CN222558800U - Portable fan - Google Patents

Abstract

The application discloses a portable fan which comprises a holding part, a blowing part, a fan module and a fan module, wherein the blowing part is connected to one end of the holding part, an air inlet and an air outlet are formed in the blowing part, the fan module is arranged in the blowing part and used for pushing air flow to flow from the air inlet to the air outlet, a first end part and a second end part opposite to the first end part are distributed on the holding part along the direction from the air inlet to the air outlet, and the fan module is arranged in a space defined by the first end part and the second end part towards the extension line of the blowing part. The structure mode can keep the gravity centers of the fan module and the holding part consistent, so that the portable fan has stronger stability when being placed.

Description

Portable fan

Technical Field

The application relates to the field of fans, in particular to a portable fan.

Background

In hot summer, the fan becomes a necessary article for people to eliminate the heat, and is more favored by people along with the convenient use requirement of people and lighter weight and portability.

In order to improve the air output and facilitate carrying, the portable fan in the prior art is generally manufactured to be wide and large in blowing structure, and is slender in holding structure. This configuration results in an unstable center of gravity when the fan is placed, which in turn results in the fan being prone to toppling over.

Disclosure of utility model

The application aims to provide a portable fan capable of buffering and adjusting the displacement of fan blades.

An embodiment of the present application provides a portable fan, including:

A grip portion;

the air blowing part is connected to one end of the holding part, and an air inlet and an air outlet are formed in the air blowing part;

The fan assembly is arranged in the blowing part and is used for pushing air flow to flow from the air inlet to the air outlet;

the holding part is provided with a first end part and a second end part opposite to the first end part along the direction from the air inlet to the air outlet, and the fan assembly is arranged in a space defined by the first end part and the second end part towards the extension line of the blowing part.

Optionally, the blowing part comprises a connecting cylinder, the outer surface of the connecting cylinder is smooth, the connecting cylinder is connected with one end of the holding part, the fan assembly is arranged in the connecting cylinder, and/or,

The ratio of the distance from the first end to the second end to the length of the fan assembly is 1.05-1.35 along the direction from the air inlet to the air outlet, and/or,

A weight is provided in the grip portion to stabilize the portable fan when placed, and/or,

The blowing part is arranged along the first end part to the second end part, the length of the blowing part is longer than the distance from the first end part to the second end part, and/or,

The fan assembly includes a three-phase motor.

Optionally, the blower further comprises a mounting cylinder disposed within the connecting cylinder, the fan assembly disposed within the connecting cylinder, and/or,

The ratio of the length of the blowing part to the distance from the first end to the second end is 1.1-1.5, and/or,

The first end-to-second end distance is greater than a thickness of the grip portion perpendicular to the first end-to-second end direction.

Optionally, the air blowing part further comprises an air inlet cylinder and an air outlet cylinder, the air inlet is formed in the air inlet cylinder, the air outlet is formed in the air outlet cylinder, and the air inlet cylinder and the air outlet cylinder are respectively connected to the two ends of the assembly cylinder in a clamping mode.

Optionally, the surface of the air inlet cylinder bulges to form a plurality of connecting blocking edges, two adjacent connecting blocking edges are connected through a first connecting elastic sheet, a first claw is arranged on one side of the first connecting elastic sheet facing the connecting cylinder, a first buckle matched with the first claw is arranged on the surface of one end of the assembling cylinder connected with the air inlet cylinder, and/or,

The surface of the air outlet cylinder facing the connecting cylinder is inwards sunk to form a plurality of first clamping grooves, one end of the assembling cylinder facing the air outlet cylinder is correspondingly provided with a plurality of first openings, each first opening of the plurality of first openings is internally provided with a second connecting elastic sheet, one side of the second connecting elastic sheet facing the fan assembly is provided with a second clamping claw matched with the first clamping groove, and/or,

The length of the first inner surface of the air inlet barrel, which is opposite to one end of the fan assembly, is smaller than that of the first outer surface, and the first inner surface and the first outer surface form a first arc edge in a smooth transition manner, and/or,

The length of the second inner surface of the air outlet cylinder, which is opposite to one end of the fan assembly, is smaller than that of the second outer surface, and a second arc edge is formed by smooth transition between the second inner surface and the second outer surface.

Optionally, the air inlet cylinder comprises a connecting cylinder and an air inlet ring, wherein the connecting baffle edges, the first connecting elastic sheets and the first clamping jaws are all arranged on the connecting cylinder, the connecting cylinder is detachably connected with the air inlet ring, the maximum outer diameter of the connecting cylinder is smaller than the inner diameter of the assembling cylinder, the maximum outer diameter of the air inlet ring is larger than the outer diameter of the connecting cylinder, and/or,

The outer diameter of one end of the air outlet cylinder, which is connected with the assembly cylinder in a clamping way, is smaller than the inner diameter of the assembly cylinder, and the maximum outer diameter of one end of the air outlet cylinder, which is opposite to the assembly cylinder, is larger than the outer diameter of the connecting cylinder.

Optionally, the connecting flanges are provided with connecting screw holes, the air inlet ring is provided with a threaded column at a position corresponding to the connecting screw holes, the connecting screw holes are connected with the threaded column through first screws, one end of the assembly cylinder connected with the air outlet cylinder is provided with a containing groove for containing the first screws, the connecting screw holes and/or the threaded column, and/or,

The inner wall of one end of the assembly cylinder connected with the air outlet cylinder is provided with a limit stop edge, one end of the air outlet cylinder connected with the assembly cylinder is provided with a positioning sheet, a positioning groove is formed in the corresponding position of the positioning sheet, the positioning sheet is arranged in the extending direction of at least one first clamping groove of the plurality of first clamping grooves facing the assembly cylinder, and/or,

A filter screen is arranged between the connecting cylinder and the air inlet ring.

