Portable fan

Abstract

The utility model discloses a portable fan. The portable fan comprises a holding part; 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 module is arranged in the air blowing part and is 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 in the direction from the air inlet to the air outlet, and the fan module is arranged in a space defined by extension lines, facing the air blowing part, of the first end part and the second end part. By means of the construction mode, the gravity center of the fan module and the gravity center of the holding part can be kept consistent, and the portable fan has higher stability when placed.

Description

Technical Field

[0001] The present application relates to the field of fans, and in particular to a portable fan. Background Art

[0002] In the hot summer, fans have become a must-have item for people to get rid of the heat. With people's demand for convenient use, lighter and more portable fans are becoming more and more popular.

[0003] In order to increase the air volume and facilitate carrying, portable fans in the prior art are usually manufactured with a relatively wide blowing structure and a relatively slender holding structure. This structure causes the center of gravity of the fan to be unstable when placed, which in turn causes the fan to fall over easily. Utility Model Content

[0004] The purpose of the present application is to provide a portable fan capable of buffering and adjusting the displacement of fan blades.

[0005] The present application provides a portable fan, comprising:

[0006] Grip part;

[0007] A blowing part, the blowing part is connected to one end of the holding part, and the blowing part is provided with an air inlet and an air outlet;

[0008] A fan assembly, the fan assembly being disposed in the blowing portion and being used to push the air flow from the air inlet to the air outlet;

[0009] The holding portion is provided with a first end portion and a second end portion opposite to the first end portion along a direction from the air inlet to the air outlet, and the fan assembly is arranged in a space defined by an extension line of the first end portion and the second end portion toward the blowing portion.

[0010] Optionally, the blowing part comprises: a connecting tube, the outer surface of the connecting tube is smooth, the connecting tube is connected to one end of the holding part, and the fan assembly is arranged in the connecting tube; and / or,

[0011] Along the direction from the air inlet to the air outlet, 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; and / or,

[0012] A counterweight is provided in the holding portion so that the portable fan remains stable when placed; and / or,

[0013] The blowing portion is arranged from the first end to the second end, and the length of the blowing portion is greater than the distance from the first end to the second end; and / or,

[0014] The fan assembly includes a three-phase motor.

[0015] Optionally, the blowing part further includes: an assembly cylinder, the assembly cylinder is arranged in the connecting cylinder, and the fan assembly is arranged in the connecting cylinder; and / or,

[0016] The ratio of the length of the blowing portion to the distance from the first end to the second end is: 1.1-1.5; and / or,

[0017] The distance from the first end to the second end is greater than the thickness of the holding portion in a direction perpendicular to the first end to the second end.

[0018] Optionally, the blowing part further includes: an air inlet tube and an air outlet tube, the air inlet is arranged on the air inlet tube, the air outlet is arranged on the air outlet tube, and the air inlet tube and the air outlet tube are respectively connected to two ends of the assembly tube by snap-connection.

[0019] Optionally, the surface of the air inlet cylinder is raised to form a plurality of connecting baffles, two adjacent connecting baffles are connected by a first connecting spring sheet, a first claw is provided on the side of the first connecting spring sheet facing the connecting cylinder, and a first buckle cooperating with the first claw is provided on the surface of one end of the assembly cylinder connected to the air inlet cylinder; and / or,

[0020] The surface of the air outlet cylinder facing the connecting cylinder is indented to form a plurality of first slots, and a plurality of first openings are correspondingly opened at one end of the assembly cylinder facing the air outlet cylinder, and a second connecting elastic piece is arranged in each of the plurality of first openings, and a second claw cooperating with the first slot is arranged on the side of the second connecting elastic piece facing the fan assembly; and / or,

[0021] The length of the first inner surface of the end of the air inlet cylinder facing away from the fan assembly is smaller than the length of the first outer surface, and the first inner surface and the first outer surface smoothly transition to form a first arc-shaped edge; and / or,

[0022] The length of the second inner surface of the end of the air outlet tube facing away from the fan assembly is smaller than the length of the second outer surface, and the second inner surface and the second outer surface are smoothly transitioned to form a second arc-shaped edge.

[0023] Optionally, the air inlet cylinder comprises: a connecting cylinder and an air inlet ring, the multiple connecting baffles, the first connecting spring sheet and the first claw are all arranged on the connecting cylinder, the connecting cylinder is detachably connected to the air inlet ring, the maximum outer diameter of the connecting cylinder is smaller than the inner diameter of the assembly cylinder, and the maximum outer diameter of the air inlet ring is larger than the outer diameter of the connecting cylinder; and / or,

[0024] The outer diameter of one end of the air outlet tube that is clamped and connected to the assembly tube is smaller than the inner diameter of the assembly tube, and the maximum outer diameter of one end of the air outlet tube that faces away from the assembly tube is larger than the outer diameter of the connecting tube.

[0025] Optionally, the plurality of connection baffles are provided with connection screw holes, the air inlet ring is provided with a threaded column at a position corresponding to the connection screw hole, the connection screw hole and the threaded column are connected by a first screw, and one end of the assembly tube connected to the air outlet tube is provided with a receiving groove for receiving the first screw, the connection screw hole and / or the threaded column; and / or,

[0026] A limit stop edge is arranged on the inner wall of one end of the assembly tube connected to the air outlet tube, a positioning piece is arranged on the end of the air outlet tube connected to the assembly tube, a positioning groove is arranged on the limit stop edge at a position corresponding to the positioning piece, and the positioning piece is arranged on the extension direction of at least one first card slot among the plurality of first card slots facing the assembly tube; and / or,

[0027] A filter screen is arranged between the connecting tube and the air inlet ring.

