A folding fan with a rotatable chassis

Abstract

This utility model discloses a folding fan with a rotatable chassis, comprising: a fan head assembly, which includes a fan head housing and a fan blade mechanism, the fan blade mechanism being installed inside the fan head housing; a chassis assembly, which includes a fixed base and a rotating base, the rotating base being rotatably connected to the fixed base and capable of rotating around its own circumference; a first transmission component on the fixed base and a rotatable second transmission component on the rotating base, the second transmission component engaging with the first transmission component during rotation to drive the rotating base to rotate; a driving component for driving the second transmission component to rotate; and a support rod, one end of which is connected to the fan head housing and the other end of which is rotatably connected to the rotating base, and is used to rotate around the horizontal direction during rotation to fold into the rotating base. This effectively solves the problems of unstable center of gravity and inconvenience in carrying traditional fans during rotation.

Description

Technical Field

[0001] This utility model relates to the field of fans, and more particularly to a folding fan with a rotatable chassis. Background Technology

[0002] Most desktop fans on the market currently use a traditional oscillating structure, where a motor fixed inside the fan head drives the fan head to rotate relative to a support rod, thus achieving the oscillation function. Although this design is widely used, in actual use, because the fan head integrates core components such as the motor, fan blades, and control circuitry to drive its rotation, it generally results in a relatively large weight. Furthermore, the connection point between the fan head and the slender support rod is often designed to be quite thin, leading to a small stress area and high pressure. After prolonged use, the connection point continuously bears the weight of the fan head and the torque generated by the oscillation, making it highly susceptible to metal fatigue or material deformation. This can cause the fan head to sag, which not only changes the airflow angle and affects the performance, but may also increase the risk of tipping over due to a shift in the center of gravity, seriously affecting the product's lifespan and user experience. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art, the present invention provides a folding fan with a rotatable chassis, which drives the fan head to rotate through an integrated drive component in the chassis. The core drive component is lowered to the chassis, thereby shifting the center of gravity to the chassis and improving the overall structural stability.

[0004] The technical solution adopted by this utility model to solve its problem is:

[0005] A folding fan with a rotatable chassis, comprising:

[0006] A fan head assembly, comprising a fan head housing and a fan blade mechanism, wherein the fan blade mechanism is installed within the fan head housing;

[0007] A chassis assembly, comprising a fixed base and a rotating base, wherein the rotating base is rotatably connected to the fixed base and is rotatable along its own circumference; the fixed base is provided with a first transmission member, and the rotating base is provided with a rotatable second transmission member, wherein the second transmission member is used to engage with the first transmission member during rotation to drive the rotating base to rotate;

[0008] A driving element, the driving element being used to drive the second transmission element to rotate;

[0009] A support rod, one end of which is connected to the fan head housing, and the other end of which is rotatably connected to the rotating seat, and is used to rotate around the horizontal direction during rotation so as to fold into the rotating seat.

[0010] Furthermore, the second transmission component includes a gear ring that extends circumferentially along the fixed base;

[0011] The second transmission component includes a gear, which is rotatably mounted on the rotating seat and is used to mesh with the gear ring during rotation; the driving component is used to drive the gear to rotate.

[0012] Furthermore, the fixed base is provided with a guide groove, the guide groove extends circumferentially along the fixed base, and the gear ring is disposed at the edge of the guide groove;

[0013] The bottom of the rotating seat is provided with a guide member, which is used to slide in the guide groove when the rotating seat rotates, so as to guide the rotating seat to move circumferentially along the fixed seat.

[0014] Furthermore, the guide includes a ball bearing, which is mounted in the guide groove and rolls in cooperation with the guide groove.

[0015] Furthermore, the guide also includes a ball sleeve, which is fitted around the outer periphery of the ball; the ball sleeve is made of an elastic material.

[0016] Furthermore, the bottom of the rotating seat has a mounting groove that extends circumferentially along the rotating seat, and the fixed seat is mounted to the mounting groove;

[0017] The fixing base is provided with a connecting edge, and the side wall of the mounting groove is provided with multiple buckles. The multiple buckles are distributed at intervals along the circumference of the mounting groove. The buckles are used to engage the connecting edge with the fixing base and slide with the connecting edge.

