Fan device

Abstract

The application discloses a fan device, which comprises a fan body, a first supporting frame and a second supporting frame. The first supporting frame is detachably connected to the fan body and is provided with a containing space. The second supporting frame is movably connected to the fan body and is selectively in a storage state or a supporting state. The fan device has a first use state and a second use state. When the fan device is in the first use state, the second supporting frame is in the storage state and is contained in the containing space, and the fan body can be placed on a plane through the first supporting frame. When the fan device is in the second use state, the first supporting frame is separated from the fan body, the second supporting frame is in the supporting state, and the fan body can be placed on a non-plane through the second supporting frame. Thus, the fan device can be stably supported on a plane and self-adaptively supported on a non-plane.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a fan device. Background Technology

[0002] Currently, household fans typically use a fixed base or a single pole as their support structure, which is only suitable for flat surfaces such as level ground or desktops. When users need to use the fan on slopes, steps, beds, or other non-level surfaces, traditional support structures lack self-adjustment capabilities and are difficult to place stably, easily tipping over or wobbling, limiting the flexibility of the fan's use. Therefore, there is an urgent need for a fan device that can provide both stable support on flat surfaces and adaptive support on non-flat surfaces. Summary of the Invention

[0003] This application provides a fan device that can solve at least one of the above-mentioned technical problems.

[0004] This application provides a fan device, including: Fan body; The first support frame is detachably connected to the fan body and has a receiving space. The second support frame is movably connected to the fan body so that it can be selectively in a retracted state or a supported state. The fan device has a first usage state and a second usage state. When the fan device is in the first usage state, the second support frame is in a storage state and is stored in the accommodating space. The fan body can be placed on a flat surface through the first support frame. When the fan device is in the second usage state, the first support frame is separated from the fan body, the second support frame is in a supporting state, and the fan body can be placed on a non-flat surface through the second support frame.

[0005] In some embodiments, the second support frame includes a plurality of support members, each of which is rotatably connected to the fan body.

[0006] In some implementations, the support is arranged in a spiral shape.

[0007] In some implementations, when the fan device is in the first use state, the second support frame is in the storage state, and the overall outer diameter of the multiple support members is smaller than the inner diameter of the accommodating space.

[0008] In some embodiments, the support includes a connecting section and a spiral support section connected together, with the end of the connecting section away from the spiral support section being spirally arranged.

[0009] In some embodiments, the fan body is provided with a connecting end, which is threadedly connected to the first support frame, and the end of the connecting end is provided with multiple connecting protrusions along its axial direction. The multiple connecting protrusions and multiple connecting segments are arranged alternately along the circumference of the connecting end, and the connecting segments are rotatably connected between two adjacent connecting protrusions.

[0010] In some embodiments, the fan device further includes multiple rotating shafts, each corresponding to a connecting segment, and each connecting segment being rotatably connected to two adjacent connecting protrusions via the corresponding rotating shaft.

[0011] In some implementations, each shaft passes through two corresponding connecting protrusions.

[0012] In some implementations, the second support frame is threadedly connected to the fan body.

[0013] In some embodiments, the first support frame includes a column and a base, the column having a receiving space, and when the fan device is in the first use state, the fan body, the column, and the base are sequentially threaded together.

[0014] The fan device provided in this application includes a fan body, a first support frame, and a second support frame. The first support frame is detachably connected to the fan body and has a receiving space. The second support frame is movably connected to the fan body to selectively be in a retracted state or a supported state. The fan device has a first usage state and a second usage state. When the fan device is in the first usage state, the second support frame is in a retracted state and is stored in the receiving space, and the fan body can be placed on a flat surface through the first support frame. When the fan device is in the second usage state, the first support frame is separated from the fan body, the second support frame is in a supported state, and the fan body can be placed on a non-flat surface through the second support frame.

[0015] Thus, the fan device of this application, by setting a detachable first support frame and a movable second support frame, overcomes the limitation of traditional fans that can only be used on horizontal surfaces. In the first usage state, the first support frame enables stable placement on a flat surface; in the second usage state, by switching to the second support frame, the fan body can be stably placed on non-planar surfaces (such as slopes, steps, beds, etc.). This dual-mode support structure directly solves the problem of lack of adaptive adjustment capability mentioned in the prior art, greatly expanding the application scenarios of the fan.

[0016] Furthermore, the first support frame has a storage space, and the second support frame can be movably connected and selectively stored. When the fan is in its primary use state or during transport, the second support frame can be completely stored within the storage space of the first support frame. This design not only avoids the risk of bumps or accidental contact caused by the exposed second support frame, but also effectively reduces the overall size of the device, allowing the fan to maintain its multi-functionality while possessing a compact structure, making it easy for users to store and move.

[0017] Furthermore, the first support frame features a detachable connection, allowing users to quickly switch between "planar mode" and "non-planar mode" depending on the actual usage environment. When non-planar use is required, simply detach the first support frame and unfold the second support frame; when returning to planar use, simply reinstall the first support frame and store the second support frame. This design ensures structural independence and stability in different support states while also guaranteeing a simple and efficient state switching process, thus enhancing the user experience. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional schematic diagram of a fan device provided in an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the structure of a fan device provided in another embodiment of this application.

[0021] Explanation of icon numbers: 10. Fan device; 100. Fan body; 110. Connecting end; 120. Connecting protrusion; 200. First support frame; 201. Accommodation space; 210. Column; 220. Base; 300. Second support frame; 310. Support component; 311. Connecting section; 312. Spiral support section; The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0023] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0024] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0025] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Please see Figure 1 and Figure 2 This embodiment provides a fan device 10, which includes a fan body 100, a first support frame 200, and a second support frame 300. The fan body 100, as the core functional component, integrates a motor and fan blade assembly to generate airflow. The first support frame 200 is detachably connected to the fan body 100 and has a receiving space 201. The second support frame 300 is movably connected to the fan body 100, selectively positioned in a stowed or supported state. Specifically, this detachable connection design aims to achieve modular assembly and functional switching, and its implementation is not limited to the threaded connection shown in the figure. For example, in an alternative embodiment, the first support frame 200 and the fan body 100 can be connected by an elastic snap-fit, which can be quickly separated by pressing a release button, suitable for scenarios requiring extreme portability. In another alternative embodiment, they can also be connected magnetically, utilizing the adsorption force of a built-in permanent magnet to achieve automatic centering and locking, improving assembly feel and efficiency. It should be understood that regardless of the connection method used, as long as a stable connection and convenient separation between the two can be achieved, it falls within the scope of protection of this application.