[0028] Optionally, the holding part includes: a shell, a battery and a connector, the battery is arranged in the shell, one end cover of the connector is arranged at one end of the shell, and the other end of the connector is connected to the blowing part.

[0029] Optionally, the housing is connected to the connecting piece by snap-fitting, and the connecting piece is connected to the blowing part by screws; and / or,

[0030] The portable fan also includes: a first PCB circuit board, a second PCB circuit board and a third PCB circuit board, the first PCB circuit board is arranged in the shell, the second PCB circuit board is arranged on the connecting member, and the third PCB circuit board is arranged on the fan assembly, the first PCB circuit board and the second PCB circuit board are perpendicular to each other, the first PCB circuit board and the second PCB circuit board are connected by a first conductive member, the second PCB circuit board and the third PCB circuit board are connected by a second conductive member, and the stiffness of the first conductive member is greater than the stiffness of the second conductive member.

[0031] Optionally, the first PCB circuit board is fixedly connected to the inner surface of the housing, the second PCB circuit board is fixedly connected to the connecting member by screws, and the third PCB circuit board is fixedly connected to the fan assembly; and / or,

[0032] The first PCB circuit board is connected to the first control button, the second PCB circuit board is connected to the second control button, the movement path of the first control button after being subjected to force is perpendicular to the first PCB circuit board, and the movement path of the second control button after being subjected to force is parallel to the second PCB circuit board.

[0033] The beneficial effects of the embodiments of the present application are as follows: the fan assembly of the portable fan is disposed in the blowing portion, and the fan assembly is confined to be placed in the space of the extension line member of the first end portion and the second end portion of the holding portion. That is, the length of the fan assembly in the blowing direction is limited to be no greater than the length of the holding portion in the blowing direction. This construction method can keep the center of gravity of the fan assembly and the holding portion consistent, so that the portable fan has greater stability when placed. Secondly, the portable fan will generate a recoil force during the blowing process. When the center of gravity of the fan assembly and the holding portion are inconsistent, the portable fan will turn under the action of the recoil force. Therefore, the relative position relationship between the fan assembly and the holding portion in this embodiment can also prevent the portable fan from deflecting when blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0035] Figure 1 This is a schematic diagram of the overall structure of a portable fan according to a specific embodiment of the present application;

[0036] Figure 2 This is a schematic diagram of the position structure of the holding portion and the fan assembly of a specific embodiment of the present application;

[0037] Figure 3 This is an exploded schematic diagram of a fan assembly according to a specific embodiment of the present application;

[0038] Figure 4 This is a schematic diagram of the overall structure of a portable fan according to a specific embodiment of the present application;

[0039] Figure 5 This is an exploded schematic diagram of an assembly tube and a fan assembly according to a specific embodiment of the present application;

[0040] Figure 6 This is a schematic structural diagram of an assembly cylinder according to a specific embodiment of the present application;

[0041] Figure 7 This is a schematic structural diagram of a connection tube according to a specific embodiment of the present application;

[0042] Figure 8 This is a schematic structural diagram of an air inlet ring according to a specific embodiment of the present application.

[0043] Description of the drawings: 1. Grip; 11. First end; 12. Second end; 13. Shell; 14. Battery; 15. Connector; 2. Blowing part; 21. Air inlet; 22. Air outlet; 23. Connecting tube; 24. Assembly tube; 241. First buckle; 242. First opening; 243. Second connecting spring; 244. Second claw; 245. Storage slot; 246. Limit stop edge; 247. Positioning slot; 25. Air outlet; 251. First slot; 252. Positioning sheet; 253. Second outer surface; 254. Second inner surface; 255. Second arc edge; 26. Air inlet; 261. Connecting tube; 261a. Connecting stop edge, 261b, first connecting spring piece; 261c, first claw; 261d, connecting screw hole; 262, air inlet ring; 262a, first outer surface; 262b, first inner surface; 262c, first arcuate edge; 262d, threaded column; 27, filter; 3, fan assembly; 31, fan motor; 32, fan blades; 33, fan housing; 34, flexible protective cover; 341, dot-shaped protrusions; 41, first PCB circuit board; 42, second PCB circuit board; 43, third PCB circuit board; 44, first control button; 45, second control button; 46, first conductive member; 47, second conductive member. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements between them. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0045] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0046] See also Figure 1 and 2 , Figure 1 This is a schematic diagram of the overall structure of the portable fan of this embodiment; Figure 2 This is a schematic diagram of the position structure of the holding portion and the fan assembly of this embodiment.

[0047] like Figure 1 and Figure 2 As shown, a portable fan comprises: a holding portion 1; a blowing portion 2, which is connected to one end of the holding portion 1 and is provided with an air inlet 21 and an air outlet 22; a fan assembly 3, which is arranged in the blowing portion 2 and is used to push the air flow from the air inlet 21 to the air outlet 22; the holding portion 1 is provided with a first end 11 and a second end 12 opposite to the first end 11 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 extension lines L1 and L2 of the first end 11 and the second end 12 toward the blowing portion 2.

[0048] In this embodiment, the grip portion 1 is constructed as a cuboid, and the side joints of the grip portion 1 are smoothly transitioned by rounded corners. However, the overall structure of the grip portion 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the grip portion 1 is constructed as a cylinder, a polygonal column, a cube, a cartoon figure, etc. (not limited to).