Optionally, the holding part comprises a shell, a battery and a connecting piece, wherein the battery is arranged in the shell, one end cover of the connecting piece is arranged at one end of the shell, and the other end of the connecting piece is connected with the blowing part.

Optionally, the shell is connected with the connecting piece in a clamping way, the connecting piece is connected with the blowing part through a screw, and/or,

The portable fan further comprises a first PCB circuit board, a second PCB circuit board and a third PCB circuit board, wherein the first PCB circuit board is arranged in the shell, the second PCB circuit board is arranged on the connecting piece, the third PCB circuit board is arranged on the fan assembly, the first PCB circuit board and the second PCB circuit board are mutually perpendicular, the first PCB circuit board and the second PCB circuit board are connected through a first conducting piece, the second PCB circuit board and the third PCB circuit board are connected through a second conducting piece, and the rigidity of the first conducting piece is larger than that of the second conducting piece.

Optionally, the first PCB is fastened and fixed on the inner surface of the shell, the second PCB is fixed on the connecting piece through screws, the third PCB is fastened and fixed on the fan assembly, and/or,

The first PCB circuit board is connected with the first control key, the second PCB circuit board is connected with the second control key, the movement path of the first control key after being stressed is mutually perpendicular to the first PCB circuit board, and the movement path of the second control key after being stressed is mutually parallel to the second PCB circuit board.

The embodiment of the application has the beneficial effects that the fan assembly of the portable fan is arranged in the blowing part, and the fan assembly is limited and placed in the space of the extension line components of the first end part and the second end part of the holding part. I.e. the fan assembly is defined to have a length in the blowing direction which is not greater than the length of the grip portion in the blowing direction. The structure mode can keep the gravity centers of the fan component and the holding part consistent, so that the portable fan has stronger stability when being placed. Secondly, portable fan can produce recoil force at the in-process of blowing, and when the focus of fan subassembly and gripping portion was inconsistent, portable fan can take place to turn to under the effect of recoil force, consequently, the relative positional relationship of fan subassembly and gripping portion in this embodiment can also avoid the portable fan to appear deflecting when blowing.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the overall structure of a portable fan according to an embodiment of the present application;

FIG. 2 is a schematic view of the position and structure of a grip and fan assembly according to an embodiment of the present application;

FIG. 3 is an exploded view of a fan assembly according to one embodiment of the present application;

FIG. 4 is an exploded view of the overall structure of a portable fan according to an embodiment of the present application;

FIG. 5 is an exploded view of a mounting barrel and fan assembly according to one embodiment of the present application;

FIG. 6 is a schematic view of the structure of an assembly barrel according to an embodiment of the present application;

FIG. 7 is a schematic view of a cartridge according to an embodiment of the present application;

Fig. 8 is a schematic structural view of an air inlet ring according to an embodiment of the present application.

The description of the drawings is 1, a holding part; 11, a first end; 12, second end, 13, housing, 14, battery, 15, connector, 2, blower, 21, air inlet, 22, air outlet, 23, connector, 24, assembly, 241, first fastener, 242, first opening, 243, second connector, 244, second jaw, 245, receiving slot, 246, limit stop edge, 247, positioning slot, 25, air outlet, 251, first clamping slot, 252, positioning tab, 253, second outer surface, 254, second inner surface, 255, second arcuate edge, 26, air inlet, 261, connector, 261a, connector edge, 261b, first connector, 261c, first jaw, 261d, connector screw, 262, air inlet ring, 262a, first outer surface, 262b, first inner surface, 262c, first arcuate edge, 262d, screw post, 27, filter screen, 3, fan assembly, 31, fan motor, 32, fan, 33, fan housing, 34, flexible protective sleeve, 341, protrusion, 41, first key board, second circuit, second key board, 43, second circuit board, printed circuit board, 46, printed circuit board, and printed circuit board.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, fig. 1 is a schematic view of the whole structure of a portable fan according to the present embodiment, and fig. 2 is a schematic view of the position of a grip portion and a fan assembly according to the present embodiment.

As shown in fig. 1 and 2, the portable fan comprises a holding part 1, a blowing part 2, a fan assembly 3, wherein the blowing part 2 is connected to one end of the holding part 1, an air inlet 21 and an air outlet 22 are formed in the blowing part 2, the fan assembly 3 is arranged in the blowing part 2 and used for pushing air flow to flow from the air inlet 21 to the air outlet 22, a first end 11 and a second end 12 opposite to the first end 11 are distributed on the holding part 1 along the direction from the air inlet 21 to the air outlet 22, and the fan assembly 3 is arranged in a space defined by the first end 11 and the second end 12 towards the extension lines L1 and L2 of the blowing part 2.

In this embodiment, the whole of the grip portion 1 is configured as a cuboid, and the joint positions of the sides of the grip portion 1 are smoothly transited through rounded corners. However, the overall configuration of the grip portion 1 is not limited thereto, and in some embodiments, the grip portion 1 is integrally configured in the shape of (but not limited to) a cylinder, a polygon, a cube, a cartoon figure, or the like, depending on the specific application.

In the present embodiment, the blower 2 is configured in a cylindrical shape. However, the configuration of the blower 2 is not limited thereto, and the blower 2 can be configured in a prismatic shape, a barrel shape, a polygonal shape, a racetrack shape, or the like in some embodiments, depending on the specific application.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a fan assembly according to the present embodiment.