[0027] Regarding the construction of the receiving space 201, in this embodiment, the first support frame 200 has a hollow tubular structure, and its internal cavity constitutes the receiving space 201, which is used to accommodate the second support frame 300 in a specific state. However, the shape of the receiving space 201 should not be understood as limited to a closed hollow tube. For example, in some variant designs, the receiving space 201 can be an open groove formed on the side wall of the first support frame 200, which, together with an external cover or elastic strap, achieves the limiting and storage of the second support frame 300; or, the receiving space 201 can also be designed as a sandwich structure between two shells, or even an expandable capsule made of flexible material, which can be folded and compressed to reduce volume when not in use, and expanded to form a protective chamber when in use. These diverse receiving forms can all provide the necessary shelter and protection for the second support frame 300, while adapting to different appearance requirements.

[0028] The fan device 10 has a first usage state and a second usage state. When the fan device 10 is in the first usage state, the second support frame 300 is in a retracted state, stored in the receiving space 201, and the fan body 100 can be placed on a flat surface via the first support frame 200. As shown, in this state, the second support frame 300 is completely hidden inside the first support frame 200, and the whole machine presents a neat vertical shape. At this time, the gravity load of the fan body 100 is mainly transferred vertically to the ground or tabletop or other flat support surface through the first support frame 200. The force transmission path is single and stable, the center of gravity is low, and it can effectively prevent tipping. At the same time, since the second support frame 300 is wrapped inside the first support frame 200, it not only avoids the risk of bumping or knocking to the user from exposed parts, but also prevents dust accumulation or accidental damage, ensuring the product's appearance and service life.

[0029] When the fan device 10 is in its second operating state, the first support frame 200 is separated from the fan body 100, and the second support frame 300 is in a supporting state. The fan body 100 can be positioned on a non-planar surface via the second support frame 300. As shown, the user first removes the first support frame 200 from the fan body 100, and then removes the second support frame 300 from the receiving space 201 and adjusts it to a supporting posture. In this state, the force transmission path undergoes a fundamental change: the weight of the fan body 100 no longer relies on a single column 210 for transmission, but is distributed to the contact surface through multiple support points of the second support frame 300. Because the second support frame 300 has degrees of freedom of movement, each support point can autonomously adjust its position and angle according to the local topography of non-planar surfaces (such as slopes, steps, beds, etc.), thereby forming a multi-point adaptive support system, effectively overcoming the defects of traditional rigid bases 220 that are prone to wobbling and difficult to level on irregular surfaces.

[0030] From a user operation logic perspective, the switching process between the two states is simple and intuitive. When switching from planar mode to non-planar mode, the user only needs to perform two actions: "disassembling the first support frame 200" and "unfolding the second support frame 300"; conversely, when reverting to planar mode, the user performs two actions: "folding the second support frame 300" and "installing the first support frame 200". The entire process requires no additional tools and does not involve complex mechanical linkages or electronic controls, greatly reducing the learning cost and the risk of misoperation. This embodiment, through the aforementioned dual-state switching core architecture, establishes the basic adaptability of the fan device 10 under different usage scenarios, providing a reference benchmark and higher-level conceptual support for more refined structural optimization in subsequent embodiments.

[0031] In some embodiments, the second support frame 300 includes multiple support members 310, each of which is rotatably connected to the fan body 100. This design transforms what would otherwise be a single rigid support structure into a flexible support system composed of multiple independent moving units, with the core objective of solving the self-adaptive challenge of non-planar support. Specifically, the reason for using multiple support members 310 instead of a single support member 310 is that when the fan device 10 is placed in a non-planar environment such as steps, slopes, or uneven surfaces, a single rigid support can only form a single point or line contact, making it prone to tipping or swaying due to center of gravity shift. Multiple support members 310, on the other hand, can form a distributed support network, with each support member 310 independently adjusting its posture according to the local geometric characteristics of the contact surface, thereby constructing a multi-point adaptive support system that effectively distributes the load and suppresses overturning moments, significantly improving the stability and safety of the equipment in complex terrain.

[0032] Regarding the rotatable connection between the support member 310 and the fan body 100, its specific mechanical implementation is not limited to a single form, as long as it enables the angle adjustment function of the support member 310 relative to the fan body 100. For example, in a preferred embodiment, the rotatable connection can adopt a structure of cylindrical pin and shaft hole mating. Specifically, a radially penetrating mounting hole is provided at the connecting end 110 of the fan body 100, and a corresponding through hole is provided at the connecting end 110 of the support member 310. By passing a cylindrical pin made of metal or high-strength plastic sequentially through the mounting hole and the through hole, the support member 310 can achieve fixed-axis rotation around the pin axis. The advantages of this method are that the rotation trajectory is determined, the machining accuracy is high, and the assembly process is mature, making it suitable for mass production. At the same time, the rotational damping can be precisely controlled by adding knurling to the pin surface, applying damping grease, or embedding an elastic bushing in the shaft hole, preventing the support member 310 from sag spontaneously due to gravity when not in operation. However, the cylindrical pin mating only provides a single degree of rotational freedom, and its adaptability to lateral tilting non-planar surfaces is relatively limited.

[0033] As an alternative implementation, the rotatable connection can also employ a structure with a spherical hinge and a socket. Specifically, a ball head is integrally formed or inlaid at the connecting end 110 of the support member 310, while a spherical socket matching the ball head is provided at the connecting end 110 of the fan body 100. The ball head is confined and enclosed within the socket and can deflect in any direction. Compared to the cylindrical pin solution, the spherical hinge provides three degrees of rotational freedom, allowing the support member 310 to not only swing back and forth to adapt to longitudinal slopes, but also deflect left and right to compensate for lateral tilt, and even perform a certain degree of torsional adjustment, thereby achieving all-round fit to three-dimensional irregular surfaces. In terms of assembly, spherical hinges are usually assembled using press-fit or snap-fit ​​methods. Although the requirements for fit tolerances are high, once assembled, they possess self-lubricating properties and are not prone to abnormal noise during long-term use. In addition, by setting elastic gaskets on the inner wall of the socket or utilizing the friction generated by the interference fit, a stepless suspension damping effect can also be achieved, ensuring that the support member 310 remains stationary at any angle.

[0034] In this embodiment, multiple support members 310 are evenly distributed circumferentially along the bottom of the fan body 100, extending outward in a radial pattern. This circumferentially distributed design not only ensures that each support member 310 is subjected to balanced force in the unfolded state, avoiding the shift of the overall center of gravity caused by eccentric arrangement, but also allows each support member 310 to fit tightly against the inner wall of the accommodating space 201 in the stored state, maximizing the utilization of the internal volume. It should be understood that although the figure shows the support members 310 distributed in an octopus-like manner, in other embodiments, the number of support members 310 can also be adjusted according to the actual load-bearing requirements and storage space limitations, such as setting it to three, four, or six, as long as the basic mechanical requirements of multi-point support are met. This embodiment, through the above-mentioned rotatable connection structure of multiple support members 310, lays a solid kinematic foundation for the introduction of advanced features such as spiral shape and segmented design in subsequent embodiments, and also establishes the core adaptability of the second support frame 300 in non-planar support scenarios.

