bottom plate;

and/or the wind guide surface of the second blade is a concave wind guide surface, the plane perpendicular to the central shaft is taken as a cross section, and the cross section area of the second blade is gradually reduced along the direction deviating from the bottom plate.

In some possible embodiments, a side of the first blade facing away from the central axis is perpendicular to the base plate, and a side of the first blade facing away from the central axis is gradually distant from the central axis in a direction facing away from the base plate;

one side of the second blade, which is away from the central shaft, is perpendicular to the bottom plate, and one side of the second blade, which is close to the central shaft, is gradually far away from the central shaft along the direction away from the bottom plate.

In some possible embodiments, the base plate is provided with a mounting portion provided on a first surface of the base plate;

the installation part is coaxial set up in the center pin, the installation part sets up in the inboard of a plurality of first blades, the installation part is connected a plurality of second blades.

In some possible embodiments, the first surface of the base plate is provided with an annular wind guiding portion, the annular wind guiding portion connecting the plurality of first blades, the annular wind guiding portion being inclined toward the protruding portion;

and/or the mounting part is provided with an inner concave surface, and the inner concave surface is connected with the plurality of second blades.

In some possible embodiments, the blade assembly further comprises a plurality of third blades disposed on the second surface of the base plate;

the bottom plate is provided with a vent hole, a first end of the vent hole is communicated with the first surface of the bottom plate, and a second end of the vent hole is communicated with the second surface of the bottom plate;

at least one of the plurality of first blades, the plurality of second blades, and the plurality of third blades is provided as a plastic fiberized blade.

In some possible embodiments, in the first direction, the air outlet surface of the first blade is disposed obliquely toward the bottom plate;

And/or, in the first direction, the wind guide surface of the second blade is obliquely arranged towards the bottom plate.

The embodiment of the application also provides a neck hanging fan, which comprises a main body, a driving mechanism and any blade assembly;

the main body is provided with an accommodating cavity which accommodates the blade assembly;

the driving mechanism is arranged on the main body, an output shaft of the driving mechanism is at least partially arranged in the accommodating cavity, and the output shaft of the driving mechanism is coaxially connected with the bottom plate.

In some possible embodiments, the drive mechanism comprises a control board, and cooperating stator and mover assemblies;

the control board set up in the main part, the control board electricity is connected stator module with the runner subassembly, the runner subassembly cover is located stator module, just the runner subassembly forms actuating mechanism's output shaft.

In some possible embodiments, the drive mechanism further comprises a hall sensor electrically connected to the control board, and the hall sensor is oriented toward the mover assembly.

In some possible embodiments, the mover assembly includes a magnet and a stationary ring, the magnet being rotatably disposed outside the stator assembly about the first direction;

the fixed ring is sleeved on the outer surface of the magnet, the inner side of the fixed ring is connected with the magnet, and the outer side of the fixed ring is connected with the second surface of the bottom plate.

In some possible embodiments, a first space is formed between the hall sensor and the magnet in the first direction, the first space having a width greater than or equal to 0.4 mm and less than or equal to 2.1 mm;

and/or a second interval is formed between the Hall sensor and the inner surface of the magnet in the radial direction of the magnet, and the width of the second interval is greater than or equal to 0.5 millimeter and less than or equal to 1.8 millimeter.

In some possible embodiments, the neck fan further comprises a battery module electrically connected to the driving mechanism;

The battery module comprises a battery core and a battery protection board, wherein the battery core comprises an anode and a cathode;

the battery protection plate comprises a switching element and a control piece, a first end of the switching element is electrically connected with the positive electrode, and a second end of the switching element is electrically connected with the negative electrode;

the control piece is electrically connected with the switching element to control the on-off between the first end of the switching element and the second end of the switching element; the control includes one or more of an overcharge protection element, an overdischarge protection element, a temperature protection element, and an overcurrent protection element.