[0018] Furthermore, the rotating seat includes a first housing and a second housing, the second housing being detachably connected to the first housing and forming a mounting cavity with each other, and the driving member and the first transmission member being installed in the mounting cavity.

[0019] Furthermore, the rotating base is provided with a storage cavity; the support rod includes at least a first rod segment and a second rod segment, the first rod segment and the second rod segment can move closer to each other or further away from each other, so that the support rod is in a folded state or an unfolded state; the first rod segment is rotatably connected to the fan head housing through a first rotating member; the second rod segment is rotatably connected to the base through a second rotating member; the second rod segment is used to rotate when the support rod is in the folded state and fold into the storage cavity.

[0020] Furthermore, the fan head housing has a protrusion for inserting into the storage cavity when the support rod is in a folded state.

[0021] Furthermore, the fan head housing includes a third housing and a fourth housing, the third housing being connected to the fourth housing; the third housing is provided with a hook portion, the hook portion including a connecting arm and a snap-fit ​​arm, the connecting arm being connected to the third housing, and the snap-fit ​​arm being perpendicularly connected to the connecting arm;

[0022] The fourth housing is provided with a bayonet, and the snap-fit ​​arm extends into the bayonet and is used to rotate after extending into the bayonet so that the snap-fit ​​arm abuts against the end wall of the bayonet.

[0023] In summary, the folding fan with a rotatable chassis provided by this utility model has the following technical effects: its fan head assembly is connected to the rotating seat of the chassis assembly via a support rod. Since the rotating seat engages with the first transmission component on the fixed seat via a second transmission component, when the drive component drives the second transmission component to rotate, the second transmission component can cooperate with the first transmission component to drive the rotating seat to rotate, so that the fan head assembly connected to it rotates synchronously. Because the drive component and the first and second transmission components are integrated into the chassis, the weight of the fan head assembly is significantly reduced, lowering the center of gravity of the entire unit to the chassis area. This effectively reduces the sagging problem caused by a "top-heavy" design, avoids the risk of loosening and deformation at the connection points after long-term use, indirectly improves the stability of the structure, and extends its service life. At the same time, since the support rod can be folded onto the chassis assembly, it is convenient for users to fold and carry. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram showing the unfolded structure of the present invention;

[0026] Figure 2 This is a schematic diagram showing the folded structure of the present invention;

[0027] Figure 3 This is an exploded view of the structure of this utility model;

[0028] Figure 4 This is an exploded view of the chassis assembly in this utility model;

[0029] Figure 5 This is another exploded view of the chassis assembly in this utility model;

[0030] Figure 6 This is a structural cross-sectional view of the chassis assembly in this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the fixing base in this utility model;

[0032] Figure 8 This is a schematic diagram of the rotating seat in this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the third shell in this utility model;

[0034] Figure 10 This is a schematic diagram of the structure of the fourth shell in this utility model;

[0035] The meanings of the reference numerals in the attached figures are as follows:

[0036] 10. Fan head assembly; 11. Fan head housing; 111. Third housing; 1111. Hook; 11111. Connecting arm; 11112. Snap-fit ​​arm; 112. Fourth housing; 1121. Bayonet; 113. Protrusion; 12. Fan blade mechanism; 20. Chassis assembly; 21. Fixing base; 211. First transmission component; 212. Guide groove; 213. Connecting edge; 22. Rotating seat; 221. Second transmission component; 222. Guide component; 223. Mounting groove; 2231. Buckle; 224. First housing; 225. Second housing; 226. Mounting cavity; 227. Storage cavity; 228. Pressure ring; 30. Support rod; 31. First rod segment; 32. Second rod segment; 40. Drive component. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0040] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0041] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0042] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0043] See Figure 1 and Figure 9 This utility model discloses a folding fan with a rotatable chassis, including a fan head assembly 10, a chassis assembly 20, a drive component 40, and a support rod 30. Specifically, the fan head assembly 10 includes a fan head housing 11 and a fan blade mechanism 12, with the fan blade mechanism 12 installed inside the fan head housing 11. The chassis assembly 20 includes a fixed base 21 and a rotating base 22, which is rotatably connected to the fixed base 21 and can rotate around its own circumference. A first transmission component 211 is provided on the fixed base 21, and a rotatable second transmission component 221 is provided on the rotating base 22. When rotating, the second transmission component 221 engages with the first transmission component 211 to drive the rotating base 22 to rotate, while the drive component 40 is used to drive the second transmission component 221 to rotate. In addition, one end of the support rod 30 is connected to the fan head housing 11, and the other end of the support rod 30 is rotatably connected to the rotating base 22, and rotates around the horizontal direction to fold into the rotating base 22.

