Portable fan

Abstract

The utility model discloses a portable fan which comprises a fan shell, an air inlet, a fan cover and an air outlet. The fan shell is internally provided with an air duct. The assembly base is arranged in the air duct, and the assembly base is connected with the fan shell through a plurality of stator blades which are arranged in a surrounding mode; the fan assembly is arranged in the air duct, and the fan assembly is connected with the assembling seat; the PCB is arranged in the assembly seat, and a plurality of assembly gaps are formed between at least part of the structure of the PCB and the inner wall of the assembly seat; and the decoration panel is provided with a connecting support, and the connecting support is inserted into the multiple assembling gaps and is connected with the assembling base. The installation space of the decoration panel connecting support is obviously enlarged by arranging the multiple assembly gaps between the PCB and the inner wall of the assembly base, and the precision requirement caused by space limitation in the assembly process is lowered.

Description

Technical Field

[0001] This application relates to the field of fans, and more particularly to a portable fan. Background Technology

[0002] In the hot summer, fans have become an essential item for people to relieve the heat. With people's demand for convenient use, lighter and more portable fans are becoming increasingly popular.

[0003] In existing technologies, decorative panels typically need to be assembled with the PCB circuit board inside the fan. Because the PCB circuit board occupies considerable space and has a complex structure, the assembly method for decorative panels mainly relies on interference fits. Interference fits rely solely on the tight fit between components to achieve a connection; however, they are prone to loosening under external force or prolonged use, affecting the stability of the decorative panel. Interference fits require high assembly precision, necessitating precise control of component dimensions and fit clearances. In actual production, component machining errors or improper assembly operations can easily lead to assembly difficulties or even damage to components. Utility Model Content

[0004] The purpose of this application is to provide a portable fan that is easy to assemble and has good connection stability.

[0005] This application provides a portable fan, including:

[0006] A fan housing, wherein an air duct is provided inside the fan housing;

[0007] The mounting base is disposed within the air duct and is connected to the fan housing via a plurality of circumferentially arranged stationary blades;

[0008] A fan assembly is disposed within the air duct and is connected to the mounting base;

[0009] A PCB circuit board, wherein the PCB circuit board is disposed within the mounting base, and at least a portion of the structure of the PCB circuit board is provided with multiple mounting gaps between it and the inner wall of the mounting base;

[0010] A decorative panel is provided with a connecting bracket, which is inserted into the plurality of assembly gaps and connected to the assembly base.

[0011] Optionally, the mounting base is provided with multiple connecting platforms, and the PCB circuit board is connected to each of the multiple connecting platforms respectively, with an assembly gap between adjacent connecting platforms; and / or,

[0012] The mounting base abuts against the fan assembly, the internal space of the mounting base is connected to the fan assembly, and a communication notch is provided at the end of the fan assembly that abuts against the mounting base.

[0013] Optionally, the connecting bracket includes a plurality of first connecting plates and a plurality of second connecting plates. The decorative panel is provided with the plurality of first connecting plates and the plurality of second connecting plates on the side facing the PCB circuit board. The plurality of first connecting plates and the plurality of second connecting plates are arranged alternately. The plurality of first connecting plates are all located above the plurality of connecting platforms. The plurality of second connecting plates are all inserted into the plurality of assembly gaps and connected to the assembly base.

[0014] Optionally, the length of any one of the plurality of first connecting plates is less than the length of any one of the plurality of second connecting plates.

[0015] Optionally, a first latch is protruding at the location of the plurality of assembly gaps, and each of the plurality of second connecting plates is provided with a first latch that cooperates with the first latch; or,

[0016] A first slot is recessed at the location of the plurality of assembly gaps, and a second claw that cooperates with the first slot is provided on each of the plurality of second connecting plates.

[0017] Optionally, at least one of the plurality of connecting platforms extends a third claw towards the decorative panel, and the PCB circuit board has a snap-fit ​​notch at the corresponding position of the third claw, the snap-fit ​​notch being located between the connecting platform and the third claw.