In some possible embodiments, the battery module further comprises a connecting piece, the connecting piece comprises a buffer part and a contact part which are connected, the buffer part is arranged on the battery protection plate, and one end of the buffer part, which is away from the battery protection plate, is connected with the contact part;

the contact portion is arranged in parallel to the battery protection plate, the contact portion faces towards the surface of the battery protection plate and is arranged at intervals with the battery protection plate, and the contact portion faces away from the surface of the battery protection plate and is abutted to the positive electrode or the negative electrode.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic view of a vane assembly according to an embodiment of the present application;

FIG. 2 is a schematic view of a blade assembly according to another embodiment of the present application;

FIG. 3 is a schematic view of the blade assembly of FIG. 2 from another perspective provided by an embodiment of the present application;

fig. 4 is a perspective exploded view of a neck-hanging fan according to an embodiment of the present application, in which air inlets may be provided on both inner and outer side walls corresponding to the same fan assembly;

FIG. 5 is an exploded view of a portion of the neckline fan assembly of FIG. 4 according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a main body and an air duct according to an embodiment of the present application;

fig. 7 is a schematic view of a part of a driving mechanism according to an embodiment of the present application;

FIG. 8 is a cross-sectional view of a portion of the structure of a drive mechanism provided by an embodiment of the present application;

fig. 9 is a cross-sectional view showing a part of the structure of a driving mechanism of another embodiment provided by an example of the present application;

fig. 10 is a schematic structural view of a driving mechanism according to another embodiment of the present application;

FIG. 11 is a cross-sectional view showing a part of the structure of a driving mechanism according to another embodiment of the present application;

FIG. 12 is a cross-sectional view showing a part of the structure of a driving mechanism according to another embodiment of the present application;

Fig. 13 is a schematic structural view of a driving mechanism according to another embodiment of the present application;

fig. 14 is a cross-sectional view showing a part of the structure of a driving mechanism of another embodiment provided by an example of the present application;

fig. 15 is a schematic structural view of a battery module according to an embodiment of the present application.

Reference numerals illustrate:

100. a blade assembly;

110. a bottom plate; 111. an annular air guide part; 112. a vent hole; 113. a mounting part; 120. a first blade; 130. a second blade; 140. a third blade;

200. a main body;

210. an inner sidewall; 220. an outer sidewall; 230. a connecting wall; 240. a receiving chamber; 250. an air duct; 260. an air inlet; 270. an air outlet;

300. a driving mechanism;

310. a control board; 311. a positioning groove; 320. a hall sensor; 321. a connection terminal; 330. a stator assembly; 331. a metal body; 332. a coil winding; 333. a plastic frame; 340. a mover assembly; 341. a magnet; 342. a fixing ring; 350. a bearing; 351. a silica gel ring;

400. a battery module;

410. a battery cell; 420. a battery protection plate; 421. a switching element; 422. a control member; 423. a connecting piece; 4231. a buffer section; 4232. and a contact portion.

Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

As described in the background art, the blade assembly is an important component of the neck fan, and includes a plurality of blades uniformly arranged around a central axis, and the plurality of blades can be rotated under the driving of the motor, so that a plurality of blades can be used for supplying air to a user; however, when the blade assembly is in the working state, turbulence is easily generated on the inner sides of the plurality of blades, so that the noise of the blade assembly is large, and the use experience of a user is affected.

In order to solve the technical problems, the embodiment of the application provides a blade assembly and a neck hanging fan, wherein the blade assembly comprises a bottom plate, a plurality of first blades and a plurality of second blades, the first blades and the second blades are arranged on the first surface of the bottom plate, the second blades are arranged on the inner sides of the first blades, when the blade assembly is in a working state, a driving mechanism drives the bottom plate to rotate through an output shaft, so that the first blades on the first surface of the bottom plate rotate around a central shaft along a first direction, and air flow is generated by using the air outlet surfaces of the first blades;

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.

The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Referring to fig. 1-3, an embodiment of the present application provides a blade assembly 100 including a base plate 110, a plurality of first blades 120, and a plurality of second blades 130; wherein the base plate 110 has a central axis, and the base plate 110 is configured to be coaxially connected to an output shaft of the driving mechanism 300; illustratively, the base plate 110 may have a first surface and a second surface opposite the first surface, the first surface of the base plate 110 connecting the plurality of first blades 120 and the plurality of second blades 130, the second surface of the base plate 110 for connecting an output shaft of the drive mechanism 300.