[0044] Based on the above structure, the first transmission component 211 can be a ring gear, integrally formed or embedded along the circumference of the chassis mounting base 21, serving as the fixed base of the transmission system. The second transmission component 221 is a cylindrical gear, rotatably mounted on the rotating base 22, with the gear axis coaxial with the rotation center of the rotating base 22. During assembly, the gear teeth mesh with the ring gear, forming a gear pair transmission structure. The drive component 40 is rigidly connected to the gear via a linkage shaft or transmission shaft.

[0045] Specifically, when the drive unit 40 is powered on, the high-speed rotation of the motor is transmitted to the gear through the shaft system, causing it to rotate. Since the gear ring is fixed to the fixed base 21 and cannot rotate, the gear is subjected to a reverse tangential force applied by the gear ring during meshing. This tangential force forces the gear to make circumferential motion along the inner side of the gear ring, thereby driving the rotating base 22 to rotate synchronously. At this time, the rotational motion of the rotating base 22 is transmitted through the support rod 30. When the rotating base 22 rotates, the support rod 30 acts as a transmission link, driving the fan head assembly 10 to rotate circumferentially in the chassis assembly 20, thus realizing the oscillating air supply function.

[0046] By integrating the drive unit 40 and the first and second transmission components into the chassis, the weight of the fan head assembly 10 is effectively reduced, lowering the center of gravity of the entire unit and improving the stability and anti-tipping ability of the fan during operation, making it more stable during rotation. At the same time, it effectively reduces the sagging problem caused by "top-heavy" operation, avoids the risk of loosening and deformation at the connection points after long-term use, and indirectly extends the service life of the entire unit.

[0047] In addition, the first transmission component 211 in this embodiment can also be a conventional rack and pinion synchronous belt, while the second transmission component 221 is a gear that meshes with it. During assembly, the rack and pinion synchronous belt has a closed annular structure, arranged along the inner circumference of the fixed seat 21, forming a shape similar to a "gear ring". The inner side of the synchronous belt (facing the rotating seat 22) has a uniformly distributed tooth structure that matches the gear teeth. At the same time, both ends of the synchronous belt are fixed to the fixed seat 21 by a tensioning mechanism (such as a spring tensioner) to maintain appropriate tension in the synchronous belt and prevent slack or slippage. The gear is mounted on the central shaft of the rotating seat 22 through bearings, and its axis coincides with the rotation center of the rotating seat 22 and meshes with the rack and pinion synchronous belt.

[0048] Thus, when the drive component 40 drives the gear to rotate at high speed around its axis, the gear meshes with the rack and pinion belt, and the gear teeth sequentially push the tooth structure of the timing belt, converting the rotational motion into the linear motion tendency of the timing belt. At this time, because the timing belt is fixed in a ring on the fixed seat 21, it cannot move linearly. The gear will be subjected to a reaction force when pushing the timing belt. This reaction force forces the gear to make a circular motion along the inner side of the timing belt (i.e., the gear rotates around the center of the fixed seat 21), thereby driving the rotating seat 22 connected to it to rotate synchronously. Of course, the first transmission component 211 can also be an existing arc-shaped rack, which can achieve the same effect.

