Portable mini plug-in fan

Abstract

A portable mini direct insertion fan, including a cylindrical shell, a brushless fan, a control circuit board and a charging plug; the cylindrical shell includes a bottom wall, a peripheral side wall and a top wall; the top wall is provided with a plurality of air outlet holes, and the bottom wall is provided with a plurality of air inlet holes; the brushless fan and the control circuit board are arranged in the cylindrical shell; the brushless fan includes a brushless motor and an impeller at the bottom; the impeller faces the air inlet holes of the bottom wall; the charging plug is connected with the control circuit board, and the control circuit board is connected with the input end at the top of the brushless motor; the peripheral side wall of the cylindrical shell is provided with an opening, and the charging plug extends out of the cylindrical shell transversely through the opening; the charging plug is used for being plugged into an external charging interface to realize power supply for the fan; the traditional battery is omitted, and the charging interface is directly used to take power from the outside, so that a portable mini direct insertion fan with small size, light weight, convenient use and environmental protection is realized.

Description

Technical Field

[0001] This utility model relates to a mini fan, and more particularly to a portable mini plug-in fan. Background Technology

[0002] The advent of portable mini fans has greatly improved people's quality of life in high-temperature environments. Compared to traditional large fans, portable mini fans are small and easy to carry, easily fitting into backpacks, handbags, or even pockets, providing users with coolness anytime, anywhere. Whether hiking outdoors, on public transportation, or in the office or classroom, portable mini fans can provide users with instant comfort. Furthermore, portable mini fans are very flexible in their use; users can choose to hold them, place them on a table, or clip them to an object, greatly improving their convenience.

[0003] A handheld mini fan with a base (CN211778108U); a portable multi-functional power bank fan (CN210738883U); a mini fan and phone case combo accessory (CN111608943A); most of the above portable mini fans rely on their own batteries or rechargeable batteries for power.

[0004] While the aforementioned technologies have solved the power supply problem to some extent, they have also brought a series of drawbacks. First, fans with batteries are more expensive. Battery manufacturing requires special materials and processes, which increases production costs. Furthermore, the performance and quality of the battery directly affect the fan's lifespan and performance. High-quality batteries are expensive, while low-quality batteries may not provide stable power or even pose safety hazards.

[0005] Secondly, portable mini fans with batteries are relatively large and heavy. The battery takes up most of the internal space of the fan, making it difficult to further reduce its size. This not only affects the fan's portability but also limits its use in some confined spaces. For example, for users who need to carry it for extended periods, a heavier fan increases the burden and reduces comfort.

[0006] Furthermore, batteries have a limited lifespan. Over time, battery capacity gradually decreases, leading to shorter fan lifespan. Users need to replace batteries regularly, which not only increases operating costs but also causes inconvenience. At the same time, the disposal of discarded batteries is a significant environmental issue. Batteries contain various harmful substances, and improper handling can cause serious environmental pollution. In recent years, with increasing environmental awareness, people have paid more attention to the disposal of discarded batteries, which also poses a challenge to the sustainability of battery-powered portable mini fans.

[0007] Finally, batteries also pose a certain risk of spontaneous combustion. If a battery is subjected to external impact, short circuit, or overheating during use, it may spontaneously combust or even explode, posing a threat to the personal safety and property of users. In recent years, safety incidents caused by battery problems have occurred frequently, which has also raised consumer concerns about the safety of portable mini fans with batteries.

[0008] In conclusion, while existing portable mini fans offer certain conveniences, their reliance on built-in or rechargeable batteries results in high costs, large size, and heavy weight. Furthermore, the limited battery lifespan, environmental concerns, and risk of spontaneous combustion all restrict the further development and application of portable mini fans. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide a portable mini fan that eliminates the need for a battery and simplifies the structure, and draws power from mobile phones, tablets, laptops with PD, power adapters with PD interfaces or power banks through a built-in charging interface.