As shown in fig. 3, the fan assembly 3 in the present embodiment includes a fan blade 32 and a fan motor 31. Inside the blowing part 2 is provided a connection ring for fixing the fan assembly 3. The fan blades 32 and the fan motor 31 are integrally constructed in a spatially multiplexed manner. However, the structure of the fan blades 32 and the fan motor 31 is not limited to that, and in some embodiments, the fan blades 32 and the fan motor 31 can be a separate structure, i.e., the fan blades 32 and the fan motor 31 are connected only by a rotation shaft.

In some embodiments, the fan assembly 3 further includes a fan housing 33, the fan blades 32 and the fan motor 31 are disposed within the fan housing 33, and the fan housing 33 encloses the fan blades 32 and the fan motor 31 as a standardized assembly. In the present embodiment, the length of the fan assembly 3 refers to the height of the cylindrical structure of the fan housing 33, or refers to the distance length from the tip of the fan blade 32 to the tail end of the fan motor 31.

In some embodiments, the fan assembly 3 further comprises a flexible protective sleeve 34, the flexible protective sleeve 34 being arranged over the fan housing 33 for increasing the stability of the connection between the fan assembly 3 and the blower 2. Meanwhile, the flexible protective sleeve 34 also has a buffering function, so that vibration and noise of the portable fan can be reduced. In this embodiment, the length of the fan assembly 3 refers to the height of the cylindrical structure of the flexible boot 34.

In some embodiments, the surface of the flexible protective sheath 34 is provided with dot-like protrusions 341 or annular protrusions (not shown). In some embodiments, the dot-shaped protrusions 341 and the annular protrusions are alternately arranged. The dot-shaped protrusions 341 and/or the annular protrusions can improve the buffering capacity of the flexible protection cover 34, further reduce vibration and noise of the portable fan, and at the same time, facilitate the assembly of the fan assembly 3 into the blower 2.

In the present embodiment, the first end 11 and the second end 12 actually show the length among three attribute parameters of the length, width, and height of the grip portion 1. Structurally, the overall length of the fan assembly 3 is not greater than the length of the grip portion 1, and from a positional standpoint, the fan assembly 3 is disposed within a range defined by the vertical extension of the first and second ends 11, 12.

The fan assembly 3 of the portable fan in the above embodiment is disposed in the blower portion 2, and the fan assembly 3 is defined to be placed in a space of the extension members of the first end portion 11 and the second end portion 12 of the grip portion 1. I.e. the fan assembly 3 is defined to have a length in the blowing direction which is not greater than the length of the grip portion 1 in the blowing direction. This configuration allows the center of gravity of the fan assembly 3 and the grip portion 1 to be maintained in unison, resulting in greater stability when the portable fan is placed. Secondly, the portable fan can generate recoil force in the blowing process, and when the gravity centers of the fan assembly 3 and the holding part 1 are inconsistent, the portable fan can turn under the action of the recoil force, so that the relative position relationship between the fan assembly 3 and the holding part 1 in the embodiment can also avoid deflection when the portable fan blows.

Again, when the rotation speed of the fan assembly 3 is high, for example, the fan motor 31 of the fan assembly 3 is a three-phase motor, since the rotation speed is high, high frequency vibration is generated, and the high frequency vibration in turn causes vibration of the entire portable fan, and even causes resonance of the portable fan in a specific scene. In the present embodiment, the fan assembly 3 is limited between the first end and the second end of the holding portion 1, so that the high-frequency vibration generated by the fan assembly 3 cannot be directly transmitted to the holding portion 1, but is transmitted to the blower 2 by the fan assembly 3, and then is transmitted to the holding portion 1 by the blower 2, and the vibration wave is attenuated in the transmission process, so that the amplitude and energy of the vibration of the holding portion 1 are greatly reduced. When the energy attenuation is large, the resonance occurrence condition can be broken, the resonance risk of the portable fan is reduced, and the use comfort of the portable fan is improved. The adoption of the three-phase motor can enable the rotating speed of the fan motor 31 to be higher, the blowing air quantity to be larger and the blowing effect to be more obvious.

The type of motor used for the fan motor 31 is not limited to a three-phase motor, but in some embodiments, the fan motor 31 can also use a two-phase motor.

Referring to fig. 4, fig. 4 is an exploded view of the whole structure of the portable fan according to the present embodiment.

As shown in fig. 4, in some embodiments, the blower 2 includes a connection cylinder 23, the outer surface of the connection cylinder 23 is smooth, the connection cylinder 23 is connected to one end of the grip 1, and the fan assembly 3 is disposed in the connection cylinder 23.

When the fan assembly 3 is in a working state, air near the connecting cylinder 23 flows to the position of the air inlet 21 after negative pressure at the air inlet 21 is formed, the outer surface of the connecting cylinder 23 is smooth, the air flow is smoother, and vortex formation is not caused in the flowing process due to obstruction, so that the air inlet of the portable fan is influenced. Therefore, the blowing efficiency of the portable fan can be improved.

The fan assembly 3 is fixed in the connection cylinder 23. For example, the fan assembly 3 is fixed by a connection ring provided in the hollow in the connection cylinder 23, or the fan assembly 3 is fixed by a connection rod provided inside the fan assembly 3.

The connecting tube 23 can be directly connected to the grip portion 1 by means of, but not limited to, screws, adhesives, clamping, welding or riveting.

In some embodiments, the connection between the connecting tube 23 and the grip portion 1 needs to be connected to the grip portion 1 through the connecting member 15, one end of the connecting member 15 is connected to the grip portion 1, and the other end of the connecting member 15 is connected to the connecting tube 23. The connection between the connecting tube 23 and the connecting member 15 is not limited to screws, adhesives, clamping, welding or riveting. The connecting tube 23 is connected directly with the grip portion 1 or through the connecting piece 15, and the connecting tube 23 is connected with the grip portion 1.

