A type of electric fan blade

Abstract

This utility model discloses an electric fan blade, which includes a fan blade body and a magnetic ring. The fan blade body is an integral structure, comprising a hub and several blades evenly arranged circumferentially along the hub. The fan blade body has a cavity, within which a shaft is located. The cavity has an open end, and the magnetic ring is fixed to the open end of the cavity so that the magnetic ring and the fan blade body rotate together. It has advantages such as simple structure, compact fit, and reasonable design; therefore, it is a product with superior technical and economic performance.

Description

[Technical Field] This utility model mainly relates to an electric fan blade. [Background Technology] Traditional fans, such as table fans and floor fans, are common air circulation devices. Their core working principle is usually to drive a limited number of fan blades (e.g., 3, 5, or 7 blades) to rotate through a motor, cutting the air to generate a directional airflow. However, this conventional design has several inherent flaws that affect the user experience.

[0001] First, due to the limited number of fan blades, each blade must bear a significant aerodynamic load to achieve the set airflow requirements. This typically results in wider blades and higher rotational speeds. The high-speed rotation of these wide blades cuts the air into distinct, discontinuous "wind clusters" or "pulsating" airflows. Users experience this strong, slapping, and intermittent wind, which can easily cause discomfort and poor comfort over time, far removed from the gentle, continuous characteristics of natural wind.

[0002] Secondly, traditional drive methods mostly employ a contact-type mechanical transmission structure where the motor shaft and fan blades are directly connected. This structure is prone to generating significant mechanical noise and vibration during high-speed operation, not only disturbing the environment but also affecting energy efficiency and long-term component stability due to inherent friction and losses. Furthermore, conventional motors have limited precision in speed regulation, making it difficult to achieve precise control over the output airflow characteristics.

[0003] Furthermore, the fan head angle adjustment mechanisms of most traditional fans are relatively simple or inconvenient to operate, failing to achieve quick and flexible multi-angle positioning, thus limiting the free adjustment of the airflow direction and making it difficult to meet the diverse air delivery needs of users. In view of this, we propose a fan blade structure to improve the quality of the output airflow, making it closer to the feeling of natural wind, while effectively reducing operating noise and vibration, and improving energy efficiency and control precision. [Utility Model Content] To solve at least one of the above problems, this utility model proposes a new structural solution. The fan blade of this electric fan adopts the following technical solution: An electric fan blade includes a fan blade body and a magnetic ring. The fan blade body is an integral structure, including a hub and several blades evenly arranged around the hub. The fan blade body has a cavity, and a shaft core is provided inside the cavity. The cavity has an open end, and the magnetic ring is fixed to the open end of the cavity so that the magnetic ring and the fan blade body rotate together.

[0004] Preferably, the inner diameter of the magnetic ring is the same as the diameter of the cavity, and the outer diameter of the magnetic ring is smaller than the outer diameter of the hub.

[0005] Preferably, the fan blade body is installed inside the fan housing, which includes a fan head and a handle. The fan head extends into an extension, and the handle is hinged to the extension so that the handle and the fan head fold relative to each other.

[0006] Preferably, the fan head has a wing cavity, and a shaft and a coil assembly are disposed inside the wing cavity, with the shaft and coil assembly respectively located on both sides of the fan head.

[0007] Preferably, the wing cavity is provided with a insertion shaft, the insertion shaft has an insertion hole, and the insertion shaft is connected to the insertion hole to install the fan body in the wing cavity.

[0008] Preferably, the diameter of the coil assembly is smaller than the diameter of the cavity.

[0009] The beneficial effects of this utility model compared with the prior art are: This patented design significantly increases the number of fan blades to 13, reducing the load on each blade and narrowing its width, thus enabling operation at a lower speed while achieving the same airflow. This design effectively cuts the airflow more finely and continuously, eliminating the pulsating "wind clusters" and slapping sensation produced by traditional fans. The output airflow is smooth and gentle, significantly improving user comfort, especially suitable for prolonged direct blowing. Simultaneously, the fan blade body incorporates a built-in magnetic ring, forming a non-contact drive with the external coil assembly. This compact and rational structure not only reduces operating noise and vibration but also achieves precise speed control through magnetic field adjustment. Combined with the hinged design of the fan head and handle, it further optimizes the flexible adjustment of the airflow angle. Overall, it achieves a comprehensive benefit of closer to natural wind feel, low energy consumption, high stability, and user-friendly operation. It boasts advantages such as simple structure, compact fit, and rational design; therefore, it is a product with superior performance in both technology and economy. [Attached Image Description] Figure 1 A schematic diagram of the fan housing in a preferred embodiment of this utility model; Figure 2 This is an exploded view of the fan housing in a preferred embodiment of the present invention. Figure 3 This is a schematic diagram of the fan blade structure in a preferred embodiment of the present invention.

