A fan body and a portable fan thereof

Abstract

The utility model relates to fan technical field more specifically, relate to a fan main body and its portable fan, wherein fan main body, including fan head, fan head includes shell, connecting casing, air inlet casing and air outlet casing, the shell is the tubular structure of two ends opening, the both ends of shell are air inlet end and air outlet end respectively, air inlet casing sets up in the air inlet end of shell, air outlet casing sets up in the air outlet end of shell, air outlet casing includes first outer tube portion, first inner tube portion and a plurality of first connecting plate, the end portion of connecting casing towards the end portion of first outer tube portion towards the air inlet end of shell is closely abuts, first inner tube portion is located first outer tube portion inboard, first inner tube portion includes the pressure surface that increases radially from the air inlet end of shell to the air outlet end direction of shell, a plurality of first connecting plate are along the circumferential interval between first outer tube portion and first inner tube portion and set up. The utility model can effectively improve the air supply distance, promote the use experience of user.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and more specifically, to a fan body and its portable fan. Background Technology

[0002] Portable fans, also known as handheld fans, are small and lightweight, fulfilling the need for portability to a certain extent. When in use, portable fans draw air in from the fan's inlet and blow it out from the outlet, achieving a cooling effect. However, most current portable fans have a simple outlet design, resulting in slow airflow and a short delivery distance, leading to a poor user experience. Utility Model Content

[0003] One objective of this utility model is to provide a fan body that can effectively improve the air delivery distance, and another objective of this utility model is to provide a portable fan.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a fan body, including a fan head, the fan head including a shell, a connecting shell disposed inside the shell, an air inlet shell with an air inlet channel, and an air outlet shell with an air outlet channel. The shell is a cylindrical structure with openings at both ends, the two ends of the shell being the air inlet end and the air outlet end, respectively. The air inlet shell is disposed at the air inlet end of the shell, and the air outlet shell is disposed at the air outlet end of the shell. The air outlet shell includes a first outer cylinder portion, a first inner cylinder portion, and a plurality of first connecting plates. The end of the connecting shell facing the air outlet end of the shell is in close contact with the end of the first outer cylinder portion facing the air inlet end of the shell. The first inner cylinder portion is located inside the first outer cylinder portion. The first inner cylinder portion includes a pressure surface that increases radially from the air inlet end of the shell to the air outlet end of the shell. The plurality of first connecting plates are circumferentially spaced between the first outer cylinder portion and the first inner cylinder portion, and the interval between two adjacent first connecting plates forms the air outlet channel.

[0005] Furthermore, the connecting housing includes a second outer cylinder portion with at least a portion of equal diameter, the end of the second outer cylinder portion facing the air outlet end of the housing being tightly abutted against the end of the first outer cylinder portion facing the air inlet end of the housing; the fan head also includes a fan assembly located inside the second outer cylinder portion, the fan assembly including fan blades and a motor assembly for driving the fan blades to rotate, the motor assembly being mounted on the side of the air outlet housing facing the air inlet end of the housing and connected to the fan blades.

[0006] Furthermore, the fan blade includes an assembly cylinder, a hub, and a plurality of blades evenly spaced along the circumference of the hub and fixed to the outer wall of the hub. The hub is a cover structure with one end open and the other end sealed. The assembly cylinder is located at the open end of the hub and is at least partially located inside the hub. A portion of the motor assembly is assembled inside the assembly cylinder. The interior of the hub is provided with a first mounting sleeve connected to the output shaft of the motor assembly. A plurality of reinforcing plates are provided between the outer wall of the first mounting sleeve and the inner wall of the hub along the circumference of the first mounting sleeve.

[0007] Furthermore, the hub includes a wind guide section and a blade connecting section connected along the axial direction of the hub, and a number of blades are evenly fixed on the outer wall of the blade connecting section along the circumference of the hub; the axial length L1 of the wind guide section is 1 / 10 to 3 / 10 of the axial length L0 of the entire hub.

[0008] Furthermore, the connecting housing also includes a second inner cylinder portion, which is located inside the second outer cylinder portion, and the end of the second inner cylinder portion near the air outlet end of the outer casing is fixedly connected to the end of the second outer cylinder portion near the air outlet end of the outer casing; the second inner cylinder portion includes an inner surface portion that is disposed toward the hub and at least partially increases radially from the air inlet end of the outer casing toward the air outlet end of the outer casing.

[0009] Furthermore, the first outer cylinder portion extends outward beyond the first inner cylinder portion on the side facing the air outlet end of the outer casing, and the first outer cylinder portion is connected to a portion of the top side of the first connecting plate; the second outer cylinder portion extends forward on the side facing the air outlet end of the outer casing to form a second outer cylinder extension portion, the second outer cylinder extension portion abuts against the end of the first outer cylinder portion facing the air inlet end of the outer casing, and the inner sidewall of the second outer cylinder extension portion smoothly transitions to the inner sidewall of the first outer cylinder portion, and the inner sidewall of the second outer cylinder extension portion abuts against the top side of the first connecting plate.

[0010] Furthermore, the first outer cylinder portion includes a first outer cylinder connecting portion and a first outer cylinder extension portion. One end of the first outer cylinder connecting portion abuts against the second outer cylinder extension portion, and the other end is connected to the first outer cylinder extension portion. The first outer cylinder extension portion is flared.

[0011] Furthermore, the first inner cylinder is a cylindrical structure with openings at both ends. A mounting partition is provided radially inside the first inner cylinder. The motor assembly is mounted on the side of the mounting partition facing the air inlet end of the outer casing. A first cover is provided at the end of the first inner cylinder facing the air outlet end of the outer casing. The front surface of the first cover is set as a plane, a concave surface formed by backward indentation, or a convex surface formed by forward outward convexity. A lighting assembly is provided between the side of the mounting partition facing the air outlet end of the outer casing and the first cover.

[0012] Furthermore, the lighting assembly includes a mounting base and an LED bead board. The mounting base is fitted onto the side of the mounting partition facing the air outlet end of the housing. The side of the mounting base facing the air outlet end of the housing is recessed inward to form a receiving cavity. The LED bead board is disposed inside the receiving cavity. The first cover is detachably connected to the cavity opening of the mounting base. The side wall of the mounting base located between the end of the first inner cylinder and the first cover is made of transparent or semi-transparent material.

[0013] Furthermore, the first connecting plate has a flat plate structure and is arranged on the outer wall of the first inner cylinder along the axial direction of the first inner cylinder.

[0014] Alternatively, the first connecting plate may be bent and inclined along the circumference of the first inner cylinder from the air outlet end of the outer shell to the air inlet end of the outer shell, so that the two opposite sides of the first connecting plate form an outward convex surface and an inward concave surface, respectively, with the outward convex surface facing the air inlet end of the outer shell and the inward concave surface facing the air outlet end of the outer shell.

[0015] Furthermore, a fixing protrusion is fixedly provided on the outer side wall of the air inlet housing, and the fixing protrusion is detachably provided at the air inlet end of the housing by means of a first fastener;

[0016] Or / and the end of the connecting housing facing the air inlet end of the outer shell is connected to an assembly ring, and the air inlet housing is connected to the assembly ring by a snap-fit ​​structure.

[0017] A portable fan includes the aforementioned fan body and a fixing structure for fixing the fan body to another object. The fan body also includes a base, the fan head is disposed on the base, and the base is connected to the fixing structure.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The inner wall of the first outer cylinder and the pressurizing surface of the first inner cylinder of this invention cause the cross-sectional area of ​​the air outlet channel to gradually decrease from the air inlet end of the outer shell to the air outlet end of the outer shell. This can pressurize the air, which is beneficial to increasing the airflow velocity and air delivery distance, thereby improving the user experience. In addition, the first connecting plate can sort and transform the airflow flowing through the air outlet shell, which can guide the airflow, further increase the air delivery distance, and make the air outlet smoother. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1This is a schematic diagram of the fan body in Embodiment 1 of this utility model;

[0022] Figure 2 This is a cross-sectional view of the fan head in Embodiment 1 of this utility model (the arrows in the figure indicate the direction of airflow).

[0023] Figure 3 This is a cross-sectional view of the assembly of the fan assembly and the air outlet housing in Embodiment 1 of this utility model;

[0024] Figure 4 This is a schematic diagram of the assembly ring structure in Embodiment 1 of this utility model;

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a schematic diagram of the air inlet housing and filter element in Embodiment 1 of this utility model;

[0027] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0028] Figure 8 This is a schematic diagram of the fan body in Embodiment 2 of this utility model;

[0029] Figure 9 This is a cross-sectional view of the fan head in Embodiment 2 of this utility model (the arrows in the figure indicate the direction of airflow).

[0030] Figure 10 This is a schematic diagram of the assembly structure of the air outlet housing and fan assembly in Embodiment 2 of this utility model;

[0031] Figure 11 This is an exploded view of the fan head in Embodiment 2 of this utility model;

[0032] Figure 12 for Figure 11 Enlarged view of point C in the middle;

[0033] Figure 13 This is a schematic diagram of the air inlet housing in Embodiment 2 of this utility model;

[0034] Figure 14 This is a structural schematic diagram of the air inlet housing from another angle in Embodiment 2 of this utility model;

[0035] Figure 15 This is a schematic diagram of the structure of the fixing protrusion on the progress shell in Embodiment 2 of this utility model;

[0036] Figure 16 This is a schematic diagram of the gripper structure in Embodiment 3 of this utility model;

[0037] Figure 17 This is a schematic diagram of the gripper structure from another angle in Embodiment 3 of this utility model;

[0038] Figure 18 This is a partial structural diagram of the gripper structure in Embodiment 3 of this utility model;

[0039] Figure 19 This is a schematic diagram of the cover portion of the gripper structure in Embodiment 3 of this utility model;

[0040] Figure 20 for Figure 19 Sectional view at point AA;

[0041] Figure 21 This is a schematic diagram of the press-fit buckle structure in Embodiment 3 of this utility model. Detailed Implementation

[0042] To facilitate understanding of this utility model, a more detailed description is provided below with reference to 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 one or more intermediate elements may exist between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0044] Example 1

[0045] This embodiment is an example 1 of a fan body, including a fan head 3, as shown. Figures 1-7 As shown, in this embodiment, the fan head 3 includes a housing 31, a fan assembly 32, an air inlet housing 33, and an air outlet housing 34. The housing 31 is a cylindrical housing open at both ends, with an air inlet A and an air outlet B at the two ends. External air enters the housing 31 from the air inlet A and exits from the air outlet B. The fan assembly 32 is located inside the housing 31. The air inlet housing 33 is located at the air inlet end of the housing 31 and has an air inlet channel. The air outlet housing 34 is located at the air outlet end of the housing 31 and has an air outlet channel.

