CN220248387U

CN220248387U - Portable fan

Info

Publication number: CN220248387U
Application number: CN202320027723.5U
Authority: CN
Inventors: 郑观正; 高海峻; 袁水勇; 阳应该; 肖馨
Original assignee: Shenzhen Jisu Technology Co Ltd
Current assignee: Shenzhen Jisu Technology Co Ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-12-26
Anticipated expiration: 2033-01-04

Abstract

The utility model provides a portable fan, comprising: the shell is provided with an air inlet, a containing cavity and an air outlet which are communicated, and also comprises a base and a hollow sleeve protruding from the base to the containing cavity; the fan assembly is accommodated in the shell and comprises a hub and a plurality of fan blades arranged on the outer surface of the hub at intervals, and a rotating shaft is fixed in the center of the inner side of the hub; the motor comprises a stator and a rotor, wherein the stator and the rotor are both accommodated in the hub, the stator is sleeved outside the sleeve, the stator comprises a coil, the rotor is radially arranged between the stator and the hub, and the rotating shaft is inserted in the sleeve; the driving circuit board is not arranged between the base and the stator, and is electrically connected with the lead wires of the coil so as to drive the fan assembly to rotate, and wind is blown out from the air outlet after passing through the accommodating cavity from the air inlet.

Description

Portable fan

Technical Field

The utility model relates to the technical field of fans, in particular to a small portable fan.

Background

The fan is used as a household appliance very commonly used in daily life of people, and the fan drives air to flow so as to achieve the purpose of radiating heat for people. The current portable fans are popular because of light weight and portability, and the portable fans require the products to be as small in overall height and small in size as possible.

In the existing design production process on the market, the applied brushless three-phase motor has a stator and a PCB (printed circuit board) in the motor connected in a manner that: the motor stator skeleton is gone up around having the coil group, forms motor stator, and the metal contact pin is reserved on motor stator skeleton, and the U, V, W of coil is connected the metal contact pin respectively, and PCB is equipped with the preformed hole that is used for connecting the metal contact pin simultaneously, and the metal contact pin inserts the preformed hole and can be connected with the PCB electricity. The U, V, W of the coil is connected with the PCB by metal pins provided on the stator frame. However, more coils are arranged on a motor stator framework used by the existing portable fan, and no redundant space is reserved on the motor stator framework for arranging metal pins; in addition, only a tiny gap is reserved between the motor stator and the PCB in the motor, the direct welding of the coil U, V, W to the PCB is difficult to realize, and the problems of poor contact or short circuit caused by welding dislocation due to insufficient welding in the welding process can occur.

Disclosure of Invention

In view of this, the present utility model provides a portable fan, in which the driving circuit board is not disposed between the base and the stator, so that the electrical connection between the lead wire of the coil and the driving circuit board is simpler and more convenient, and the space between the base and the stator can be further reduced, so that the internal space distribution of the portable fan is more reasonable, thereby realizing miniaturization of the portable fan.

The utility model provides a portable fan, comprising: the shell is provided with an air inlet, a containing cavity and an air outlet which are communicated, and the shell also comprises a base and a hollow sleeve protruding from the base to the containing cavity; the fan assembly is accommodated in the shell and comprises a hub and a plurality of fan blades arranged on the outer surface of the hub at intervals, and a rotating shaft is fixed in the center of the inner side of the hub; the motor comprises a stator and a rotor, wherein the stator and the rotor are both accommodated in the hub, the stator is sleeved outside the sleeve, the stator comprises a coil, the rotor is radially arranged between the stator and the hub, and the rotating shaft is inserted in the sleeve; the driving circuit board is not arranged between the base and the stator, and is electrically connected with the lead wires of the coil so as to drive the fan assembly to rotate, and wind is blown out from the air outlet after passing through the accommodating cavity from the air inlet.

Further, the shell comprises a front shell and a rear shell, the shell further comprises a pressing piece arranged in the front shell, a plurality of connecting leaves are connected with the pressing piece and the front shell, the pressing piece is internally provided with the base and the sleeve, the base is positioned between the front end and the rear end of the pressing piece, a yielding space is formed in the pressing piece backwards, and the sleeve protrudes backwards from the base; the hub comprises a circle of annular extension wall, the stator and the rotor are contained in the extension wall, and the extension wall, the stator and the rotor extend forwards into the abdication space.

Further, the base forms a containing part forward in the pressing part, the driving circuit board is contained in the containing part, the front end of the pressing part further comprises a front cover, the front cover is arranged at the front end of the containing part, and the front cover is recessed backwards to form a negative pressure area.