[0049] In summary, the meshing transmission between the first transmission component 211 and the second transmission component 221, through the rigid meshing of the teeth, is superior to the non-meshing transmission in terms of accuracy, efficiency, load capacity, and structural compactness. It is especially suitable for scenarios requiring long-term stable operation and high reliability, and indirectly improves the stability of chassis rotation.

[0050] More specifically, in this embodiment, the support rod 30 is a single rod-shaped structure, with both ends connected to the fan head housing 11 and the rotating seat 22 via pivots, enabling rotation around a horizontal axis. When folding is required, the support rod 30 is rotated toward the chassis assembly 20 until it is folded onto the rotating seat 22. When unfolding is required, it is rotated again toward a direction away from the rotating seat 22 to unfold.

[0051] Of course, the support rod 30 can also be divided into multiple connecting rods. Multiple connecting rods can be extended or retracted to different lengths through sliding or snap-fit ​​structures 2231. During assembly, one of the connecting rods can be embedded into the bottom of the fan head housing 11 through a ball joint, allowing it to rotate and achieve multi-angle air delivery. A connecting rod near the rotating seat 22 is rotatably connected to the rotating seat 22 through the rotating seat 22 or a rotating shaft, and its extension and retraction position is fixed by a spring pin. When it needs to be folded, multiple connecting rods are slid to fold, and then rotated toward the rotating seat 22 until folded onto the rotating seat 22. When it needs to be unfolded, it is rotated in the opposite direction and multiple connecting rods are slid relative to each other to unfold. This allows for extension and retraction of different lengths through multiple connecting rods to meet the air delivery needs at different heights.

[0052] In addition, the support rod 30 can also be connected by multiple connecting rods through hinges, adopting a parallelogram mechanism or a triangular folding structure. When folded, the support rod 30 can be folded together and attached to the rotating base 22. The fan head assembly 10 can be folded onto the rotating base 22 by folding the support rod 30, which is convenient for users to store, saves storage space, and is easy to carry.

[0053] It should be noted that, in this embodiment, when the rotating seat 22 and the fixed seat 21 are assembled, an annular groove can be provided at the bottom of the rotating seat 22, and the shape of the fixed seat 21 can match the annular groove so that it can be embedded in the annular groove. The outer peripheral wall of the fixed seat 21 abuts against the groove wall of the annular groove. By providing a limiting structure (such as a buckle 2231, specifically a flexible cantilever structure) on the groove wall of the annular groove, the buckle 2231 can elastically deform during assembly, so that the fixed seat 21 can be embedded in the annular groove. After the installation is completed, it returns to its original position and provides a pre-tightening force to limit the fixed seat 21, preventing the fixed seat 21 from disengaging from the rotating seat 22. In this way, when the second transmission member 221 meshes with the first transmission member 211, the rotating seat 22 can move circumferentially along the fixed seat 21 to achieve rotation.

[0054] Of course, in another implementation, a hemispherical protrusion with a smooth surface (which can be inlaid with PTFE coating) can be provided on the top of the fixed seat 21, and a matching hemispherical groove can be opened at the bottom of the rotating seat 22. A spherical sliding bearing is embedded in the groove, and the rotating seat 22 is fastened to the fixed seat 21 by an annular pressure plate or retaining ring, allowing it to rotate. Alternatively, an annular guide rail can be provided on the outer periphery of the fixed seat 21, and a slider (with built-in ball or roller) matching the guide rail can be installed at the bottom of the rotating seat 22. The slider slides circumferentially along the guide rail, and flanges are provided on both sides of the guide rail. The slider is locked between the flanges by rollers or pressure plates to prevent derailment. This method can also achieve the rotational engagement of the rotating seat 22 and the fixed seat 21. The specific configuration can be set according to actual needs, and will not be described in detail here.

[0055] In addition, the drive unit 40 in this embodiment can be a conventional miniature DC motor, stepper motor, or synchronous motor. The fan blade mechanism 12 can be a conventional axial flow fan or centrifugal fan.