In some embodiments, the ratio of the distance from the first end 11 to the second end 12 to the length of the fan assembly 3 in the direction from the air inlet 21 to the air outlet 22 is 1.05-1.35. Within this ratio, the overall form and blowing efficiency of the portable fan is optimized. When the ratio of the two is greater than 1.35, the ratio of the fan assembly 3 to the grip portion 1 starts to be gradually deregulated, and the driving power of the fan assembly 3 is reduced too small. When the ratio of the two components is smaller than 1.05, the ratio of the fan component 3 to the holding part 1 is gradually unbalanced, and the gravity center distribution of the fan component 3 is deviated when the fan component 3 gradually becomes larger due to uneven mass distribution of the fan component 3, so that the stability of the portable fan is insufficient. Too large a fan assembly 3 may also result in the overall portable fan "head to foot" losing balance.

In some embodiments, a weight is provided within the grip 1 to keep the portable fan stable when placed. Typically, the counterweight is served by the battery 14, but the object of configuration is not limited thereto, and in some embodiments, the counterweight is made of a metal such as lead, copper, iron, or a compound or mixture of the foregoing metals, depending on the particular application. The weight block can also be combined with the battery 14 to be a weight of the grip portion 1.

The arrangement of the counterweight can further promote the placement stability of the holding part 1, reduce the gravity center of the portable fan and prevent the portable fan from falling down.

The blower 2 is arranged along the first end 11 to the second end 12, the length of the blower 2 being greater than the distance from the first end 11 to the second end 12. The fan assembly 3 is arranged in the blowing part 2, the length of the blowing part 2 being longer than the distance from the first end 11 to the second end 12, i.e. the length of the blowing part 2 being longer than the length of the grip part 1. When the length of the blowing part 2 is larger than that of the holding part 1, the air flows have certain beam-shaped space when entering the blowing part 2 and flowing out of the blowing part 2, the air flows entering the fan assembly 3 can be mixed to have uniform flow direction and flow velocity, and the air flows flowing out of the blowing part 2 can be mixed to have uniform flow direction and flow velocity, so that the blowing efficiency of the portable fan is integrally improved.

When the fan assembly 3 is operated, a negative pressure air space is formed around the air inlet 21, and a positive pressure air space is formed in the air outlet 22. The negative pressure wind area at the air inlet 21 can enable surrounding air flow to converge towards the air inlet 21, if the length of the blowing part 2 is too short, the air inlet 21 is flush with the holding part 1 or is inside the holding part 1, when the surrounding air flow converges, the holding part 1 can become obstruction to the air flow, so that the flowing air flow is turbulent or vortex, and the air inlet efficiency is reduced. When the length of the blowing part 2 is longer than that of the holding part 1, a space is reserved between the air inlet 21 and the holding part 1, the holding part 1 is not the obstruction of the surrounding air flow to the air inlet 21, and the air inlet efficiency of the portable fan is greatly improved. The positive pressure wind area formed by the air outlet 22 can enable the air flow around the air outlet 22 to flow around, if the length of the air blowing part 2 is too short, the air outlet 22 is flush with the holding part 1 or is within the holding part 1, the air flow blown out by the air outlet 22 can flow along the holding part 1 due to the wall attaching effect, the air outlet efficiency is reduced, or the air flow blown out by the air outlet 22 can collide with the holding part 1 to generate a cyclone, and the air outlet efficiency is also reduced. When the length of the blowing part 2 is greater than that of the holding part 1, the air outlet 22 and the holding part 1 are spaced, so that the collision between air flow and the holding part 1 can be avoided, or the wall attaching effect is generated, and the air outlet efficiency of the portable fan is greatly improved.

In some embodiments, the ratio of the length of the blower 2 to the distance from the first end 11 to the second end 12 is 1.1-1.5. Within this ratio, the air inlet and outlet efficiencies of the portable fan are optimized. When the ratio of the two is greater than 1.5, the ratio of the air blowing part 2 to the holding part 1 is out of balance, and the overlong air outlet part enables the distance from the air inlet 21 to the fan assembly 3 to be overlong, the air inlet mixed flow space is overlarge, the contact area between the air flow and the inner wall space of the air blowing part 2 is excessively increased, and the air inlet noise is large. The too long air outlet portion also makes the distance from the fan assembly 3 to the air outlet 22 too long, which also results in a loud air outlet noise and low air outlet efficiency. When the ratio of the two is smaller than 1.1, the too short air outlet portion makes the distance from the air inlet 21 to the fan assembly 3 too short, so that the air flow entering the fan assembly can not be well bundled, and the air flow entering the fan blades 32 is more in turbulence, and the efficiency of the fan blades 32 is affected. The too short air outlet portion makes the distance from the air outlet 22 to the fan assembly 3 too short, and further makes the air flow blown out from the air outlet 22 too disperse and have poor directivity.

The distance from the first end 11 to the second end 12 is greater than the thickness of the grip portion 1 in a direction perpendicular to the first end 11 to the second end 12. I.e. from the angle of "length width height", the length of the grip portion 1 is greater than the width of the grip portion 1. This configuration cooperates with the barrel-shaped blower 2 to provide a more consistent overall configuration of the portable fan.

Referring to fig. 5, fig. 5 is an exploded view of the assembly barrel and fan assembly of the present embodiment.