[0046] like Figure 2 As shown, in this embodiment, the fan head 3 also includes a connecting housing 37, which is fixedly disposed inside the outer casing 31. In this embodiment, the air inlet housing 33 is detachably connected to the end of the connecting housing 37 facing the air inlet end of the outer casing. Specifically, as shown... Figure 2 and Figure 4 As shown, in this embodiment, an assembly ring 39 is connected to the side of the connecting housing 37 facing the air inlet end of the outer casing 31, and the assembly ring 39 is connected to the air inlet end of the outer casing 31. As a preferred technical solution, the connection method between the assembly ring 39 and the air inlet end of the outer casing 31 can be a screw connection, a snap-fit ​​connection, or a plug-in connection, etc. These connection methods are merely examples and not restrictive provisions. Furthermore, in this embodiment, the assembly ring 39 is located inside the outer casing 31, that is, the end of the assembly ring 39 does not extend outward beyond the end of the outer casing 31.

[0047] In this embodiment, the air inlet housing 33 is detachably connected to the assembly ring 39. For example... Figure 2 and Figure 6 As shown, in this embodiment, the air inlet housing 33 is configured as a cylindrical structure with one open end. In this embodiment, the diameter of the open end of the air inlet housing 33 is slightly larger than the diameter of the closed end of the air inlet housing 33. Figure 2 and Figure 4 As shown, in this embodiment, the assembly ring 39 has an assembly recess 392 on the side facing the air inlet housing 33. The open end of the air inlet housing 33 can be inserted into the assembly recess 392 of the assembly ring 39, which facilitates accurate positioning of the air inlet housing 33 during assembly and helps to improve the installation efficiency of the air inlet housing 33.

[0048] like Figures 4-7 As shown, in this embodiment, the air inlet housing 33 and the assembly ring 39 are detachably connected via a snap-fit ​​structure 5. Specifically, as... Figures 4-7 As shown, in this embodiment, the snap-fit ​​structure 5 includes a snap-fit ​​groove 51 and a snap-fit ​​block 52. In this embodiment, the snap-fit ​​block 52 is disposed on the assembly ring 39. In this embodiment, the snap-fit ​​block 52 has an "L"-shaped block structure. Specifically, the snap-fit ​​block 52 includes a first block 521 and a second block 522 connected to each other. The first block 521 is disposed on the assembly ring 39 along the axis of the assembly ring 39, and the second block 522 is disposed on the assembly ring 39 along the circumference of the assembly ring 39.

[0049] The snap-fit ​​groove 51 is located on the outer wall of the open end of the air inlet housing 33, and the shape of the snap-fit ​​groove 51 matches the shape of the snap-fit ​​block 52. When the air inlet housing 33 is inserted into the mounting recess 392 on the mounting ring 39, rotating the air inlet housing 33 will cause the snap-fit ​​block 52 on the mounting ring 39 to snap into the snap-fit ​​groove 51 of the air inlet housing 33. At this time, the air inlet housing 33 is axially limited on the mounting ring 39, and the air inlet housing 33 can be installed on the mounting ring 39. When it is necessary to remove the air inlet housing 33 from the mounting ring 39, simply rotate the air inlet housing 33 in the opposite direction to disengage the snap-fit ​​block 52 from the snap-fit ​​groove 51, and the air inlet housing 33 can be removed from the mounting ring 39.

[0050] As a preferred technical solution, in this embodiment, the second block 522 of the snap-fit ​​block 52 is provided with a positioning recess 523, and the snap-fit ​​groove 51 is provided with a positioning protrusion 511. When the snap-fit ​​block 52 is snapped into the snap-fit ​​groove 51, the positioning protrusion 511 on the snap-fit ​​groove 51 is limited to the positioning recess 523 on the second block 522. The positioning protrusion 511 and the positioning recess 523 can achieve a self-locking position of the snap-fit ​​block 52, thereby allowing the air inlet housing 33 to be more securely assembled onto the assembly ring 39. In addition, the positioning protrusion 511 and the positioning recess 523 can also serve as a prompt, that is, when the positioning protrusion 511 is snapped into the positioning recess 523, there will be a certain sense of locking, which can prompt the user that the air inlet housing 33 has been installed. In this embodiment, the air inlet housing 33 can be detachably connected to the air inlet end of the outer shell 31 by the assembly ring 39 and the snap-fit ​​structure 5, which makes the air inlet housing 33 easy to disassemble and assemble, and facilitates the cleaning of the air inlet housing 33 and the maintenance and replacement of internal parts.

[0051] like Figure 2 and Figure 6 As shown. To improve the cleanliness of the exhaust air, a filter element 4 is also provided inside the air inlet housing 33 in this embodiment. In this embodiment, the filter element 4 is configured as a cylindrical structure. Specifically, in this embodiment, the filter element 4 can be a HEPA filter cartridge. The filter element 4 can filter and clean the air entering the housing 31, effectively preventing dust or particulate matter from harming the user. As a preferred technical solution, in this embodiment, the filter element 4 is coaxially arranged inside the air inlet housing 33. Figure 2 and Figure 6 As shown, in this embodiment, a plurality of air inlet holes 331 are arranged on the side wall of the air inlet housing 33, which serve as air inlet channels for the air inlet housing 33. The air inlet holes 331 are oriented towards the filter element 4, ensuring that the air entering the air inlet housing 33 first contacts and is filtered by the filter element 4 before entering the housing 31. As a preferred embodiment, the side wall of the air inlet housing 33 is circular and bulges outwards, which increases the air inlet area.

[0052] As a preferred technical solution, such as Figure 6 As shown, in this embodiment, a plurality of protruding ridges 332 are evenly spaced along the circumference of the inner sidewall of the air inlet housing 33. The protruding ridges 332 can support the filter element 4, so that the filter element 4 can be stably located inside the air inlet housing 33. At the same time, the protruding ridges 332 make a certain gap between the sidewall of the air inlet housing 33 and the filter element 4. This arrangement can effectively prevent the filter element 4 from being tightly fitted to the air inlet hole 331. On the one hand, it can reduce wind resistance and ensure air intake. On the other hand, it can make the air enter the air inlet housing 33 first and then come into contact with the filter element 4 for filtration, ensuring the effective contact area between the air and the filter element 4, which is beneficial to improving filtration efficiency.

[0053] When the air inlet housing 33 is installed on the assembly ring 39, the filter element 4 is axially confined between the assembly ring 39 and the air inlet housing 33, that is, one end of the filter element 4 abuts against the assembly ring 39, and the other end abuts against the inner bottom of the air inlet housing 33. After the air inlet housing 33 is removed from the assembly ring 39, the filter element 4 can be directly removed from the air inlet housing 33, which facilitates the replacement or cleaning of the filter element 4. In this embodiment, the filter element 4 can filter the air entering the air inlet housing 33, which helps to improve the cleanliness of the exhaust air and can effectively reduce the harm of dust or particulate matter to the user.

[0054] In this embodiment, a filter element 4 is provided inside the air inlet housing 33. At the same time, in this embodiment, the air outlet housing 34, the connecting housing 37 and the fan assembly 32 cooperate to form a pressurization channel with a radial cross-sectional area that gradually decreases from the air inlet end to the air outlet end of the outer shell 31. The pressurization channel can effectively increase the air delivery distance and air volume, and can also improve the air intake suction of the fan head 3. Thus, even with the filter element 4 installed, the fan head 3 can still ensure sufficient air intake without affecting the user's experience.

[0055] like Figure 2 As shown, in this embodiment, the fan assembly 32 is disposed within the connecting housing 37 and mounted on the air outlet housing 34. Specifically, the fan assembly 32 includes a motor assembly 321 and fan blades 36. The motor assembly 321 is mounted on the side of the air outlet housing 34 facing the air inlet end of the outer housing 31. The motor assembly 321 drives the fan blades 36 to rotate, and the fan blades 36 are connected to the output shaft of the motor assembly 321. Specifically, as... Figure 2 and Figure 3As shown, in this embodiment, the fan blade 36 includes an assembly cylinder 361, a hub 362, and several blades 363. The hub 362 has a conical cover structure; specifically, in this embodiment, the hub 362 is a truncated cone shape, with one end open and the other sealed. The sealed end of the hub 362 is the cone tip 3621, which faces the air inlet end of the outer casing 31. The open end of the hub 362 is a flared end 3622, which faces the air outlet end of the outer casing 31. The radial cross-sectional area of ​​the hub 362 gradually increases from the air inlet end of the outer casing 31 towards the air outlet end. Specifically, in this embodiment, the hub 362 includes a guide surface 3623 that radially increases from the air inlet end of the outer casing 31 towards the air outlet end. As a preferred technical solution, in this embodiment, at least a portion of the guide surface 3623 is radially concave inward to form a concave surface.

[0056] The assembly cylinder 361 is located at the flared end 3622 of the hub 362, and at least partially inside the hub 362. Specifically, one end of the assembly cylinder 361 is fixedly connected to the inner wall of the hub 362, and the other end of the assembly cylinder 361 extends forward beyond the flared end 3622 of the hub 362. A portion of the motor assembly 321 is located inside the assembly cylinder 361. As a preferred technical solution, in this embodiment, the motor assembly 321 adopts an external rotor brushless motor, a three-phase high-speed micro motor, or other suitable motors, which are selected and adapted according to the specific requirements.

[0057] like Figure 3 As shown, in this embodiment, a first mounting sleeve 364 is provided inside the hub 362. Specifically, one end of the first mounting sleeve 364 is fixedly connected to the interior of the conical top end 3621 of the hub 362, and the other end of the first mounting sleeve 364 is connected to the output shaft of the motor assembly 321. The motor assembly 321 can drive the entire fan blade 36 to rotate through the first mounting sleeve 364. As a preferred technical solution, in this embodiment, a plurality of reinforcing plates 365 are provided between the outer wall of the first mounting sleeve 364 and the inner wall of the hub 362. The plurality of reinforcing plates 365 are arranged at intervals along the circumference of the first mounting sleeve 364 between the hub 362 and the first mounting sleeve 364. In this embodiment, the setting of the reinforcing plates 365 can improve the stability of the first mounting sleeve 364 inside the hub 362, thereby improving the stability of the rotation of the entire fan blade 36.