[0049] In this embodiment, the blowing part 2 is configured to be cylindrical. However, the configuration of the blowing part 2 is not limited thereto, and according to different specific application scenarios, in some embodiments, the blowing part 2 can be configured to be (not limited to): prism, barrel, polygon, racetrack, etc.

[0050] See also Figure 3 , Figure 3 Schematic diagram of the structure of the fan assembly of this embodiment.

[0051] like Figure 3 As shown, the fan assembly 3 in this embodiment includes: fan blades 32 and a fan motor 31. A connecting ring is provided inside the blowing part 2 for fixing the fan assembly 3. The fan blades 32 and the fan motor 31 are integrated in a spatial structure reuse manner. However, the structure of the fan blades 32 and the fan motor 31 is not limited to, in some embodiments, the fan blades 32 and the fan motor 31 can be a split structure, that is, the fan blades 32 and the fan motor 31 are only connected by a rotating shaft.

[0052] In some embodiments, the fan assembly 3 further includes: a fan housing 33, the fan blades 32 and the fan motor 31 are both disposed in the fan housing 33, and the fan housing 33 encapsulates the fan blades 32 and the fan motor 31 into a standardized accessory. In this 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 from the top of the fan blade 32 to the tail of the fan motor 31.

[0053] In some embodiments, the fan assembly 3 further includes: a flexible protective cover 34, which is sleeved on the fan housing 33 and is used to increase the stability of the connection between the fan assembly 3 and the blowing part 2. At the same time, the flexible protective cover 34 also has a buffering effect, which can reduce the vibration and noise of the portable fan. In this embodiment, the length of the fan assembly 3 refers to the height of the cylindrical structure of the flexible protective cover 34.

[0054] In some embodiments, the surface of the flexible protective cover 34 is provided with dot-shaped protrusions 341 or annular protrusions (not shown). In some embodiments, the dot-shaped protrusions 341 and the annular protrusions are alternately provided. The dot-shaped protrusions 341 and / or the annular protrusions can enhance the buffering capacity of the flexible protective cover 34, further reduce the vibration and noise of the portable fan, and at the same time, facilitate the assembly of the fan assembly 3 into the blowing part 2.

[0055] In this embodiment, the first end 11 and the second end 12 actually represent the length of the three attribute parameters of the length, width and height of the holding portion 1. Structurally, the overall length of the fan assembly 3 is not greater than the length of the holding portion 1; in terms of positional relationship, the fan assembly 3 is disposed within the range defined by the vertical extension line of the first end 11 and the second end 12.

[0056] In the above-mentioned embodiment, the fan assembly 3 of the portable fan is arranged in the blowing part 2, and the fan assembly 3 is limited to be placed in the space of the extension line member of the first end 11 and the second end 12 of the holding part 1. That is, the length of the fan assembly 3 in the blowing direction is limited to be no greater than the length of the holding part 1 in the blowing direction. This construction method can make the center of gravity of the fan assembly 3 and the holding part 1 consistent, so that the portable fan has stronger stability when placed. Secondly, the portable fan will generate a recoil force during the blowing process. When the center of gravity of the fan assembly 3 and the holding part 1 are inconsistent, the portable fan will turn under the action of the recoil force. Therefore, the relative position relationship between the fan assembly 3 and the holding part 1 in this embodiment can also prevent the portable fan from deflecting when blowing.

[0057] Again, when the speed of the fan assembly 3 is high, for example, when the fan motor 31 of the fan assembly 3 is a three-phase motor, high-frequency vibration will be generated due to the high speed, and the high-frequency vibration will cause the vibration of the entire portable fan, and even cause the portable fan to resonate in certain scenarios. In this embodiment, the fan assembly 3 is limited between the first end and the second end of the grip 1, so that the high-frequency vibration generated by the fan assembly 3 cannot be directly transmitted to the grip 1, but is transmitted from the fan assembly 3 to the blowing part 2, and then from the blowing part 2 to the grip 1. The vibration wave will be attenuated during this transmission process, which greatly reduces the amplitude and energy of the vibration of the grip 1. When the energy attenuation is large, it will break the conditions for resonance, reduce the resonance risk of the portable fan, and improve the comfort of the portable fan. The use of a three-phase motor can make the fan motor 31 rotate at a higher speed, blow out a larger amount of air, and have a more obvious cooling effect.

[0058] However, the type of motor used by the fan motor 31 is not limited to a three-phase motor. In some embodiments, the fan motor 31 can also use a two-phase motor.

[0059] See also Figure 4 , Figure 4 This is a schematic diagram of the overall structure of the portable fan of this embodiment.

[0060] like Figure 4 As shown, in some embodiments, the blowing part 2 includes: a connecting tube 23 , the outer surface of the connecting tube 23 is smooth, the connecting tube 23 is connected to one end of the holding part 1 , and the fan assembly 3 is arranged in the connecting tube 23 .

[0061] When the fan assembly 3 is in operation, the air near the connecting tube 23 will flow toward the air inlet 21 as the negative pressure at the air inlet 21 is formed. The outer surface of the connecting tube 23 is smooth, which can make the air flow smoother and will not form vortices due to obstruction during the flow process, thereby affecting the air intake of the portable fan. Therefore, the blowing efficiency of the portable fan can be improved.

[0062] The fan assembly 3 is fixed in the connecting tube 23. For example, the fan assembly 3 is fixed by a connecting ring that is hollowed out in the connecting tube 23, or the fan assembly 3 is fixed by a connecting rod that is arranged inside the fan assembly 3.

[0063] The connecting tube 23 can be directly connected to the holding portion 1 by means of (but not limited to): screws, gluing, clamping, welding or riveting.