As shown in fig. 5, in some embodiments, the blower 2 further includes a fitting cylinder 24, the fitting cylinder 24 being disposed within the connection cylinder 23, and the fan assembly 3 being disposed within the connection cylinder 23. A fitting cylinder 24 is provided in the connection cylinder 23, and the fitting cylinder 24 is connected to the fan assembly 3.

In some embodiments, the assembly barrel 24 and the connection barrel 23 are made of different materials, for example, the connection barrel 23 is made of a metal material, and the assembly barrel 24 is made of a plastic material, so that the assembly barrel 24 and the connection barrel 23 are manufactured separately, thereby greatly improving the assembly efficiency and the external appearance of the portable fan. It is possible to ensure smooth and convenient grip of the outer surface of the connecting cylinder 23.

However, the relationship between the fitting cylinder 24 and the connecting cylinder 23 is not limited thereto, and the fitting cylinder 24 and the connecting cylinder 23 can be manufactured by using the same material through an integrated manufacturing technique according to the specific application, and in this embodiment, the function of the fitting cylinder 24 and the connecting cylinder 23 should be distinguished from the function of the whole member, rather than whether the members are independently distinguished.

Referring to fig. 6-8, fig. 6 is a schematic structural view of an assembling cylinder of the present embodiment, fig. 7 is a schematic structural view of a connecting cylinder of the present embodiment, and fig. 8 is a schematic structural view of an air inlet ring of the present embodiment.

As shown in fig. 6-8, in some embodiments, the blowing part 2 further includes an air inlet cylinder 26 and an air outlet cylinder 25, the air inlet 21 is formed on the air inlet cylinder 26, the air outlet 22 is formed on the air outlet cylinder 25, and the air inlet cylinder 26 and the air outlet cylinder 25 are respectively connected to two ends of the assembly cylinder 24 in a clamping manner.

The air inlet duct 26 and the air outlet duct 25 are respectively arranged at two ends of the assembly drum 24, and can clamp the connecting drum 23 to prevent the assembly drum 24 from falling from the connecting drum 23. The air inlet cylinder 26 and the air outlet cylinder 25 are fixed in a clamping manner, so that the air inlet cylinder 26 and the air outlet cylinder 25 are convenient to assemble and disassemble.

The surface of the air inlet cylinder 26 bulges to form a plurality of connecting blocking edges 261a, two adjacent connecting blocking edges 261a are connected through a first connecting elastic sheet 261b, one side of the first connecting elastic sheet 261b, which faces the connecting cylinder 23, is provided with a first claw 261c, and one end surface of the assembly cylinder 24, which is connected with the air inlet cylinder 26, is provided with a first buckle 241 matched with the first claw 261 c. The arrangement of the connecting blocking edges 261a reduces the overall volume of the air inlet barrel 26, less material is needed for manufacturing the air inlet barrel 26, and the space between the two connecting blocking edges 261a can also be used for arranging the first clamping jaw 261c, so that the first clamping jaw 261c has a space for being deformed under pressure. The surface space of the air inlet cylinder 26 is ingeniously utilized in the mode, so that the connection between the air inlet cylinder 26 and the assembly cylinder 24 is more ingenious, and the space utilization rate is improved.

The surface of the air outlet barrel 25 facing the connecting barrel 23 is inwards recessed to form a plurality of first clamping grooves 251, one end of the assembly barrel 24 facing the air outlet barrel 25 is correspondingly provided with a plurality of first openings 242, each first opening 242 in the plurality of first openings 242 is internally provided with a second connecting elastic sheet 243, and one side of the second connecting elastic sheet 243 facing the fan assembly 3 is provided with a second clamping claw 244 matched with the first clamping groove 251. Likewise, the connection mode of the assembly cylinder 24 and the air outlet cylinder 25 skillfully opens the first opening 242 on the surface of the assembly cylinder 24, and opens the second connection elastic sheet 243 at the position of the first opening 242, so that the assembly cylinder 24 can be clamped with the air outlet cylinder 25 without arranging a convex structure, the space structure is reasonably utilized, and the space utilization rate of assembly is improved.

It should be noted that the connection manner between the air inlet tube 26 and the air outlet tube 25 and the assembly tube 24 is not limited to this, and the connection manner between the air inlet tube 26 and the air outlet tube 25 and the assembly tube 24 can be (but not limited to) gluing, screw connection, riveting, etc. according to the specific application scenario.

In some embodiments, the mounting barrel 24 and the air inlet barrel 26 or the air outlet barrel 25 can be manufactured using an integrally formed technique.

In some embodiments, the length of the first inner surface 262b of the end of the air intake sleeve 26 facing away from the fan assembly 3 is less than the length of the first outer surface 262a, and a smooth transition between the first inner surface 262b and the first outer surface 262a forms a first arcuate edge 262c. That is, the first inner surface 262b extends outwardly less than the first outer surface 262a, and therefore, the ends of the first inner surface 262b and the first outer surface 262a form a difference in length that is connected by the first arcuate edge 262c such that the edge of the air intake 21 forms a smooth edge shaped like a "bell mouth". When the air inlet 21 is in air, the first arc-shaped edge 262c has a guiding effect on the air flow entering the air inlet, and smooth lines of the first arc-shaped edge can also avoid hard contact between the air flow and the side edges, so that the air inlet efficiency of the portable fan can be improved, and the air noise of the air inlet can be reduced.