Illustratively, the plurality of first blades 120 are uniformly arranged around the central axis, the first blades 120 have air-out surfaces, and the air-out surfaces of the plurality of first blades 120 are arranged around the first direction; the plurality of second blades 130 are uniformly arranged on the inner sides of the plurality of first blades 120 around the central axis, the second blades 130 have wind guiding surfaces, and the wind guiding surfaces of the plurality of second blades 130 are arranged around the first direction, that is, the arrangement direction of the plurality of second blades 130 is the same as the arrangement direction of the plurality of first blades 120, so as to reduce the possibility of turbulence generated on the inner sides of the plurality of first blades 120 through the plurality of second blades 130.

It should be noted that the first direction may be set to a clockwise direction, or the first direction may also be set to a counterclockwise direction; the air outlet surfaces of the plurality of first blades 120 are arranged around the first direction, and may be configured such that the air outlet surfaces of the plurality of first blades 120 face the first direction.

Referring to fig. 1 to 3, in some possible embodiments, the base plate 110 may be provided as a circular base plate 110, the base plate 110 may be provided with a mounting portion 113, the mounting portion 113 is provided on a first surface of the base plate 110, the mounting portion 113 is coaxially provided on a central axis, the mounting portion 113 is provided inside the plurality of first blades 120, and the mounting portion 113 is connected to the plurality of second blades 130 to connect the plurality of second blades 130 through the mounting portion 113.

In the thickness direction of the bottom plate 110, the height of the mounting portion 113 may be smaller than the height of the first blade 120, the mounting portion 113 may be integrally formed on the bottom plate 110, the center of the first surface of the bottom plate 110 is convexly disposed, the center of the second surface of the bottom plate 110 is concavely disposed, so as to form the mounting portion 113, and the center of the second surface of the bottom plate 110 may be used to connect with an output shaft of the driving mechanism 300, so that the driving mechanism 300 drives the blade assembly 100 to rotate through the output shaft.

It should be noted that, in the thickness direction of the base plate 110, an end of the second blade 130 facing away from the base plate 110 may be disposed flush with an end of the first blade 120 facing away from the base plate 110, that is, a length of the second blade 130 in the thickness direction of the base plate 110 is smaller than a length of the first blade 120 in the thickness direction of the base plate 110.

For example, the first surface of the base plate 110 may be provided with an annular wind guiding part 111, the annular wind guiding part 111 is connected to the plurality of first blades 120, the annular wind guiding part 111 is inclined toward the boss, i.e., an inner side of the annular wind guiding part 111 is concavely disposed with respect to an outer side of the annular wind guiding part 111 to connect the plurality of first blades 120 through the annular wind guiding part 111, thereby improving the wind-out effect of the first blades 120 through the annular wind guiding part 111; and/or, the mounting part 113 may be provided with an inner concave surface connected to the plurality of second blades 130, thereby improving the air outlet effect of the second blades 130 through the inner concave surface.

Referring to fig. 1-3, in some possible embodiments, the air outlet surface of the first blade 120 may be configured as a concave air outlet surface, and the cross-sectional area of the first blade 120 gradually decreases in a direction away from the base plate 110 with a plane perpendicular to the central axis as a cross-section; for example, a side of the first blade 120 facing away from the central axis may be perpendicular to the base plate 110, and a side of the first blade 120 facing toward the central axis may be gradually distant from the central axis in a direction facing away from the base plate 110;

and/or, the wind guiding surface of the second blade 130 may be configured as a concave wind guiding surface, with a plane perpendicular to the central axis as a cross section, and the cross-sectional area of the second blade 130 gradually decreases in a direction away from the base plate 110. For example, a side of the second blade 130 facing away from the central axis may be perpendicular to the base plate 110, and a side of the second blade 130 facing toward the central axis may be gradually distant from the central axis in a direction facing away from the base plate 110.

By adopting the above technical solution, when the air outlet surface of the first blade 120 is set as the concave air outlet surface, and the air guiding surface of the second blade 130 is set as the concave air guiding surface; when the blade assembly 100 is in a working state, the driving mechanism 300 drives the bottom plate 110 to rotate through the output shaft, the plurality of first blades 120 rotate around the central shaft along the first direction, and the air outlet surface of the first blades 120 is set to be a concave air outlet surface, so that the air outlet quantity of the first blades 120 is increased, and the air outlet effect of the first blades 120 is improved; and, taking the plane perpendicular to the central axis as a cross section, the cross-sectional area of the first blades 120 gradually decreases in a direction away from the bottom plate 110, reducing the possibility of turbulence inside the plurality of first blades 120;

In addition, the air guiding surface of the second blade 130 is set to be the concave air guiding surface, so that the air output of the second blade 130 is increased, the possibility of turbulence generated inside the plurality of first blades 120 is further reduced, and the noise of the blade assembly 100 is reduced; and, taking a plane perpendicular to the central axis as a cross section, the cross-sectional area of the second blades 130 gradually decreases in a direction away from the bottom plate 110, reducing the possibility of turbulence inside the plurality of second blades 130.