[0058] like Figure 2 and Figure 3As shown, in this embodiment, several blades 363 are evenly spaced and fixed on the outer wall of the hub 362 along the circumference of the hub 362. As a preferred technical solution, in this embodiment, several blades 363 extend from the air inlet end of the outer casing 31 to the air outlet end and bend at a preset angle along the circumference of the hub 362. The distance between the ends of two adjacent blades 363 near the air inlet end of the outer casing 31 is smaller than the distance between the ends of two adjacent blades 363 near the air outlet end of the outer casing 31, which is beneficial to improve the smoothness of gas flow, increase the air intake volume, and reduce noise.

[0059] like Figure 3 As shown, in this embodiment, the hub 362 includes an air guide portion 3624 and a blade connecting portion 3625 along the axial direction of the hub 362. In this embodiment, the air guide portion 3624 and the blade connecting portion 3625 are integrally formed. The air guide portion 3624 is arranged facing the air inlet end of the outer casing 31. A plurality of blades 363 are evenly fixedly arranged on the outer side wall of the blade connecting portion 3625 along the circumference of the hub 362. The arrangement of the air guide portion 3624 can play a good air guiding role, which can make the air smoothly transition to the blades, which is conducive to increasing the air intake volume. At the same time, it ensures that the blades have sufficient length on the hub, so that the blades can fully comb the airflow and ensure the air delivery performance of the fan blades.

[0060] like Figure 2 As shown, in this embodiment, the connecting housing 37 includes a second outer cylinder portion 371 and a second inner cylinder portion 372. In this embodiment, the second outer cylinder portion 371 is a cylindrical structure, that is, the second outer cylinder portion 371 is a cylindrical structure with a uniform diameter. The second inner cylinder portion 372 is located inside the second outer cylinder portion 371 and is disposed towards the hub 362. In this embodiment, a plurality of second connecting plates 373 are provided between the second outer cylinder portion 371 and the second inner cylinder portion 372. The plurality of second connecting plates 373 are arranged at intervals along the circumference of the second outer cylinder portion 371 between the second inner cylinder portion 372 and the second outer cylinder portion 371.

[0061] As a preferred technical solution, in this embodiment, the assembly ring 39 is detachably connected to the second connecting plate 373. Specifically, in this embodiment, the assembly ring 39 is connected to the second connecting plate 373 by screws or rivets, such as... Figure 4 As shown, the assembly ring 39 is provided with a plurality of assembly holes 391 for fasteners such as screws or rivets to pass through. It should be noted that the fastening method of the screws or rivets is a preferred method to achieve a detachable connection between the assembly ring 39 and the connecting housing 37, and is not intended to limit the present invention.

[0062] like Figure 2As shown, in this embodiment, the second inner cylinder portion 372 includes a variable diameter section 3721 and a constant diameter section 3722. One end of the variable diameter section 3721 is fixedly connected to the end of the second outer cylinder portion 371 near the air outlet end of the outer casing 31, and the other end of the variable diameter section 3721 is connected to the constant diameter section 3722. The radial cross-sectional area of ​​the variable diameter section 3721 gradually increases from the air inlet end of the outer casing 31 to the air outlet end of the outer casing 31. Specifically, the variable diameter section 3721 includes an inner surface 3724 that radially increases from the air inlet end of the outer casing 31 to the air outlet end of the outer casing 31. As a preferred technical solution, in this embodiment, the second outer cylinder portion 371, the variable diameter section 3721, the constant diameter section 3722, and the second connecting plate 373 are integrally formed. In this embodiment, the end of the second outer cylinder 371 facing the air inlet of the outer casing 31 and the end of the equal diameter section 3722 facing the air inlet of the outer casing 31 are in close contact with the assembly ring 39, and the inner sidewall of the assembly ring 39 smoothly transitions to the inner sidewall of the equal diameter section 3722.

[0063] like Figure 2 As shown, the fan blade 36 and the variable diameter section 3721 form a flow guiding channel. The air guiding surface 3621 of the hub 36 and the inner side surface 3724 of the variable diameter section 3721 make the radial cross-sectional area of ​​the flow guiding channel gradually decrease along the direction from the air inlet end of the outer casing 31 to the air outlet end of the outer casing 31. This not only plays a role in obliquely guiding the air, but also has a pressurizing effect on the air, which is conducive to increasing the air delivery distance and enhancing the air intake suction.

[0064] like Figure 2 As shown, in this embodiment, the air outlet housing 34 is disposed on the side of the connecting housing 37 facing the air outlet end of the outer casing 31. Specifically, in this embodiment, the air outlet housing 34 includes a first outer cylinder portion 341 and a first inner cylinder portion 342. In this embodiment, the first outer cylinder portion 341 is a cylindrical tube, and the inner sidewall of the first outer cylinder portion 341 is at least partially of equal diameter. One end of the first outer cylinder portion 341 is fixedly connected to the air outlet end of the outer casing 31. As a preferred technical solution, the connection between the first outer cylinder portion 341 and the air outlet end of the outer casing 31 can be achieved by screw connection, snap-fit, or plug-in connection. The other end of the first outer cylinder portion 341 is tightly abutted or snapped against the ends of the second outer cylinder portion 371 and the second inner cylinder portion 372 facing the air outlet end of the outer casing 31, and the inner sidewall of the second inner cylinder portion 372 smoothly transitions to the inner sidewall of the first outer cylinder portion 341.

[0065] like Figure 2 and Figure 3As shown, a plurality of first connecting plates 343 are fixedly provided between the first outer cylinder portion 341 and the first inner cylinder portion 342. The plurality of first connecting plates 343 are evenly arranged at intervals along the circumference of the first outer cylinder portion 341 and the first inner cylinder portion 342, and an air outlet channel 344 of the air outlet housing 34 is formed between two adjacent first connecting plates 343. In this embodiment, the first connecting plate 343 is configured as a flat plate structure, and the first connecting plate 343 is arranged along the axial direction of the first inner cylinder portion on the outer side wall of the first inner cylinder portion.

[0066] like Figure 2 and Figure 3 As shown, the first inner cylinder 342 is a frustum-shaped cylinder with openings at both ends. Specifically, in this embodiment, the radial cross-sectional area of ​​the first inner cylinder 342 gradually increases from the air inlet end of the outer shell 31 to the air outlet end of the outer shell 31. The first inner cylinder 342 includes a pressure surface 3421 that increases radially from the air inlet end of the outer shell 31 to the air outlet end of the outer shell 31. As a preferred technical solution, at least a portion of the pressure surface 3421 in this embodiment protrudes radially outward to form a convex surface. In this embodiment, the inner wall surface of the first outer cylinder 341 and the pressure surface 3421 of the first inner cylinder 342 cause the cross-sectional area of ​​the air outlet channel 344 to gradually decrease from the air inlet end of the outer shell 31 to the air outlet end of the outer shell 31, which can play a secondary pressurization role on the air, further increasing the airflow velocity and air delivery distance, and enhancing the air intake suction. In addition, the first connecting plate 343 can further sort and transform the airflow flowing through the air outlet shell 33, adjust the airflow direction, and further increase the air delivery distance.

[0067] In this embodiment, the guide channel formed by the fan blade 36 and the second inner cylinder 372, together with the air outlet channel 344 formed by the first outer cylinder 341, the first inner cylinder 342, and the first connecting plate 343, together form the pressurization channel within the fan head 3. In this embodiment, the guide channel smoothly transitions to the air outlet channel. The pressurization channel in this embodiment allows the fluid to flow obliquely outwards and can pressurize the fluid step by step, which is beneficial to increasing the air volume, air delivery distance, and air intake suction. This allows the fan head 3 in this embodiment to still have a large air intake even with the filter element 4 installed, which can meet the user's usage experience.

[0068] Figure 2 and Figure 3 As shown, in this embodiment, a mounting partition 345 is provided inside the first inner cylinder 342, and the mounting partition 345 is arranged radially inside the first inner cylinder 342. In this embodiment, a second mounting sleeve 346 is provided at the center position of the side of the mounting partition 345 facing the air inlet end of the outer casing 31, and the motor assembly 321 is fixedly assembled on the second mounting sleeve 346.

[0069] like Figure 3As shown, in this embodiment, the axial distance D5 between the flared end 3622 of the hub 362 and the end of the first inner cylinder 342 facing the air inlet end of the outer casing 31 is between 0.5mm and 3mm. This axial distance D5 not only ensures that the fan blade 36 has room to rotate, i.e., it does not restrict or hinder the normal rotation of the fan blade 36, but also allows the airflow generated by the fan blade 36 to flow smoothly to the air outlet casing 34, which helps reduce noise generated by turbulence.

[0070] As a preferred technical solution, in this embodiment, a shock-absorbing component can also be provided between the assembly cylinder 361 and the motor assembly 321. The shock-absorbing component is a rubber washer. By setting the shock-absorbing component, the stability of the fit between the structures can be improved, and noise can also be reduced, thereby improving the user experience.

[0071] In this embodiment, a first cover 348 is provided at the end of the first inner cylinder 342 near the air outlet end of the outer casing 31. Alternatively, the first cover 348 can be replaced with a display screen to show information such as fan power or wind speed, further improving the user experience. As a preferred embodiment, the first cover 348 is a cover structure, fixedly or detachably mounted on the end of the first inner cylinder 342 facing the air outlet end of the outer casing 31. In this embodiment, the front surface 3481 of the first cover 348 is set as a plane.

[0072] like Figure 1 As shown, in this embodiment, the fan body also includes a base 2 and an electronic control component. The fan head 3 is mounted on the base 2. In this embodiment, the base 2 has a hollow structure, and the electronic control component is located inside the base 2. The electronic control component includes components such as a rechargeable battery pack, a charging board, and a control circuit board. The electronic control component is electrically connected to the fan assembly and is used to drive and control the operation of the fan assembly. A charging interface 71 and a control button 72 are also provided on the side wall of the base 2 near the air outlet end of the outer shell 31. The control button 72 is electrically connected to the electronic control component and is used to control the start / stop and wind speed adjustment functions of the fan assembly. The charging interface 71 is electrically connected to the electronic control component and is used to charge the rechargeable battery pack. With the rechargeable battery pack and charging board, the portable fan can store electricity. After charging, no external power supply is required, making it convenient for users to use in different temporary locations and improving the user experience.