[0010] The technical solution of this utility model to solve the above-mentioned technical problems is: a portable mini plug-in fan, including a cylindrical shell, a brushless fan, a control circuit board and a charging plug; The cylindrical shell includes a bottom wall, peripheral side walls, and a top wall; the top wall is provided with multiple air outlets, and the bottom wall is provided with multiple air inlets; The brushless fan and control circuit board are housed inside the cylindrical housing. The brushless fan includes a brushless motor and an impeller at the bottom; the impeller faces the air inlet on the bottom wall; The charging plug is connected to the control circuit board, which is connected to the input terminal on top of the brushless motor. The cylindrical shell has an opening on its peripheral sidewall, and the charging plug extends laterally through the opening and out of the cylindrical shell; the charging plug is used to plug into the charging interface of a mobile communication terminal or a power bank to provide power to the fan.

[0011] A further preferred embodiment of this utility model is that the inner cavity of the cylindrical housing matches the outer contour of the brushless motor; the two are tightly fitted to ensure that the brushless motor is securely installed inside the cylindrical housing and to prevent it from shaking during operation.

[0012] A further preferred embodiment of this utility model is that the extension direction of the charging plug is perpendicular to the central axis of the brushless motor, so that after the charging plug extends out of the cylindrical housing, it can be easily plugged into an external charging interface.

[0013] A further preferred embodiment of this utility model is as follows: the control circuit board includes a charging circuit and a motor drive circuit; when the charging plug is inserted into the charging interface, the charging circuit enables the brushless fan to obtain power from the mobile communication terminal or power bank, and at the same time, the motor drive circuit can control the brushless fan to start and operate normally, thereby realizing the fan's blowing function.

[0014] A further preferred embodiment of this utility model is: the cylindrical shell includes a lower bottom shell and an upper cap, wherein the outer diameter of the bottom shell is smaller than the outer diameter of the cap; this facilitates the overall assembly and disassembly of the fan; The opening is located on the side wall of the cap; the top wall is on the cap, and the bottom wall is on the bottom shell.

[0015] A further preferred embodiment of this invention is that the charging plug is Type-C, Type-A, or Lightning.

[0016] Another technical topic: a portable mini plug-in fan, including a housing, a brushless fan, a control circuit board, and a charging plug; The brushless fan and control circuit board are housed within the housing; the housing is provided with an air outlet and an air inlet. The brushless fan includes a brushless motor and an impeller at the bottom; the impeller faces the air inlet. The charging plug is connected to the control circuit board, which is connected to the input terminal on top of the brushless motor. The housing has an opening, through which the charging plug extends out of the housing; the charging plug is used to plug into a mobile communication terminal, such as a mobile phone, tablet, laptop with PD, power adapter with PD interface, or charging port of a power bank. The control circuit board includes a charging circuit and a driving circuit. When the charging plug is inserted into the charging interface, the charging circuit enables the brushless fan to obtain power from a mobile communication terminal, a power adapter with a PD interface, or a power bank. At the same time, the motor driving circuit can control the brushless fan to start and operate normally, realizing the fan's blowing function.

[0017] A further preferred embodiment of this utility model is: the shell is a cylindrical shell, including a peripheral side wall, a bottom wall and a top wall; The air inlet is located on the bottom wall, the air outlet is located on the top wall, and the opening is located on the peripheral side wall; The charging plug extends laterally through the opening and is located outside the housing.

[0018] A further preferred embodiment of this utility model is that the extension direction of the charging plug is perpendicular to the central axis of the brushless motor, so that after the charging plug extends out of the cylindrical housing, it can be easily plugged into an external charging interface.

[0019] A further preferred embodiment of this utility model is that the inner cavity of the housing matches the outer contour of the brushless motor; the two are tightly fitted to ensure that the brushless motor is securely installed in the housing and to prevent it from shaking during operation.

[0020] Compared with existing technologies, the advantages of this invention are: by omitting the battery component in traditional portable mini fans, the size and weight of the fan are significantly reduced. This not only makes the fan lighter and easier for users to carry, but also optimizes space utilization efficiency. The compact structure of the cylindrical shell further enhances the product's portability, allowing it to be easily placed in a backpack, handbag, or even a pocket.

[0021] In addition, the reasonable layout of the air outlet and air inlet on the casing ensures smooth airflow and improves the fan's heat dissipation efficiency, enabling it to quickly provide cooling for users in various usage scenarios and meet people's immediate cooling needs in outdoor, public transportation, office, or study settings.