[0018] Optionally, a movable gap is provided between the third claw and the mounting base, and the first connecting plate of the plurality of first connecting plates corresponding to the third claw is inserted into the movable gap to limit the range of motion of the third claw.

[0019] Optionally, a positioning protrusion is provided on any one of the plurality of connecting platforms, and a first positioning notch is provided on the PCB circuit board at the location of the positioning protrusion.

[0020] Optionally, a second positioning notch is provided on the first connecting plate corresponding to the positioning protrusion among the plurality of first connecting plates, and the opening direction of the first positioning notch is perpendicular to the opening direction of the second positioning notch.

[0021] Optionally, the PCB circuit board includes a plurality of first sides and a plurality of second sides, all of the plurality of first sides being connected to the connecting platform, and all of the plurality of second sides forming the assembly gap with the inner wall of the mounting base, and the length of any one of the plurality of first sides being less than the length of any one of the plurality of second sides.

[0022] The beneficial effects of this application embodiment are as follows: By setting multiple assembly gaps between the PCB circuit board and the inner wall of the mounting base, the installation space of the decorative panel connecting bracket is significantly expanded. This not only reduces the precision requirements caused by space constraints during assembly but also increases the friction force through the contact surface between the connecting bracket and the gap sidewall. The PCB circuit board acts as a radial shrinkage preventer for the connecting bracket, utilizing its rigidity to form a physical barrier. When the connecting bracket is subjected to external force, the PCB circuit board can prevent the bracket from shifting in the radial shrinkage direction, making the connection between the connecting bracket and the mounting base tighter and less prone to disconnection. Simultaneously, the gap design between the PCB circuit board and the inner wall of the mounting base also considers heat dissipation requirements. The heat generated by the PCB circuit board during operation can be diffused to other spaces within the mounting base through the assembly gaps, increasing the heat dissipation space, improving heat dissipation efficiency, preventing damage to the PCB circuit board in high-temperature environments, and extending its service life. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the overall structure of a portable fan according to a specific embodiment of this application;

[0025] Figure 2 This is a cross-sectional schematic diagram of a portable fan according to a specific embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the third housing according to a specific embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the structure of a decorative panel according to a specific embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the structure of a PCB circuit board according to a specific embodiment of this application.

[0029] Figure Descriptions: 1. Fan housing; 11. First housing; 12. Second housing; 13. Third housing; 14. Air duct; 2. Mounting base; 21. Stationary blade; 22. Connecting platform; 23. Assembly gap; 24. First claw; 25. Third claw; 26. Movement gap; 27. Positioning protrusion; 3. Fan assembly; 31. Fan motor; 32. Fan blade; 33. Motor housing; 34. Flexible sleeve; 4. PCB circuit board; 41. First side; 42. Second side; 43. Snap-fit ​​notch; 44. First positioning notch; 5. Decorative panel; 51. First connecting plate; 511. Second positioning notch; 52. Second connecting plate; 521. First buckle. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] like Figure 1 and Figure 2 As shown, a portable fan includes: a fan housing 1, with an air duct 14 disposed inside the fan housing 1; a mounting base 2, disposed inside the air duct 14, and connected to the fan housing 1 via a plurality of circumferentially arranged stationary blades 21; a fan assembly 3, disposed inside the air duct 14, and connected to the mounting base 2; a PCB circuit board 4, disposed inside the mounting base 2, and having at least a portion of its structure with a plurality of mounting gaps 23 between it and the inner wall of the mounting base 2; and a decorative panel 5, on which a connecting bracket is disposed, the connecting bracket being inserted into the plurality of mounting gaps 23 and connected to the mounting base 2.

[0033] The fan housing 1 in this embodiment includes a first housing 11, a second housing 12, and a third housing 13. The first housing 11 is fitted onto the second housing 12, and the third housing 13 is inserted into the second housing 12. The fan assembly 3 is connected to the third housing 13, and each air inlet penetrates both the first housing 11 and the second housing 12. However, the structure of the fan housing 1 is not limited to this. Depending on the specific application scenario, in some embodiments, the fan housing 1 can be formed by splicing two half-housings together front and back or top and bottom; in some embodiments, the fan housing 1 can be formed by splicing three or more housings together. There are many ways to assemble the fan housing 1, and users can choose according to their needs, which is not limited here.

