Wearable mini fan

Abstract

This utility model discloses a wearable miniature fan, comprising: a flat base with a battery inside; a fan section disposed on the upper surface of the base, the fan section including a fan tube, and a motor and a fan impeller sequentially arranged along the axial direction inside the fan tube; and a fixing part for detachable mounting to a thin-walled object; wherein one side of the base is damped and rotatably connected to the fixing part, and the length and width dimensions of the base are not greater than the length and width dimensions of the fan tube. By making the base flat and housing the battery, and adjusting the size to be no larger than the size of the fan tube, the fan becomes particularly compact and portable, and the fixing part allows the miniature fan to be placed in various environments, expanding its application range.

Description

Technical Field

[0001] This utility model relates to the field of consumer electronics products, and in particular to a wearable miniature fan. Background Technology

[0002] In the field of portable cooling devices for summer, handheld fans are widely used due to their lightweight and easy-to-operate features, but existing products still have significant pain points in terms of portability and flexibility of use.

[0003] While most handheld fans are marketed as "mini," their overall dimensions are generally larger than 15cm × 5cm × 3cm, requiring considerable space when folded. This makes them particularly unsuitable for users carrying small bags or engaging in outdoor activities. Some products employ a folding structure to compress size, but even when folded, they still need to be stored separately and cannot be integrated with small items like keys or earphones, thus offering limited improvement in actual portability.

[0004] A more prominent problem lies in the limitations of usage scenarios: existing handheld fans all rely on continuous handheld operation, making it impossible to free up one's hands in scenarios such as office work, exercise, and cooking. For example, when working at a desk, users need to hold the fan to provide airflow, which restricts actions such as writing and operating a mouse; wearing a handheld fan during outdoor exercise can increase the burden on the limbs and poses a risk of dropping it; when cooking in the kitchen, the steamy and humid environment may affect the stability of holding the fan. Although a few "desktop stand" improved products have appeared on the market, the stand structure is complex and non-removable, which increases the weight of the device (generally by 50-100g) and loses the flexibility of handheld mode.

[0005] Furthermore, the fixed handheld mode prevents users from adjusting the fan's angle according to the environment, making it difficult to meet the needs of scenarios such as floor cooling and tabletop airflow. Existing technologies have not yet effectively resolved the technical contradiction between "ultra-miniature size" and "fixed use in multiple scenarios," and there is an urgent need to achieve further reduction in device size and breakthroughs in diversified usage methods through structural innovation.

[0006] Therefore, it is necessary to propose a new type of wearable miniature fan to solve the above problems. Utility Model Content

[0007] Purpose of the utility model: In order to overcome the shortcomings of the existing technology, this utility model provides a wearable miniature fan that improves the cooling effect.

[0008] Technical solution: A wearable miniature fan, comprising:

[0009] A flat base, with a battery installed inside the base;

[0010] A fan section is provided on the upper surface of the base. The fan section includes a fan duct, and a motor and a fan impeller are arranged sequentially along the axial direction inside the fan duct.

[0011] A fixing part for detachable mounting to a thin-walled object;

[0012] One side of the base is damped and rotatably connected to the fixing part, and the length and width dimensions of the base are not greater than the length and width dimensions of the air duct.

[0013] Furthermore, the air outlet end of the fan section is provided with a variable diameter section for making the air outlet orifice diameter gradually smaller.

[0014] Furthermore, at least one end of the base is provided with a lug.

[0015] Furthermore, a filter screen is provided at the air inlet end of the fan section.

[0016] Furthermore, the fan impeller is configured as a first fan impeller and a second fan impeller, with the first fan impeller located near the air inlet end of the air duct and the second fan impeller located near the air outlet end of the air duct, and the motor located between the first fan impeller and the second fan impeller.

[0017] Furthermore, the deflection angle of the first impeller blade is greater than that of the second impeller blade.

[0018] Furthermore, the fixing part is a clip.

[0019] Furthermore, the clamp and the base are movably connected by a rotating seat, the base can be tilted relative to the clamp, and the rotating seat is rotatably connected to the clamp, so that the clamp can rotate around the axis of the rotating seat.

[0020] Beneficial effects: This wearable miniature fan, by setting the substrate to a flat shape and incorporating a battery, and adjusting the size to no larger than the size of the fan tube, makes the fan particularly small and portable. Furthermore, the fixing part allows the miniature fan to be placed in various environments, expanding its range of applications. Attached Figure Description

[0021] Appendix Figure 1 This is a perspective view of one embodiment of the wearable miniature fan of this utility model;

[0022] Appendix Figure 2 for Figure 1 A cross-sectional view of the wearable miniature fan shown.

[0023] Appendix Figure 3 for Figure 1 The diagram shows the rotation of a wearable miniature fan. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] It should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0026] See Figure 1-3 An embodiment of the wearable miniature fan of this utility model is shown, comprising: a base 1, a fan section 2, and a fixing section 3. The base 1 is flat and houses a battery 11. The fan section 2 is disposed on the upper surface of the base 1 and includes a fan tube 21. A motor 24 and a fan impeller are sequentially arranged along the axial direction inside the fan tube 21. The fixing section 3 is used for detachable mounting to a thin-walled object. One side of the base 1 is damped and rotatably connected to the fixing section 3, and the length and width dimensions of the base 1 are not greater than the length and width dimensions of the fan tube 21.