[0035] In some embodiments, the support member 310 is arranged in a spiral shape. This geometric feature is not merely a matter of aesthetic design, but a functional construction determined by the dual requirements of compact storage and adaptable support. Specifically, the spiral structure, through its unique continuous curvature, exhibits differentiated mechanical behaviors in two distinct usage states: In the stowed state, the tangent direction of the spiral is approximately parallel to the axial direction of the first support frame 200, allowing multiple support members 310 to fit tightly against the inner wall of the accommodating space 201 along the axial direction, transforming the originally radially diverging legs into a compact axially extending bundle, thereby significantly reducing the overall radial dimension and allowing the fan device 10 to maintain a slender and regular vertical appearance in the first usage state; In the supported state, when the support member 310 is subjected to vertical loads from the fan body 100 and reaction forces from non-planar contact surfaces, the spiral curvature provides a natural elastic deformation margin, allowing the support member 310 to generate controllable bending deformation in the pressure area to adapt to local concavities and convexities, while maintaining sufficient vertical stiffness in the unpressured area to prevent excessive collapse, thus achieving flexible fit and stable load bearing on irregular surfaces.

[0036] To better understand the necessity of the spiral configuration, it can be compared with other common support structures. While a traditional straight rod support 310 offers high axial compressive strength in its supported state, its straight shape cannot be altered during storage. This necessitates either a storage space 201 with a depth comparable to the support length or a complex folding hinge mechanism to shorten the storage length, increasing both volume and weight, and introducing easily worn moving parts. Furthermore, when supporting a non-planar surface, the rigid straight rod can only make contact at its endpoints, unlike the spiral structure which can increase the effective contact area through deformation, making it prone to sliding or overturning. On the other hand, while a corrugated tubular structure possesses excellent axial compression capacity and some bending flexibility, its torsional stiffness is severely insufficient. Under eccentric loads or lateral wind forces, it is prone to torsional instability, causing the fan body 100 to sway or even tip over. In contrast, the spiral structure, due to the continuous spatial distribution of its cross-sectional moment of inertia, provides far superior torsional stability compared to a corrugated tubular structure while maintaining bending flexibility, ensuring the reliability of the support state.

[0037] The spiral shape of the support member 310 in its retracted state shows that the spiral coils of each support member 310 are arranged longitudinally along the inner cavity of the first support frame 200, with small gaps between them to avoid frictional interference, while making full use of the cylindrical volume of the tubular receiving space 201. It should be understood that although the figure shows a cylindrical spiral with equal pitch, in other embodiments, the spiral shape of the support member 310 can be adjusted according to specific needs. For example, in one optional embodiment, the support member 310 can adopt a variable pitch helical design, that is, the pitch is smaller and the number of turns is denser near the connection end 110 of the fan body 100 to enhance the rotational flexibility and stress dispersion ability at the root, while the pitch is larger and the number of turns is sparser further away from the connection end 110 to improve the support stiffness and ground contact stability at the end. In another optional embodiment, the support member 310 can also adopt a conical helix, that is, the helix radius gradually decreases from the root to the end. This shape can better match the accommodating space 201 when stored, and at the same time form an arch-like force-bearing structure when supported, further improving the vertical load-bearing efficiency. Regardless of the specific helical parameters used, as long as it presents a helical geometric feature and thereby obtains the dual advantages of storage and support, it falls within the protection scope of this embodiment.

[0038] Furthermore, the specific molding process of the spiral support 310 is also closely related to its performance. For example, in a preferred embodiment, the support 310 can be formed by winding spring steel wire and then heat-treating it. The spiral obtained in this way has excellent elastic limit and fatigue life, making it suitable for long-term repeated bending applications. In another embodiment, the support 310 can also be formed by injection molding of high-strength engineering plastic, directly forming a spiral cavity in the mold. Although the elastic modulus of this method is lower than that of metal, the stiffness can be compensated by adjusting the wall thickness and pitch. It also has advantages such as low cost, light weight, and corrosion resistance, making it particularly suitable for portable fan devices 10. This embodiment, through the design of the spiral geometric configuration described above, not only solves the problem of efficient storage of multiple support components 310 in a limited space, but also endows the second support frame 300 with unique adaptive support capabilities in non-planar environments. This is the core innovation that distinguishes it from conventional folding brackets, laying the geometric and mechanical foundation for the introduction of refined features such as segmented structure and the arrangement of connecting protrusions 120 in subsequent embodiments.

[0039] In one implementation, when the fan device 10 is in its first usage state, the second support frame 300 is in a retracted state, and the overall outer diameter of the multiple support members 310 is smaller than the inner diameter of the accommodating space 201 of the first support frame 200. This dimensional relationship is not a simple design margin selection, but a key parameter boundary to ensure the reliable realization of the concealed storage function. Specifically, the "overall outer diameter" referred to here is the diameter of the smallest enclosing cylinder formed by the outer contours of the multiple support members 310 when they are fully retracted to their retracted posture, that is, the diameter of the largest circumscribed circle formed by the projections of the outermost points of all support members 310 onto a plane perpendicular to the axis. This measurement method eliminates instantaneous protrusions caused by local warping or assembly deviations of individual support members 310, and truly reflects the effective radial space occupied by the second support frame 300 in the retracted state. Only when the overall outer diameter is strictly smaller than the inner diameter of the accommodating space 201 can it be guaranteed that the support members 310 will not interfere with or get stuck against the inner wall during insertion or removal, and that they are completely covered by the outer shell of the first support frame 200 when statically stored.

[0040] The engineering significance of this dimensional fit is mainly reflected in two aspects. First, it avoids damage from exposed impacts. If the overall outer diameter of the support member 310 is equal to or greater than the inner diameter of the accommodating space 201, then in the folded state, some structures will inevitably protrude from the surface of the first support frame 200. During transportation, handling, or daily use, these structures are easily deformed and damaged by external impacts. This is especially true for the spiral support member 310, which has elastic deformation capabilities; once the end is damaged, it will directly affect the subsequent unfolding posture and support stability. Second, it ensures a clean appearance and user experience. When the support member 310 is completely concealed inside the accommodating space 201, the fan device 10 presents a continuous and smooth vertical shape in the first use state, without any abrupt seams or exposed components. This not only improves the aesthetic quality of the product but also avoids the inconvenience caused to users when wiping and cleaning due to touching gaps. This integrated visual and tactile experience is an important differentiating feature from traditional external folding brackets.