[0073] As a preferred technical solution, such as Figure 2As shown, in this embodiment, the mounting partition 345 is also provided with an electrical wire hole 347. The first connecting plate 343 near the electrical wire hole 347 is set as a hollow structure. The electrical wire hole 347 and the hollow first connecting plate 343 allow the wires that are electrically connected to the motor assembly 321 and the electronic control assembly to pass through. One end of the wire is electrically connected to the motor assembly 321, and the other end can pass through the electrical wire hole 347 and the hollow first connecting plate 343 on the mounting partition 345, enter the air outlet housing 34 and the gap between the connecting housing 37 and the outer shell 31, and after being designed to run in the gap, enter the interior of the base 2 and be electrically connected to the electronic control assembly.

[0074] In this embodiment, the fan head 3 is fixedly installed on the top of the base 2. As a preferred technical solution, the top of the base 2 in this embodiment is provided with a first arc-shaped recess 211. The first arc-shaped recess 211 is designed to match the shape of the outer shell 31 of the fan head 3, so that the outer shell 31 can fit into the first arc-shaped recess 211 on the base 2, making the overall structure of the fan more compact.

[0075] Example 2

[0076] This embodiment is a second embodiment of a fan body, including a fan head 3, as shown below. Figures 8-15 As shown, in this embodiment, the fan head 3 includes a housing 31, a fan assembly 32, an air inlet housing 33, and an air outlet housing 34. The housing 31 is a cylindrical housing open at both ends, with an air inlet A and an air outlet B at the two ends. External air enters the housing 31 from the air inlet A and exits from the air outlet B. The fan assembly 32 is located inside the housing 31. The air inlet housing 33 is located at the air inlet end of the housing 31 and has an air inlet channel. The air outlet housing 34 is located at the air outlet end of the housing 31 and has an air outlet channel.

[0077] like Figure 9 and Figure 11 As shown, in this embodiment, the fan head 3 also includes a connecting housing 37, which is fixedly disposed inside the outer casing 31. In this embodiment, the air inlet housing 33 is detachably connected to the end of the connecting housing 37 facing the air inlet end of the outer casing 31. Specifically, as shown... Figure 9 and Figure 11As shown, in this embodiment, an assembly ring 39 is connected to the side of the connecting housing 37 facing the air inlet end of the outer shell 31, and the assembly ring 39 is fixedly connected to the air inlet end of the outer shell 31. As a preferred technical solution, in this embodiment, the outer peripheral wall of the assembly ring 39 is provided with a connecting ring 393, and the connecting ring 393 and the air inlet end of the outer shell 31 are engaged by a retaining ring and a buckle. In this embodiment, the engagement of the connecting ring 393 and the outer shell 31 is not a limiting provision, and other methods that can achieve a detachable connection between the assembly ring 39 and the outer shell 31 are also acceptable. As a preferred technical solution, in this embodiment, the inner side wall of the outer shell 31 near the air inlet end is provided with a first limiting groove 317, and the top of the connecting ring 393 can be inserted into the first limiting groove 317. The first limiting groove 317 can axially limit the assembly ring 39 to the outer shell 31.

[0078] In this embodiment, the air inlet housing 33 is detachably connected to the assembly ring 39. For example... Figures 11-13 As shown, in this embodiment, the air inlet housing 33 and the assembly ring 39 are detachably connected by a snap-fit ​​structure 5. The specific configuration of the snap-fit ​​structure 5 in this embodiment is the same as that in Embodiment 1. Specifically, as... Figure 12 and Figure 13 As shown, in this embodiment, the snap-fit ​​structure 5 includes a snap-fit ​​groove 51 and a snap-fit ​​block 52. In this embodiment, the snap-fit ​​block 52 is disposed on the assembly ring 39. In this embodiment, the snap-fit ​​block 52 has an "L"-shaped block structure. Specifically, the snap-fit ​​block 52 includes a first block 521 and a second block 522 connected to each other. The first block 521 is disposed on the assembly ring 39 along the axis of the assembly ring 39, and the second block 522 is disposed on the assembly ring 39 along the circumference of the assembly ring 39.

[0079] The snap-fit ​​groove 51 is located on the inner side wall of the open end of the air inlet housing 33, and the shape of the snap-fit ​​groove 51 matches the shape of the snap-fit ​​block 52. When the open end of the air inlet housing 33 is aligned with the assembly ring 39, rotating the air inlet housing 33 will cause the snap-fit ​​block 52 on the assembly ring 39 to snap into the snap-fit ​​groove 51 of the air inlet housing 33. At this time, the air inlet housing 33 is axially limited on the assembly ring 39, and the air inlet housing 33 can be installed on the assembly ring 39. When it is necessary to remove the air inlet housing 33 from the assembly ring 39, simply rotate the air inlet housing 33 in the opposite direction to disengage the snap-fit ​​block 52 from the snap-fit ​​groove 51, and the air inlet housing 33 can be removed from the assembly ring 39.

[0080] As a preferred technical solution, in this embodiment, the second block 522 of the snap-fit ​​block 52 is provided with a positioning recess 523, and the snap-fit ​​groove 51 is provided with a positioning protrusion 511. When the snap-fit ​​block 52 is snapped into the snap-fit ​​groove 51, the positioning protrusion 511 on the snap-fit ​​groove 51 is limited to the positioning recess 523 on the second block 522. The positioning protrusion 511 and the positioning recess 523 can achieve a self-locking position of the snap-fit ​​block 52, thereby enabling the air inlet housing 33 to be stably assembled onto the assembly ring 39. In addition, the positioning protrusion 511 and the positioning recess 523 can also serve as a prompt, that is, when the positioning protrusion 511 is snapped into the positioning recess 523, there will be a certain sense of locking, which can prompt the user that the air inlet housing 33 has been installed. In this embodiment, the air inlet housing 33 can be detachably connected to the air inlet end of the outer shell 31 by the assembly ring 39 and the snap-fit ​​structure 5, which makes the air inlet housing 33 easy to disassemble and assemble, and facilitates the cleaning of the air inlet housing 33 and the maintenance and replacement of internal parts.

[0081] like Figure 8 , Figure 9 , Figure 11 and Figures 13-14 As shown, in this embodiment, the air inlet housing 33 is a cylindrical structure with openings at both ends. The side of the air inlet housing 33 facing the air outlet end of the outer shell 31 is connected to the assembly ring 39. An air inlet baffle 334 is provided on the side of the air inlet housing 33 facing the air inlet end of the outer shell 31. In this embodiment, the air inlet baffle 334 is coaxially arranged with the air inlet housing 33. A plurality of grilles 335 are provided between the air inlet baffle 334 and the air inlet housing 33. The plurality of grilles 335 are evenly spaced along the circumference of the air inlet baffle 334 and the air inlet housing 33. Specifically, in this embodiment, one end of the grille 335 is connected to the inner side wall of the air inlet housing 33, and the other end is connected to the outer side wall of the air inlet baffle 334.

[0082] like Figure 8 , Figure 9 , Figure 11 and Figures 13-14 As shown, in this embodiment, air inlet baffle 334 has air inlet openings 3341 evenly distributed on it. As a preferred technical solution, in this embodiment, the air inlet baffle 334 is configured as a concave structure recessed into the air inlet housing 33, and in this embodiment, the concave structure is arc-shaped. This configuration can expand the air inlet area, increase the air intake volume, and also achieve the effect of concentrating and guiding airflow. Of course, in other embodiments, the air inlet baffle 334 can also be a flat plate structure arranged radially along the air inlet housing 33 or a convex structure protruding outward from the air inlet housing 33.

[0083] In this embodiment, the air inlet opening 3341 of the air inlet baffle 334 and the interval between two adjacent grilles 335 together form the air inlet channel of the air inlet housing 33. In this embodiment, the port diameter D2 of the air inlet housing 33 facing the air inlet end of the outer shell 31 is 1.15-1.55 times the maximum radial length D3 of the outer periphery of the air inlet baffle 334.

[0084] like Figure 11 and Figure 14 As shown, in this embodiment, an air guide ring 336 is provided on the inner side of the port of the air inlet housing 33 facing the air inlet end of the outer shell 31. The air guide ring 336 includes a guide surface 3361 that gradually decreases radially from the air inlet end of the outer shell 31 to the air outlet end of the outer shell 31. In this embodiment, the guide surface 3361 of the air guide ring and the outer peripheral wall of the air inlet baffle 334 can play a good guiding role for the airflow, allowing the airflow to enter along the wall, making the airflow smoother and helping to increase the air intake volume.

[0085] As a preferred technical solution, such as Figure 15 As shown, in this embodiment, the bottom of the outer casing 31 is provided with a connecting hole, and the outer side wall of the air inlet casing 33 is provided with a fixing protrusion 333. The fixing protrusion 333 has a through hole, through which the first fastener 3331 passes and connects with the connecting hole at the bottom of the outer casing 31. In this embodiment, the connecting hole at the bottom of the outer casing 31 is a threaded hole, and the first fastener 3331 is a screw, which can be threaded into the threaded hole. This arrangement can further increase the stability of the air inlet casing 33 at the air inlet end of the outer casing 31, ensuring that the air inlet casing 33 can be firmly installed on the outer casing 31 when the fan body is working, thus improving the safety of the fan body.

[0086] like Figure 9 and Figure 11 As shown, in this embodiment, the connecting shell 37 includes a second outer cylinder portion 371. In this embodiment, the second outer cylinder portion 371 is a cylindrical structure, that is, the second outer cylinder portion 371 is a cylindrical structure with an equal diameter. In this embodiment, the assembly ring 39 is connected to the second outer cylinder portion 371. As a preferred technical solution, in this embodiment, the second outer cylinder portion 371 and the assembly ring 39 are integrally formed structures.

[0087] like Figure 9 As shown, in this embodiment, one end of the assembly ring 39 is connected to the second outer cylinder 371, and the other end of the assembly ring 39 abuts against the end of the air guide ring 336 facing the air outlet end of the outer casing 31. The guide surface 3361 smoothly transitions to the inner wall of the assembly ring 39.

[0088] like Figure 9As shown, in this embodiment, the fan assembly 32 is disposed within the connecting housing 37 and mounted on the air outlet housing 34. Specifically, the fan assembly 32 includes a motor assembly 321 and fan blades 36. The motor assembly 321 is mounted on the side of the air outlet housing 34 facing the air inlet end of the outer casing 31. The motor assembly 321 drives the fan blades 36 to rotate, and the fan blades 36 are connected to the output shaft of the motor assembly 321. Specifically, in this embodiment, the fan blades 36 include an assembly cylinder 361, a hub 362, and several blades 363. The hub 362 has a conical cover structure. Specifically, in this embodiment, the hub 362 is a truncated cone shape and is a cover structure with one end open and the other end sealed. The sealed end of the hub 362 is the cone tip 3621, which faces the air inlet end of the outer casing 31. The open end of the hub 362 is a flared end 3622, which faces the air outlet end of the outer casing 31.