In some embodiments, a length of the second inner surface 254 of the end of the air outlet duct 25 facing away from the fan assembly 3 is less than a length of the second outer surface 253, and a smooth transition between the second inner surface 254 and the second outer surface 253 forms a second arcuate edge 255. That is, the second inner surface 254 extends outwardly less than the second outer surface 253, and therefore, the ends of the second inner surface 254 and the second outer surface 253 form a difference in length that is connected by the second arcuate edge 255 such that the edge of the air outlet 22 forms a smooth edge shaped like a "bell mouth". The second arc limit 255 has the guide effect to the air current of outflow when air outlet 22 air-out, forms the coanda effect based on the arcwall face of second arc limit 255 when the air current flows out, carries out quick pressure release to high-speed air current, increases the air current and flows the area in the direction of blowing, and its smooth line also can avoid the air current to appear the harshness contact with the side, consequently, can promote portable fan's air-out efficiency, increases the area of blowing, can also reduce the wind noise of air-out.

In some embodiments, the air inlet cylinder 26 comprises a connecting cylinder 261 and an air inlet ring 262, wherein a plurality of connecting blocking edges 261a, a first connecting elastic sheet 261b and a first claw 261c are arranged on the connecting cylinder 261, the connecting cylinder 261 is detachably connected with the air inlet ring 262, the maximum outer diameter of the connecting cylinder 261 is smaller than the inner diameter of the assembling cylinder 24, and the maximum outer diameter of the air inlet ring 262 is larger than the outer diameter of the connecting cylinder 23. The air inlet tube 26 can be split into a connector tube 261 and an air inlet ring 262. The detachable construction, although adding to the assembly process, allows more space for adjustability of the connection between the assembly barrel 24 and the air intake barrel 26, and greater tolerance to fault during assembly.

In this embodiment, the first inner surface 262b and the first outer surface 262a are both disposed on the air inlet ring 262, and the first arcuate edge 262c is also disposed on the air inlet ring 262.

The connecting baffles 261a are provided with connecting screw holes 261d, the air inlet ring 262 is provided with threaded columns 262d at positions corresponding to the connecting screw holes 261d, the connecting screw holes 261d are connected with the threaded columns 262d through first screws, and the end, connected with the air outlet barrel 25, of the assembly barrel 24 is provided with a containing groove 245 for containing the first screws, the connecting screw holes 261d and/or the threaded columns 262 d. The receiving groove 245 can receive one or more of the first screw, the connection screw hole 261d, or the screw post 262 d. The screw connection enables adjustment of the connection between the mounting cylinder 24 and the air inlet cylinder 26 with a higher tolerance to errors in mounting. The connecting baffle edge 261a is provided with the connecting screw hole 261d, and two connecting modes are arranged between the connecting baffle edge 261a and the adjacent connecting baffle edge 261a through reasonable application to space, so that the space utilization efficiency is improved. The accommodating groove 245 is formed so that the first screw does not protrude from the surface of the assembly tube 24, thereby facilitating assembly.

The detachable connection manner of the engagement cylinder 261 and the air inlet ring 262 is not limited to this, and in some embodiments, the engagement cylinder 261 and the air inlet ring 262 can be connected by a clamping manner according to different specific application scenarios.

In some embodiments, the adapter sleeve 261 and the air intake ring 262 can be formed by an integrally formed manufacturing technique.

The outer diameter of one end of the air outlet cylinder 25, which is connected with the assembly cylinder 24 in a clamping way, is smaller than the inner diameter of the assembly cylinder 24, and the maximum outer diameter of one end of the air outlet cylinder 25, which is away from the assembly cylinder 24, is larger than the outer diameter of the connecting cylinder 23.

The outer diameter of the end, connected with the assembly barrel 24, of the air outlet barrel 25 and the connecting barrel 261 is smaller than the inner diameter of the assembly barrel 24, so that the end, connected with the assembly barrel 24, of the air outlet barrel 25 and the connecting barrel 261 can be inserted into the assembly barrel 24. The maximum external diameter of the air outlet cylinder 25, which is far away from one end of the assembly cylinder 24 and the air inlet ring 262, is larger than the external diameter of the connecting cylinder 23, so that the connecting cylinder 23 can be clamped and limited, and the assembly cylinder 24 and the connecting cylinder 23 are prevented from being separated or shifted.

In some embodiments, a limiting stop edge 246 is disposed on an inner wall of an end of the assembly tube 24 connected to the air outlet tube 25, a positioning plate 252 is disposed on an end of the air outlet tube 25 connected to the assembly tube 24, a positioning slot 247 is disposed on the limiting stop edge 246 at a position corresponding to the positioning plate 252, and the positioning plate 252 is disposed in an extending direction of at least one first clamping slot 251 of the plurality of first clamping slots 251 facing the assembly tube 24. The positioning piece 252 and the positioning groove 247 are arranged, so that the air outlet cylinder 25 and the assembly cylinder 24 can be conveniently clamped and assembled. The positioning plate 252 is disposed in the extending direction of the first clamping groove 251 facing the assembly cylinder 24, so that the first clamping groove 251, the second connecting elastic sheet 243 and the second claw 244 are more convenient to assemble.

In some embodiments, a filter screen 27 is disposed between the connection cylinder 23 and the air inlet ring 262. The filter screen 27 is provided to prevent foreign matters and hair or clothes of a user from being caught in the fan assembly 3, thereby providing excellent protection. And the filter screen 27 is arranged between the connecting cylinder 23 and the air inlet ring 262, so that the filter screen 27 is convenient to install and replace.

In some embodiments, the grip portion 1 includes a housing 13, a battery 14, and a connection member 15, the battery 14 is disposed in the housing 13, an end cap of the connection member 15 is disposed at one end of the housing 13, and the other end of the connection member is connected to the blower portion 2.