Further, neither the stator nor the rotor is advanced beyond the extension wall.

Further, the hub comprises a wind guide surface which radially increases from back to front, the extension wall extends forwards beyond the wind guide surface, the pressurizing piece comprises a pressurizing surface which radially increases from back to front, and the wind guide surface and the pressurizing surface are closely spaced.

Further, the shell includes preceding shell and backshell, preceding shell includes first fan housing and first handheld shell, the backshell includes second fan housing and second handheld shell, first fan housing with the second fan housing forms air-out portion, first handheld shell with the handheld shell of second forms handheld portion, drive circuit board accept in handheld portion.

Further, the hand-held part is provided with a switch, an interface and a battery, wherein the switch is connected with the driving circuit board, or the interface is connected with the driving circuit board, and the battery is electrically connected with the driving circuit board.

Further, the switch is a stepless speed regulating switch.

Further, the first air shell comprises a first outer shell and a first inner shell which are matched with each other, the first inner shell and the first outer shell are in fit arrangement, and the first inner shell and the first outer shell extend horizontally and frontward; the second wind shell comprises a second outer shell and a second inner shell which are matched with each other inside and outside, the second inner shell is connected with the rear end of the second outer shell through a connecting piece, the second outer shell horizontally extends forwards, the second inner shell horizontally extends forwards from back to front and then radially expands outwards, the front end of the second inner shell is connected with the front end of the second outer shell, and the front end of the second inner shell is in butt joint with the rear end of the first inner shell.

The utility model also provides a portable fan, the motor is a three-phase motor, and the coil comprises twelve windings.

Compared with the prior art, the portable fan has the following beneficial effects: through will drive circuit board does not locate the base with between the stator for the electric connection between the lead wire of coil with drive circuit board is simpler convenient, simultaneously the base with space between the stator can further reduce, makes portable fan inner space distribution is more reasonable, thereby realizes portable fan's miniaturization.

Drawings

FIG. 1 is a perspective view of a first embodiment of a portable fan of the present utility model;

FIG. 2 is a cross-sectional view of a first embodiment of the portable fan of the present utility model;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a cross-sectional view of a third embodiment of the portable fan of the present utility model.

Detailed Description

For a better understanding of the objects, structures, features, and effects of the present utility model, a portable fan according to the present utility model will be further described with reference to the drawings and detailed description.

Fig. 1 and 2 are schematic views of a first embodiment of a portable fan according to the present utility model. The portable fan comprises a housing 1, a fan assembly 2, a motor 3 and a drive circuit board 4. The housing 1 is provided with an air inlet 161, a containing cavity 162 and an air outlet 163 which are communicated, the fan assembly 2, the motor 3 and the driving circuit board 4 are contained in the housing 1, the driving circuit board 4 is electrically connected with the motor 3 so as to drive the fan assembly 2 to rotate, and air is blown out from the air outlet 163 after passing through the containing cavity 162 from the air inlet 161.

As shown in fig. 1 and 2, the housing 1 includes a front case 11 and a rear case 12, the front case 11 includes a first air case 111 and a first hand case 112, the rear case 12 includes a second air case 121 and a second hand case 122, the first air case 111 and the second air case 121 form an air outlet portion 16, and the first hand case 112 and the second hand case 122 form a hand portion 17. It should be understood that the first air shell 111 and the second air shell 121 may be matched back and forth, or may be matched left and right; the first hand-held housing 112 and the second hand-held housing 122 may be coupled to each other in a front-back direction or in a left-right direction. The hand-held part 17 is provided with a switch 5, an interface 6 and a battery 7, and in this embodiment, the switch 5 is an stepless speed regulating switch 5. Of course, in other embodiments, the first handheld housing 112 and the second handheld housing 122 may not be provided, or may be provided in other common forms such as a desktop fan, a neck fan, a clip fan, and a stand fan.

As shown in fig. 2, the first air shell 111 includes a first outer shell and a first inner shell that are matched inside and outside, the first inner shell and the first outer shell are attached to each other, and the first inner shell and the first outer shell both extend horizontally forward. The second air casing 121 includes a second outer casing and a second inner casing that are matched inside and outside, the second inner casing is connected with the rear end of the second outer casing through a connecting piece, the second outer casing horizontally extends forward, the second inner casing horizontally extends forward from the rear forward, and then radially expands and extends outwards, the front end of the second inner casing is connected with the front end of the second outer casing, and the front end of the second inner casing is abutted with the rear end of the first inner casing. In this embodiment, the first housing and the second housing are integrally formed, but in other embodiments, the first housing and the second housing may be formed separately. The first air shell 111 and the second air shell 121 are of a double-layer shell 1 structure, so that the structure is more stable, and the shape change of the second inner shell is beneficial to pressurizing the wind, so that the wind power is stronger, and the air outlet distance is longer. Of course, in other embodiments, the first wind shell 111 and/or the second wind shell 121 may be a single-layer shell 1 structure.