[0089] In this embodiment, the radial cross-sectional area of ​​the hub 362 gradually increases from the air inlet end of the outer shell 31 to the air outlet end of the outer shell 31. Specifically, the hub 362 includes an air guide surface 3621 that increases radially from the air inlet end of the outer shell 31 to the air outlet end of the outer shell 31. As a preferred technical solution, at least a portion of the air guide surface 3621 protrudes outward to form a convex surface.

[0090] The assembly cylinder 361 is located at the flared end 3622 of the hub 362, and at least partially inside the hub 362. In this embodiment, the assembly cylinder 361 is entirely located inside the hub 362. Specifically, one end of the assembly cylinder 361 is fixedly connected to the inner wall of the hub 362, and the other end of the assembly cylinder 361 does not extend forward beyond the flared end 3622 of the hub 362. A portion of the motor assembly 321 is located inside the assembly cylinder 361. As a preferred technical solution, in this embodiment, the motor assembly 321 adopts an external rotor brushless motor, a three-phase high-speed micro motor, or other suitable motors, selected and adapted according to the specific requirements.

[0091] like Figure 9 As shown, in this embodiment, a first mounting sleeve 364 is provided inside the hub 362. Specifically, one end of the first mounting sleeve 364 is fixedly connected to the inside of the conical top 3621 of the hub 362, and the other end of the first mounting sleeve 364 is connected to the output shaft of the motor assembly 321. The motor assembly 321 can drive the entire fan blade 36 to rotate through the first mounting sleeve 364. As a preferred technical solution, in this embodiment, a plurality of reinforcing plates 365 are provided between the outer wall of the first mounting sleeve 364 and the inner wall of the hub 362. The plurality of reinforcing plates 365 are arranged at intervals along the circumference of the first mounting sleeve 364 between the hub 362 and the first mounting sleeve 364. In this embodiment, the setting of reinforcing plates 365 can improve the stability of the first mounting sleeve 364 inside the hub 362, thereby improving the stability of the rotation of the entire fan blade 36.

[0092] like Figure 10 As shown, in this embodiment, the hub 362 includes an air guide portion 3624 and a blade connecting portion 3625 along the axial direction of the hub 362. In this embodiment, the air guide portion 3624 and the blade connecting portion 3625 are integrally formed. A plurality of blades 363 are evenly fixedly disposed on the outer side wall of the blade connecting portion 3625 along the circumference of the hub 362. As a preferred technical solution, in this embodiment, the axial length L1 of the air guide portion 3624 is 1 / 10 to 3 / 10 of the axial length L0 of the entire hub 362. This arrangement allows the air guide portion to play a good air guiding role, enabling the airflow to smoothly transition to the blades, which is beneficial to increasing the air intake volume. At the same time, it ensures that the blades have sufficient extension length on the hub, which helps the blades to fully comb the airflow, thereby ensuring the air delivery performance of the fan blades.

[0093] like Figure 10 As shown, in this preferred embodiment, several blades 363 extend from the air inlet end of the housing 31 to the air outlet end of the housing 31 and bend at a preset angle along the circumference of the hub 362. The distance between the ends of two adjacent blades 363 near the air inlet end of the housing 31 is smaller than the distance between the ends of two adjacent blades 363 near the air outlet end of the housing 31. As a preferred embodiment, such as... Figure 13 and Figure 14 As shown, in this embodiment, the side 3631 of the blade 363 facing the air inlet end of the outer casing 31 is folded outward in the opposite direction to the circumferential extension of the blade 363 along the hub 362. This is beneficial to improve the air guiding effect of the blade and enhance the air intake of the fan blade.

[0094] efficiency.

[0095] like Figure 9 and Figure 10 As shown, in this embodiment, the air outlet housing 34 is disposed on the side of the connecting housing 37 facing the air outlet end of the outer casing 31. Specifically, in this embodiment, the air outlet housing 34 includes a first outer cylinder portion 341 and a first inner cylinder portion 342. A plurality of first connecting plates 343 are fixedly disposed between the first outer cylinder portion 341 and the first inner cylinder portion 342. The plurality of first connecting plates 343 are evenly disposed at intervals along the circumference of the first outer cylinder portion 341 and the first inner cylinder portion 342, and an air outlet channel of the air outlet housing 34 is formed between two adjacent first connecting plates 343.

[0096] like Figure 9 and Figure 10As shown, in this embodiment, the first inner cylinder portion 342 is configured as a cylindrical structure in the shape of a frustum or a truncated cone with openings at both ends. Specifically, in this embodiment, the radial cross-sectional area of ​​the first inner cylinder portion 342 gradually increases along the direction from the air inlet end of the outer casing 31 to the air outlet end of the outer casing 31. Specifically, the first inner cylinder portion 342 includes a pressure surface 3421 that increases radially from the air inlet end to the air outlet end. As a preferred technical solution, the pressure surface 3421 is at least partially radially convex, forming a convex surface.

[0097] like Figure 9 and Figure 10 As shown, in this embodiment, the first outer cylinder portion 341 extends forward beyond the first inner cylinder portion 342. The first outer cylinder portion 341 is connected to a portion of the top side of the second connecting plate 343. In this embodiment, the second outer cylinder portion 371 extends forward toward the air outlet end of the outer casing 31 to form a second outer cylinder extension portion 3711. The second outer cylinder extension portion 3711 abuts against the end edge of the first outer cylinder portion 341 toward the air inlet end of the outer casing 31, and the inner sidewall of the second outer cylinder extension portion 3711 is in close contact with the top side of the first connecting plate 342. The inner sidewall of the second outer cylinder extension portion 3711 smoothly transitions to the inner sidewall of the first outer cylinder portion 341.

[0098] In this embodiment, the edge of the second outer cylinder extension 3711 is tightly abutted against the edge of the first outer cylinder portion 341 facing the air inlet end of the outer casing 31, and the two are engaged by a retaining ring and a snap fastener. The snap-fit ​​connection between the second outer cylinder extension 3711 and the first outer cylinder portion 341 in this embodiment is not a limiting provision; other methods of connection are also acceptable. The outer top of the first outer cylinder portion 341 facing the air outlet end of the outer casing 31 is fixedly connected to the air outlet end of the outer casing 31. In this embodiment, the first outer cylinder portion 341 and the outer casing 31 are engaged in a limiting insertion. Specifically, the outer side wall of the first outer cylinder portion 341 is provided with a second limiting insertion block 3413, and the inner side wall of the outer casing 31 near the air outlet end is provided with a second limiting groove 318. When the air outlet casing 341 is installed inside the outer casing 31, the second limiting insertion block 3413 can be inserted into the second limiting groove 318. The second limiting insert 3413 and the second limiting groove 318 can axially limit the air outlet housing 341 within the outer shell 31, thereby improving the stability of the air outlet housing 341 within the outer shell 31. In this embodiment, the connection method between the first outer cylinder 341 and the outer shell 31 is not a limiting provision; other methods that can achieve the connection between the two are also acceptable.

[0099] In this embodiment, a transition channel is formed between the second outer cylinder extension 3711 and the first inner cylinder 342 facing the second outer cylinder extension 3711. The transition channel is located between the air outlet channel and the guide channel, and in this embodiment, the two ends of the transition channel smoothly transition to the guide channel and the air outlet channel, respectively.

[0100] like Figure 9As shown, in this embodiment, the part connecting the first outer cylinder portion 341 and the first connecting plate 343 is the first outer cylinder connecting portion 3411. In this embodiment, the first outer cylinder connecting portion 3411 is cylindrical, and the inner sidewall of the first outer cylinder connecting portion 3411 is set with a constant diameter. In this embodiment, the inner sidewall of the first outer cylinder connecting portion 3411 and the pressurizing surface 3421 of the first inner cylinder portion 342 make the radial cross-sectional area of ​​the air outlet channel gradually decrease along the direction from the air inlet end of the outer casing 31 to the air outlet end of the outer casing 31, which can pressurize the air, further increase the air delivery distance and enhance the air intake suction.

[0101] In this embodiment, the airflow channel formed by the fan blade 36 and the second outer cylinder 371, the air outlet channel formed by the first outer cylinder connecting part 3411, the first inner cylinder part 342 and the first connecting plate 343, and the transition channel formed between the second outer cylinder extension part 3711 and the first inner cylinder part 342 together form the pressurization channel in the fan head 3 of this embodiment. The pressurization channel causes the airflow to be obliquely guided out, and after being pressurized step by step, the air volume, air delivery distance and air intake suction are greatly increased.

[0102] As a preferred technical solution, such as Figure 10 As shown, in this embodiment, the first connecting plate 343 is gradually bent and inclined from the air outlet end of the outer shell 31 towards the air inlet end of the outer shell 31 and along the circumference of the first inner cylinder portion 342, so that the two sides of the first connecting plate 343 respectively form an outward convex surface 3431 and an inward concave surface 3432. In this embodiment, the outward convex surface 3431 faces the air inlet end of the outer shell 31, and the inward concave surface 3432 faces the air outlet end of the outer shell 31. This arrangement allows the first connecting plate 343 to better organize and transform the airflow flowing through the air outlet housing 33, which can guide the airflow, making the airflow smoother. This not only helps to increase the air outlet distance but also reduces noise.

[0103] As a preferred technical solution, such as Figure 9 As shown, in this embodiment, the first outer cylinder portion 341 also includes a first outer cylinder extension portion 3412. The first outer cylinder extension portion 3412 and the first outer cylinder connecting portion 3411 are integrally formed. The inner sidewall of the first outer cylinder extension portion 3412 extends axially and bends outward, so that the entire first outer cylinder extension portion 3412 is flared. In this embodiment, the flared shape of the first outer cylinder extension portion 3412 can guide the airflow and increase the airflow range, thereby improving the user's comfort.

[0104] like Figure 9As shown, in this embodiment, a mounting partition 345 is provided inside the first inner cylinder 342, and the mounting partition 345 is arranged radially inside the first inner cylinder 342. In this embodiment, a second mounting sleeve 346 is installed on the side of the mounting partition 345 facing the air inlet end of the outer casing 31, and the motor assembly 321 is fixedly assembled on the second mounting sleeve 346.