[0041] In practical engineering design, the difference between the overall outer diameter and the inner diameter of the receiving space 201 is neither necessarily better the smaller it is, nor better the larger it is. Instead, the appropriate fit type needs to be selected based on specific usage requirements. For example, in a preferred embodiment, a clearance fit can be used, where the overall outer diameter of the multiple support members 310 is approximately 1.0 mm smaller than the inner diameter of the receiving space 201, with a single-sided clearance controlled at around 0.5 mm. This larger clearance design significantly reduces the assembly precision requirements, allowing users to smoothly push or pull the second support frame 300 into or out of the receiving space 201 with minimal resistance, making it particularly suitable for portable scenarios requiring frequent switching of usage states. Simultaneously, the ample clearance provides tolerance for dust or small foreign objects that may adhere to the surface of the support members 310, preventing jamming due to dirt accumulation. However, an excessively large clearance may also cause radial wobbling of the support members 310 in the retracted state, resulting in abnormal noise when moving the fan device 10. Therefore, in another optional embodiment, a transition fit can be used, where the single-sided clearance is reduced to approximately 0.1 mm. While this tight fit places higher demands on machining tolerances and coaxiality, it effectively eliminates the free movement of the support member 310 within the accommodating space 201, ensuring the entire unit remains quiet and stable during handling or operation. This makes it more suitable for home use with fixed placement where a high level of quality and quietness is required. It should be understood that the aforementioned 0.5mm and 0.1mm are merely exemplary values. The actual gap size can be adjusted based on factors such as the material hardness of the support member 310, surface treatment process, and the length of the accommodating space 201. As long as the basic premise of "the overall outer diameter being smaller than the inner diameter" is met, it falls within the protection scope of this embodiment.

[0042] Furthermore, to ensure the consistency and reliability of this dimensional fit in mass production, a reasonable tolerance zone must be selected. Generally, the inner diameter of the accommodating space 201 should adopt an H7 or H8 grade hole-basis tolerance to ensure the stability of the inner wall dimensions; while the outer diameter of the envelope composed of multiple support components 310 should adopt an f7 or g6 grade shaft-basis tolerance, allowing it to deviate slightly downwards, thus naturally forming a positive clearance. For injection-molded plastic support components 310, the influence of draft angle and shrinkage rate on the actual outer diameter should also be considered, and if necessary, the dimensional requirements can be met through mold modification or post-processing shaping.

[0043] In one implementation, the support member 310 includes a connecting section 311 and a spiral support section 312 connected together, with the end of the connecting section 311 furthest from the spiral support section 312 arranged in a spiral configuration. This segmented structural design is not a simple geometric division, but a mechanical performance reconstruction of the support member 310 based on the concept of functional decoupling. Specifically, although the traditional integral spiral support member 310 has both storage and support functions, it often faces a dilemma in actual use: if a thinner wire diameter or a smaller pitch is used to ensure rotational flexibility, the vertical load-bearing stiffness of the support section is insufficient, making it prone to excessive bending or even plastic deformation; conversely, if the wire diameter or pitch is increased to meet load-bearing requirements, the rotational resistance of the connecting end 110 increases significantly, and stress concentration during repeated deflection can easily lead to root fatigue fracture. This embodiment effectively solves the above contradiction by dividing the support member 310 into two functionally distinct sections. The end of the connecting section 311 furthest from the spiral support section 312 is spirally configured, and this spiral end constitutes a natural flexible hinge area. When the support component 310 needs to adapt to non-planar terrain and undergoes angular deflection, the deformation is mainly concentrated on this small segment of the helical structure. The torsional and bending elasticity of the helical wire itself absorbs the angular displacement, thus avoiding the direct bending moment impact on the mounting position of the fan body 100 from the rigid connection point. This ensures smooth multi-angle adjustment and significantly reduces the risk of damage to the main structure. Meanwhile, the helical support segment 312 can be independently optimized for load-bearing requirements, such as using larger wire diameters, denser pitches, or higher modulus materials. This ensures sufficient vertical stiffness and anti-instability capability when bearing the weight of the fan body 100 and external disturbances, without compromising rotational flexibility. This segmented collaborative mechanism enables the support component 310 to simultaneously possess highly sensitive adaptive rotation capability and highly reliable static load-bearing performance, significantly improving the adaptation accuracy and safety margin in non-planar support scenarios.

[0044] Regarding the specific implementation of the connecting section 311 and the spiral support section 312, different technical paths can be selected based on manufacturing processes and cost objectives. For example, in a preferred one-piece molding embodiment, the support member 310 can be manufactured integrally through injection molding. In this case, although the connecting section 311 and the spiral support section 312 are made of the same material, their geometric parameters are differentiated through mold design. Specifically, the spiral portion of the connecting section 311 can be set to a smaller pitch and fewer turns (e.g., 1.5 to 2 turns), and the wire diameter can be slightly smaller than that of the spiral support section 312, thereby forming a low-stiffness flexible hinge; while the spiral support section 312 maintains a larger pitch and a complete number of turns to provide stable support force. The advantages of this variable-parameter one-piece molding are the absence of assembly seams, high production efficiency, and the smooth gradient surface that can be directly formed in the transition area between the two sections through the mold, effectively alleviating stress concentration. As an alternative modular assembly implementation, the connecting section 311 can be an independent helical insert made of metal spring steel wire, while the helical support section 312 is a high-strength engineering plastic part. The two are fixedly connected by methods such as interference fit, hot melt riveting, or threaded connection. In this solution, the metal connecting section 311, with its excellent elastic limit and fatigue life, can withstand hundreds of thousands of repeated bends without failure, making it particularly suitable for high-frequency adjustment applications; while the plastic helical support section 312 balances lightweight and low cost. Regardless of the implementation method, the transition area between the connecting section 311 and the helical support section 312 is a mechanically weak point, requiring specialized stress relief measures. For example, a rounded chamfer or tapered transition section can be set at the junction of the two sections to avoid stress peaks caused by abrupt changes in cross-section; or a fiber reinforcement layer can be embedded in the transition area, and the wall thickness can be locally increased to improve shear and torsional resistance. Furthermore, for the modular assembly scheme, elastic adhesive can be applied or buffer pads can be installed at the connection interface to further distribute alternating loads and prevent loosening or abnormal noise after long-term use. This embodiment, through the aforementioned segmented support member 310 structure, not only achieves a decoupled design between rotational freedom and support stiffness, but also provides the necessary structural foundation and mechanical interface for the introduction of refined features such as the arrangement of connecting protrusions 120 and the integration of rotating shafts in subsequent embodiments.