[0056] Preferably, in this embodiment, the second transmission component 221 includes a gear ring extending circumferentially along the fixed base 21. The second transmission component 221 also includes a gear rotatably mounted on the rotating base 22 and meshing with the gear ring during rotation. The driving component 40 drives the gear to rotate. When the fan needs to oscillate, the driving component 40 is activated, driving the gear to rotate, causing the gear to move along the gear ring, thus displacing the rotating base 22 circumferentially and driving the fan head assembly 10 to rotate. Because the gear and gear ring mesh with each other through tooth profiles, the transmission ratio is relatively fixed, thereby achieving stable speed conversion and angle control, avoiding uneven oscillation caused by slippage.

[0057] Compared to synchronous belt drives, which may slip due to insufficient tension, and friction wheel drives, which are easily affected by load changes in speed, the rotational motion of the rotating seat 22 is made smoother by gear and gear ring drives.

[0058] Furthermore, the fixed seat 21 is provided with a guide groove 212, which extends circumferentially along the fixed seat 21, and a gear ring is provided at the edge of the guide groove 212; the bottom of the rotating seat 22 is provided with a guide member 222, which is used to slide with the guide groove 212 when the rotating seat 22 rotates, so as to guide the rotating seat 22 to move circumferentially along the fixed seat 21.

[0059] Specifically, by extending the guide groove 212 circumferentially along the fixed base 21, a unique path is provided for the rotational movement of the rotating base 22, ensuring that the rotating base 22 can only move in a circle around the central axis of the fixed base 21, thus avoiding radial offset or wobbling. Simultaneously, because the bottom of the rotating base 22 is equipped with a guide member 222 that slides within the guide groove 212, when the rotating base 22 rotates, the guide member 222 can only move within the guide groove 212. This forces the rotating base 22 to move only along the circumferential trajectory of the guide groove 212 (i.e., in a circle around the central axis of the fixed base 21), eliminating unnecessary degrees of freedom such as radial offset and axial wobbling, ensuring that the gear and gear ring always maintain the correct meshing position during transmission.

[0060] It should be noted that the guide 222 in this embodiment can be an existing rolling guide 222 (such as a roller or ball bearing) to convert sliding friction into rolling friction; or a sliding guide 222 (such as a protrusion) to reduce friction through surface lubrication (such as applying grease), resulting in a compact structure. During installation, the radial clearance between the guide 222 and the guide groove 212 needs to be controlled to avoid jamming if the clearance is too small, or shaking and transmission noise if the clearance is too large. Furthermore, oil grooves or grease should be applied to the contact surface between the guide 222 and the groove wall to reduce sliding friction (for protruding guide blocks) or rolling friction (for rollers), extending service life.

[0061] Preferably, the guide 222 in this embodiment includes a ball, such as a bearing steel ball or a stainless steel ball. During assembly, one end of the ball is embedded in the rotating seat 22, and the other end is installed in the guide groove 212, so that the ball and the guide groove 212 roll into each other.

[0062] Compared to traditional sliding fits, which have a higher coefficient of friction and require overcoming greater resistance during movement, potentially leading to overheating, wear, or even jamming, the rolling balls within the guide groove 212 exhibit rolling friction with an extremely low coefficient of friction, resulting in smoother and easier rotation of the rotating seat 22. Furthermore, because the rolling balls engage in point contact or small-area line contact, the load on the rotating seat 22 can be evenly distributed along the circumference of the guide groove 212, avoiding motion deviations caused by uneven wear of the contact surfaces in traditional sliding fits.

[0063] More specifically, the guide 222 also includes a ball sleeve, which is fitted around the outer periphery of the ball; the ball sleeve is made of an elastic material so that it can absorb the instantaneous impact force during the movement (such as the inertial impact during start-stop and reversing) through the elastic deformation of the ball sleeve, thereby reducing noise and wear caused by rigid collisions.

[0064] It should be noted that the ball bearing sleeve in this embodiment can be made of existing elastic materials such as polyurethane (PU), rubber or silicone.