The air blowing part 2 and the holding part 1 are connected through the connecting piece 15, so that the air blowing part 2 and the holding part 1 are mutually independent, and one of the air blowing part 2 and the holding part 1 is convenient to be detached and maintained independently. Meanwhile, as the blowing part 2 and the holding part 1 are provided with the established functional shapes, the specific shapes of the blowing part 2 and the holding part 1 are inconvenient to connect and fix, the blowing part 2 and the holding part 1 are connected by adopting the connecting piece 15, and the connecting piece 15 can carry out adaptive deformation butt joint according to different shape requirements of the blowing part 2 and the holding part 1, so that the stability of connection is improved. For example, an end of the connection member 15 connected to the blower portion 2 is provided with an arc-shaped groove, and an end of the connection member 15 connected to the grip portion 1 is configured to be shaped similarly to the outer shape of the grip portion 1.

In some embodiments, the connection member 15 is connected with the blower 2 through a screw, and the connection member 15 is connected with the housing 13 through a clamping connection. However, the connection between the connection member 15 and the blower 2 is not limited to this, and in some embodiments, the connection member 15 and the blower 2 may be fixed by (but not limited to) gluing, clamping, riveting, welding, etc. according to the specific application. The connecting member 15 and the housing 13 can be fixedly connected by, but not limited to, interference fit, screw connection, riveting, gluing, welding and the like.

The portable fan further comprises a first PCB circuit board 41, a second PCB circuit board 42 and a third PCB circuit board 43, wherein the first PCB circuit board 41 is arranged in the shell 13, the second PCB circuit board 42 is arranged on the connecting piece 15, the third PCB circuit board 43 is arranged on the fan assembly 3, the first PCB circuit board 41 and the second PCB circuit board 42 are mutually perpendicular, the first PCB circuit board 41 and the second PCB circuit board 42 are connected through a first conducting piece 46, the second PCB circuit board 42 and the third PCB circuit board 43 are connected through a second conducting piece 47, and the rigidity of the first conducting piece 46 is larger than or equal to that of the second conducting piece 47.

The first PCB circuit board 41, the second PCB circuit board 42 and the third PCB circuit board 43 are respectively arranged at different positions of the portable fan, so that the assembly area of various electronic components of the portable fan can be increased, the problem that electromagnetic interference is large due to densely assembled electronic components can be effectively avoided, and the electronic interference intensity between different circuit boards is effectively reduced. Meanwhile, the PCB circuit boards at different positions can also avoid the excessive concentration of heating of electronic components, and the heat dissipation efficiency of the portable fan is improved.

The rigidity of the first conducting piece 46 is greater than that of the second conducting piece 47, so that the supporting force of the second PCB circuit board 42 on the first PCB circuit board 41 is greater, and the second PCB circuit board 42 has a supporting effect on the first PCB circuit board 41 by matching with the mutually perpendicular structure of the first PCB circuit board 41 and the second PCB circuit board 42, so that the phenomenon that the first PCB circuit board 41 is displaced towards the inside of the shell 13 under the action of external force is prevented. The second conductive member 47 is connected with a smaller rigidity, which facilitates the installation of the blowout part 2 and the connection member 15.

In some embodiments, the first conductive member 46 is a motor component pin or a welded prismatic ferrous metal rod. The second conductive member 47 is a wire, a flat cable, or a flexible circuit board.

The first PCB 41 is fastened and fixed on the inner surface of the housing 13, the second PCB 42 is fastened and fixed on the connecting member 15 by screws, and the third PCB 43 is fastened and fixed on the fan assembly 3. The first PCB 41 is snap-fit to facilitate assembly and disassembly thereof. The second PCB 42 is fixed on the connecting piece 15 by a screw, and since the second PCB 42 needs to support the first PCB 41, the better the stability of the second PCB 42 is, the higher the limit or support degree of the first PCB 41 is. The third PCB 43 is fastened to the fan assembly 3, facilitates assembly and disassembly thereof, and can serve as a dust cover for the fan assembly 3.

In some embodiments, the first PCB 41 is connected to the first control key 44, the second PCB 42 is connected to the second control key 45, the movement path of the first control key 44 after being stressed is perpendicular to the first PCB 41, and the movement path of the second control key 45 after being stressed is parallel to the second PCB 42. Because the first PCB 41 is fixed by the clamping connection, and the second PCB 42 can support the first PCB 41, the first PCB 41 has higher stress strength in the vertical direction, and is suitable for assembling the first control key 44 moving in the vertical direction. The second PCB 42 is fixed on the connecting piece 15 by a screw, the suspended area is larger, the vertical stress capability is weaker, but because of the screw fixation, the rotation resistance capability is stronger, the movement path of the second control button 45 after being stressed is parallel to the second PCB 42, and the second PCB 42 can well resist the steering force or deflection force applied to the second control button 45 when in use.

The plural number in this embodiment means two or more.

Any of the embodiments of the present invention can be implemented independently or in combination with one or more other embodiments. In the case of combination, the combination method should not be limited to the combination method exemplified in this embodiment.

It should be noted that while the present application has been illustrated in the drawings and described in connection with the preferred embodiments thereof, it is to be understood that the application may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but are to be construed as providing a full breadth of the disclosure. The above technical features are further combined with each other to form various embodiments which are not listed above and are all considered as the scope of the present application described in the specification, further, the improvement or transformation can be carried out by the person skilled in the art according to the above description, and all the improvements and transformation shall fall within the protection scope of the appended claims.

Claims (10)

1. A portable fan, comprising:

A grip portion;

the air blowing part is connected to one end of the holding part, and an air inlet and an air outlet are formed in the air blowing part;

The fan assembly is arranged in the blowing part and is used for pushing air flow to flow from the air inlet to the air outlet;

the holding part is provided with a first end part and a second end part opposite to the first end part along the direction from the air inlet to the air outlet, and the fan assembly is arranged in a space defined by the first end part and the second end part towards the extension line of the blowing part.