[0034] The fan assembly 3 includes a fan motor 31 and fan blades 32. The motor assembly can be (but is not limited to): a single-phase motor, a two-phase motor, or a three-phase motor. The fan assembly 3 can have an external rotor or an internal rotor structure.

[0035] In this embodiment, the fan assembly 3 has a modular structure. Specifically, the fan assembly 3 includes a motor housing 33, a fan motor 31, and fan blades 32, with the fan motor 31 and fan blades 32 disposed within the motor housing 33. However, the structure of the fan assembly 3 is not limited to this. Depending on the specific application scenario, in some embodiments, the fan assembly 3 includes a fan motor 31 and fan blades 32. A mounting base 2 is provided inside the fan housing 1, the fan motor 31 is connected to the mounting base 2, the fan blades 32 are connected to the fan motor 31, and multiple stationary blades 21 are connected between the fan housing 1 and the mounting base 2.

[0036] In this embodiment, the mounting base 2 is used to cooperate with the fan assembly 3 to form an air guide channel. The internal space of the mounting base 2 is used to support the PCB circuit board 4.

[0037] In this embodiment, the PCB circuit board 4 is used to control the digital display screen. However, the function of the PCB circuit board 4 is not limited to this. Depending on the specific application scenario, in some embodiments, the PCB circuit board 4 can also be used (but is not limited to): controlling the fan assembly 3, controlling the semiconductor cooling chip, controlling the atomizer, etc. In some embodiments, the PCB circuit board 4 is also used to implement two or more of the above control functions.

[0038] In this embodiment, the decorative panel 5 can be a light-transmitting panel used in conjunction with a digital display screen to display numerical values ​​and images. However, the decorative panel 5 is not limited to this. Depending on the specific application scenario, in some embodiments, the decorative panel 5 can be a decorative plastic or metal panel. In products with semiconductor cooling function, the decorative panel 5 can be a semiconductor sheet or a heat-conducting metal sheet. In products with atomizer function, the decorative panel 5 can be the atomizing air outlet panel of the atomizer.

[0039] In the above embodiments, by providing multiple assembly gaps 23 between the PCB circuit board 4 and the inner wall of the mounting base 2, the installation space of the decorative panel 5 connecting bracket is significantly expanded. This not only reduces the precision requirements caused by space constraints during assembly but also increases friction through the contact surface between the connecting bracket and the gap sidewall. The PCB circuit board 4 acts as a radial shrinkage preventer for the connecting bracket, forming a physical barrier using its rigidity. When the connecting bracket is subjected to external force, the PCB circuit board 4 can prevent the bracket from shifting in the radial shrinkage direction, making the connection between the connecting bracket and the mounting base 2 tighter and less prone to disconnection. Simultaneously, the gap design between the PCB circuit board 4 and the inner wall of the mounting base 2 also considers heat dissipation requirements. The heat generated by the PCB circuit board 4 during operation can be diffused to other spaces in the mounting base 2 through the assembly gaps 23, increasing the heat dissipation space, improving heat dissipation efficiency, preventing damage to the PCB circuit board 4 in high-temperature environments, and extending its service life.

[0040] like Figure 3 As shown, the assembly base 2 is provided with multiple connecting platforms 22, and the PCB circuit board 4 is connected to the multiple connecting platforms 22 respectively. An assembly gap 23 is provided between two adjacent connecting platforms 22.

[0041] In this embodiment, the number of connection stations 22 is 3. However, the number of connection stations 22 is not limited to this. Depending on the specific application scenario, in some embodiments, the number of connection stations 22 can be (but is not limited to): 2, 4, 5 or more.