[0065] Furthermore, the bottom of the rotating seat 22 has a mounting groove 223, which extends circumferentially along the rotating seat 22. The fixed seat 21 is installed into the mounting groove 223. The fixed seat 21 has a connecting edge 213 on its upper side. The side wall of the mounting groove 223 has multiple buckles 2231, which are distributed at intervals circumferentially along the mounting groove 223. The buckles 2231 are used to engage the connecting edge 213 in the fixed seat 21 and slide with the connecting edge 213.

[0066] Specifically, during assembly, the circumferentially extending mounting groove 223 is fitted with the shape of the fixed seat 21 to ensure that the rotating seat 22 and the fixed seat 21 remain coaxial after assembly, reducing eccentricity error and improving rotational accuracy. Simultaneously, after installation, the sidewall of the mounting groove 223 engages with the outer circumferential surface of the fixed seat 21, limiting radial offset. At this time, because the snap-fit ​​2231 engages with the connecting edge 213, it restricts the axial movement of the fixed seat 21 along the rotating seat 22 (i.e., the vertical direction), preventing the fixed seat 21 from detaching from the rotating seat 22.

[0067] Furthermore, the sliding engagement between the buckle 2231 and the connecting edge 213 allows the fixed seat 21 to rotate freely around the circumference of the rotating seat 22. At the same time, the limiting effect of the buckle 2231 restricts the vertical displacement of the fixed seat 21, so that the rotating seat 22 can rotate freely while being connected to the fixed seat 21.

[0068] It should be noted that the buckle 2231 can maintain a certain gap with the top wall of the mounting groove. Simultaneously, a guide slope or arc surface is provided on the end wall of the buckle 2231, allowing the connecting edge 213 to slide into the gap between the buckle 2231 and the top wall of the mounting groove, guided by the slope or arc surface of the end wall of the buckle 2231, thus achieving a limiting position. At the same time, the existence of the gap allows for a certain degree of freedom between the connecting edge 213 and the rotating seat 22, enabling the rotating seat 22 to rotate relative to it.

[0069] In addition, in this embodiment, a clamping ring 228 is also provided at the bottom of the rotating seat (e.g., Figure 6As shown, after one side of the fixed base 21 is initially fixed to the buckle 2231 via the connecting edge 213, the clamping ring 228 can be placed against the lower part of the fixed base 21 with a certain gap. Then, the clamping ring 228 is connected to the bottom of the rotating base 22 via screws or bolts, so that the other side of the fixed base 21 can be blocked by the clamping ring 228, preventing the other side of the fixed base 21 from moving up and down. At the same time, since there is a certain gap between the clamping ring 228 and the fixed base 21, the rotating base 22 can rotate freely.

[0070] More specifically, the rotating base 22 in this embodiment includes a first housing 224 and a second housing 225. The second housing 225 is detachably connected to the first housing 224 and they enclose each other to form a mounting cavity 226. During assembly, the first housing 224 and the second housing 225 can be separated first, allowing the drive component 40, the first transmission component 211, and other accessories to be installed in the mounting cavity 226. After assembly, the first housing 224 and the second housing 225 can be connected again. If maintenance is required later, the first housing 224 and the second housing 225 can also be separated at any time for easy maintenance and repair.

[0071] It should be noted that in this embodiment, the first housing 224 and the second housing 225 can be connected by screws or bolts or other connecting parts, or by setting buckles 2231 and slots on the first housing 224 or the second housing 225 respectively, so that the two can be engaged and connected, and can be disassembled.

[0072] Furthermore, the rotating base 22 is provided with a storage cavity 227; the support rod 30 includes at least a first rod segment 31 and a second rod segment 32, which can move closer to or further away from each other to allow the support rod 30 to be in a folded or unfolded state; the first rod segment 31 is rotatably connected to the fan head housing 11 through a first rotating member; the second rod segment 32 is rotatably connected to the base through a second rotating member; the second rod segment 32 rotates when the support rod 30 is in the folded state and folds into the storage cavity 227.