[0022] The integrated design of the control circuit board organically combines the charging circuit and the motor drive circuit, enabling precise control of the brushless fan while drawing power from external devices. This design not only improves the stability of fan operation but also ensures its compatibility and reliability under different power conditions, providing users with a continuous and stable cooling experience.

[0023] Furthermore, this technical solution significantly enhances ease of use by directly connecting to mobile phones, tablets, laptops with PD (Power Distribution) technology, power adapters with PD interfaces, or power banks via its built-in charging port. Users do not need to carry additional power adapters or batteries; simply plug the charging plug into their mobile phone, tablet, laptop with PD, power adapter with PD interface, or power bank to power the fan anytime, anywhere, easily enjoying coolness. This not only simplifies the usage process but also reduces the costs and environmental issues associated with battery replacement and disposal. Omitting the battery component not only reduces product cost and weight but also reduces the potential environmental pollution from discarded batteries, aligning with modern environmental protection concepts and demonstrating strong sustainability. Attached Figure Description

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0025] Figure 1 Schematic diagram of the overall structure of the direct-plug fan Figure 1 ; Figure 2 Schematic diagram of the overall structure of the direct-plug fan Figure 2 ; Figure 3 This is a diagram illustrating the usage status of a direct-plug fan. Figure 1 ; Figure 4 This is a diagram illustrating the usage status of a direct-plug fan. Figure 2 ; Figure 5 This is a diagram illustrating the usage status of a direct-plug fan. Figure 3 ; Figure 6 Disassembly diagram of the through-hole fan structure Figure 1 ; Figure 7 Disassembly diagram of the through-hole fan structure Figure 2 ; Figure 8 This is a schematic diagram of the internal structure of a through-hole fan; Figure 9 This utility model Figure 4 Enlarged view of point A in the middle; Figure 10 This utility model Figure 5 Enlarged view at point B in the middle; Figure 11 This is a diagram illustrating the application scenario of this utility model. Detailed Implementation

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it will not be further defined and explained in subsequent figures.

[0028] A portable mini plug-in fan 100 includes a housing 10, a brushless fan 20, a control circuit board 30, and a charging plug 40; the housing is preferably cylindrical or near-cylindrical. The housing 10 is preferably cylindrical or near-cylindrical, which is not only aesthetically pleasing but also makes efficient use of space, making the overall size of the fan smaller and easier to carry.

[0029] This technical solution eliminates the need for traditional batteries and switches, drawing power directly from mobile devices (such as mobile phones 102 or power banks 103) via its built-in charging plug 40 to enable instant fan startup. Combining a compact cylindrical housing 10 design with a highly efficient brushless fan, this solution provides a small, lightweight, easy-to-use, and environmentally friendly portable mini plug-in fan 100.

[0030] The cylindrical housing 10 includes a bottom wall 13, peripheral side walls 12, and a top wall 11. The top wall 11 has multiple air outlet holes 01, and the bottom wall 13 has multiple air inlet holes 03. This air inlet and outlet design ensures smooth airflow and improves heat dissipation efficiency.

[0031] The brushless fan 20 and control circuit board 30 are housed within a cylindrical housing 10. The brushless fan 20 includes a brushless motor 21 and an impeller 22 at the bottom, with the impeller 22 facing the air inlet 03 on the bottom wall 13. This technology improves airflow efficiency and reduces noise. Compared to traditional motors, brushless motors offer higher efficiency and longer lifespan while reducing maintenance costs. The control circuit board 30 integrates a charging circuit and a motor drive circuit, enabling it to draw power from a mobile communication terminal or power bank and control the start-up and operation of the brushless fan.

[0032] The charging plug 40 connects to the control circuit board 30 and further connects to the input terminal of the brushless motor 21, ensuring efficient and stable power transmission. An opening 02 is provided on the peripheral sidewall 12 of the cylindrical housing 10, through which the charging plug 40 extends laterally outside the housing. This not only saves space but also facilitates user insertion.