2. The portable fan according to claim 1, wherein the blowing portion includes a connection cylinder having a smooth outer surface, the connection cylinder being connected to one end of the grip portion, the fan assembly being provided in the connection cylinder, and/or,

The ratio of the distance from the first end to the second end to the length of the fan assembly is 1.05-1.35 along the direction from the air inlet to the air outlet, and/or,

A weight is provided in the grip portion to stabilize the portable fan when placed, and/or,

The blowing part is arranged along the first end part to the second end part, the length of the blowing part is longer than the distance from the first end part to the second end part, and/or,

The fan assembly includes a three-phase motor.

3. The portable fan of claim 2, wherein the blower further comprises a mounting cylinder disposed within the connecting cylinder, the fan assembly disposed within the connecting cylinder, and/or,

The ratio of the length of the blowing part to the distance from the first end to the second end is 1.1-1.5, and/or,

The first end-to-second end distance is greater than a thickness of the grip portion perpendicular to the first end-to-second end direction.

4. The portable fan of claim 3, wherein the blower further comprises an air inlet cylinder and an air outlet cylinder, the air inlet is formed in the air inlet cylinder, the air outlet is formed in the air outlet cylinder, and the air inlet cylinder and the air outlet cylinder are respectively connected to two ends of the assembly cylinder in a clamping mode.

5. The portable fan of claim 4, wherein the surface of the air inlet cylinder bulges to form a plurality of connecting blocking edges, two adjacent connecting blocking edges are connected through a first connecting elastic sheet, a first claw is arranged on one side of the first connecting elastic sheet facing the connecting cylinder, a first buckle matched with the first claw is arranged on one end surface of the assembling cylinder connected with the air inlet cylinder, and/or,

The surface of the air outlet cylinder facing the connecting cylinder is inwards sunk to form a plurality of first clamping grooves, one end of the assembling cylinder facing the air outlet cylinder is correspondingly provided with a plurality of first openings, each first opening of the plurality of first openings is internally provided with a second connecting elastic sheet, one side of the second connecting elastic sheet facing the fan assembly is provided with a second clamping claw matched with the first clamping groove, and/or,

The length of the first inner surface of the air inlet barrel, which is opposite to one end of the fan assembly, is smaller than that of the first outer surface, and the first inner surface and the first outer surface form a first arc edge in a smooth transition manner, and/or,

The length of the second inner surface of the air outlet cylinder, which is opposite to one end of the fan assembly, is smaller than that of the second outer surface, and a second arc edge is formed by smooth transition between the second inner surface and the second outer surface.

6. The portable fan of claim 5, wherein the air inlet cylinder comprises a connecting cylinder and an air inlet ring, the connecting flanges, the first connecting spring pieces and the first clamping jaws are all arranged on the connecting cylinder, the connecting cylinder is detachably connected with the air inlet ring, the maximum outer diameter of the connecting cylinder is smaller than the inner diameter of the assembling cylinder, the maximum outer diameter of the air inlet ring is larger than the outer diameter of the connecting cylinder, and/or,

The outer diameter of one end of the air outlet cylinder, which is connected with the assembly cylinder in a clamping way, is smaller than the inner diameter of the assembly cylinder, and the maximum outer diameter of one end of the air outlet cylinder, which is opposite to the assembly cylinder, is larger than the outer diameter of the connecting cylinder.

7. The portable fan according to claim 6, wherein the plurality of connecting flanges are provided with connecting screw holes, the air inlet ring is provided with threaded columns at positions corresponding to the connecting screw holes, the connecting screw holes are connected with the threaded columns through first screws, one end of the assembly barrel connected with the air outlet barrel is provided with a containing groove for containing the first screws, the connecting screw holes and/or the threaded columns, and/or,

The inner wall of one end of the assembly cylinder connected with the air outlet cylinder is provided with a limit stop edge, one end of the air outlet cylinder connected with the assembly cylinder is provided with a positioning sheet, a positioning groove is formed in the corresponding position of the positioning sheet, the positioning sheet is arranged in the extending direction of at least one first clamping groove of the plurality of first clamping grooves facing the assembly cylinder, and/or,

A filter screen is arranged between the connecting cylinder and the air inlet ring.

8. The portable fan of claim 1, wherein the grip portion comprises a housing, a battery and a connector, the battery is disposed in the housing, an end cap of the connector is disposed at one end of the housing, and the other end of the connector is connected to the blower.

9. The portable fan as claimed in claim 8, wherein the housing is snap-coupled to the coupling member, the coupling member is screw-coupled to the blower portion, and/or,

The portable fan further comprises a first PCB circuit board, a second PCB circuit board and a third PCB circuit board, wherein the first PCB circuit board is arranged in the shell, the second PCB circuit board is arranged on the connecting piece, the third PCB circuit board is arranged on the fan assembly, the first PCB circuit board and the second PCB circuit board are mutually perpendicular, the first PCB circuit board and the second PCB circuit board are connected through a first conducting piece, the second PCB circuit board and the third PCB circuit board are connected through a second conducting piece, and the rigidity of the first conducting piece is larger than that of the second conducting piece.

10. The portable fan of claim 9, wherein the first PCB is snap-fit to the housing interior surface, the second PCB is screw-fixed to the connector, the third PCB is snap-fit to the fan assembly, and/or,

The first PCB circuit board is connected with the first control key, the second PCB circuit board is connected with the second control key, the movement path of the first control key after being stressed is mutually perpendicular to the first PCB circuit board, and the movement path of the second control key after being stressed is mutually parallel to the second PCB circuit board.