[0064] In some embodiments, the connection between the connecting tube 23 and the holding portion 1 needs to be connected to the holding portion 1 through the connecting member 15, one end of the connecting member 15 is connected to the holding 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 connected in a manner (not limited to): screws, adhesive, clamping, welding or riveting. The connecting tube 23 is directly connected to the holding portion 1 or connected through the connecting member 15, both of which are the connection between the connecting tube 23 and the holding portion 1.

[0065] In some embodiments, along the direction from the air inlet 21 to the air outlet 22, the ratio of the distance from the first end 11 to the second end 12 to the length of the fan assembly 3 is: 1.05-1.35. Within this ratio, the overall shape and blowing efficiency of the portable fan are optimal. When the ratio of the two is greater than 1.35, the ratio of the fan assembly 3 to the holding portion 1 begins to gradually become unbalanced, and the wind-driving ability of the too-small fan assembly 3 decreases. When the ratio of the two is less than 1.05, the ratio of the fan assembly 3 to the holding portion 1 gradually becomes unbalanced. Due to the uneven mass distribution of the fan assembly 3 itself, when the fan assembly 3 gradually becomes larger, its center of gravity distribution will be offset, resulting in insufficient stability of the portable fan. An overly large fan assembly 3 will also cause the entire portable fan to become "top-heavy" and lose its balance ability.

[0066] In some embodiments, a counterweight is provided in the grip portion 1 to keep the portable fan stable when placed. The counterweight is usually a battery 14, but the object is not limited thereto. Depending on the specific application scenario, in some embodiments, the counterweight is a counterweight made of metals such as lead, copper, iron, or a compound or mixture of the above metals. The counterweight and the battery 14 can also serve as the counterweight of the grip portion 1.

[0067] The setting of the counterweight can further improve the placement stability of the holding portion 1, lower the center of gravity of the portable fan, and prevent it from tipping over.

[0068] The blowing portion 2 is arranged from the first end 11 to the second end 12, and the length of the blowing portion 2 is greater than the distance from the first end 11 to the second end 12. The fan assembly 3 is arranged in the blowing portion 2, and the length of the blowing portion 2 is greater than the distance from the first end 11 to the second end 12, that is, the length of the blowing portion 2 is greater than the length of the holding portion 1. When the length of the blowing portion 2 is greater than the length of the holding portion 1, the airflow has a certain beam space when entering the blowing portion 2 and flowing out of the blowing portion 2, which can make the airflow entering the fan assembly 3 mixed, so that it has a uniform flow direction and flow speed; similarly, the airflow flowing out of the blowing portion 2 can also be mixed, so that it has a uniform flow direction and flow speed, thereby improving the blowing efficiency of the portable fan as a whole.

[0069] Furthermore, when the fan assembly 3 is working, a negative pressure wind zone will be formed around the air inlet 21, and a positive pressure wind zone will be formed in the air outlet 22. The negative pressure wind zone at the air inlet 21 will cause the surrounding airflow to converge to the air inlet 21. If the length of the blowing part 2 is too short, so that the air inlet 21 is flush with the holding part 1 or inside the holding part 1, when the surrounding airflow converges, the holding part 1 itself will become an obstacle to the flow of airflow, causing turbulence or vortex in the flowing airflow, reducing the air intake efficiency. When the length of the blowing part 2 is greater than the length of the holding part 1, there is a gap between the air inlet 21 and the holding part 1, and the holding part 1 no longer becomes an obstacle for the surrounding airflow to flow to the air inlet 21, which greatly improves the air intake efficiency of the portable fan. The positive pressure wind area formed by the air outlet 22 will cause the airflow around the air outlet 22 to flow in all directions. If the length of the blowing part 2 is too short, so that the air outlet 22 is flush with the holding part 1 or inside the holding part 1, the airflow blown out of the air outlet 22 will flow along the holding part 1 due to the wall attachment effect, reducing the air outlet efficiency, or the airflow blown out of the air outlet 22 will collide with the holding part 1 and generate a cyclone, which also reduces the air outlet efficiency. When the length of the blowing part 2 is greater than the length of the holding part 1, there is a gap between the air outlet 22 and the holding part 1, which can prevent the airflow from colliding with the holding part 1 or generating the wall attachment effect, greatly improving the air outlet efficiency of the portable fan.

[0070] In some embodiments, the ratio of the length of the blowing portion 2 to the distance from the first end 11 to the second end 12 is: 1.1-1.5. Within this ratio, the air intake and air outlet efficiency of the portable fan reaches the optimum. When the ratio of the two is greater than the ratio of 1.5, the proportion of the blowing portion 2 and the holding portion 1 is out of balance, the excessively long air outlet makes the distance from the air inlet 21 to the fan assembly 3 too long, the air intake mixed flow space is too large, and the excessively long air outlet increases the contact area between the airflow and the inner wall space of the blowing portion 2, resulting in large air intake noise. The excessively long air outlet also makes the distance from the fan assembly 3 to the air outlet 22 too long, which also leads to large air outlet noise and low air outlet efficiency. When the ratio of the two is less than the ratio of 1.1, the excessively short air outlet makes the distance from the air inlet 21 to the fan assembly 3 too short, and the airflow entering therein cannot be well beamed, causing more turbulent airflow entering the fan blades 32, affecting the efficiency of the fan blades 32. An excessively short air outlet portion causes the distance between the air outlet 22 and the fan assembly 3 to be too short, thereby causing the airflow blown out of the air outlet 22 to be too dispersed and have poor directivity.