As shown in fig. 1 and 2, the housing 1 further includes a pressing member 13 disposed in the first air case 111, the plurality of connecting blades 14 connect the pressing member 13 and the front case 11, a base 131 and a sleeve 132 are formed in the pressing member 13, the base 131 is located between the front end and the rear end of the pressing member 13, a yielding space 1321 is formed in the pressing member 13 rearward, and the base 131 forms a receiving portion 1322 in the pressing member 13 forward. The sleeve 132 protrudes from the base 131 toward the receiving chamber 162, i.e., the sleeve 132 protrudes rearward from the base 131, and the sleeve 132 is hollow.

As shown in fig. 1 and 2, the air inlet 161 is located at a radially inner region of the second inner case, and the air outlet 163 is located at a region between the pressing member 13 and a radially inner region of the first inner case. The fan assembly 2 comprises a hub 21 and a plurality of fan blades 22 arranged on the outer surface of the hub 21 at intervals, the hub 21 comprises a rear-to-front radial increased air guide surface 212, the pressurizing piece 13 comprises a rear-to-front radial increased pressurizing surface 133, and the air guide surface 212 and the pressurizing surface 133 are arranged at intervals closely adjacent to each other, so that air is smoothly blown forward. From the air inlet 161 to the air outlet 163, a radially outward air duct is formed, so that air is pressurized in the housing 1, and a large air outlet surface is formed.

As shown in fig. 1, the fan assembly 2 includes the hub 21, and a plurality of blades 22 disposed on an outer surface of the hub 21 at intervals, and a rotation shaft 23 is fixed at an inner center of the hub 21. The motor 3 includes a stator 31 and a rotor 32, and the stator 31 and the rotor 32 are both accommodated in the hub 21. Further, the hub 21 includes a ring-shaped extension wall 211, and the stator 31 and the rotor 32 are both accommodated in the extension wall 211. The stator 31 is sleeved outside the sleeve 132, the stator 31 includes a coil 311, the rotor 32 is radially disposed between the stator 31 and the hub 21, the rotating shaft 23 is inserted into the sleeve 132, and the extension wall 211, the stator 31 and the rotor 32 extend forward into the yielding space 1321.

As shown in fig. 1 and 2, the extending wall 211 extends forward beyond the air guiding surface 212, and the air guiding surface 212 and the pressing surface 133 are closely spaced, so that a gap between the air guiding surface 212 and the pressing surface 133 is offset from the front end of the extending wall 211, and dust is not easy to fall into the extending wall 211. Neither the stator 31 nor the rotor 32 extends forward beyond the extension wall 211, and the extension wall 211, the stator 31 and the rotor 32 extend forward into the relief space 1321, so that part of the extension wall 211, the stator 31 and the rotor 32 are accommodated in the relief space 1321.

As shown in fig. 1 and 2, the driving circuit board 4 is not disposed between the base 131 and the stator 31, the battery 7 is electrically connected to the driving circuit board 4, and the driving circuit board 4 is electrically connected to the lead wire of the coil 311 to drive the fan assembly 2 to rotate, so that wind is blown out from the air outlet 163 after passing through the accommodating cavity 162 from the air inlet 161. In this embodiment, the driving circuit board 4 is accommodated in the accommodating portion 1322 formed forward of the base 131, the front end of the pressing member 13 further includes a front cover 15, the front cover 15 is covered on the front end of the accommodating portion 1322, and the front cover 15 is recessed backward to form a negative pressure area 151. By providing the front cover 15, the housing part 1322 is covered on the one hand to shield and protect the driving circuit board 4; on the other hand, the negative pressure region 151 formed by the concave back of the front cover 15 may compensate air at the air outlet 163 to increase the air volume of the air outlet 163.

As shown in fig. 1, in the present embodiment, the motor 3 is a three-phase motor, the coil 311 includes twelve windings, and the number of windings is large, so that the internal space of the motor 3 is limited. Through will drive circuit board 4 does not locate base 131 with between the stator 31 for electric connection between the lead wire of coil 311 with drive circuit board 4 is simpler convenient, simultaneously the base 131 with space between the stator 31 can further reduce, makes portable fan inner space distribution is more reasonable, thereby realizes portable fan's miniaturization.