[0105] like Figure 10 As shown, in this embodiment, the axial distance D5 between the flared end 3622 of the hub 362 and the end of the first inner cylinder 342 facing the air inlet end of the outer casing 31 is between 0.5mm and 3mm. This axial distance D5 not only ensures that the fan blade 36 has room to rotate, i.e., it does not restrict or hinder the normal rotation of the fan blade 36, but also allows the airflow generated by the fan blade 36 to flow smoothly to the air outlet casing 34, which helps reduce noise generated by turbulence.

[0106] like Figure 9 As shown, in this embodiment, a first cover 348 is installed on the end of the first inner cylinder 342 near the air outlet end of the outer shell 31. In this embodiment, the front surface 3481 of the first cover 348 is set as a concave surface formed by a rearward indentation. In this embodiment, the first cover 348 is set as a concave structure, and a negative pressure zone is formed in the area of ​​the first cover 348. A part of the airflow flowing out through the air outlet channel 344 will flow towards the negative pressure zone, but will be drawn back by most of the airflow flowing out of the air outlet channel 344 to form a vortex, so that this part of the airflow flows forward again, which can reduce the loss of air volume and wind energy, and achieve the effect of converging fluid and making the air outlet more concentrated.

[0107] In other embodiments, the front surface 3481 of the first cover 348 can be configured as a convex surface that protrudes forward and outward. If the first cover 348 is configured as a convex structure, the fluid will flow forward along the convex surface, which can also reduce the loss of air volume and wind energy to a certain extent.

[0108] As a preferred technical solution, such as Figure 9 As shown, in this embodiment, a lighting assembly is provided between the side of the mounting partition 345 facing the air outlet end of the outer casing 31 and the first cover 348. Specifically, the lighting assembly includes a mounting base 351 and an LED bead board 352. In this embodiment, the mounting base 351 is located on the side of the mounting partition 345 facing the air outlet end of the outer casing 31. In this embodiment, the mounting base 531 is fixedly mounted on the side of the mounting partition 345 facing the air outlet end of the outer casing 31 by screws.

[0109] In this embodiment, the mounting base 351 is recessed inward on the side facing the air outlet end of the outer casing 31 to form a receiving cavity 3511. The LED lamp bead board 352 is disposed inside the receiving cavity 3511, and the bottom of the receiving cavity 3511 is provided with a wiring hole through which the power supply wires connecting the LED lamp bead board 352 pass. In this embodiment, the first cover 348 is detachably connected to the cavity opening of the receiving cavity 3511 of the mounting base 351. In this embodiment, the first cover 348 is connected to the cavity opening of the receiving cavity 3511 of the mounting base 351 by a snap-fit ​​connection. In this embodiment, the side wall between the end of the first inner cylinder portion 342 facing the air outlet end of the outer casing 31 and the first cover 348 is made of transparent or semi-transparent material. The light emitted by the LED lamp bead board 352 can pass through this side wall. In this embodiment, the LED lamp bead board is hidden, and the light is reflected from the inner wall of the air outlet casing, which makes the light softer.

[0110] As a preferred technical solution, in this embodiment, the outer shell 31 is configured as a two-part split structure. Specifically, as shown... Figure 11 As shown, the outer shell 31 includes a first half-shell 311 and a second half-shell 312, which are joined together to form a complete outer shell 31. Specifically, in this embodiment, the sides of the first half-shell 311 and the second half-shell 312 that meet are respectively provided with a first mating connector 313 and a second mating connector 314. The first mating connector 313 is provided with a first connecting hole (not shown in the figure), and the second mating connector 314 is provided with a second connecting hole 3141. Specifically, in this embodiment, both the first connecting hole and the second connecting hole 3141 are through holes. The outer side of the second inner cylinder portion 372 is provided with a connecting hole post (not shown in the figure). Specifically, the connecting hole post is a threaded hole post. When the first half-shell 311 and the second half-shell 312 are aligned, the first mating connector 313 can be inserted into one side of the second mating connector 314, and the positions of the first connecting hole, the second connecting hole 3141 and the connecting hole post (not shown in the figure) correspond. By setting screws and other fasteners in the first connecting hole, the second connecting hole 3141 and the connecting hole post, the first half-shell 311 and the second half-shell 312 can be mated and fixed together, so as to achieve a stable connection between the outer shell 31 and the second outer cylinder 371.

[0111] In other embodiments, both the first connecting hole and the second connecting hole 3141 are threaded holes. By fixing the screw into the first connecting hole and the second connecting hole 3141, the first mating connector 313 and the second mating connector 314 can be fixed together, and the first half-shell 311 and the second half-shell 312 can be mated to form a complete shell 31. The first half-shell 311 and the second half-shell 312 can be stably mated and connected without the need for cooperation with the second outer cylinder 371.

[0112] To further improve the stability of the docking between the first half-shell 311 and the second half-shell 312 and to facilitate the installation of fasteners such as the first connecting hole, the second connecting hole 3141 and the screws at the connecting hole post, in this embodiment, the edges of the first half-shell 311 and the second half-shell 312 are respectively provided with buckles and retaining rings, and the positioning and engagement of the first half-shell and the second half-shell are achieved by the snapping of the buckles and retaining rings. Figure 11 Only the structural configuration of the retaining ring 3142 is shown in the image. Figure 11 The structural configuration of the retaining ring 3142 shown is not a limiting provision; other structures that can achieve the positioning and engagement of the first half-shell 311 and the second half-shell 312 are also acceptable.

[0113] As a preferred technical solution, a second cover 315 is provided on the outer shell 31 at the positions of the first docking connector 313 and the second docking connector 314. The second cover 315 can cover the first docking connector 313 and the second docking connector 314, improving the overall aesthetics of the outer shell 31. In this embodiment, the second cover 315 is detachably connected to the first docking connector 313 and / or the second docking connector 314. Specifically, in this embodiment, a docking post (not shown in the figure) is provided on the side of the second cover 315 facing the outer shell 31. The first docking connector 313 and the second docking connection portion 314 are provided with corresponding docking holes 316, the shape of which matches the shape of the docking post. When the second cover 315 is closed to the positions of the first docking connector 313 and the second docking connector 314, the docking post on the second cover 315 can be inserted into the docking hole 316. As a preferred technical solution, in this embodiment, the edge of the second cover 315 is engaged with the edge of the outer shell 31 at the location of the first docking connector 313 and the second docking connector 314.

[0114] like Figure 8 As shown, the fan body in this embodiment also includes a base 2 and an electronic control component. The fan head 3 is located on the base 2. In this embodiment, the base 2 has a hollow structure. The electronic control component includes components such as a rechargeable battery pack, a charging board, and a control circuit board 73. The rechargeable battery pack and the charging board are electrically connected and are both located inside the base 2. A charging interface 71 is also provided on the side wall of the base 2 near the air inlet end of the outer shell 31. The charging interface 71 is electrically connected to the charging board.

[0115] As a preferred technical solution, such as Figure 9 As shown, in this embodiment, the control circuit board 73 is disposed on the top of the fan head 3. Specifically, in this embodiment, the control circuit board 73 is disposed between the outer casing 31 and the second outer cylinder 371, and the control circuit board 73 is fixed to the second outer cylinder 371 by screws. By providing a wire passage between the fan head 3 and the base 2, the control circuit board 73 is electrically connected to the rechargeable battery pack and the charging board.

[0116] In this embodiment, the control circuit board 73 is electrically connected to several buttons. Specifically, the control circuit board 73 has a fan start and fan speed adjustment button 74 and a light button 75. The fan start and fan speed adjustment button 74 is used to control the fan's start and stop and adjust the fan speed level. In this embodiment, the fan speed adjustment level is 1-5. The light button 75 is used to control the light's on and off and adjust the light level. As a preferred technical solution, the control circuit board 73 in this embodiment also has a display screen module 76. By setting the display screen module 76 to display information such as the fan's power level or fan speed level, the user experience is further improved. Correspondingly, the top of the outer casing 31 in this embodiment has an opening for the fan start and fan speed adjustment button 74, the light button 75, and the display screen module 76 to extend out.

[0117] To improve the safety of the fan body of this utility model, such as Figure 9 and Figure 12 As shown, in this embodiment, the control circuit board 73 is also equipped with a sensor 78, and the connecting ring 393 has an opening for the sensor to extend. The sensor 78 is configured to cooperate with the air inlet housing 33 to detect whether the air inlet housing 33 is located at a preset displacement position. The sensor 78 can be triggered when the air inlet housing 33 is located at the preset displacement position or when the air inlet housing 33 is not located at the preset displacement position. In this embodiment, the sensor 78 is a displacement detection switch. Specifically, when the air inlet housing 33 is removed from the air inlet end of the outer shell 31 or when the air inlet housing 33 is not assembled to the preset position of the air inlet end of the outer shell 31, the fan body automatically loses power and cannot start; while when the air inlet housing 33 is assembled to the preset position of the air inlet end of the outer shell 31, the fan body can be powered normally.

[0118] As a preferred technical solution, such as Figure 9 As shown, in this embodiment, the mounting partition 345 is also provided with a wire hole 347. The first connecting plate 343 of the air outlet housing 34 near the control circuit board 73 is set as a hollow structure, and the outside and inside of the air outlet housing 34 are connected. One end of the wire used to electrically connect the motor assembly 321 and the control circuit board 73 is electrically connected to the motor assembly 321, and the other end can pass through the wire hole 347 on the mounting partition 345, and enter the outside of the air outlet housing 34 through the hollow first connecting plate 343 and be electrically connected to the control circuit board 73. The wire used to electrically connect the lighting assembly also enters the outside of the air outlet housing 34 through the hollow first connecting plate 343 and is electrically connected to the control circuit board 73.

[0119] To further improve the safety of the fan body of this utility model, such as Figure 8As shown, in this embodiment, a protection switch 79 is provided on the base 2. The protection switch 79 is located at the charging plate. The protection switch 79 can control whether the circuit for power supply to the fan body is open or closed. In this embodiment, the protection switch 79 is set as a toggle switch. When the protection switch 79 is toggled to one end, the power supply circuit of the fan body is open, and the motor assembly in the fan body can drive the fan blades to rotate. When the protection switch 79 is toggled to the other end, the power supply circuit of the fan body is closed, and all functions are turned off. For example, the motor assembly in the fan body does not work, and the fan blades do not rotate. The protection switch 79 can effectively prevent the operator from accidentally turning on the fan by accidentally touching the switch button.