[0071] The distance from the first end 11 to the second end 12 is greater than the thickness of the grip 1 in the direction perpendicular to the first end 11 to the second end 12. That is, from the perspective of "length, width and height", the length of the grip 1 is greater than the width of the grip 1. This shape combined with the barrel-shaped blowing part 2 makes the overall shape of the portable fan more coordinated.

[0072] See also Figure 5 , Figure 5It is an exploded schematic diagram of the assembly tube and the fan assembly of this embodiment.

[0073] like Figure 5 As shown, in some embodiments, the blowing unit 2 further includes: an assembly cylinder 24, which is arranged in the connecting cylinder 23, and the fan assembly 3 is arranged in the connecting cylinder 23. The assembly cylinder 24 is arranged in the connecting cylinder 23, and the assembly cylinder 24 is connected to the fan assembly 3.

[0074] In some embodiments, the assembly tube 24 and the connection tube 23 are made of different materials. For example, the connection tube 23 is made of metal material, while the assembly tube 24 is made of plastic material. The material of the assembly tube 24 is more plastic. Therefore, the assembly tube 24 and the connection tube 23 are manufactured separately, which can greatly improve the assembly efficiency and external aesthetics of the portable fan. It can ensure that the outer surface of the connection tube 23 is smooth and easy to grasp.

[0075] However, the relationship between the assembly cylinder 24 and the connecting cylinder 23 is not limited to this. Depending on the specific application scenario, the assembly cylinder 24 and the connecting cylinder 23 can be made of the same material through integrated processing and manufacturing technology. In this embodiment, the assembly cylinder 24 and the connecting cylinder 23 should be distinguished based on the function of the overall component, rather than by whether the component is independent.

[0076] See also Figure 6-8 , Figure 6 It is a structural schematic diagram of the assembly tube of this embodiment; Figure 7 It is a structural schematic diagram of the connecting tube of this embodiment; Figure 8 Schematic diagram of the structure of the air inlet ring of this embodiment.

[0077] like Figure 6-8 As shown, in some embodiments, the blowing part 2 also includes: an air inlet tube 26 and an air outlet tube 25, the air inlet 21 is opened on the air inlet tube 26, the air outlet 22 is opened on the air outlet tube 25, and the air inlet tube 26 and the air outlet tube 25 are respectively clamped and connected to the two ends of the assembly tube 24.

[0078] The air inlet tube 26 and the air outlet tube 25 are respectively arranged at both ends of the assembly tube 24, and can clamp the connecting tube 23 to prevent the assembly tube 24 from falling from the connecting tube 23. The air inlet tube 26 and the air outlet tube 25 are fixed by a clamping method, which facilitates the assembly and disassembly of the air inlet tube 26 and the air outlet tube 25.

[0079] The surface of the air inlet tube 26 is raised to form a plurality of connection retaining edges 261a, and two adjacent connection retaining edges 261a are connected by a first connection spring piece 261b, and a first claw 261c is provided on the side of the first connection spring piece 261b facing the connection tube 23, and a first buckle 241 that cooperates with the first claw 261c is provided on the surface of one end of the assembly tube 24 connected to the air inlet tube 26. The setting of the connection retaining edges 261a reduces the overall volume of the air inlet tube 26, and less material is required to make the air inlet tube 26. The space between the two connection retaining edges 261a can also be used to set the first claw 261c, so that the first claw 261c has space for compression deformation. This method cleverly utilizes the surface space of the air inlet tube 26, makes the connection between the air inlet tube 26 and the assembly tube 24 more clever, and improves the space utilization rate.

[0080] The surface of the air outlet cylinder 25 facing the connecting cylinder 23 is indented to form a plurality of first slots 251, and a plurality of first openings 242 are correspondingly provided at one end of the assembly cylinder 24 facing the air outlet cylinder 25, and a second connecting elastic piece 243 is provided in each of the plurality of first openings 242, and a second claw 244 cooperating with the first slot 251 is provided on the side of the second connecting elastic piece 243 facing the fan assembly 3. Similarly, the connection method between the assembly cylinder 24 and the air outlet cylinder 25 is to cleverly open the first opening 242 on the surface of the assembly cylinder 24, and to open the second connecting elastic piece 243 at the position of the first opening 242, so that the assembly cylinder 24 can be connected with the air outlet cylinder 25 without providing a protruding structure, which reasonably utilizes the space structure and improves the space utilization rate of the assembly.

[0081] It should be pointed out that the connection method between the air inlet duct 26 and the air outlet duct 25 and the assembly duct 24 is not limited to this. Depending on the specific application scenario, the connection method between the air inlet duct 26 and the air outlet duct 25 and the assembly duct 24 can be (not limited to): gluing, screw connection, riveting, etc.

[0082] In some embodiments, the assembly cylinder 24 and the air inlet cylinder 26 or the air outlet cylinder 25 can be manufactured using an integrated manufacturing technology.

[0083] In some embodiments, the length of the first inner surface 262b of the end of the air inlet 26 facing away from the fan assembly 3 is less than the length of the first outer surface 262a, and the first inner surface 262b and the first outer surface 262a are smoothly transitioned to form a first arcuate edge 262c. That is, the length of the first inner surface 262b extending outward is less than the length of the first outer surface 262a extending outward, so that the ends of the first inner surface 262b and the first outer surface 262a will form a length difference, and this length difference is connected through the first arcuate edge 262c, so that the edge of the air inlet 21 forms a smooth edge shaped like a "bell mouth". When the air inlet 21 is entering, the first arcuate edge 262c has a guiding effect on the airflow entering therein, and its smooth lines can also prevent the airflow from having a rough contact with the side, so that the air intake efficiency of the portable fan can be improved and the wind noise of the air intake can be reduced.