[0045] In one implementation, the fan body 100 is provided with a connecting end 110, which is threadedly connected to the first support frame 200. The end of the connecting end 110 has multiple connecting protrusions 120 along its axial direction. The multiple connecting protrusions 120 and multiple connecting segments 311 are arranged alternately along the circumference of the connecting end 110. The connecting segments 311 are rotatably connected between adjacent connecting protrusions 120. The core of this structural design lies in solving the engineering challenge of simultaneously integrating a threaded fastening interface and a multi-point rotating hinge within a limited area at the bottom of the fan body 100 through a space reuse strategy. Specifically, in traditional designs, if the threaded connection surface and the rotating mounting position are arranged in layers or radially staggered, it often results in the axial dimension of the connection end 110 being too long or the radial diameter being too large, thereby increasing the overall size and weight of the machine. However, the circumferential alternating arrangement method adopted in this embodiment allows the thread profile area used to lock the first support frame 200 and the hinge area used to install the connecting section 311 of the second support frame 300 to coexist in the same axial section. That is, while the connecting protrusion 120 serves as a hinge support, its root and side still retain a complete thread profile for the first support frame 200 to be screwed in, thereby achieving a highly compact structure without sacrificing the connection strength.

[0046] This alternating arrangement also brings significant advantages in coaxiality and dynamic balance. Since the multiple connecting protrusions 120 and multiple connecting segments 311 are evenly spaced along the circumference, each support member 310 naturally forms a centrally symmetrical radial configuration after installation. This not only ensures the geometric symmetry of each leg relative to the axis of the fan body 100 when the second support frame 300 is deployed, but more importantly, it ensures a balanced mass distribution of the fan device 10 during high-speed operation. When the motor drives the fan blades to rotate and generate centrifugal force, the evenly distributed support members 310 and their connecting structures can effectively counteract the radial eccentric torque, avoiding resonance or shaking caused by localized mass concentration, thereby improving operational stability and quietness. In contrast, if an asymmetrical or random arrangement is used, even if it can support the fan statically, it is very easy for the imbalance to exceed the standard under dynamic conditions, leading to increased noise or even accelerated bearing wear.

[0047] Regarding the specific molding process of the connecting protrusion 120, different implementation paths can be selected according to the material characteristics and production batch. For example, in a preferred embodiment, the connecting protrusion 120 can be integrally machined or integrally injection molded with the connecting end 110 body. For the metal fan body 100, evenly distributed protrusions can be milled directly at the end of the connecting end 110 by precision CNC turning, and thread profiles are retained between the protrusions. The connecting protrusion 120 obtained in this way is seamless with the base body, has extremely high shear strength, and the coaxiality is completely guaranteed by the machine tool precision, making it suitable for high-performance products. For plastic materials, it can be directly injection molded, which has extremely high production efficiency and low cost. As another optional implementation, the connecting protrusion 120 can also be manufactured by pressing in a separate insert. Specifically, a mounting hole or groove is first reserved at the end of the connecting end 110, and then the pre-machined high-strength metal or wear-resistant plastic protrusion insert is fixed in place by interference fit, hot melt riveting, or adhesive bonding. The advantage of this split design is that materials can be selected independently for the high-wear area of ​​the connecting protrusion 120. For example, a stainless steel protrusion can be embedded in the plastic body to withstand repeated friction of the shaft, or a high-precision ceramic protrusion can be embedded in a low-cost substrate to improve the smoothness of rotation, thereby achieving the optimal balance between performance and cost.

[0048] When designing this alternating arrangement structure, special attention must be paid to the matching relationship between the spacing of adjacent connecting protrusions 120 and the width of the connecting section 311, as well as the limitation of the thread engagement length on the height of the connecting protrusions 120. On the one hand, the circumferential clearance between two adjacent connecting protrusions 120 must be slightly greater than the width of the connecting section 311. Typically, an assembly gap of 0.1mm to 0.3mm is reserved on each side. This ensures that the connecting section 311 can rotate freely without sidewall friction jamming, while also preventing excessive gaps that could lead to excessive lateral movement of the support member 310 and affect the stability of the support. On the other hand, the axial extension height of the connecting protrusion 120 cannot exceed the effective engagement length of the thread. Otherwise, when the first support frame 200 is fully tightened, its end face may press against the top of the connecting protrusion 120 instead of the thread bearing surface, resulting in the preload not being effectively transmitted or even damaging the hinge structure. Therefore, in practical design, the top height of the connecting protrusion 120 should be at least one thread pitch lower than the thread termination point, or a clearance groove should be provided at the top of the connecting protrusion 120 to ensure that the threaded connection of the first support frame 200 always bears the force preferentially, ensuring that the two functions do not interfere with each other. This embodiment, through the above-mentioned refined spatial layout and dimensional matching design, not only solidifies the structural foundation for modular assembly and disassembly and multi-degree-of-freedom support, but also provides standardized installation interfaces and mechanical boundaries for the introduction of advanced features such as dedicated rotating shafts in subsequent embodiments.

[0049] In one implementation, the fan device 10 also includes multiple rotating shafts, each corresponding to a connecting section 311. Each connecting section 311 is rotatably connected to two adjacent connecting protrusions 120 via its corresponding rotating shaft. This design introduces an independent, dedicated rotating shaft as the motion transmission medium. Its core purpose is to remove the friction and wear generated during the swinging of the support member 310 from the connecting protrusions 120 of the fan body 100 and transfer it to a standard shaft that can be independently replaced or optimized. Specifically, if a hinged connection method is used where the connecting section 311 directly mates with the shaft hole of the connecting protrusion 120, long-term repeated rotation will cause the diameter of the plastic connecting protrusion 120 hole to gradually enlarge, deform, or even crack. Once the main structure is worn, it means that the entire fan body 100 is scrapped, resulting in extremely high maintenance costs. However, by setting an independent rotating shaft, even if the rotating shaft itself wears out due to long-term use, only the inexpensive standard part needs to be replaced to restore performance, significantly improving the maintainability and life-cycle reliability of the product. Furthermore, as an independent component, the shaft can be made of a superior wear-resistant material (such as stainless steel, copper alloy, or self-lubricating engineering plastic) compared to the fan body 100, and undergo specialized heat treatment or surface hardening processes. This significantly improves the tribological performance and service life of the rotating pair without increasing the manufacturing cost of the main body. Simultaneously, since the shaft is a high-precision standard part, its outer diameter tolerances and surface roughness can be reliably guaranteed by a professional supplier. This, in turn, reduces the machining precision requirements for the shaft hole of the connecting protrusion 120 on the fan body 100, allowing the main body to use low-cost molding processes such as injection molding without subsequent precision reaming, effectively balancing performance and manufacturing costs.