[0073] Specifically, when the fan needs to be folded, the first rod segment 31 and the second rod segment 32 are brought closer together. Through their relative movement, the support rod 30 changes from an unfolded state to a folded state, significantly shortening its length. Subsequently, the second rod segment 32 rotates about the second rotating component as an axis towards the storage cavity 227 on the base, storing the folded support rod 30 inside the storage cavity 227. Since the first rod segment 31 is rotatably connected to the fan head housing 11 through the first rotating component, during the rotation and storage process of the second rod segment 32, it will drive the fan head assembly 10 to move synchronously towards the storage cavity 227. When it approaches the storage cavity 227, the fan head housing 11 can be rotated to align with the storage cavity 227, until the fan head assembly 10 can also be stored inside the storage cavity 227 of the base. In this way, the folded fan head assembly 10 and support rod 30 can be stored inside the base, greatly compressing the product's space volume, achieving efficient storage, and making it convenient for storage and carrying.

[0074] When unfolding the fan, the second rod segment 32, which is stored in the base storage cavity 227, is first rotated out of the storage cavity 227 and unfolded outward around the second rotating component. As the second rod segment 32 rotates, the first rod segment 31, which is connected to the second rod segment 32 through the first rotating component, and the fan head assembly 10 are also unfolded. Next, the first rod segment 31 and the second rod segment 32 are moved away from each other, causing the support rod 30 to gradually change from a folded state to an unfolded state, restoring it to its normal length. At this time, the fan head assembly 10 is at a suitable height and angle, and the position of the fan blade mechanism 12 within the fan head housing 11 is also adjusted. The entire fan is now fully unfolded and in normal working condition, providing users with a comfortable airflow experience.

[0075] Specifically, in this embodiment, the first segment 31 and the second segment 32 adopt a nested design. A limiting protrusion is provided on the inner wall of the second segment 32, and a corresponding limiting groove is provided on the outer wall of the first segment 31. They can move closer or further apart by sliding. A locking button can be added to the end of the segment. When unfolded, the button is locked into the groove. When folded, pressing the button releases the lock, ensuring stability and ease of folding.

[0076] Of course, the first segment 31 and the second segment 32 of the support rod 30 can also be connected by a hinge shaft. By setting a torsion spring at the connection point, the torsion spring provides support to keep the rod upright when unfolded, and overcomes the resistance of the torsion spring to bend the segment when folded. A buckle 2231 can also be set at the hinge point, which automatically engages when unfolded and manually unlocks when folded to prevent accidental folding. The specific number of the first segment 31 can be set to one, two, or more depending on the required unfolding height of the fan head assembly 10.

[0077] Furthermore, the storage cavity 227 can be a groove formed on the rotating base 22 and matched with the shape of the fan head housing 11, so that the fan head housing 11 can be inserted into it when moving toward it. Of course, the chassis assembly 20 can also be set with a hollow structure, so that the rotating base 22 and the fixed base 21 are integrally formed with the storage cavity 227.

[0078] It should be noted that both the first rotating component and the second rotating component can be selected from existing rotating shafts or steering ball joints, etc., to achieve a rotating connection with the fan head housing 11 and the chassis assembly 20.

[0079] More specifically, regarding the protrusion 113 on the fan head housing 11, when the fan is folded, the first segment 31 and the second segment 32 of the support rod 30 are first brought close together to fold it. Then, with the second rotating component as the axis, the folded support rod 30 is rotated toward the base storage cavity 227. During the rotation, the angle of the fan head housing 11 is adjusted simultaneously so that the protrusion 113 on the fan head housing 11 is aligned with the entrance direction of the storage cavity 227. After the support rod 30 is completely folded into the storage cavity 227, the protrusion 113 on the fan head housing 11 is inserted into the storage cavity 227, making it tightly abut against the cavity wall. This forms a stable mechanical fit between the protrusion 113 and the storage cavity 227, effectively limiting the displacement of the fan head housing 11 and reducing the swaying amplitude in the folded state, making the overall fan storage more stable and reliable.