[0084] In some embodiments, the length of the second inner surface 254 of the end of the air outlet 25 facing away from the fan assembly 3 is less than the length of the second outer surface 253, and the second inner surface 254 and the second outer surface 253 are smoothly transitioned to form a second arc edge 255. That is, the length of the second inner surface 254 extending outward is less than the length of the second outer surface 253 extending outward, so that the ends of the second inner surface 254 and the second outer surface 253 will form a length difference, and this length difference is connected through the second arc edge 255, so that the edge of the air outlet 22 forms a smooth edge shaped like a "bell mouth". When the air outlet 22 discharges air, the second arc edge 255 has a guiding effect on the outflowing airflow. When the airflow flows out, the arc surface of the second arc edge 255 forms a wall effect, which quickly releases the high-speed airflow and increases the flow area of ​​the airflow in the blowing direction. Its smooth lines can also avoid the airflow from being in a stiff contact with the side, so that the air outlet efficiency of the portable fan can be improved, the blowing area can be increased, and the wind noise of the air outlet can be reduced.

[0085] In some embodiments, the air inlet cylinder 26 includes: a connection cylinder 261 and an air inlet ring 262, a plurality of connection baffles 261a, a first connection spring sheet 261b and a first claw 261c are all arranged on the connection cylinder 261, the connection cylinder 261 and the air inlet ring 262 are detachably connected, the maximum outer diameter of the connection cylinder 261 is smaller than the inner diameter of the assembly cylinder 24, and the maximum outer diameter of the air inlet ring 262 is larger than the outer diameter of the connection cylinder 23. The air inlet cylinder 26 can be disassembled into: a connection cylinder 261 and an air inlet ring 262. Although the assembly process is increased, the detachable structure allows the connection between the assembly cylinder 24 and the air inlet cylinder 26 to have more adjustable space and higher fault tolerance during assembly.

[0086] In this embodiment, the first inner surface 262 b and the first outer surface 262 a are both disposed on the air inlet ring 262 , and the first arc-shaped edge 262 c is also disposed on the air inlet ring 262 .

[0087] A plurality of connection retaining edges 261a are provided with connection screw holes 261d, and the air inlet ring 262 is provided with a threaded column 262d at a position corresponding to the connection screw hole 261d. The connection screw hole 261d and the threaded column 262d are connected by a first screw, and a receiving groove 245 for receiving the first screw, the connection screw hole 261d and / or the threaded column 262d is provided at one end of the assembly cylinder 24 connected to the air outlet cylinder 25. The receiving groove 245 can receive one or more of the first screw, the connection screw hole 261d or the threaded column 262d. The screw connection enables the connection between the assembly cylinder 24 and the air inlet cylinder 26 to be adjusted, and has a higher fault tolerance during assembly. The connection screw hole 261d is provided on the connection retaining edge 261a, and two connection modes are provided between the connection retaining edge 261a and the adjacent connection retaining edge 261a through reasonable use of space, thereby improving the space utilization efficiency. The opening of the receiving groove 245 can prevent the first screw from protruding from the surface of the assembly tube 24, thereby facilitating assembly.

[0088] The detachable connection method between the connecting tube 261 and the air inlet ring 262 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connecting tube 261 and the air inlet ring 262 can also be connected by a snap-fit ​​method.

[0089] In some embodiments, the connecting tube 261 and the air inlet ring 262 can be prepared and formed by an integrated molding manufacturing technology.

[0090] The outer diameter of one end of the air outlet tube 25 connected to the assembly tube 24 is smaller than the inner diameter of the assembly tube 24 , and the maximum outer diameter of one end of the air outlet tube 25 facing away from the assembly tube 24 is larger than the outer diameter of the connecting tube 23 .

[0091] The outer diameter of the end of the air outlet tube 25 and the connecting tube 261 connected to the assembly tube 24 is smaller than the inner diameter of the assembly tube 24, so that the end of the air outlet tube 25 and the connecting tube 261 connected to the assembly tube 24 can be inserted into the assembly tube 24. The maximum outer diameter of the end of the air outlet tube 25 away from the assembly tube 24 and the air inlet ring 262 is larger than the outer diameter of the connecting tube 23, which can clamp and limit the connecting tube 23 to prevent the assembly tube 24 and the connecting tube 23 from separating or shifting.

[0092] In some embodiments, a limited stop edge 246 is provided on the inner wall of one end of the assembly cylinder 24 connected to the air outlet cylinder 25, a positioning piece 252 is provided at one end of the air outlet cylinder 25 connected to the assembly cylinder 24, and a positioning groove 247 is provided on the limited stop edge 246 at a position corresponding to the positioning piece 252, and the positioning piece 252 is provided in the extension direction of at least one first card slot 251 among the plurality of first card slots 251 facing the assembly cylinder 24. The provision of the positioning piece 252 and the positioning groove 247 facilitates the clamping assembly of the air outlet cylinder 25 and the assembly cylinder 24. The provision of the positioning piece 252 in the extension direction of the first card slot 251 facing the assembly cylinder 24 makes it easier to assemble the first card slot 251 with the second connecting elastic piece 243 and the second claw 244.

[0093] In some embodiments, a filter 27 is disposed between the connecting tube 23 and the air inlet ring 262. The filter 27 can prevent debris and the user's hair or clothes from being drawn into the fan assembly 3, thus providing good protection. The filter 27 is disposed between the connecting tube 23 and the air inlet ring 262, so that the filter 27 can be easily installed and replaced.

