A detachable and adjustable handheld fan

Abstract

This utility model pertains to portable heat dissipation devices. Addressing the limitations of traditional handheld fans, such as limited application scenarios and fixed airflow, it provides a detachable and adjustable handheld fan. The fan assembly includes a fan component, a housing component, a battery, and a control component. The housing component has a straight handle shape, and the bottom connector features a rotating thread structure to accommodate the external threads of mainstream sunshade umbrella rods, enabling switching between handheld and fixed modes. The connector has anti-slip textures. The fan component is rotatably connected to the housing component via a T-shaped connector, allowing for stable rotation from 0-180° forward and backward. The control component includes a PCBA board, a silicone switch button, a Type-C charging port, and a silicone waterproof cover. It supports three wind speeds and is suitable for various outdoor heat dissipation needs.

Description

Technical Field

[0001] This utility model belongs to the field of portable heat dissipation devices, and in particular relates to a detachable and adjustable handheld fan. Background Technology

[0002] With the increasing demand for outdoor activities and high temperatures in summer, handheld fans have become an important tool for daily cooling due to their portability and ability to provide airflow anytime. However, existing handheld fans suffer from limited functionality and poor adaptability to various scenarios: most handheld fans can only be used independently and cannot be combined with common outdoor sun umbrellas, forcing users to hold both the fan and the umbrella handle simultaneously when seeking shade outdoors, which is inconvenient; at the same time, traditional handheld fans have fixed airflow directions or limited adjustment ranges, requiring users to frequently adjust their hand posture to obtain the ideal airflow, which can easily lead to fatigue after prolonged use; in addition, the airflow structure of some fans conflicts with the design of the grip area, resulting in high wind resistance and low airflow efficiency, making it difficult to meet users' multiple needs for convenience, flexibility, and practicality.

[0003] Therefore, designing a handheld fan that can be flexibly adapted to parasols, has an adjustable airflow direction, and integrates battery life is key to solving the current handheld fan's poor adaptability and unsatisfactory user experience. Utility Model Content

[0004] To address the problems of existing handheld fans, such as limited application scenarios, fixed airflow direction, and inconvenience of use, this utility model provides a detachable and adjustable handheld fan. Through a detachable connection structure, a rotatable airflow design, and three-speed wind control, it achieves multi-scenario adaptability and flexible air supply, thereby improving the user experience.

[0005] The technical solution of this utility model is as follows: A detachable and adjustable handheld fan includes a fan assembly, a housing assembly, a battery, and a control assembly. The housing assembly is in the shape of a straight handle, with the fan assembly rotatably connected to its top. The battery and control assembly are integrated inside the housing assembly. The battery is electrically connected to the control assembly, and the control assembly is electrically connected to the fan assembly, for realizing the on / off control and speed adjustment of the fan. Furthermore, the housing assembly includes a front shell, a rear shell, and a connector. The front shell and the rear shell are fixedly spliced ​​together by snaps or screws to form a hollow, straight handle structure. The connector is fixed to the bottom of the housing assembly, and its end has a threaded design. The thread specification is compatible with the umbrella stick interface of mainstream sun umbrellas on the market. It can be detachably connected to the sun umbrella by screwing the thread together. When tightened, the fan is fixed to the umbrella stick, freeing up the hands; when unscrewed, it returns to an independent handheld fan, meeting the needs of multiple usage scenarios. At the same time, the surface of the connector is treated with anti-slip texture to improve the grip stability when holding it and prevent slipping due to sweat.

[0006] Furthermore, the fan assembly is located at the bottom of the housing assembly (straight handle) and is rotatably connected to the housing assembly via a T-shaped connector. The rotational damping force of the T-shaped connector is set to 5-8N, ensuring that the fan assembly can rotate easily while remaining fixed at any angle and not shifting with shaking. The fan assembly can rotate 0-180° around the housing assembly. When the user holds the straight handle, they can adjust the fan's airflow direction at any time according to the heat dissipation needs of the head, neck, etc. (such as pointing forward at the face or backward at the back of the neck), solving the problem of "single airflow angle" of traditional fixed fans.

[0007] Furthermore, the fan assembly includes a front fan housing, fan blades, a fan cylinder, and a rear fan housing. The fan cylinder has a cylindrical structure, and a drive motor is fixed inside by a motor bracket. The fan blades are mounted on the output shaft of the drive motor and are integrally injection molded from ABS engineering plastic with a thickness of 1.2-1.5mm, which has lightweight and wind resistance characteristics. The front fan housing and the rear fan housing are respectively fastened to the front and rear ends of the fan cylinder. The front housing has honeycomb-shaped air inlet holes (hole diameter 2-3mm to prevent foreign objects from being drawn in), and the rear housing has an annular air outlet grille with a grid tilt angle of 30°, which can guide the airflow to concentrate and blow out, improving heat dissipation efficiency.