[0050] Regarding the specific fixing and assembly method of the rotating shaft on the connecting protrusion 120, different implementation paths can be selected according to product positioning and the degree of production automation. For example, in a preferred embodiment, a fixing method with interference fit at both ends can be adopted. Specifically, coaxial blind holes or through holes are opened on two adjacent connecting protrusions 120 as mounting positions. The diameters of both ends of the rotating shaft are slightly larger than the inner diameter of the mounting holes. During assembly, the two ends of the rotating shaft are forcibly pressed into the holes using a press, and the radial pressure generated by the interference fit achieves rigid locking between the rotating shaft and the connecting protrusion 120. At this time, the rotating shaft is stationary relative to the connecting protrusion 120, and the connecting section 311 is fitted onto the optical shaft part in the middle section of the rotating shaft and rotates around it. The advantage of this method is that the assembly process is simple, no additional fasteners are required, and the axial position of the rotating shaft is naturally limited by the pressing depth, making it suitable for mass automated assembly; however, it has certain requirements for the compressive strength of the connecting protrusion 120 to prevent the hole wall from cracking during pressing. As another optional implementation method, a structure with central riveting and free rotation at both ends can also be adopted. Specifically, the shaft has an annular step in the middle or a limiting flange formed by local upsetting. During assembly, the connecting section 311 is first fitted onto the shaft, then both ends of the shaft are passed through the through holes on the connecting protrusion 120. Finally, the shaft ends extending outside the through holes are riveted by screwing or hot riveting, ensuring the riveting head diameter is larger than the through hole diameter to prevent dislodgement. In this structure, the shaft is not completely fixed, but can rotate slightly synchronously with the connecting section 311 within a certain range or remain floating. The limiting flange and the riveting head together restrict the axial displacement of the shaft, but allow it to rotate around its own axis. The advantage of this method is that it avoids residual stress caused by interference fit to the plastic protrusion, reduces the risk of cracking, and the riveting process has lower sensitivity to hole diameter tolerances, resulting in better fault tolerance; it is especially suitable for scenarios where the connecting protrusion 120 has a thin wall thickness or is made of a brittle material.

[0051] The clearance between the shaft diameter and the connecting section 311 hole diameter is a key parameter determining the rotation feel and support stability, requiring meticulous design based on actual usage needs. If the clearance is too large (e.g., exceeding 0.15mm on one side), although assembly is easy and rotation is flexible, the support component 310 will experience significant radial wobble under load, causing slight vibrations in the fan body 100 under non-planar support, affecting user experience and visual stability. If the clearance is too small (e.g., less than 0.03mm on one side), while eliminating wobble, it requires extremely high coaxiality and surface finish; slight deviations or foreign object intrusion can lead to jamming, and it is prone to seizing when temperature changes cause thermal expansion and contraction. Therefore, in a recommended embodiment, the clearance on one side should be controlled between 0.05mm and 0.10mm, ensuring a smooth and unobstructed rotation experience while limiting radial wobble to a range imperceptible to the human eye. To further optimize the damping feel, the surface of the shaft can be knurled, coated with high-viscosity damping grease, or an elastic bushing can be embedded in the shaft hole of the connecting section 311. By adjusting these auxiliary means, the starting torque and holding torque can be precisely set to prevent the support 310 from slowly sagging due to gravity when it is not in operation.

[0052] Furthermore, to prevent axial movement of the shaft during use, which could cause the connecting section 311 to shift or detach, a reliable axial limiting structure is required. In addition to the limiting function inherent in the aforementioned riveting scheme, for interference-fit shafts, a stepped shoulder can be machined in the middle section of the shaft to precisely match the axial length of the connecting section 311. When the connecting section 311 is fitted in, the shoulders on both sides form a natural axial stop surface. Alternatively, after the shaft is pressed into place at both ends, an elastic snap ring or E-ring can be added to the outside of the connecting protrusion 120, using the snap ring to press against the outer end face of the protrusion to eliminate axial clearance. These anti-movement measures not only ensure the long-term geometric accuracy of the rotating pair but also avoid abnormal noise and increased wear caused by accumulated axial displacement. This embodiment, by introducing an independent shaft as the rotation medium and combining diverse fixing methods with precise fit design, successfully constructs a highly reliable, low-wear, and easy-to-maintain motion connection system, providing a solid mechanical guarantee for the stable operation of the second support frame 300 under various complex working conditions.

[0053] In one implementation, each shaft passes through two corresponding connecting protrusions 120. This structural feature transforms the stress model of the shaft from a single-sided cantilever beam to a simply supported beam with two supports, which is a key mechanical design feature to ensure the long-term stability and structural durability of the second support frame 300. Specifically, when the shaft is simultaneously penetrated and supported by two adjacent connecting protrusions 120, both ends of the shaft receive definite radial constraints, forming a stable simply supported beam mechanical system. Under this system, when the connecting section 311 is subjected to gravity loads from the fan body 100 or external lateral disturbances, the load is evenly distributed to the two support points, and the maximum bending moment and deflection in the middle of the shaft are significantly reduced. In contrast, if a cantilever structure with only one-sided connection and support for the protrusion 120 is used, the shaft is prone to plastic deformation or fatigue cracks at its root under long-term alternating loads, causing the axis to gradually shift. Once the axis shifts, the connecting section 311 will have uneven contact with the hole wall during rotation, leading to jamming, loosening, or even harsh friction noise, seriously affecting user experience and product lifespan. The dual-support through-hole structure used in this embodiment maintains the theoretical axis position of the shaft through geometric constraints, fundamentally eliminating the risk of motion instability caused by single-point failure, and ensuring smooth rotation and precise positioning of the support 310 throughout its entire lifespan.