[0120] Example 3

[0121] This embodiment is an example of a portable fan. This embodiment includes a fixing structure and the fan body of embodiment 1. The fixing structure can fix the fan body to other objects for use. In this embodiment, the fixing structure is a clamping structure. The clamping structure is used to clamp the fan body. That is, the fan body is installed on the clamping structure, so the portable fan can be clamped to a table or rod-shaped object for use. The rod-shaped object is such as the guardrail of a stroller or the guardrail of a bed, which makes the portable fan suitable for more application scenarios.

[0122] In other embodiments, the fixing structure can also be a traditional torsion spring pressing and clamping structure, an octopus-wrap fixing structure, or a belt buckle fixing structure.

[0123] like Figures 16-20 As shown, in this embodiment, the gripper structure 1 includes a fixed gripper 11, a movable gripper 12, and an adjustment component 13. The movable gripper 12 is rotatably connected to the fixed gripper 11. When the movable gripper 12 rotates, the opening between the movable gripper 12 and the fixed gripper 11 can be adjusted, allowing the gripper structure to be mounted on other objects. These other objects can be planar structures, such as tabletops, or rod-shaped structures, such as stroller rails or bed rails. It should be noted that the objects that can be mounted on the gripper structure in this embodiment are merely illustrative and not intended to limit the use of the gripper structure. In this embodiment, the adjustment component 13 drives the movable gripper 12 to rotate. By adjusting the component 13, the opening between the fixed gripper 11 and the movable gripper 12 can be adjusted, ensuring that the gripper structure can be securely clamped onto the corresponding object.

[0124] like Figure 17As shown, in this embodiment, the fixing clamp 11 includes a body portion 111 and a cover portion 112, wherein the cover portion 112 covers the top of the body portion 111. In this embodiment, the cover portion 112 is a circular cover; in other embodiments, the shape of the cover portion 112 may match the shape of the top of the body portion 111. In this embodiment, the cover portion 112 is detachably connected to the top of the body portion 111, and is installed on the top of the body portion 111 by fasteners such as screws or rivets. It should be noted that the fixing method using fasteners such as screws or rivets is a preferred method to achieve a detachable connection between the cover portion 112 and the body portion 111, and is not intended to limit the scope of this utility model.

[0125] To facilitate easy, quick, and accurate installation of the cover portion 112 onto the body portion 111, such as... Figure 18 As shown, in this embodiment, the body portion 111 and the cover portion 112 are quickly positioned and connected via a first positioning groove 141 and a first positioning post (not shown in the figures). Specifically, the first positioning groove 141 is disposed on an outwardly extending arc-shaped block 113 on the body portion 111. As a preferred technical solution, in this embodiment, the arc-shaped block 113 and the body portion 111 are integrally formed. The first positioning post is disposed at the bottom of the cover portion 112. By positioning and inserting the first positioning post and the first positioning groove 141, the cover portion 112 can be quickly and accurately closed onto the body portion 111.

[0126] As a preferred technical solution, in this embodiment, fasteners such as screws or rivets for connecting the body portion 111 and the cover portion 112 are located at the positions of the first positioning groove 141 and the first positioning post. Specifically, the bottom of the first positioning groove 141 is provided with a through hole, and the first positioning post is provided with a mounting hole. After the first positioning post is inserted into the first positioning groove 141, the fasteners such as screws or rivets are passed through the through hole on the first positioning groove 141 and connected to the mounting hole on the first positioning post, thereby fixing the cover portion 112 to the body portion 111.

[0127] like Figure 17 and Figure 18 As shown, in this embodiment, the main body 111 is formed by two halves joined together and fixed together by fasteners such as screws or rivets. It should be noted that the method of fixing by fasteners such as screws or rivets is a preferred method to achieve the detachable connection of the two halves of the main body 111 and is not intended to limit the present invention.

[0128] Specifically, such as Figure 18As shown, the two halves of the main body 111 are respectively provided with a docking groove 15 and a docking post 16. The docking groove 15 is provided with a mounting ring, and the docking post 16 is provided with a blind hole. When it is necessary to assemble the two halves of the main body 111 together, the docking post 16 is first inserted into the docking groove 15 to achieve docking and positioning of the two halves of the main body 111. Then, fasteners such as screws or rivets are used to abut against the mounting ring and the blind hole on the docking post 16 to achieve a stable connection between the two halves of the main body 111.

[0129] To facilitate the assembly of the fixed clamping member 11 and the movable clamping member 12, such as Figure 17 As shown, in this embodiment, the fixing clamp 11 further includes mounting ears 114, which are used for assembly and connection with the movable clamp 12. In this embodiment, two mounting ears 114 are provided, and the two mounting ears 114 are respectively arranged opposite to each other on the bottom sides of the body 111. As a preferred technical solution, in this embodiment, the mounting ears 114 and the body 111 are integrally formed.

[0130] To facilitate the gripper structure's attachment to rod-shaped objects, such as stroller guardrails or crib rails, etc. Figure 17 As shown, in this embodiment, the bottom of the main body 111 is also provided with a second arc-shaped recess 115. The arc-shaped surface of the second arc-shaped recess 115 can better fit with the surface of the rod-shaped object, thereby improving the clamping firmness of the fixing clamp 11 on the rod-shaped structure. As a preferred technical solution, such as Figure 17 As shown, in this embodiment, the end of the main body 111 near the opening of the gripper structure is provided with an inclined surface 116. The inclined surface 116 can play a guiding role, so that the rod-shaped structure can enter the opening of the gripper structure along the inclined surface 116, thereby making it convenient and quick to clamp the gripper structure 1 onto the rod-shaped structure.

[0131] As a preferred technical solution, such as Figure 18 As shown, in this embodiment, the main body 111 is provided with a plurality of hollow cavities 117 at intervals. The hollow cavity 117 can reduce the overall weight of the gripper structure. When the gripper structure is assembled and used with a portable fan, the fan can be made lighter and easier to carry.

[0132] like Figure 17 As shown, in this embodiment, the movable clamping member 12 includes a clamping part 121 and an assembly part 122. The clamping part 121 is disposed opposite to the bottom of the main body part 111 and is used to clamp an object. The assembly part 122 is rotatably connected to two assembly ears 114 via a rotating shaft 17. As a preferred technical solution, in this embodiment, the assembly part 122 and the clamping part 121 are integrally formed. As a preferred technical solution, such as... Figure 17As shown, in this embodiment, the bottom of the movable clamping member 12 is provided with a plurality of strip-shaped grooves 123 at intervals. The grooves 123 not only save materials and reduce costs, but also reduce weight. When the clamping structure is assembled with the fan body, the fan can be made lighter and easier to carry.

[0133] In this embodiment, the adjusting component 13 is used to drive the movable clamping member 12 to rotate. The adjusting component 13 can adjust the opening degree between the fixed clamping member 11 and the movable clamping member 12, allowing the gripper structure to firmly clamp onto the corresponding object. For example... Figures 16-18 As shown, in this embodiment, the adjusting component 13 includes a screw 131. In this embodiment, the clamping part 121 is provided with a mounting through hole 124 at one end near the assembly part 122. A connecting block 132 is provided in the mounting through hole 124. In this embodiment, the connecting block 132 is cylindrical. The screw 131 passes through the connecting block 132 radially and is threadedly connected to the connecting block 132. The clamping part 122 is provided with a clearance hole 125 for the screw 131 to pass through.

[0134] like Figure 18 As shown, in this embodiment, one end of the screw 131 extends into the hollow cavity 117 within the body portion 111. The bottom of the body portion 111 is provided with an assembly port 118 for the screw 131 to extend into the hollow cavity 117. The other end of the screw 131 is provided with a handle 133, which facilitates user rotation of the screw. A cap 134 is provided at the end of the screw 131 located in the hollow cavity 117. The cap 134 is screwed onto the end of the screw 131, preventing the screw 131 from dislodging from the assembly port 118. As a preferred embodiment, the end of the screw 131 extending into the hollow cavity 117 is also provided with a bearing 135.

[0135] In this embodiment, rotating the screw 131 causes the movable clamping member 12 to rotate via the connecting block 132, thereby adjusting the opening size between the movable clamping member 12 and the fixed clamping member 11. This facilitates the gripper structure clamping objects of different sizes and shapes. Furthermore, when the screw 131 is not rotating, the position of the movable clamping member 12 can be locked, meaning the opening size between the movable clamping member 12 and the fixed clamping member 11 can be locked, thus ensuring the gripper structure 1 is securely clamped onto the corresponding object.

[0136] As a preferred technical solution, in this embodiment, the gripper structure 1 is detachably mounted on the base 2. This detachable arrangement of the fan body and the gripper structure allows users to choose the appropriate way to use the fan according to their needs. Specifically, the fan body can be clamped onto a table or a rod-like object, such as a stroller rail or bed rail, or it can be held in hand or placed alone on a table, further expanding the fan's usage scenarios. Figures 19-21 As shown, in this embodiment, the gripper structure 1 is detachably mounted on the base 2 via a press-and-buckle structure. The detachable arrangement of the fan body and the gripper structure allows the fan body to be used individually by hand or placed on a table, or it can be used in conjunction with the gripper structure to clamp onto a table or rod-shaped structure, making the portable fan suitable for more usage scenarios.

[0137] like Figure 21 As shown, in this embodiment, the base 2 includes a seat body 21 with a bottom opening and a bottom cover 22. The bottom cover 22 is detachably connected to the bottom of the seat body 21. In this embodiment, the bottom cover 22 and the seat body 21 are connected by fasteners such as screws or rivets. It should be noted that the method of fixing with fasteners such as screws or rivets is a preferred method to achieve the detachable connection between the seat body 21 and the bottom cover 22, and is not intended to limit the scope of this utility model.

[0138] like Figure 21 As shown, the press-lock structure in this embodiment includes a press-lock 8 and a first elastic element 9. The first elastic element 9 is used to drive the press-lock 8 to reset. The first elastic element 9 is abutted against the press-lock 8. Both the press-lock 8 and the first elastic element 9 are installed in the base 2. The bottom cover 22 is provided with a slide rail 221. In this embodiment, two press-locks 8 are provided. The two press-locks 8 are arranged opposite each other in the base 2 and are slidably installed in the slide rail 221. The two press-locks 8 can move towards each other or away from each other. In this embodiment, the first elastic element 9 is a spring, and the first elastic element 9 abuts between the two press-locks 8.