[0008] Furthermore, the control component includes a PCBA board, a switch button, a charging port, and a waterproof cover. The PCBA board is fixed inside the housing assembly by an insulating bracket to avoid direct contact with the battery. The switch button is embedded in the side of the housing assembly, made of silicone, with a pressing travel of 0.8-1mm and clear feedback. A short press turns the device on / off, and a 3-second long press switches between three fan speeds (low speed 500r / min, medium speed 800r / min, and high speed 1200r / min) to meet different heat dissipation requirements. The charging port is a Type-C interface, located on the side of the housing assembly, and is compatible with mainstream charging cables. The waterproof cover is made of silicone and is interference-fitted with the charging port. It is detachably fastened to the port to effectively prevent outdoor rain and dust from entering the interface and avoid short circuit damage.

[0009] Furthermore, the battery is a 14500 lithium battery with a capacity of 500mAh. It is electrically connected to the PCBA board via wires, and the battery is wrapped with a flame-retardant insulating sleeve to improve safety. In low-speed mode, it can be used continuously for 4 hours on a single charge, 2-3 hours in medium-speed mode, and 1-1.5 hours in high-speed mode, meeting the needs of outdoor use. At the same time, the PCBA board integrates overcharge, over-discharge, and overcurrent protection circuits. It automatically cuts off power when the battery voltage is below 3.0V to prevent over-discharge from damaging the battery. Charging stops when the voltage is above 4.2V to avoid safety hazards.

[0010] The beneficial effects of this utility model are: Improved scene adaptability: The bottom swivel connector is compatible with the umbrella stick of the sun umbrella, realizing the dual mode switching of "fixed use" and "handheld use", solving the pain point of "holding the umbrella stick in one hand and a fan in the other" when using an umbrella outdoors. It is especially suitable for scenarios such as park rest, open-air market, and outdoor tourism and leisure.

[0011] Optimized airflow flexibility: The fan assembly supports 0-180° rotation forward and backward, and the damping shaft ensures a fixed angle. Users can easily change the airflow direction without adjusting their hand position, covering more heat dissipation areas.

[0012] Balancing battery life and protection: The lithium battery meets the needs of outdoor use, and the Type-C charging port with a waterproof cover balances charging convenience with outdoor dust and water resistance, extending the product's lifespan.

[0013] Operation and feel upgrades: Three-speed fan adjustment adapts to different heat dissipation needs, and the silicone switch button and anti-slip connector design improve operating comfort and grip stability. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the exploded structure provided for an embodiment of the present utility model; Figure 3 A schematic diagram of the fan assembly provided in an embodiment of this utility model; Figure 4 A schematic diagram of the control components provided in an embodiment of this utility model.

[0015] The following are the labeling elements in the figure: 1. Fan assembly; 11. Fan front housing; 12. Fan blades; 13. Fan casing; 14. Fan rear housing; 15. T-shaped connector; 2. Housing assembly; 21. Front housing; 22. Rear housing; 23. Connector; 3. Battery; 4. Control assembly; 41. PCBA board; 42. Switch button; 43. Charging port; 44. Waterproof cover. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] The technical solution of this patent will be further described in detail below with reference to specific embodiments. Example

[0020] like Figures 1 to 4 As shown, the core lies in constructing a core structure of "straight handle integration + swivel connection + rotatable fan," breaking the functional limitations of traditional handheld fans. The housing component 2 is a straight handle shape. The front shell 21 and rear shell 22 are injection molded from ABS plastic, with a thickness of 2-2.5mm and a weight controlled at 50-60g, balancing structural strength and lightweight requirements. The two are fixed together with four M2.5 screws, and a 0.5mm thick silicone sealing ring is provided at the joint to improve internal sealing and prevent dust from entering and affecting electronic components.

[0021] The connector 23 is connected to the bottom of the housing assembly 2. The thread specification of its end is adapted to the umbrella rod interface of the mainstream sun umbrellas on the market, ensuring the connection stability when screwed with the umbrella rod. The surface of the connector 23 is knurled to form anti-slip texture with a spacing of 1mm. When used as a handheld device, it can increase the friction between the hand and the straight handle and prevent slipping due to sweat.