[0054] Regarding the specific implementation of the shaft passing through the double connecting protrusions 120, different technical paths can be selected based on material properties, assembly efficiency, and cost objectives. For example, in a preferred embodiment, the shaft can adopt a through-shaft structure, that is, the shaft is a single-diameter optical shaft, the length of which is slightly greater than the distance between the outer end faces of the two connecting protrusions 120. During assembly, the connecting section 311 is first fitted into the middle section of the shaft, and then the entire shaft is inserted into the aligned shaft holes of the two connecting protrusions 120. Finally, the shaft ends protruding from the outer sides of the protrusions are riveted or hot-riveted to ensure that the diameter of the riveting head is larger than the diameter of the shaft hole to prevent them from coming loose. The advantage of this method is that the shaft body structure is simple, the processing cost is low, and the riveting and sealing process is mature and reliable, making it suitable for mass automated production. At the same time, since the shaft has a constant diameter throughout, its mating surface with the inner hole of the connecting section 311 is continuous and complete, which is conducive to the formation of a uniform oil film or damping grease distribution and improves the rotational feel. As an alternative implementation, the shaft can also adopt a stepped shaft structure, where the middle section of the shaft is a precision smooth shaft section for mating with the connecting section 311, and the two ends are thin shaft sections with smaller diameters for pressing into the mounting holes of the connecting protrusions 120. In this scheme, the length of the middle smooth shaft section precisely matches the axial width of the connecting section 311, and the two thin shaft sections are fixed in the connecting protrusions 120 by interference fit, eliminating the need for additional riveting. The advantage of the stepped shaft design is that it utilizes the shaft shoulder to achieve axial self-limiting of the connecting section 311, avoiding axial preload fluctuations that may occur with riveting, and the pressing of the thin shaft sections exerts less compressive stress on the protrusion material, reducing the risk of cracking of the plastic parts; however, it requires high precision in turning or cold heading, making it suitable for high-end products with extreme control over rotational clearance. It should be understood that regardless of whether a through-shaft riveting or stepped shaft pressing is used, as long as the mechanical essence of the shaft being supported by the two connecting protrusions 120 is achieved, it falls within the protection scope of this embodiment.

[0055] Furthermore, the double-connecting protrusion 120 support structure places more stringent requirements on manufacturing and assembly precision. The coaxiality of the two protrusion shaft holes is a core factor affecting the shaft's lifespan. If there is a significant coaxiality deviation between the two shaft holes, forcibly inserting the shaft will generate assembly prestress inside the shaft. This residual stress not only increases the rotational resistance torque but also accelerates the wear of the inner wall of the shaft hole and the surface of the shaft, and in extreme cases, may even cause the shaft to bend and deform. Therefore, in engineering design, the coaxiality tolerance of the two connecting protrusion 120 shaft holes should be controlled within φ0.05mm, and an integrated slider or precision insert should be used in the mold design stage to ensure forming accuracy. During assembly, to avoid hard assembly damage caused by misalignment, it is recommended to use dedicated centering fixtures or guide jigs to accurately position and align the two connecting protrusions 120 before guiding the shaft to smoothly insert. For stepped shaft designs with interference fits, a staged press-fit process can also be used, i.e., press one end in first, correct it, and then press in the other end to release accumulated errors. Meanwhile, setting a guide chamfer at the entrance of the 120mm shaft hole of the connecting protrusion or machining a guide cone surface at the end of the rotating shaft can effectively compensate for minor alignment deviations and improve assembly yield. This embodiment, through the aforementioned double-supported simply supported beam structure and its supporting implementation and control measures, constructs a high-rigidity, long-life, and low-noise rotating connection system, providing a solid mechanical foundation for the reliable operation of the fan device 10 in non-planar support scenarios. It also establishes the irreplaceable nature of this mechanical model in the design of similar products.

[0056] In one implementation, the second support frame 300 is threadedly connected to the fan body 100. It should be noted that the threaded connection in this embodiment is primarily used to fix and release the second support frame 300 relative to the fan body 100, serving a macroscopic switch between the first and second usage states. This is fundamentally different at the functional level from the microscopic rotation adjustment of the individual support member 310 relative to the fan body 100 described in the previous embodiments. Specifically, when the fan device 10 is in the first usage state, the second support frame 300 is securely locked to the bottom of the fan body 100 by tightening the threads. The self-locking characteristic of the threaded pair effectively resists vibrations and impacts generated during transportation or handling, preventing the second support frame 300 from accidentally loosening and falling off, ensuring structural integrity and safety in the stored state. When the user needs to switch to the second usage state, they only need to manually loosen the threaded connection to separate or release the second support frame 300 from the fan body 100. The entire process does not require additional tools such as screwdrivers, greatly improving the ease of operation and user experience during state switching. This design, which utilizes threaded connections for overall assembly and disassembly, is not only simple and reliable in structure, but also eliminates clearance through the axial preload of the threads, preventing the second support frame 300 from shaking or making abnormal noises when stored.

[0057] The specific thread profile selection for the threaded connection can be tailored to the weight class and usage frequency of the fan device 10. For example, in a preferred embodiment, a standard metric triangular thread can be used. This thread has a 60-degree thread angle, excellent self-locking performance and versatility, highly standardized machining tools, low manufacturing cost, and abundant readily available fasteners, making it ideal for lightweight portable fans or cost-sensitive consumer products. Its large frictional torque can meet basic static locking requirements without additional anti-loosening measures. As another optional implementation, for heavier or frequently disassembled professional-grade fan devices 10, a trapezoidal thread can be used. The trapezoidal thread typically has a 30-degree thread angle, offering higher transmission efficiency, greater root strength, and better wear resistance compared to triangular threads. It can withstand greater axial loads without easily slipping or plastic deformation. Although the self-locking property of trapezoidal threads is slightly inferior to that of triangular threads, their excellent load-bearing capacity makes them more suitable for heavy-duty connection scenarios between the heavy-duty fan body 100 and the second support frame 300. They can also maintain stable fitting accuracy after long-term repeated screwing, thus extending the service life of the product.

[0058] Furthermore, considering that the motor and fan blades of the fan device 10 will generate continuous high-frequency vibrations during operation, relying solely on the self-locking of the thread geometry may not be sufficient to completely prevent loosening. Therefore, corresponding anti-loosening measures are also required to ensure the long-term reliability of the connection. For example, nylon inserts can be embedded in the threaded holes of the fan body 100 or the second support frame 300. The elastic deformation of the nylon material fills the thread gaps and increases frictional resistance, achieving reusable mechanical anti-loosening. This method is environmentally friendly and has good temperature resistance, making it suitable for most household appliance scenarios. Alternatively, anaerobic thread-locking adhesive can be applied to the thread engagement surface. After curing, the adhesive forms a high-strength thermosetting plastic that fills all microscopic gaps, providing a strong anti-vibration and anti-loosening effect, while also having a sealing and rust-proof function. This is particularly suitable for fan devices 10 used in humid environments or under severe vibration conditions. When designing the number of thread engagement turns, a balance must be struck between connection strength and operational efficiency. Generally, the effective engagement length should be at least 1.5 times the nominal thread diameter to ensure sufficient pull-out force, but it should not exceed 3 times the diameter to avoid excessive disassembly and assembly travel, which would affect the user experience. For fan bodies 100 made of aluminum alloy or plastic, since the material strength is lower than that of steel bolts, it is recommended to increase the number of turns of screwing or use steel wire thread inserts for reinforcement to prevent internal thread peeling failure.