[0042] The connecting platform 22 is constructed in an arc shape. However, the shape of the connecting platform 22 is not limited to this. The purpose of the connecting platform 22 is to provide support for the PCB circuit board 4. Therefore, any shape of the connecting platform 22 that can achieve this purpose can be used in this embodiment, and will not be described in detail here.

[0043] The connection between the connecting platform 22 and the PCB circuit board 4 is a snap-fit ​​connection. However, the connection between the connecting platform 22 and the PCB circuit board 4 is not limited to this. Depending on the specific application scenario, in some implementations, the connection between the connecting platform 22 and the PCB circuit board 4 can be (but is not limited to): riveting, screwing, adhesive bonding, etc.

[0044] Multiple connecting platforms 22 are spaced apart and connected to the PCB circuit board 4, forming a multi-point contact overhead support structure. Compared to traditional integral mounting bases, this design reduces material consumption by decreasing the physical contact area of ​​the connecting platforms 22. The assembly gaps 23 between the connecting platforms 22 form a through-type heat dissipation channel, which, together with the overhead posture of the PCB board, constructs a three-dimensional convection path, further improving heat dissipation efficiency. The discontinuous contact interface formed by the discrete connecting platforms 22 can interrupt the continuous transmission of vibration waves between the mounting base 2 and the PCB board, reducing the vibration frequency and amplitude of the PCB circuit board 4, thus extending the service life of the PCB circuit board 4.

[0045] In some embodiments, the mounting base 2 and the fan assembly 3 abut against each other, the internal space of the mounting base 2 is connected to the fan assembly 3, and a communication notch is provided at the end of the fan assembly 3 that abuts against the mounting base 2.

[0046] The mounting base 2 and the fan assembly 3 abut against each other, and the internal space of the mounting base 2 is connected to the fan assembly 3. This allows some of the protruding structures of the fan assembly 3 to extend into the mounting base 2, making full use of the existing material's spatial structure and making the overall structure of the portable fan more compact. When the fan runs at high speed, the connecting notch acts as a pressure relief channel, balancing the air pressure difference between the mounting base 2 and the fan assembly 3, preventing resonance of the PCB circuit board 4 inside the mounting base 2 due to sudden pressure changes. The design of the connecting notch also allows the airflow generated by the fan assembly 3 to directly enter the interior of the mounting base 2, accelerating the dissipation of heat inside the mounting base 2. The end faces of the mounting base 2 and the fan assembly 3 abut against each other, forming a short-range force transmission chain. When the fan assembly 3 rotates, high-frequency vibration is indirectly transmitted at the abutment point, reducing the vibration frequency of the mounting base 2 and lowering the risk of resonance between the fan assembly 3 and the mounting base 2.

[0047] In some embodiments, the fan assembly 3 further includes a flexible sleeve 34, which is fitted onto the motor housing 33 and abuts against the mounting base 2. The flexible sleeve 34 not only reduces the frequency and amplitude of vibration transmitted from the fan assembly 3 to the fan housing 1, but also further reduces the risk of resonance between the mounting base 2 and the fan assembly 3.

[0048] like Figure 4 As shown, in some embodiments, the connecting bracket includes a plurality of first connecting plates 51 and a plurality of second connecting plates 52. The decorative panel 5 is provided with a plurality of first connecting plates 51 and a plurality of second connecting plates 52 on the side facing the PCB circuit board 4. The plurality of first connecting plates 51 and the plurality of second connecting plates 52 are arranged alternately. The plurality of first connecting plates 51 are all located above the plurality of connecting platforms 22, and the plurality of second connecting plates 52 are all inserted into the plurality of assembly gaps 23 and connected to the assembly base 2.

[0049] In this embodiment, the number of first connecting plates 51 is 3. However, the number of first connecting plates 51 is not limited to this. Depending on the specific application scenario, in some embodiments, the number of first connecting plates 51 is (not limited to): 2, 4, 5 or more.

[0050] In this embodiment, the number of second connecting plates 52 is 3. However, the number of second connecting plates 52 is not limited to this. Depending on the specific application scenario, in some embodiments, the number of second connecting plates 52 is (not limited to): 2, 4, 5 or more.