[0027] The components of this wearable miniature fan are cleverly connected to achieve functional integration and optimized portability. The flat base 1 is made of ABS engineering plastic or PC and other polymer materials. A thin lithium battery 11 is embedded in the hollow space inside. The battery 11 is electrically connected to the fan unit 2 through a circuit board. A charging interface is provided on the side of the base 1, and a power switch and LED power indicator can be integrated on the surface. The fan unit 2 is vertically fixed to the upper surface of the base 1, and its cylindrical air duct 21 is connected to the base 1 at the bottom. Inside the air duct 21, along the axial direction, an air inlet filter 26, a first fan impeller 25, a motor 24, a second fan impeller 23, and a variable diameter section 22 are arranged sequentially. The two ends of the motor 24 shaft are respectively interference-fitted with the first fan impeller 25 and the second fan impeller 23 to form a coaxial drive structure.

[0028] The fixing part 3 is a clip, which is movably connected to the base 1 via a rotating seat 13. The base 1 can rotate 0-270° relative to the clip. The rotating seat 13 is a damped rotating seat, allowing the base 1 to stop during pitch rotation. One end of the clip is connected to the rotating seat 13 at the midpoint of the side of the base 1 via a damping shaft. This damping shaft can be composed of a shaft core nested with a silicone damping sleeve. The shaft core passes through the connection hole between the base 1 and the clip and is locked with a nut. The silicone damping sleeve provides moderate rotational resistance, allowing the base 1 to stop at any angle within the range of 0-360°. A hanging ear 12 extends from either end of the base 1. The through hole of the hanging ear 12 can be used to thread accessories such as nylon lanyards or keychains.

[0029] The filter 26 at the air inlet of the fan section 2 is made of metal microporous mesh and is embedded into the end face of the air duct 21 by a snap-fit. The first fan impeller 25 is close to the air inlet and has 5 arc-shaped fan blades with a relatively gentle deflection angle to increase the air intake and form an axial vortex. The second fan impeller 23 is located in the middle of the air duct 21 near the air outlet and has 14 straight fan blades with a relatively steep deflection angle to convert the kinetic energy of the air into static pressure energy through high-speed rotation. The variable diameter section 22 at the air outlet is a tapered truncated cone structure, and the outlet diameter is 10%-40% smaller than the inner diameter of the air duct 21 to guide the airflow to accelerate and reduce diffusion.

[0030] The matching size design of the base 1 and the blower 21, combined with a flat shape, results in a well-controlled overall thickness, allowing it to easily fit into a pocket or be hung around the neck. The built-in lithium battery 11 avoids the bulkiness of external attachment, and the USB-C interface supports fast charging, meeting both portability and battery life requirements. The flexible connection of the damping hinge allows the base 1 to flexibly adjust the airflow angle—when fixed to a collar, it can blow air downwards at 45° to the face; when clipped to a backpack shoulder strap, it can blow air upwards to the back of the neck; and when placed flat on a table, it can deliver air vertically, breaking through the angle limitations of traditional fans.

[0031] The coordinated design of the dual impellers and the variable diameter section 22 enhances airflow efficiency: the large-angle blades of the first impeller 25 increase the air intake volume, while the small-angle blades of the second impeller 23 reduce radial airflow loss. The variable diameter section 22 further accelerates the airflow, increasing the outlet speed by 30% compared to a single impeller, while reducing turbulence noise and achieving stronger cooling effect with the same power consumption. The combination of the clip and hanging ear 12 in the fixing part 3 expands the usage scenarios—the clip opening, combined with the silicone anti-slip pad, can securely hold various thin-walled objects such as collars and backpack straps, while the hanging ear 12 supports hanging in tents, strollers, and other locations, balancing stability and flexibility. The air intake filter prevents dust and hair from entering the motor 24, the rubber shock-absorbing pad reduces vibration transmission, and the matte finish on the inner wall of the fan duct 21 reduces noise, making the fan suitable for long-term use in quiet environments such as libraries and offices.

[0032] This structural design organically integrates portability, functionality, and comfort, providing an efficient and flexible solution for personal heat dissipation.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A wearable micro fan, characterized by, include: A flat base, with a battery installed inside the base; A fan section is provided on the upper surface of the base. The fan section includes a fan duct, and a motor and a fan impeller are arranged sequentially along the axial direction inside the fan duct. A fixing part for detachable mounting to a thin-walled object; One side of the base is damped and rotatably connected to the fixing part, and the length and width dimensions of the base are not greater than the length and width dimensions of the air duct.

2. The wearable micro fan of claim 1, wherein: The air outlet end of the fan section is provided with a variable diameter section to make the air outlet orifice diameter gradually decrease.

3. The wearable miniature fan according to claim 1, characterized in that: At least one end of the base is provided with a lug.

4. The wearable miniature fan according to claim 1, characterized in that: A filter screen is provided at the air inlet of the fan section.

5. The wearable miniature fan according to claim 1, characterized in that: The fan impeller is configured as a first fan impeller and a second fan impeller. The first fan impeller is located near the air inlet end of the air duct, and the second fan impeller is located near the air outlet end of the air duct. The motor is located between the first fan impeller and the second fan impeller.

6. The wearable miniature fan according to claim 5, characterized in that: The deflection angle of the first impeller is greater than that of the second impeller.

7. The wearable miniature fan according to any one of claims 1-6, characterized in that: The fixing part is a clip.

8. The wearable miniature fan according to claim 7, characterized in that: The clamp and the base are movably connected by a rotating seat. The base can be tilted relative to the clamp. The rotating seat is rotatably connected to the clamp, so that the clamp can rotate around the axis of the rotating seat.

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