[0022] The fan assembly 1 is connected to the bottom of the housing assembly 2 via a T-shaped connector 15, and the rotational damping force is set to 6N. After testing, the fan assembly 1 can rotate smoothly from 0 to 180° around the T-shaped connector 15, and there is no self-offset phenomenon when it stops at any angle (such as when tilted at 30°, 90°, and 150°, it can be adjusted with an external force of less than 5N, and can maintain the angle stably after adjustment), which meets the needs of different air outlet directions.

[0023] In fan assembly 1, the fan body 13 is made of ABS material, with an inner diameter of 30mm and a length of 40mm. The drive motor is a micro DC motor with a rated voltage of 3.7V, a power of 2W, a speed range of 500-1200r / min, and a noise level of ≤45dB (at high speed), avoiding harsh noise during outdoor use. The fan blades 12 are 3-blade structures with a diameter of 45mm, made of ABS+glass fiber composite material (glass fiber content of 15%). After dynamic balancing testing, the radial runout during rotation is ≤0.1mm, reducing hand discomfort caused by vibration. The fan front shell 11 and fan rear shell 14 are respectively fastened to the front and rear ends of the fan body. The fan front shell 11 has honeycomb-shaped air inlet holes (hole diameter 2-3mm to prevent foreign objects from being drawn in), and the fan rear shell 14 has an annular air outlet grille with a grid tilt angle of 30°, which can guide the airflow to concentrate and blow out, improving heat dissipation efficiency.

[0024] In the control component 4, the PCBA board 41 measures 30mm × 20mm and is 1.6mm thick, integrating the main control chip, gear adjustment circuit, and protection circuit; the switch button 42 is a circular silicone button with a diameter of 8mm and a height of 3mm, embedded in the back shell 22 of the housing component 2 for easy thumb pressing operation; the charging port 43 is a Type-C female connector with a depth of 6mm, compatible with mainstream charging cables; the waterproof cover 44 is made of transparent silicone material, which fits the charging port 43 with an interference fit, and the waterproof rating can reach IP54 after being snapped together, which can resist short-term light rain or dust intrusion.

[0025] Battery 3 is one or more 14500 lithium batteries with a capacity of 500mAh and a voltage of 3.7V. It is wrapped with a flame-retardant PP insulating sleeve and soldered to PCBA board 41 through wires. The protection circuit of PCBA board 41 can: automatically cut off the charging circuit when the charging voltage exceeds 4.2V; trigger overcurrent protection when the discharge current exceeds 1A; and automatically shut down the fan output when the battery voltage is lower than 3.0V, effectively extending the battery life and avoiding safety risks.

[0026] The above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. A detachable and adjustable handheld fan, characterized in that: The device includes a fan assembly, a housing assembly, a battery, and a control assembly. The fan assembly is rotatably connected to the top of the housing assembly. The battery and the control assembly are disposed inside the housing assembly. The battery is electrically connected to the control assembly, and the control assembly is electrically connected to the fan assembly to control the speed and on / off state of the fan assembly. The housing assembly includes a front shell, a rear shell, and a connector. The front shell and the rear shell are fixedly connected. The connector is located at the bottom of the housing assembly. The bottom of the connector has a threaded structure with threads for detachable connection with the center rod of the sunshade.

2. The detachable and adjustable handheld fan according to claim 1, characterized in that: The housing assembly is in the shape of a straight handle.

3. A detachable and adjustable handheld fan according to claim 2, characterized in that: The control component includes a PCBA board, a switch button, a charging port, and a waterproof cover. The PCBA board is installed inside the housing assembly. The PCBA board is provided with the switch button, the charging port, and the waterproof cover. The waterproof cover is detachably connected to the charging port and is used to prevent water and dust from entering the charging port and causing damage.

4. A detachable and adjustable handheld fan according to claim 1, characterized in that: The fan assembly includes a front fan housing, fan blades, a fan cylinder, a rear fan housing, and a T-shaped connector. The fan cylinder is rotatably connected to the housing assembly via the T-shaped connector. The fan blades are connected inside the fan cylinder. The front fan housing and the rear fan housing are respectively provided on the front and rear sides of the fan cylinder.

5. A detachable and adjustable handheld fan according to claim 4, characterized in that: The fan assembly can rotate 0-180° forward and backward around the housing assembly.

6. A detachable and adjustable handheld fan according to claim 5, characterized in that: The control component can control the three fan speeds of the fan assembly.

Images