[0094] In some embodiments, the holding portion 1 includes: a shell 13, a battery 14 and a connector 15, the battery 14 is disposed in the shell 13, one end cover of the connector 15 is disposed at one end of the shell 13, and the other end of the connector is connected to the blowing portion 2.

[0095] The blowing part 2 and the holding part 1 are connected by the connecting piece 15, so that the blowing part 2 and the holding part 1 are independent of each other, which is convenient for disassembly and maintenance of one of them separately. At the same time, since the blowing part 2 and the holding part 1 both have predetermined functional shapes, their specific shapes are not convenient for connection and fixation. The connecting piece 15 is used to connect the two. The connecting piece 15 can be adaptively deformed and docked according to the different shape requirements of the blowing part 2 and the holding part 1, thereby improving the stability of the connection. For example, an arc groove is provided at one end of the connecting piece 15 connected to the blowing part 2, and the end of the connecting piece 15 connected to the holding part 1 is constructed to have a shape similar to the outer shape of the holding part 1.

[0096] In some embodiments, the connector 15 is connected to the blowing part 2 by screws, and the connector 15 is connected to the housing 13 by snap-fitting. However, the connection between the connector 15 and the blowing part 2 is not limited thereto. Depending on the specific application scenario, in some embodiments, the connector 15 and the blowing part 2 can be connected and fixed by (but not limited to): gluing, snap-fitting, riveting, welding, etc. The connector 15 and the housing 13 can be connected and fixed by (but not limited to): interference fit, screw connection, riveting, gluing, welding, etc.

[0097] The portable fan also includes: a first PCB circuit board 41, a second PCB circuit board 42 and a third PCB circuit board 43. The first PCB circuit board 41 is arranged in the shell 13, the second PCB circuit board 42 is arranged on the connecting member 15, and 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 perpendicular to each other. The first PCB circuit board 41 and the second PCB circuit board 42 are connected by a first conductive member 46, and the second PCB circuit board 42 and the third PCB circuit board 43 are connected by a second conductive member 47. The stiffness of the first conductive member 46 is greater than or equal to the stiffness of the second conductive member 47.

[0098] 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, which can not only increase the assembly area of ​​various electronic components of the portable fan, but also effectively avoid the problem of large electromagnetic interference caused by dense assembly of electronic components, and effectively reduce the electronic interference intensity between different circuit boards. At the same time, the PCB circuit boards at different positions can also avoid excessive concentration of heat from electronic components, thereby improving the heat dissipation efficiency of the portable fan.

[0099] The rigidity of the first conductive member 46 is greater than that of the second conductive member 47, so that the second PCB circuit board 42 has a greater support force on the first PCB circuit board 41. With the structure that the first PCB circuit board 41 and the second PCB circuit board 42 are perpendicular to each other, the second PCB circuit board 42 has a supporting effect on the first PCB circuit board 41, preventing the first PCB circuit board 41 from being displaced toward the inside of the housing 13 under the action of external force. The rigidity of the second conductive member 47 is relatively small, which facilitates the installation of the blowing part 2 and the connecting member 15.

[0100] In some embodiments, the first conductive member 46 is a motor component pin or a welded prismatic iron metal rod, and the second conductive member 47 is a wire, a flat cable or a flexible circuit board.

[0101] The first PCB circuit board 41 is fixedly connected to the inner surface of the housing 13, the second PCB circuit board 42 is fixedly connected to the connecting member 15 by screws, and the third PCB circuit board 43 is fixedly connected to the fan assembly 3. The first PCB circuit board 41 is connected by a clamping connection, which is convenient for assembly and disassembly. The second PCB circuit board 42 is fixedly connected to the connecting member 15 by screws. Since the second PCB circuit board 42 needs to support the first PCB circuit board 41, the better the installation stability of the second PCB circuit board 42, the higher the limit or support degree of the first PCB circuit board 41. The third PCB circuit board 43 is fixedly connected to the fan assembly 3, which is convenient for assembly and disassembly, and can serve as a dust cover for the fan assembly 3.

[0102] In some embodiments, the first PCB circuit board 41 is connected to the first control button 44, the second PCB circuit board 42 is connected to the second control button 45, the movement path of the first control button 44 after being subjected to force is perpendicular to the first PCB circuit board 41, and the movement path of the second control button 45 after being subjected to force is parallel to the second PCB circuit board 42. Since the first PCB circuit board 41 is fixed by snap connection, and the second PCB circuit board 42 can support the first PCB circuit board 41, the first PCB circuit board 41 has a higher force strength in its vertical direction, and is suitable for assembling the first control button 44 that moves in its vertical direction. The second PCB circuit board 42 is fixed to the connector 15 by screws, has a large suspended area, and has a weak vertical force bearing capacity. However, due to the screw fixation, it has a strong anti-rotation ability, the movement path of the second control button 45 after being subjected to force is parallel to the second PCB circuit board 42, and the second PCB circuit board 42 can well resist the steering force or deflection force applied to the second control button 45 when in use.

[0103] The term "plurality" in this embodiment refers to a number of two or more.

[0104] It should be noted that any implementation in this embodiment can be implemented independently or in combination with one or more other implementations. When implemented in combination, the combination method should not be limited to the combination methods listed in this embodiment.

[0105] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not intended to be additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A portable fan, characterized in that: include: Grip part; A blowing part, the blowing part is connected to one end of the holding part, and the blowing part is provided with an air inlet and an air outlet; A fan assembly, the fan assembly being disposed in the blowing portion and being used to push the air flow from the air inlet to the air outlet; The holding portion is provided with a first end portion and a second end portion opposite to the first end portion along a direction from the air inlet to the air outlet, and the fan assembly is arranged in a space defined by an extension line of the first end portion and the second end portion toward the blowing portion.