Illustratively, in the first direction, the air outlet face of the first blade 120 is disposed obliquely toward the base plate 110; and/or, in the first direction, the wind guiding surface of the second blade 130 is disposed obliquely toward the base plate 110.

It should be noted that, by setting the air outlet surface of the first blade 120 to incline toward the bottom plate 110, the air guiding surface of the second blade 130 is set to incline toward the bottom plate 110, so as to increase the air outlet volumes of the first blade 120 and the second blade 130, and improve the air outlet effect of the blade assembly 100.

Referring to fig. 1-3, in some possible embodiments, the blade assembly 100 may further include a plurality of third blades 140, the plurality of third blades 140 disposed on the second surface of the base plate 110; illustratively, the base plate 110 is further provided with a vent 112, a first end of the vent 112 is in communication with the first surface of the base plate 110, and a second end of the vent 112 is in communication with the second surface of the base plate 110, such that air flow generated by the plurality of third blades 140 is able to flow from the second surface of the base plate 110 to the first surface of the base plate 110 through the vent 112, thereby increasing the air output of the blade assembly 100.

It is easy to understand that, in the thickness direction of the base plate 110, the plurality of third blades 140 may be disposed corresponding to the plurality of first blades 120, and the shape and arrangement of the third blades 140 may be the same as those of the first blades 120, so that the plurality of first blades 120 and the plurality of third blades 140 cooperate to realize the air outlet process of the blade assembly 100.

In some possible embodiments, at least one of the plurality of first blades 120, the plurality of second blades 130, and the plurality of third blades 140 is provided as a plastic fiberized blade to make the structure of the blade assembly 100 more stable.

In summary, when the blade assembly 100 is in the working state, the driving mechanism 300 drives the bottom plate 110 to rotate through the output shaft, so that the plurality of first blades 120 on the first surface of the bottom plate 110 rotate around the central axis along the first direction, and the air flow is generated by using the air outlet surfaces of the plurality of first blades 120;

in addition, the plurality of second blades 130 disposed inside the plurality of first blades 120 rotate around the central axis along the first direction, and the air guiding surfaces of the plurality of second blades 130 can play a certain role in adjusting the air flow inside the plurality of first blades 120, so that the possibility of turbulence generated inside the plurality of first blades 120 is reduced, the noise of the blade assembly 100 is reduced, and the user experience is improved.

Referring to fig. 4-6, the embodiment of the present application further provides a neck-hanging fan, which includes a main body 200, a driving mechanism 300, and the blade assembly 100 according to any of the foregoing embodiments; wherein, the main body 200 is provided with a containing cavity 240, and the containing cavity 240 contains the blade assembly 100; the driving mechanism 300 is disposed on the main body 200, and an output shaft of the driving mechanism 300 is at least partially disposed in the accommodating cavity 240, and the output shaft of the driving mechanism 300 is coaxially connected to the base plate 110, so as to drive the blade assembly 100 to rotate through the driving mechanism 300.

For example, the main body 200 may include an inner sidewall 210, an outer sidewall 220, and a connecting wall 230 sandwiched between the inner sidewall 210 and the outer sidewall 220, and it should be noted that the inner sidewall 210, the outer sidewall 220, and the connecting wall 230 are not limited to the shape of the main body 200, and may be polygonal, cylindrical, or irregular, or the main body 200 may also include multiple layers of inner sidewall 210, outer sidewall 220, and connecting wall 230 that cooperate with each other to control noise, air intake and efficiency, and the like.

An air duct 250 may be further formed in the main body 200, and the air duct 250 is connected to the accommodating cavity 240, so that wind generated by the blade assembly 100 is discharged through the air duct 250; the width of the air channel 250 (i.e., w1 in the figure) is adapted to the width of the first blade 120 (i.e., w2 in the figure), for example, the width of the air channel 250 and the width of the first blade 120 may be substantially the same. Alternatively, the width of the air duct 250 may be smaller than the width of the first blade 120, so that the air entering the air duct 250 can be discharged out of the air duct 250 after being pressurized by the air duct 250, thereby improving the air outlet effect of the neck hanging fan.