[0051] In this embodiment, there is a gap between the first connecting plate 51 and the connecting platform 22. However, the positional relationship between the first connecting plate 51 and the connecting platform 22 is not limited to this. Depending on the specific application scenario, in some embodiments, the first connecting plate 51 and the corresponding connecting platform 22 abut against each other.

[0052] Through the alternating arrangement of multiple first connecting plates 51 and second connecting plates 52, a multi-point connection is formed between the decorative panel 5 and the mounting base 2. This multi-point connection significantly increases the contact area and friction, making the connection between the decorative panel 5 and the mounting base 2 more secure and effectively preventing loosening or detachment due to external impact or long-term use. The alternating arrangement of the first connecting plates 51 and second connecting plates 52 ensures that the connection force is evenly distributed across all parts of the decorative panel 5, preventing connection failure due to excessive local stress. This evenly distributed connection further improves the stability of the decorative panel 5. The first connecting plate 51 is located above the connecting platform 22, and the second connecting plate 52 is inserted into the assembly gap 23. This design makes the fit between the connecting bracket and the mounting base 2 more precise. Through this precise fit, the decorative panel 5 can be accurately installed on the mounting base 2, reducing assembly errors. The alternating arrangement of the first connecting plate 51 and the second connecting plate 52 forms a spatially interlocked fixing system. The first connecting plate 51 is above the connecting platform 22, which restricts the movable space of the decorative panel 5 in the axial direction. The second connecting plate 52 is inserted into the assembly gap 23, which limits the movable space of the decorative panel 5 in the radial direction, thereby improving the connection stability of the decorative panel 5.

[0053] In some embodiments, the length of any one of the plurality of first connecting plates 51 is less than the length of any one of the plurality of second connecting plates 52.

[0054] Because of its shorter length, the first connecting plate 51 is prioritized for initial assembly, providing a guiding reference for the insertion of the second connecting plate 52 into the assembly gap 23. The shorter length of the first connecting plate 51 creates a high-rigidity zone that preferentially bears the load when the decorative panel 5 is subjected to vertical pressure, suppressing panel collapse and deformation. The longer length of the second connecting plate 52 enhances bending resistance and absorbs energy through elastic deformation during lateral impacts. The difference in length between the first and second connecting plates 51 and 52 creates an asymmetric mechanical response, making the connection of the decorative panel 5 more stable and its resistance to external forces stronger.

[0055] In some embodiments, a first claw 24 is provided at the location of multiple assembly gaps 23, and a first buckle 521 that cooperates with the first claw 24 is provided on multiple second connecting plates 52.

[0056] In some embodiments, a first slot is recessed at the location of multiple assembly gaps 23, and multiple second connecting plates 52 are provided with second claws that cooperate with the first slot.

[0057] The second connecting plate 52 is connected to the mounting base 2 by a snap-fit ​​connection, which improves assembly efficiency. The PCB circuit board 4 provides anti-retraction support for the second connecting plate 52 in the radial shrinkage direction, making it difficult for the second connecting plate 52 to disengage from the mounting base 2, and further improving the connection stability.

[0058] like Figure 5 As shown, in some embodiments, at least one of the multiple connecting platforms 22 extends a third claw 25 towards the decorative panel 5, and the PCB circuit board 4 has a snap-fit ​​notch 43 at the corresponding position of the third claw 25, the snap-fit ​​notch 43 being located between the connecting platform 22 and the third claw 25.

[0059] The third claw 25 engages with the locking notch 43 on the PCB circuit board 4 to form a stable mechanical locking structure. This design effectively prevents the PCB circuit board 4 from loosening or shifting within the mounting base 2, ensuring its stability during operation. Through the engagement of the locking notch 43 and the third claw 25, the PCB circuit board 4 is fixed in the X, Y, and Z directions, preventing shaking caused by vibration or external forces. The locking structure allows for quick assembly and disassembly without the need for screws or other auxiliary tools. This design significantly reduces assembly time and costs, improving production efficiency.