[0033] It should be noted that the charging plug 40 in this invention supports multiple interface types such as Type-C, Type-A, or Lightning, making it compatible with the charging ports 101 of common mobile communication terminals on the market, such as mobile phones, tablets, laptops with PD, power adapters with PD interfaces, or power banks, thus providing a stable power supply for the fan 100. This compatibility greatly improves the ease of use of the portable mini direct-plug fan, allowing users to enjoy coolness anytime, anywhere without carrying additional power equipment.

[0034] In summary, through this ingenious structural design, the Portable Mini Direct Plug Fan 100 not only achieves miniaturization and portability, but also ensures versatility and ease of use on different devices, meeting the needs of modern users for convenience, efficiency, and multifunctionality.

[0035] Preferably, in this invention, the inner cavity of the cylindrical housing 10 is tightly fitted to the outer contour of the brushless motor 20, and the two adopt a tight-fit structure. This technique not only ensures the stable installation of the brushless motor 20 within the housing 10, preventing noise or performance degradation due to vibration or shaking during operation, but also improves the compactness and stability of the overall structure. Through precise dimensional matching and tight fit, the brushless motor 20 can maintain good positioning within the housing 10, thereby maintaining efficient and stable performance even during long-term operation.

[0036] Preferably, in the configuration of the portable mini plug-in fan 100, the extension direction of the charging plug 40 is carefully set perpendicular to the central axis of the brushless motor 20. This unique structural layout allows the charging plug 40 to be plugged into the external charging interface 101 in a natural and ergonomic manner after extending from the cylindrical housing 10. This not only improves the convenience for users in actual use but also ensures the stability and reliability of the plugging process. The vertical extension direction allows users to easily align the charging plug 40 with the interface when inserting it into a mobile communication terminal or power bank, reducing plugging difficulties caused by angle issues. This optimized structural design further enhances the overall performance and user experience of the portable mini plug-in fan 100.

[0037] In addition, the control circuit board 30 integrates a charging circuit and a motor drive circuit, which work together to ensure efficient fan operation. When the charging plug 40 is inserted into an external charging interface 101 (such as a mobile communication terminal 102 or a power bank 103), the charging circuit automatically starts to obtain a stable power supply from these external devices.

[0038] Meanwhile, the motor drive circuit precisely controls the start-up and operation of the brushless fan 20, ensuring optimal performance under various working conditions to achieve the fan's blowing function. This integrated circuit design not only improves the product's reliability and stability but also optimizes energy efficiency, ensuring the fan provides a continuous and stable cooling experience in various usage scenarios.

[0039] Moreover, by eliminating complex switch designs and additional circuitry, the aforementioned technologies reduce the overall complexity of the product, decrease potential points of failure, and lower production costs. Users do not need to perform complex operations; simply plugging the charging plug into an external device will automatically start and run the fan, greatly improving convenience and user experience.

[0040] More specifically, to further optimize the structure of the portable mini plug-in fan 100, the cylindrical housing 10 is cleverly divided into two parts: a lower bottom shell a1 and an upper cap a2. This segmented design not only facilitates the overall assembly and disassembly of the fan but also improves the product's maintainability and scalability.

[0041] The outer diameter of the bottom shell a1 is smaller than that of the shell cap a2. This dimensional difference allows the bottom shell a1 to be tightly embedded in the shell cap a2, forming a stable integral structure. The bottom of the bottom shell a1 is provided with a bottom wall 13, on which multiple air inlets 03 are evenly distributed. These air inlets 03 provide a stable airflow input to the brushless fan 20, ensuring that the fan can operate efficiently.

[0042] The outer diameter of the cap a2 is relatively large, and the top is provided with a top wall 11. Multiple air outlets 01 are evenly distributed on the top wall 11. These air outlets 01 blow out the airflow accelerated by the brushless fan 20 evenly, bringing coolness to the user. The side wall of the cap a2 is provided with an opening 02. The charging plug 40 extends laterally out of the shell through this opening, making it convenient for the user to insert the charging plug 40 into the charging interface 101 of a mobile communication terminal, such as a mobile phone, tablet, laptop, power adapter, or power bank.

[0043] This segmented design not only simplifies the assembly process but also allows the various components of the fan to be more tightly integrated, improving overall stability and durability. At the same time, it also facilitates product maintenance and upgrades; users can easily disassemble the housing a2 to inspect or replace the internal brushless fan 20 and control circuit board 30.