The neck hanging main body 200 can be further provided with an air outlet 270, and the air outlet 270 can be communicated with one end of the air duct 250, which is away from the accommodating cavity 240; the air outlet 270 may include an elongated air outlet 270 extending along a length direction of the main body 200, and/or the air outlet 270 may include a dense air outlet 270 extending along a width direction of the main body 200, and a central axis of the elongated air outlet 270 is matched with a central axis of the main body 200 in parallel as a whole. The embodiment of the application is matched in parallel on the whole, does not refer to absolute parallelism, but basically approximates parallelism or is substantially parallel, so that the air guiding effect of air guiding and air outlet can be realized.

Referring to fig. 7-14, in some possible embodiments, the drive mechanism 300 may include a control board 310, and cooperating stator assembly 330 and mover assembly 340; the control board 310 may be disposed on the main body 200, for example, the control board 310 may be disposed in the accommodating cavity, the control board 310 is electrically connected with the stator assembly 330 and the rotor assembly 340, the rotor assembly 340 is sleeved on the stator assembly 330, the rotor assembly 340 forms an output shaft of the driving mechanism 300, and the rotor assembly 340 is connected with the second surface of the base plate 110, so that the rotor assembly 340 drives the blade assembly 100 to rotate.

Illustratively, the driving mechanism 300 further includes a hall sensor 320, the hall sensor 320 is electrically connected to the control board 310, and the hall sensor 320 faces the mover assembly 340 to obtain the rotational speed of the mover assembly 340 through the hall sensor 320. The hall sensor 320 may be provided with a connection terminal 321, and the connection terminal 321 may be electrically connected to the control board 310 by means of a patch, an insert, and/or a weld, so that the hall sensor 320 is electrically connected to the control board 310 through the connection terminal 321.

It should be noted that, the hall sensor 320 of the present application preferably adopts a semiconductor material and a semiconductor device with better hall effect performance, and in this way, the hall sensor 320 of the present application has the advantages of sensitivity to magnetic fields, simple structure, small volume, wide frequency response, large output voltage variation, long service life, etc., so that the rotation speed of the neck fan of the present application can be accurately measured.

Specifically, the present application controls the current through both ends of the semiconductor sheet (not shown) of the hall sensor 320, and applies a uniform magnetic field in the vertical direction of the semiconductor sheet, so as to generate a hall potential in the direction perpendicular to the current and the magnetic field, and achieves precise control by setting and adjusting the hall constant, bias current, magnetic field strength, and thickness of the semiconductor material of the hall sensor 320 therein, thereby further reducing noise.

Compared with other types of rotation speed sensors, the Hall sensor 320 has high precision and good linearity, and the Hall sensor 320 can sense the rotation process of the rotor assembly 340 according to the Hall effect of the semiconductor, so that the rotation speed of the rotor assembly 340 is obtained.

Referring to fig. 7, the control board 310 may be provided with a positioning slot 311, at least a portion of the hall sensor 320 is embedded in the positioning slot 311, and a plane in which the positioning slot 311 is located may be generally parallel to a plane in which the motor driving board is located, so as to increase a wind-receiving heat dissipation area of the hall sensor 320.

The positioning groove 311 may penetrate through the control board 310 in the thickness direction of the control board 310; alternatively, the positioning slot 311 may not penetrate the control board 310; alternatively, the positioning groove 311 may be formed by providing a groove after the gasket is provided on the control board 310 or by forming a groove by using an adhesive, which is not limited in the embodiment of the present application.

For example, at least one of the inner sidewall 210, the outer sidewall 220 and the connecting wall 230 is provided with an air inlet 260 communicated with the accommodating cavity 240, the air inlet 260 faces the hall sensor 320, so as to improve the heat dissipation effect of the hall sensor 320 through the air inlet 260, for example, the air inlet direction of the air inlet 260 may be perpendicular to the plane of the positioning slot 311, so as to dissipate heat of the hall sensor 320 through the air from the air inlet 260, and reduce the possibility of misalignment of the hall sensor 320 due to temperature rise.