[0059] In one implementation, the first support frame 200 includes a column 210 and a base 220. The column 210 has a receiving space 201. When the fan device 10 is in its first use state, the fan body 100, column 210, and base 220 are sequentially threaded together. This three-section threaded series structure decouples the originally potentially integrated long rod-shaped support body into three independent functional modules. Its core engineering value lies in achieving a dual optimization of packaging and transportation efficiency and user experience. Specifically, in the packaging and transportation stage, the disassembled fan body 100, column 210, and base 220 can be compactly stacked in a flat packaging box, significantly reducing packaging volume and logistics costs, and avoiding the risk of damage during transportation caused by the excessive length of traditional integrated vertical fans. In the user and maintenance stage, the modular design allows each component to be disassembled and cleaned individually. For example, when dust or foreign objects accumulate inside the column 210, the user can directly unscrew both ends of the column 210 for thorough rinsing without worrying about water damage to the motor, greatly improving the product's ease of cleaning and hygiene standards. At the same time, this segmented design also gives the product higher maintenance economy. If a certain component (such as the base 220 wear or the column 210 deformation) is damaged, only the corresponding module needs to be replaced to restore the function of the whole machine, without scrapping the entire support system.

[0060] Regarding the specific connection method between the base 220 and the column 210, although both are fastened by threads, their mating form can be designed in various ways according to product positioning and performance requirements. For example, in a preferred embodiment, a structure can be adopted in which the internal thread of the base 220 and the external thread of the column 210 directly engage. Specifically, a connecting column with an internally threaded hole extends upward from the center of the base 220, and a matching externally threaded section is machined at the bottom end of the column 210. After the two are screwed together, a stable rigid connection is formed. This method has a simple structure, low processing cost, and high assembly efficiency, making it suitable for most household floor fan scenarios. As another optional implementation method, a connection structure can also be adopted in which the base 220 is equipped with a threaded insert and the end face of the column 210 is pressed and sealed. Specifically, the base 220 is injection molded with a high-strength metal threaded insert pre-embedded in its center, while the bottom of the column 210 is set as a flat annular end face. During assembly, the long bolts passing through the inside of the column 210 or the external locking nut are screwed into the insert of the base 220, and the axial tension is used to tightly press the end face of the column 210 against the upper surface of the base 220. Compared with direct thread engagement, this end face pressing method not only transmits torque through friction, effectively preventing loosening of the connection due to plastic creep after long-term use, but also sets a rubber sealing ring between the contact surfaces to achieve isolation and sealing between the inner cavity of the column 210 and the outside world, preventing moisture or insects from entering the housing space 201 and corroding the internal components. It is particularly suitable for fan equipment 10 used outdoors or in humid environments.

[0061] To ensure the three-section threaded tandem structure maintains precise coaxiality and circumferential positioning after repeated assembly and disassembly, and to avoid phase shifts or wobbling that may occur with threaded connections alone, an anti-misalignment structure needs to be added at the connection interface. For example, a raised-lower stop can be provided on the mating surfaces of the column 210 and the base 220. Specifically, a boss is machined at the bottom of the column 210, and a corresponding groove is formed in the base 220. During assembly, the boss engages with the groove to achieve radial limiting, while the thread only provides axial locking. This completely eliminates damage to the thread teeth from radial shear forces and ensures that the circumferential angle of the column 210 relative to the base 220 is consistent after each assembly. Alternatively, a locating pin and pin hole combination can be used. After the threads are screwed in, a transversely penetrating elastic cylindrical pin or a knob-type locating pin is inserted, preventing accidental loosening and serving as a visual alignment mark to help users quickly determine if the installation is in place. These auxiliary positioning measures work in conjunction with the threaded connection to ensure the overall rigidity and stability of the first support frame 200 in its first operating state.

[0062] Furthermore, since the column 210 in this embodiment serves as both a load-bearing support and a storage container, its wall thickness design needs to achieve a fine balance between structural strength and the utilization rate of the storage space 201. Specifically, while a thinner wall thickness of the column 210 can increase the inner diameter of the storage space 201 to accommodate more specifications of support members 310, it will result in insufficient compressive and bending section modulus, making it prone to buckling instability when the center of gravity of the fan body 100 is high or when subjected to lateral wind forces. Conversely, while a thicker wall thickness improves safety, it compresses the usable internal space, which may cause the second support frame 300 to be unable to be fully stored or to become stuck when pulled out.

[0063] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0064] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fan device, characterized in that, include: Fan body; A first support frame is detachably connected to the fan body, and the first support frame is provided with a receiving space; The second support frame is movably connected to the fan body so as to be selectively in a retracted state or a supported state. The fan device has a first usage state and a second usage state. When the fan device is in the first usage state, the second support frame is in the storage state and is stored in the accommodating space. The fan body can be placed on a flat surface through the first support frame. When the fan device is in the second usage state, the first support frame is separated from the fan body, the second support frame is in the supporting state, and the fan body can be placed on a non-flat surface through the second support frame.

2. The fan device according to claim 1, characterized in that, The second support frame includes multiple support members, each of which is rotatably connected to the fan body.

3. The fan device according to claim 2, characterized in that, The support member is arranged in a spiral shape.

4. The fan device according to claim 2, characterized in that, When the fan device is in the first use state, the second support frame is in the storage state, and the overall outer diameter of the plurality of support members is smaller than the inner diameter of the accommodating space.

5. The fan device according to claim 2, characterized in that, The support member includes a connecting section and a spiral support section connected to each other, and the end of the connecting section away from the spiral support section is spirally arranged.

6. The fan device according to claim 5, characterized in that, The fan body is provided with a connecting end, which is threadedly connected to the first support frame. The end of the connecting end is provided with a plurality of connecting protrusions along its axial direction. The plurality of connecting protrusions and the plurality of connecting segments are arranged alternately along the circumference of the connecting end. The connecting segments are rotatably connected between two adjacent connecting protrusions.

7. The fan device according to claim 6, characterized in that, The fan device also includes multiple rotating shafts, each rotating shaft corresponding to one of the connecting segments, and each connecting segment being rotatably connected to two adjacent connecting protrusions via the corresponding rotating shaft.

8. The fan device according to claim 7, characterized in that, Each of the said pivots passes through the corresponding two said connecting protrusions.

9. The fan device according to claim 1, characterized in that, The second support frame is threadedly connected to the fan body.

10. The fan device according to claim 1, characterized in that, The first support frame includes a column and a base. The column is provided with the receiving space. When the fan device is in the first use state, the fan body, the column and the base are connected in sequence by threads.

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