[0060] In some embodiments, a movable gap 26 is provided between the third claw 25 and the mounting base 2, and the first connecting plate 51 of the plurality of first connecting plates 51 corresponding to the third claw 25 is inserted into the movable gap 26 to limit the range of motion of the third claw 25.

[0061] The first connecting plate 51 is inserted into the movable gap 26, restricting the radial range of motion of the third claw 25. This design is similar to the function of a retainer, effectively preventing the third claw 25 from radially sliding or loosening when subjected to external force. Through the retaining action of the first connecting plate 51, the third claw 25 is firmly restricted in the radial direction. Combined with the design of the snap-fit ​​notch 43, the PCB circuit board 4 is stably fixed in multiple directions, further enhancing the overall connection stability.

[0062] In some embodiments, a positioning protrusion 27 is provided on any one of the multiple connecting platforms 22, and a first positioning notch 44 is provided on the PCB circuit board 4 at the location of the positioning protrusion 27.

[0063] The engagement of the positioning protrusion 27 and the first positioning notch 44 ensures precise alignment of the PCB circuit board 4 during assembly, eliminating the need for additional fixing devices or measurements during assembly. This design makes the assembly process more intuitive and simple, reducing assembly errors. The engagement of the positioning protrusion 27 and the first positioning notch 44 not only limits the PCB circuit board 4 in the axial direction but also restricts its rotation in the circumferential direction, effectively preventing the PCB circuit board 4 from rotating or shifting due to vibration or external forces during operation. Through the synergistic action of the connecting platform 22, the third jaw 25, and the positioning protrusion 27, the PCB circuit board 4 is effectively fixed in multiple directions. This all-around limiting design significantly reduces the loosening or damage of the PCB circuit board 4 caused by vibration or impact, improving the product's shock resistance.

[0064] In some embodiments, a second positioning notch 511 is provided on the first connecting plate 51 corresponding to the positioning protrusion 27 among the plurality of first connecting plates 51, and the opening direction of the first positioning notch 44 is perpendicular to the opening direction of the second positioning notch 511.

[0065] In this embodiment, a portion of the structure of the first connecting plate 51 corresponding to the second positioning notch 511 is disposed between the inner wall of the mounting base 2 and the PCB circuit board 4. However, the positional relationship between the first connecting plate 51 and the PCB circuit board 4 is not limited thereto. Depending on the specific application scenario, in some embodiments, the first connecting plate 51 is disposed above the PCB circuit board 4. In this embodiment, the first connecting plate 51 plays an axial limiting role for the PCB circuit board 4.

[0066] The positioning protrusion 27 is used not only for positioning and limiting the PCB circuit board 4, but also for positioning and limiting the decorative panel 5 by cooperating with the second positioning notch 511 on the decorative panel 5. This design makes the positioning protrusion 27 reusable, reducing the use of additional positioning elements and simplifying the structure. The opening directions of the first positioning notch 44 and the second positioning notch 511 are perpendicular to each other, so that the PCB circuit board 4 and the decorative panel 5 can be effectively positioned and limited in two different directions. The multi-dimensional positioning system further improves the accuracy and stability of assembly. At the same time, when the first connecting plate 51 is placed above the PCB circuit board 4, the first connecting plate 51 plays an axial limiting role for the PCB circuit board 4, further improving the stability of the PCB circuit board 4 installation.

[0067] In some embodiments, the PCB circuit board 4 includes a plurality of first sides 41 and a plurality of second sides 42. The plurality of first sides 41 are all connected to the connecting platform 22, and the plurality of second sides 42 form an assembly gap 23 with the inner wall of the mounting base 2. The length of any one of the plurality of first sides 41 is less than the length of any one of the plurality of second sides 42.

[0068] In this embodiment, the number of first side edges 41 is 3. However, the number of first side edges 41 is not limited to this. Depending on the specific application scenario, in some embodiments, the number of first side edges 41 is (not limited to): 2, 4, 5 or more.