It should be noted that, the control board 310 and the positioning slot 311 thereon may be adjusted at a small angle according to the air inlet and the air outlet, at this time, a certain acute included angle exists between the positioning slot 311 and the air inlet direction of the hall sensor 320 and the air inlet 260, and the acute included angle does not affect the increase of the air-receiving heat-dissipating area of the hall sensor 320 as a whole, so this situation still belongs to the situation of being basically vertical as a whole, and those skilled in the art should not understand that 90 ° vertical limitation is necessary, especially, there are also assembly errors and process errors in addition.

Or, the air inlet direction of the air inlet 260 may be parallel to the plane where the positioning slot 311 is located, it should be noted that, the control board 310 and the positioning slot 311 thereon may be adjusted at a small angle according to the air inlet and the air outlet, at this time, a certain acute included angle exists between the positioning slot 311 and the air inlet direction of the hall sensor 320 and the air inlet 260, and the acute included angle does not affect the increase of the air-receiving heat-dissipating area of the hall sensor 320 as a whole, so this situation still belongs to the situation of being basically parallel as a whole, and those skilled in the art should not understand that the situation must be completely parallel, especially there are complex situations of assembly errors and process errors, etc., and the situation is basically parallel as a whole.

The relative positions of the control board 310, the stator assembly 330, the mover assembly 340 and the hall sensor 320 of the drive mechanism 300 are described below in connection with fig. 7-14.

In some possible embodiments, the stator assembly 330 may include a metal body 331, a coil winding 332, and a plastic frame 333 for dividing the metal body 331 and the coil winding 332; the metal body 331 may be formed by stacking 6 to 20 metal sheets with a thickness of 0.2 to 0.8 mm, and the coil winding 332 is electrically connected to the control board 310.

For example, 8 to 10 metal sheets can be stacked to form the metal body 331, and the thickness of the metal sheets can be set to 0.35 mm or 0.5 mm, so as to realize seamless connection control of the rotation speed, improve the shaking performance of the neck hanging fan product, realize better rotation speed control and rotation speed switching, and reduce the possibility of shaking and the like.

The mover assembly 340 may include a magnet 341 and a fixed ring 342, the magnet 341 being rotatably disposed at an outer side of the stator assembly 330 about a first direction; the fixed ring 342 is sleeved on the outer surface of the magnet 341, the inner side of the fixed ring 342 is connected to the magnet 341, and the outer side of the fixed ring 342 is connected to the second surface of the base plate 110, so that the magnet 341 drives the blade assembly 100 to rotate around the first direction through the fixed ring 342 under the action of the stator assembly 330.

In addition, the driving mechanism 300 may further include a bearing 350, a silicone ring 351 disposed at one or both ends of the bearing 350, so as to enable the rotation process of the rotor assembly 340 relative to the stator assembly 330 to be smoother, and the specific arrangement of the bearing 350 is not limited in this embodiment of the present application.

In the first direction, a first interval (i.e., S1 in the drawing) is formed between the hall sensor 320 and the magnet 341, and the first interval has a width of greater than or equal to 0.4 mm and less than or equal to 2.1 mm, and may refer to a distance value of a closest point of the hall sensor 320 and the mover assembly 340, for example, a distance value of an end plane of the hall sensor 320 and the mover assembly 340, or a distance value of an arc surface of the hall sensor 320 and the mover assembly 340.

For example, the width of the first interval may be set to one of 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 1.8 mm and 2.1 mm, so that on the basis of meeting the requirement of lightening and thinning of the neck hanging fan and realizing high-precision detection of the hall sensor 320, the possibility that the hall sensor 320 and the mover assembly 340 are scratched, damaged and the like is reduced under the use background that the flexibility of the neck hanging fan structure allows extrusion and bending deformation.

And/or, a second interval (i.e., S2 in the drawing) is formed between the hall sensor 320 and the inner surface of the magnet 341 in the radial direction of the magnet 341, and the second interval has a width of greater than or equal to 0.5 mm and less than or equal to 1.8 mm, and the second interval may refer to a distance value of the closest point of the hall sensor 320 and the mover assembly 340, for example, the second interval may refer to a distance value of the hall sensor 320 and an end plane of the mover assembly 340, or a distance value of the hall sensor 320 and an arc surface of the mover assembly 340.