2. The portable fan according to claim 1, characterized in that: The blowing part comprises: a connecting tube, the outer surface of which is smooth, the connecting tube is connected to one end of the holding part, and the fan assembly is arranged in the connecting tube; and / or, Along the direction from the air inlet to the air outlet, 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; and / or, A counterweight is provided in the holding portion so that the portable fan remains stable when placed; and / or, The blowing portion is arranged from the first end to the second end, and the length of the blowing portion is greater than the distance from the first end to the second end; and / or, The fan assembly includes a three-phase motor.

3. The portable fan according to claim 2, characterized in that: The blowing part further includes: an assembly cylinder, the assembly cylinder is arranged in the connecting cylinder, and the fan assembly is arranged in the connecting cylinder; and / or, The ratio of the length of the blowing portion to the distance from the first end to the second end is: 1.1-1.5; and / or, The distance from the first end to the second end is greater than the thickness of the holding portion in a direction perpendicular to the first end to the second end.

4. The portable fan according to claim 3, characterized in that: The blowing part further comprises: an air inlet tube and an air outlet tube, the air inlet is arranged on the air inlet tube, the air outlet is arranged on the air outlet tube, and the air inlet tube and the air outlet tube are respectively connected to the two ends of the assembly tube by snap-fitting.

5. The portable fan according to claim 4, characterized in that: The surface of the air inlet cylinder is raised to form a plurality of connecting baffles, two adjacent connecting baffles are connected by a first connecting spring sheet, a first claw is provided on the side of the first connecting spring sheet facing the connecting cylinder, and a first buckle cooperating with the first claw is provided on the surface of one end of the assembly cylinder connected to the air inlet cylinder; and / or, The surface of the air outlet cylinder facing the connecting cylinder is indented to form a plurality of first slots, and a plurality of first openings are correspondingly opened at one end of the assembly cylinder facing the air outlet cylinder, and a second connecting elastic piece is arranged in each of the plurality of first openings, and a second claw cooperating with the first slot is arranged on the side of the second connecting elastic piece facing the fan assembly; and / or, The length of the first inner surface of the end of the air inlet cylinder facing away from the fan assembly is smaller than the length of the first outer surface, and the first inner surface and the first outer surface smoothly transition to form a first arc-shaped edge; and / or, The length of the second inner surface of the end of the air outlet tube facing away from the fan assembly is smaller than the length of the second outer surface, and the second inner surface and the second outer surface are smoothly transitioned to form a second arc-shaped edge.

6. The portable fan according to claim 5, characterized in that The air inlet cylinder comprises: a connecting cylinder and an air inlet ring, the multiple connecting baffles, the first connecting spring sheet and the first claw are all arranged on the connecting cylinder, the connecting cylinder is detachably connected to the air inlet ring, the maximum outer diameter of the connecting cylinder is smaller than the inner diameter of the assembly cylinder, and 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 tube that is clamped and connected to the assembly tube is smaller than the inner diameter of the assembly tube, and the maximum outer diameter of one end of the air outlet tube that faces away from the assembly tube is larger than the outer diameter of the connecting tube.

7. The portable fan according to claim 6, characterized in that The plurality of connection baffles are each provided with connection screw holes, the air inlet ring is provided with a threaded column at a position corresponding to the connection screw hole, the connection screw hole and the threaded column are connected by a first screw, and the end of the assembly tube connected to the air outlet tube is provided with a receiving groove for receiving the first screw, the connection screw hole and / or the threaded column; and / or, A limit stop edge is arranged on the inner wall of one end of the assembly tube connected to the air outlet tube, a positioning piece is arranged on the end of the air outlet tube connected to the assembly tube, a positioning groove is arranged on the limit stop edge at a position corresponding to the positioning piece, and the positioning piece is arranged on the extension direction of at least one first card slot among the plurality of first card slots facing the assembly tube; and / or, A filter screen is arranged between the connecting tube and the air inlet ring.

8. The portable fan according to claim 1, characterized in that The holding part comprises: a shell, a battery and a connecting piece, wherein the battery is arranged in the shell, an end cover of the connecting piece is arranged at one end of the shell, and the other end of the connecting piece is connected to the blowing part.

9. The portable fan according to claim 8, characterized in that The housing is connected to the connecting piece by snapping, and the connecting piece is connected to the blowing part by screws; and / or, The portable fan also includes: a first PCB circuit board, a second PCB circuit board and a third PCB circuit board, the first PCB circuit board is arranged in the shell, the second PCB circuit board is arranged on the connecting member, and the third PCB circuit board is arranged on the fan assembly, the first PCB circuit board and the second PCB circuit board are perpendicular to each other, the first PCB circuit board and the second PCB circuit board are connected by a first conductive member, the second PCB circuit board and the third PCB circuit board are connected by a second conductive member, and the stiffness of the first conductive member is greater than the stiffness of the second conductive member.

10. The portable fan according to claim 9, characterized in that The first PCB circuit board is fixedly connected to the inner surface of the housing, the second PCB circuit board is fixedly connected to the connecting member by screws, and the third PCB circuit board is fixedly connected to the fan assembly; and / or, The first PCB circuit board is connected to the first control button, the second PCB circuit board is connected to the second control button, the movement path of the first control button after being subjected to force is perpendicular to the first PCB circuit board, and the movement path of the second control button after being subjected to force is parallel to the second PCB circuit board.

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