Detailed Implementation Methods

[0010] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0011] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0012] The preferred embodiment provided by this utility model is as follows: Figures 1-3 As shown, an electric fan blade includes a blade body 1 and a magnetic ring 2. The blade body 1 is an integral structure, comprising a hub 2 and several blades 3 evenly arranged circumferentially along the hub 2. Traditional fans have few blades 3 (e.g., 3-5 blades), each blade 3 needs to be very wide, requiring high rotational speed to push a large amount of air. This cuts the air, creating large, discontinuous "wind clusters," which feel noticeably "slapping" or "impacting" on the person, making it uncomfortable. Therefore, in this design, the number of blades 3 is 13, increasing the number of blades 3. This reduces the load on each blade 3, allowing it to be made narrower. Under the same airflow, the fan can operate at a lower speed. More blades 3 mean that the air is "cut" finer and more frequently, resulting in a more continuous and stable airflow. This wind does not have a noticeable pulsating sensation, but rather feels like a gentle natural breeze, making it very comfortable, especially suitable for prolonged direct airflow.

[0013] The fan blade body 1 is installed inside the fan housing 4. The fan housing 4 includes a fan head 5 and a handle 6. The fan head 5 extends into an extension portion 51, and the handle 6 is hinged to the extension portion 51 so that the handle 6 and the fan head 5 fold relative to each other, thereby changing the airflow angle. The fan head 5 has a wing cavity 52, in which a shaft 53 and a coil assembly 4 are provided. The coil assembly that generates the magnetic field is a conventional product, and its specific structure will not be described in detail here. The shaft 53 and the coil assembly 4 are respectively located on both sides of the fan head 5. The fan blade body 1 is driven to rotate within the wing cavity 52 by the coil assembly 4.

[0014] The fan blade body 1 has a cavity 11, and a shaft core 12 is provided inside the cavity 11. The cavity 11 has an open end, and a magnetic ring 2 is fixed to the open end of the cavity 11. The fixing method can be welding or adhesive bonding, so that the magnetic ring 2 and the fan blade body 1 can rotate together. A shaft 53 is provided inside the wing cavity 52. ​​The shaft 53 has a hole 54. The shaft 53 is connected to the hole 54 to install the fan blade body 1 inside the wing cavity 52. ​​The fan blade body 1 rotates on the shaft 53. The inner diameter of the magnetic ring 2 is the same as the diameter of the cavity 11, and the outer diameter of the magnetic ring 2 is smaller than the outer diameter of the hub 2. The magnetic ring 2 is composed of several magnetic poles arranged in a row, and the polarities of two adjacent magnetic poles are opposite.

[0015] Operation Flow: The coil assembly 4 is sleeved on the insert shaft 53. The circuit board is located inside the extension part 51. An opening 55 is provided between the extension part 51 and the fan head 5 to allow the circuit board's lines to extend into the fan head 5 and connect to the coil assembly 4. The shaft core 12 of the fan blade body 1 is inserted into the insertion hole 54 of the insert shaft 53. The thickness of the fan blade body 1 corresponds to the thickness of the fan head 5, so that the fan blade body 1, due to the thickness limitation of the fan head 5, will maintain the connection between the shaft core 12 and the insert shaft 53. The diameter of the coil assembly 4 is smaller than the diameter of the cavity 11. After the fan blade body 1 is installed on the insert shaft 53, the coil assembly 4 will enter the cavity 11. The alternating magnetic field generated by the coil, in conjunction with the magnetic ring 2 of the fan blade body 1, can drive the fan blade body 1 to rotate. The rotation speed of the fan blade body 1 can be achieved by adjusting the rate of change of the alternating magnetic field.

[0016] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0017] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A fan blade for an electric fan, characterized in that: It includes a fan blade body and a magnetic ring. The fan blade body is an integral structure, including a hub and several blades evenly arranged around the hub. The fan blade body has a cavity, and a shaft core is located inside the cavity. The cavity has an open end, and the magnetic ring is fixed to the open end of the cavity so that the magnetic ring and the fan blade body rotate together.

2. The fan blade according to claim 1, characterized in that: The inner diameter of the magnetic ring is the same as the diameter of the cavity, while the outer diameter of the magnetic ring is smaller than the outer diameter of the hub.

3. The fan blade according to claim 1, characterized in that: The fan blade body is installed inside the fan housing, which includes a fan head and a handle. The fan head extends into an extension, and the handle is hinged to the extension so that the handle and the fan head fold relative to each other.

4. The fan blade according to claim 3, characterized in that: The fan head has a wing cavity, inside which are installed a shaft and a coil assembly, which are respectively located on both sides of the fan head.

5. A fan blade according to claim 4, characterized in that: The wing cavity is equipped with a shaft with a socket, and the shaft is connected to the socket to install the fan body inside the wing cavity.

6. A fan blade according to claim 5, characterized in that: The diameter of the coil assembly is smaller than the diameter of the cavity.

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