[0139] like Figure 21 As shown, in this embodiment, the pressing buckle 8 includes a main body 81, a pressing part 82, and a buckle part 83. The main body 81 is slidably mounted on the slide rail 221. The pressing part 82 is fixedly disposed at one end of the main body 81, and at least partially extends beyond the base 2 for easy pressing by the user. A through hole is provided on the side wall of the base 2 for the pressing part 82 to extend out. A first elastic member 9 abuts against the other end of the main body 81, and a protrusion 84 is provided at the end of the main body 81 that abuts against the first elastic member 9. The end of the first elastic member 9 is sleeved on the protrusion 84. The protrusion 84 improves the stability of the first elastic member 9. When the pressing parts 82 of the two pressing buckles 8 are pressed simultaneously, the two pressing buckles move towards each other and compress the first elastic member 9. When the pressing force on the pressing part 82 is released, the two pressing buckles 8 can move back to their original positions under the elastic action of the first elastic member 9.

[0140] like Figure 21 As shown, the latching part 83 is located at the bottom of the main body 81, and the bottom cover 22 has two openings for the latching parts 83 of the two pressing latches 8 to extend out. The latching parts 83 extend out of the base 2 and can engage with the locking structure provided on the gripper structure. Figure 21As shown, in this embodiment, the latching part 83 is L-shaped. Figure 16 , Figure 17 , Figure 19 and Figure 20 As shown, in this embodiment, the top of the cover portion 112 is provided with a docking portion 18, and the docking portion 18 is provided with a snap-fit ​​structure. In this embodiment, the snap-fit ​​structure is set as a snap-fit ​​groove 181. Specifically, in this embodiment, the inner sidewalls at both ends of the snap-fit ​​groove 181 are provided with horizontally recessed snap-fit ​​recesses 182, and the snap-fit ​​portion 83 can snap into the snap-fit ​​recesses 182. When the snap-fit ​​portions 83 of the two pressing snap-fit ​​8 are respectively snapped into the two snap-fit ​​recesses 182 of the docking portion 18, the fan body can be fixedly assembled onto the clamping structure.

[0141] When the fan body needs to be removed from the fixed clamp 11, press the pressing parts 82 of the two pressing buckles 8 simultaneously. The two pressing buckles 8 move in the pressing direction and compress the first elastic member 9. At this time, the buckle part 83 can be disengaged from the snap-fit ​​groove 181, that is, the snap-fit ​​state between the buckle part 83 and the snap-fit ​​recess 182 is released. Then the fan body can be removed from the clamp structure. When the fan body needs to be installed on the clamp structure, press the pressing parts 82 of the two pressing buckles 8 simultaneously. The first elastic member 9 is in a compressed state, placing the buckle part 83 in the snap-fit ​​groove 181. Stop pressing the pressing parts 82. The first elastic member 9 drives the two pressing buckles 8 to reset. At this time, the two buckle parts 83 can be re-snapped in the two snap-fit ​​recesses 182 on the snap-fit ​​groove 181, realizing a stable assembly of the fan body and the clamp structure.

[0142] As a preferred technical solution, such as Figure 21 As shown, the bottom of the bottom cover 22 is provided with a docking recess 222 for accommodating the docking part 163. Two openings on the bottom cover 22 for the latching part 83 to extend from are located on the bottom wall of the docking recess 222. The shape of the docking recess 222 matches that of the docking part 18. For ease of docking, the docking part 18 in this embodiment is frustum-shaped, and correspondingly, the docking recess 222 is also frustum-shaped. When the fan body needs to be assembled onto the gripper structure, the docking part 18 can be placed in the docking recess 222 of the bottom cover 22. The docking recess 222 can position the gripper structure, thus facilitating the quick and accurate placement of the latching part 83 into the latching groove 181.

[0143] In this embodiment, the gripper structure and the fan body are detachably connected, allowing users to choose the appropriate way to use the fan according to their needs. The fan body can be clamped onto a table or a rod-like object, such as a stroller rail or bed rail. It can also be held in hand or placed alone on a table, further expanding the fan's usage scenarios. This invention allows for easy separation of the gripper structure and fan body, or installation of the fan body onto the gripper structure, simply by pressing the snap-fit ​​mechanism. This makes the installation and removal of the fan body and gripper structure very simple and quick.

[0144] In other embodiments, the gripper structure can also be adapted to be installed on the bottom of the fan body in Embodiment 2. It can also be adapted to be detachably connected to the bottom of the base of the fan body in Embodiment 2 by pressing the buckle.

[0145] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A fan body, characterized in that: The device includes a fan head, which comprises a housing, a connecting housing disposed inside the housing, an air inlet housing with an air inlet channel, and an air outlet housing with an air outlet channel. The housing is a cylindrical structure with openings at both ends, with the two ends being an air inlet end and an air outlet end, respectively. The air inlet housing is disposed at the air inlet end of the housing, and the air outlet housing is disposed at the air outlet end of the housing. The air outlet housing includes a first outer cylinder portion, a first inner cylinder portion, and a plurality of first connecting plates. The end of the connecting housing facing the air outlet end of the housing is in close contact with the end of the first outer cylinder portion facing the air inlet end of the housing. The first inner cylinder portion is located inside the first outer cylinder portion and includes a pressure surface that increases radially from the air inlet end of the housing to the air outlet end of the housing. The plurality of first connecting plates are circumferentially spaced between the first outer cylinder portion and the first inner cylinder portion, and the interval between two adjacent first connecting plates forms the air outlet channel.

2. The fan body according to claim 1, characterized in that: The connecting housing includes a second outer cylinder portion with at least a portion of equal diameter. The end of the second outer cylinder portion facing the air outlet end of the housing is tightly abutted against the end of the first outer cylinder portion facing the air inlet end of the housing. The fan head also includes a fan assembly located inside the second outer cylinder portion. The fan assembly includes fan blades and a motor assembly for driving the fan blades to rotate. The motor assembly is mounted on the side of the air outlet housing facing the air inlet end of the housing and is connected to the fan blades.

3. The fan body according to claim 2, characterized in that: The fan blade includes an assembly cylinder, a hub, and a plurality of blades evenly spaced along the circumference of the hub and fixed to the outer wall of the hub. The hub is a cover structure with one end open and the other end sealed. The assembly cylinder is located at the open end of the hub and is at least partially located inside the hub. A portion of the motor assembly is assembled inside the assembly cylinder. The interior of the hub is provided with a first mounting sleeve connected to the output shaft of the motor assembly. A plurality of reinforcing plates are provided between the outer wall of the first mounting sleeve and the inner wall of the hub along the circumference of the first mounting sleeve.

4. The fan body according to claim 3, characterized in that: The hub includes a wind guide section and a blade connecting section connected along the hub's axial direction. Several blades are evenly spaced along the circumference of the hub and fixed on the outer wall of the blade connecting section. The axial length L1 of the wind guide section is 1 / 10 to 3 / 10 of the axial length L0 of the entire hub.

5. The fan body according to claim 3, characterized in that: The connecting housing further includes a second inner cylinder portion, which is located inside the second outer cylinder portion, and the end of the second inner cylinder portion near the air outlet end of the outer casing is fixedly connected to the end of the second outer cylinder portion near the air outlet end of the outer casing; the second inner cylinder portion includes an inner surface portion that is disposed toward the hub and at least partially increases radially from the air inlet end of the outer casing toward the air outlet end of the outer casing.

6. The fan body according to claim 2, characterized in that: The first outer cylinder portion extends outward beyond the first inner cylinder portion towards the air outlet end of the outer casing, and the first outer cylinder portion is connected to a portion of the top side of the first connecting plate; the second outer cylinder portion extends forward towards the air outlet end of the outer casing to form a second outer cylinder extension portion, the second outer cylinder extension portion abuts against the end of the first outer cylinder portion towards the air inlet end of the outer casing, and the inner sidewall of the second outer cylinder extension portion smoothly transitions to the inner sidewall of the first outer cylinder portion, and the inner sidewall of the second outer cylinder extension portion abuts against the top side of the first connecting plate.

7. The fan body according to claim 6, characterized in that: The first outer cylinder portion includes a first outer cylinder connecting portion and a first outer cylinder extension portion. One end of the first outer cylinder connecting portion abuts against the second outer cylinder extension portion, and the other end is connected to the first outer cylinder extension portion. The first outer cylinder extension portion is flared.

8. The fan body according to claim 2, characterized in that: The first inner cylinder is a cylindrical structure with openings at both ends. A mounting partition is provided radially inside the first inner cylinder. The motor assembly is mounted on the side of the mounting partition facing the air inlet end of the outer casing. A first cover is provided at the end of the first inner cylinder facing the air outlet end of the outer casing. The front surface of the first cover is a plane, a concave surface formed by backward indentation, or a convex surface formed by forward outward convexity. A lighting assembly is provided between the side of the mounting partition facing the air outlet end of the outer casing and the first cover.

9. The fan body according to claim 8, characterized in that: The lighting assembly includes a mounting base and an LED bead board. The mounting base is fitted onto the side of the mounting partition facing the air outlet end of the housing. The side of the mounting base facing the air outlet end of the housing is recessed inward to form a receiving cavity. The LED bead board is disposed inside the receiving cavity. The first cover is detachably connected to the cavity opening of the mounting base. The side wall of the mounting base located between the end of the first inner cylinder and the first cover is made of transparent or semi-transparent material.

10. The fan body according to claim 1, characterized in that: The first connecting plate has a flat plate structure and is arranged on the outer side wall of the first inner cylinder along the axial direction of the first inner cylinder. Alternatively, the first connecting plate may be bent and inclined along the circumference of the first inner cylinder from the air outlet end of the outer shell to the air inlet end of the outer shell, so that the two opposite sides of the first connecting plate form an outward convex surface and an inward concave surface, respectively, with the outward convex surface facing the air inlet end of the outer shell and the inward concave surface facing the air outlet end of the outer shell.

11. The fan body according to any one of claims 1-10, characterized in that: The outer wall of the air inlet housing is fixedly provided with a fixing protrusion, which is detachably provided at the air inlet end of the housing by means of a first fastener; Or / and the end of the connecting housing facing the air inlet end of the outer shell is connected to an assembly ring, and the air inlet housing is connected to the assembly ring by a snap-fit ​​structure.

12. A portable fan, characterized in that, The fan body includes the fan body as described in any one of claims 1-11 and a fixing structure for fixing the fan body to another object. The fan body also includes a base, the fan head is disposed on the base, and the base is connected to the fixing structure.

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