For example, the width of the second interval may be set to one of 0.5 mm, 0.8 mm, 1 mm, 1.5 mm and 1.8 mm, so that on the basis of meeting the light and thin requirements of the neck hanging fan and realizing high-precision detection of the hall sensor 320, the possibility of scraping, damage and the like of the hall sensor 320 and the mover assembly 340 is reduced under the use background that the flexibility of the neck hanging fan structure allows extrusion, bending and deformation.

Referring to fig. 3, in some possible embodiments, the drive mechanism 300 may further include a rotating shaft, in an axial direction along the rotating shaft: the thickness of the hall sensor 320 (i.e., d1 in the drawing) may be less than or equal to the depth of the positioning groove 311 (i.e., e1 in the drawing) to receive the hall sensor 320 in the positioning groove 311; the connection terminal 321 of the hall sensor 320 may penetrate through the sidewall of the positioning groove 311 and be electrically connected to the control board 310, or the connection terminal 321 of the hall sensor 320 may also extend to the outside of the positioning groove 311 and be electrically connected to the control board 310.

Referring to fig. 7 to 14, when the hall sensor 320 is located in the space surrounded by the magnet 341, a first or second operation interval between the hall sensor 320 and the magnet 341 is greater than or equal to 0.4 mm and less than or equal to 2.1 mm in the radial direction of the magnet 341; when one end of the hall sensor 320 is not located in the space surrounded by the magnet 341, the first or second interval between the hall sensor 320 and the magnet 341 is greater than or equal to 0.5 mm and less than or equal to 1.8 mm in the axial direction of the magnet 341.

Or, in the axial direction of the rotating shaft, the thickness of the hall sensor 320 can be larger than the depth of the positioning groove 311 and at least partially protrudes to the outer side of the positioning groove 311, so that the hall sensor 320 can be clamped for welding and positioning during assembly, the installation process of the hall sensor 320 is more convenient, and the assembly efficiency of the neck hanging fan is improved; the connection terminal 321 of the hall sensor 320 may penetrate through the sidewall of the positioning groove 311 and be electrically connected to the control board 310, or the connection terminal 321 of the hall sensor 320 may also extend to the outside of the positioning groove 311 and be electrically connected to the control board 310.

It is easy to understand that the hall sensor 320 may also be embedded into the positioning slot 311, so that the whole can be modularly customized, and the possibility of loosening the hall sensor 320 due to scraping of the hall sensor 320 can be reduced.

Referring to fig. 4 and 15, in some possible embodiments, the neck fan may further include a battery module 400, and the battery module 400 is electrically connected to the driving mechanism 300 to supply power to the driving mechanism 300 through the battery module 400.

Referring to fig. 15, an exemplary battery module 400 includes a battery cell 410 and a battery protection plate 420, wherein the battery cell 410 includes a positive electrode and a negative electrode to implement a charge and discharge process through the positive electrode and the negative electrode; the battery cell 410 may be columnar or polyhedral, and the battery cell 410 includes two end surfaces disposed opposite to each other, and a side surface connecting the two end surfaces; the positive electrode and the negative electrode of the battery cell 410 may be located on two end surfaces, respectively, or the positive electrode and the negative electrode of the battery cell 410 may also be located on the same end surface, which is not limited in the embodiment of the present application.

The battery protection plate 420 includes a switching element 421 and a control member 422, wherein a first end of the switching element 421 is electrically connected to the positive electrode, and a second end of the switching element 421 is electrically connected to the negative electrode; the control member 422 is electrically connected with the switching element 421 to control the on-off between the first end of the switching element 421 and the second end of the switching element 421, so that the protection process of the battery cell 410 is realized through the battery protection plate 420, and the possibility of damage to the battery cell 410 is reduced; illustratively, the control 422 includes one or more of an overcharge protection element, an overdischarge protection element, a temperature protection element, and an overcurrent protection element to enable on-off control between the positive and negative poles of the cell 410 under different conditions.

The battery protection board 420 may be formed by combining a rigid printed circuit board and a flexible printed circuit board, and the battery protection board 420 may be further provided with a charging control circuit, a precharge circuit, an electricity meter circuit, and a battery equalization circuit, and the battery protection board 420 in the embodiment of the present application has a power-off function, and may also perform communication control with a control circuit board of the neck fan, etc.