[0044] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Similarly, "first" and "second" are only for ease of understanding and have no other directional meaning, and cannot be considered as limitations on this utility model.

[0045] This invention introduces a convenient mini direct-plug fan. Specific examples are used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments are merely for the purpose of helping to understand this invention and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A portable mini direct-plug fan, characterized in that: It includes a cylindrical housing, a brushless fan, a control circuit board, and a charging plug; The cylindrical shell includes a bottom wall, peripheral side walls, and a top wall; the top wall is provided with multiple air outlets, and the bottom wall is provided with multiple air inlets; The brushless fan and control circuit board are housed inside the cylindrical housing. The brushless fan includes a brushless motor and an impeller at the bottom; the impeller faces the air inlet on the bottom wall; The charging plug is connected to the control circuit board, which is connected to the input terminal on top of the brushless motor. The cylindrical shell has an opening on its peripheral sidewall, and the charging plug extends laterally through the opening and out of the cylindrical shell; the charging plug is used to plug into the charging interface of a mobile communication terminal or a power bank to provide power to the fan.

2. The portable mini direct-plug fan according to claim 1, characterized in that: The inner cavity of the cylindrical housing matches the outer contour of the brushless motor; the two are tightly fitted to ensure that the brushless motor is securely installed inside the cylindrical housing and to prevent it from shaking during operation.

3. The portable mini direct-plug fan according to claim 1, characterized in that: The charging plug extends perpendicularly to the central axis of the brushless motor, allowing it to be easily plugged into an external charging interface after extending out of the cylindrical housing.

4. The portable mini direct-plug fan according to claim 1, characterized in that: The control circuit board includes a charging circuit and a motor drive circuit. When the charging plug is inserted into the charging interface, the charging circuit enables the brushless fan to obtain power from the mobile communication terminal or power bank. At the same time, the motor drive circuit can control the brushless fan to start and operate normally, realizing the fan's blowing function.

5. The portable mini direct-plug fan according to claim 1, characterized in that: The cylindrical housing includes a lower bottom shell and an upper cap, with the outer diameter of the bottom shell being smaller than the outer diameter of the cap; this facilitates the overall assembly and disassembly of the fan. The opening is located on the side wall of the cap; the top wall is on the cap, and the bottom wall is on the bottom shell.

6. The portable mini direct-plug fan according to claim 1, characterized in that: The charging plug is Type-C, Type-A, or Lightning.

7. A portable mini direct-plug fan, characterized in that: Includes housing, brushless fan, control circuit board and charging plug; The brushless fan and control circuit board are housed within the housing; the housing is provided with an air outlet and an air inlet. The brushless fan includes a brushless motor and an impeller at the bottom; the impeller faces the air inlet. The charging plug is connected to the control circuit board, which is connected to the input terminal on top of the brushless motor. The housing has an opening, through which the charging plug extends out of the housing; the charging plug is used to plug into the charging interface of a mobile communication terminal, power adapter, or power bank. The control circuit board includes a charging circuit and a driving circuit; When the charging plug is inserted into the charging interface, the charging circuit enables the brushless fan to obtain power from the mobile communication terminal, power adapter, or power bank. At the same time, the drive circuit can control the brushless fan to start and operate normally, realizing the fan's blowing function.

8. The portable mini direct-plug fan according to claim 7, characterized in that: The shell is a cylindrical shell, including a peripheral side wall, a bottom wall and a top wall; The air inlet is located on the bottom wall, the air outlet is located on the top wall, and the opening is located on the peripheral side wall; The charging plug extends laterally through the opening and is located outside the housing.

9. The portable mini direct-plug fan according to claim 8, characterized in that: The charging plug extends perpendicularly to the central axis of the brushless motor, allowing it to be easily plugged into an external charging interface after extending out of the cylindrical housing.

10. The portable mini plug-in fan according to claim 7, characterized in that: The inner cavity of the housing matches the outer contour of the brushless motor; the two are tightly fitted to ensure that the brushless motor is securely installed in the housing and to prevent it from shaking during operation.

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