A second embodiment of the portable fan of the present utility model. The main difference from the first embodiment is that: the driving circuit board 4 is accommodated in the hand-held portion 17 and is located between the switch 5 and the interface 6, and the switch 5 is connected to the driving circuit board 4, or the interface 6 is connected to the driving circuit board 4. Other structures and performances are substantially the same as those of the first embodiment, and will not be described in detail here.

Fig. 4 is a schematic view of a third embodiment of the portable fan according to the present utility model. The main difference from the first embodiment is that: the driving circuit board 4 is accommodated in the hand-held portion 17 and is located below the battery 7. Other structures and performances are substantially the same as those of the first embodiment, and will not be described in detail here.

The above detailed description is merely illustrative of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model, so that all equivalent technical changes that can be made by the present specification and illustrations are included in the scope of the utility model.

Claims

1. A portable fan, comprising:

the shell is provided with an air inlet, a containing cavity and an air outlet which are communicated, and the shell also comprises a base and a hollow sleeve protruding from the base to the containing cavity;

the fan assembly is accommodated in the shell and comprises a hub and a plurality of fan blades arranged on the outer surface of the hub at intervals, and a rotating shaft is fixed in the center of the inner side of the hub;

the motor comprises a stator and a rotor, wherein the stator and the rotor are both accommodated in the hub, the stator is sleeved outside the sleeve, the stator comprises a coil, the rotor is radially arranged between the stator and the hub, and the rotating shaft is inserted in the sleeve;

the driving circuit board is not arranged between the base and the stator, and is electrically connected with the lead wires of the coil so as to drive the fan assembly to rotate, and wind is blown out from the air outlet after passing through the accommodating cavity from the air inlet.

2. The portable fan of claim 1, wherein: the shell comprises a front shell and a rear shell, the shell further comprises a pressing piece arranged in the front shell, a plurality of connecting leaves are connected with the pressing piece and the front shell, the pressing piece is internally provided with the base and the sleeve, the base is positioned between the front end and the rear end of the pressing piece, a yielding space is formed in the pressing piece backwards, and the sleeve protrudes backwards from the base; the hub comprises a circle of annular extension wall, the stator and the rotor are contained in the extension wall, and the extension wall, the stator and the rotor extend forwards into the abdication space.

3. The portable fan of claim 2, wherein: the base forms a containing part forwards in the pressurizing part, the driving circuit board is contained in the containing part, the front end of the pressurizing part further comprises a front cover, the front cover is arranged at the front end of the containing part, and the front cover is recessed backwards to form a negative pressure area.

4. The portable fan of claim 2, wherein: neither the stator nor the rotor extends forward beyond the extension wall.

5. The portable fan of claim 2, wherein: the hub comprises a wind guide surface which radially increases from back to front, the extension wall extends forwards beyond the wind guide surface, the pressurizing piece comprises a pressurizing surface which radially increases from back to front, and the wind guide surface and the pressurizing surface are closely spaced.

6. The portable fan of claim 1, wherein: the shell comprises a front shell and a rear shell, the front shell comprises a first air shell and a first handheld shell, the rear shell comprises a second air shell and a second handheld shell, the first air shell and the second air shell form an air outlet part, the first handheld shell and the second handheld shell form a handheld part, and the driving circuit board is accommodated in the handheld part.

7. The portable fan as set forth in claim 6, wherein: the hand-held part is provided with a switch, an interface and a battery, wherein the switch is connected with the driving circuit board, or the interface is connected with the driving circuit board, and the battery is electrically connected with the driving circuit board.

8. The portable fan as set forth in claim 7, wherein: the switch is a stepless speed regulating switch.

9. The portable fan as set forth in claim 6, wherein: the first air shell comprises a first outer shell and a first inner shell which are matched with each other, the first inner shell and the first outer shell are arranged in a fitting mode, and the first inner shell and the first outer shell extend horizontally and frontward; the second wind shell comprises a second outer shell and a second inner shell which are matched with each other inside and outside, the second inner shell is connected with the rear end of the second outer shell through a connecting piece, the second outer shell horizontally extends forwards, the second inner shell horizontally extends forwards from back to front and then radially expands outwards, the front end of the second inner shell is connected with the front end of the second outer shell, and the front end of the second inner shell is in butt joint with the rear end of the first inner shell.

10. The portable fan of any of claims 1-9, wherein: the motor is a three-phase motor, and the coil comprises twelve windings.