The switch element 421 can be a metal belt or a wire, and the switch element 421 can be bent and shaped at will, so that the installation process of the switch element 421 is more convenient, and the shape of the switch element 421 can be correspondingly matched with the shape of the end face or the side face of the battery cell 410 to be a circle or a polygon;

when the positive electrode and the negative electrode of the battery cell 410 are respectively located on the two end surfaces, the partial switching element 421 may be disposed corresponding to the end surface where the positive electrode is located, the partial switching element 421 connected to the negative electrode extends to the end surface where the positive electrode is located, or the partial switching element 421 may be disposed corresponding to the end surface where the negative electrode is located, and the partial switching element 421 connected to the positive electrode extends to the end surface where the negative electrode is located; when the positive electrode and the negative electrode of the battery cell 410 are located on the same end face, the switch element 421 may be disposed opposite to the end face where the positive electrode and the negative electrode are located, which is not described in detail in the embodiment of the present application.

The battery module 400 may further include a connection member 423, where the connection member 423 includes a buffer portion 4231 and a contact portion 4232 connected to each other, the buffer portion 4231 may be disposed on the switching element 421 of the battery protection plate 420, and one end of the buffer portion 4231 facing away from the battery protection plate 420 is connected to the contact portion 4232; the contact portions 4232 are disposed in parallel to the battery protection plate 420, the surface of the contact portions 4232 facing the battery protection plate 420 is disposed at intervals from the battery protection plate 420, and the surface of the contact portions 4232 facing away from the battery protection plate 420 is abutted against the positive electrode or the negative electrode, so that the electrical connection between the switching element 421 and the positive electrode and the negative electrode of the battery cell 410 is more stable.

The switching element 421 may have a b+ port, a B-port, a p+ port, and a P-port, the positive electrode of the battery cell 410 is electrically connected to the b+ port, the negative electrode of the battery cell 410 is electrically connected to the B-port, and the p+ port and the P-port may be connected to the outside through wires or the like, so that the battery cell 410 supplies power to the outside and/or charges the battery cell 410 from the outside.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can lead the connection between the two elements or the interaction relationship between the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A vane assembly comprising a base plate, a plurality of first vanes and a plurality of second vanes;

2. The blade assembly of claim 1, wherein the air outlet face of the first blade is configured as a concave air outlet face, the cross-sectional area of the first blade decreasing in a direction away from the base plate with a plane perpendicular to the central axis as a cross-section;

3. The blade assembly of claim 2, wherein a side of the first blade facing away from the central axis is perpendicular to the base plate, and a side of the first blade facing away from the central axis is progressively farther from the central axis in a direction facing away from the base plate;

4. A blade assembly according to any one of claims 1-3, wherein the base plate is provided with a mounting portion, which mounting portion is provided at the first surface of the base plate;

5. The blade assembly of claim 4, wherein the first surface of the base plate is provided with an annular wind guide portion connecting the plurality of first blades, the annular wind guide portion being inclined toward the boss;

6. The blade assembly of claim 4, further comprising a plurality of third blades disposed on the second surface of the base plate;

7. The blade assembly of claim 1, wherein in the first direction, the air outlet face of the first blade is disposed obliquely toward the base plate;

8. A neck fan comprising a main body, a drive mechanism, and a blade assembly as claimed in any one of claims 1 to 7;

9. The neck fan of claim 8, wherein the drive mechanism comprises a control board, and a stator assembly and a mover assembly that cooperate;

10. The neck fan of claim 9, wherein the drive mechanism further comprises a hall sensor electrically connected to the control board, and wherein the hall sensor is oriented toward the mover assembly.

11. The neck fan of claim 10, wherein the mover assembly includes a magnet and a stationary ring, the magnet being rotatably disposed outside of the stator assembly about the first direction;

12. The neck-hanging fan according to claim 11, wherein a first space is formed between the hall sensor and the magnet in the first direction, and a width of the first space is greater than or equal to 0.4 mm and less than or equal to 2.1 mm;

13. The necktie fan of any one of claims 8-12, further comprising a battery module electrically connected to the drive mechanism;

14. The neck hanging fan according to claim 13, wherein the battery module further comprises a connecting piece, the connecting piece comprises a buffer part and a contact part which are connected, the buffer part is arranged on the battery protection plate, and one end of the buffer part, which is away from the battery protection plate, is connected with the contact part;