[0069] In this embodiment, the number of second side edges 42 is 3. However, the number of second side edges 42 is not limited to this. Depending on the specific application scenario, in some embodiments, the number of second side edges 42 is (not limited to): 2, 4, 5 or more.

[0070] The longer, suspended second side 42 creates a larger airflow space between the PCB board 4 and the mounting base 2. This design optimizes the airflow path, improves heat dissipation efficiency, and prevents damage to the PCB board 4 due to heat buildup. The longer second side 42 provides more suspended space for the PCB board 4, allowing the air to cushion vibrations and reduce vibration transmission when subjected to shocks or external forces.

[0071] It should be noted that any of the embodiments in this example can be implemented independently or in combination with one or more other embodiments. When implementing in combination, the combination method should not be limited to the combination methods listed in this example.

[0072] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application 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 application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. 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 portable fan, characterized in that, include: A fan housing, wherein an air duct is provided inside the fan housing; The mounting base is disposed within the air duct and is connected to the fan housing via a plurality of circumferentially arranged stationary blades; A fan assembly is disposed within the air duct and is connected to the mounting base; A PCB circuit board, wherein the PCB circuit board is disposed within the mounting base, and at least a portion of the structure of the PCB circuit board is provided with multiple mounting gaps between it and the inner wall of the mounting base; A decorative panel is provided with a connecting bracket, which is inserted into the plurality of assembly gaps and connected to the assembly base.

2. The portable fan according to claim 1, characterized in that, The assembly base has multiple connecting platforms inside, and the PCB circuit board is connected to each of the multiple connecting platforms. An assembly gap is provided between adjacent connecting platforms; and / or... The mounting base abuts against the fan assembly, the internal space of the mounting base is connected to the fan assembly, and a communication notch is provided at the end of the fan assembly that abuts against the mounting base.

3. The portable fan according to claim 2, characterized in that, The connecting bracket includes multiple first connecting plates and multiple second connecting plates. The decorative panel is provided with the multiple first connecting plates and multiple second connecting plates on the side facing the PCB circuit board. The multiple first connecting plates and multiple second connecting plates are arranged alternately. The multiple first connecting plates are all located above the multiple connecting platforms. The multiple second connecting plates are all inserted into the multiple assembly gaps and connected to the assembly base.

4. The portable fan according to claim 3, characterized in that, The length of any one of the plurality of first connecting plates is less than the length of any one of the plurality of second connecting plates.

5. The portable fan according to claim 4, characterized in that, A first locking claw is protruding at the location of the plurality of assembly gaps, and a first latch is provided on each of the plurality of second connecting plates to cooperate with the first locking claw; or... A first slot is recessed at the location of the plurality of assembly gaps, and a second claw that cooperates with the first slot is provided on each of the plurality of second connecting plates.

6. The portable fan according to claim 3, characterized in that, At least one of the multiple connecting platforms extends a third claw towards the decorative panel, and the PCB circuit board has a snap-fit ​​notch at the corresponding position of the third claw, the snap-fit ​​notch being located between the connecting platform and the third claw.

7. The portable fan according to claim 6, characterized in that, A movable gap is provided between the third claw and the mounting base. The first connecting plate of the plurality of first connecting plates corresponding to the third claw is inserted into the movable gap to limit the range of motion of the third claw.

8. The portable fan according to claim 3, characterized in that, A positioning protrusion is provided on any one of the plurality of connecting platforms, and a first positioning notch is provided on the PCB circuit board at the location of the positioning protrusion.

9. The portable fan according to claim 8, characterized in that, A second positioning notch is provided on the first connecting plate corresponding to the positioning protrusion among the plurality of first connecting plates, and the opening direction of the first positioning notch is perpendicular to the opening direction of the second positioning notch.

10. The portable fan according to claim 2, characterized in that, The PCB circuit board includes multiple first sides and multiple second sides. The multiple first sides are all connected to the connecting platform, and the multiple second sides form the assembly gap with the inner wall of the mounting base. The length of any one of the multiple first sides is less than the length of any one of the multiple second sides.

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