[0080] It should be noted that the protrusion 113 may be a protruding ring or a protruding block or other structure provided on the fan head housing 11 to match the storage cavity 227, so that it can be inserted into the storage cavity 227.

[0081] Furthermore, the fan head housing 11 includes a third housing 111 and a fourth housing 112. The third housing 111 is connected to the fourth housing 112. The third housing 111 is provided with a hook portion 1111. The hook portion 1111 includes a connecting arm 11111 and a snap-fit ​​arm 11112. The connecting arm 11111 is connected to the third housing 111, and the snap-fit ​​arm 11112 is perpendicularly connected to the connecting arm 11111. The fourth housing 112 is provided with a bayonet 1121. The snap-fit ​​arm 11112 extends into the bayonet 1121 and is used to rotate after extending into the bayonet 1121 so that the snap-fit ​​arm 11112 abuts against the end wall of the bayonet 1121.

[0082] Specifically, during installation, the mating surfaces of the third housing 111 and the fourth housing 112 are aligned so that the axis of the latching arm 11112 of the latching part 1111 is parallel to the axis of the bayonet 1121. At this time, the user can apply external force to the third housing 111 to fully insert the latching arm 11112 into the bayonet 1121 until the connecting arm 11111 contacts the surface of the fourth housing 112. Then, the user can manually rotate the third housing 111 to rotate the latching arm 11112 around the axis of the connecting arm 11111. When rotating, the latching arm 11112 slides into the locking area of ​​the bayonet 1121. When the end of the latching arm 11112 is completely against the end wall of the bayonet 1121, the rotation stops. At this time, since the locking arm 11112 is perpendicularly connected to the connecting arm 11111, when the locking arm 11112 rotates to abut against the end wall of the bayonet 1121, the connecting arm 11111, which is perpendicular to the locking arm 11112, blocks the end of the locking arm 11112, preventing the locking arm 11112 from continuing to rotate in the same direction (limiting function), thus avoiding connection failure due to over-rotation.

[0083] The engagement of the hook 1111 and the bayonet 1121 initially limits the positioning of the third housing 111 and the fourth housing 112, preventing displacement of the bottom housing during subsequent component installation. Then, it can be tightened again using screws or other connecting parts, improving overall installation efficiency. Furthermore, the combination of these two methods not only enhances assembly efficiency and structural strength but also reduces reliance on the performance of individual components (such as screws or hooks) through functional complementarity.

[0084] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A folding fan with a rotatable chassis, characterized in that, include: A fan head assembly, comprising a fan head housing and a fan blade mechanism, wherein the fan blade mechanism is installed within the fan head housing; A chassis assembly, comprising a fixed base and a rotating base, wherein the rotating base is rotatably connected to the fixed base and is rotatable along its own circumference; the fixed base is provided with a first transmission member, and the rotating base is provided with a rotatable second transmission member, wherein the second transmission member is used to engage with the first transmission member during rotation to drive the rotating base to rotate; A driving element, the driving element being used to drive the second transmission element to rotate; A support rod, one end of which is connected to the fan head housing, and the other end of which is rotatably connected to the rotating seat, and is used to rotate around the horizontal direction during rotation so as to fold into the rotating seat.

2. The folding fan with a rotatable chassis as described in claim 1, characterized in that, The second transmission component includes a gear ring that extends circumferentially along the fixed base; The second transmission component includes a gear, which is rotatably mounted on the rotating seat and is used to mesh with the gear ring during rotation. The driving component is used to drive the gear to rotate.

3. The folding fan with a rotatable chassis as described in claim 2, characterized in that, The fixed base is provided with a guide groove, which extends circumferentially along the fixed base, and the toothed ring is located at the edge of the guide groove; The bottom of the rotating seat is provided with a guide member, which is used to slide in the guide groove when the rotating seat rotates, so as to guide the rotating seat to move circumferentially along the fixed seat.

4. The folding fan with a rotatable chassis as described in claim 3, characterized in that, The guide includes balls that are mounted in the guide groove and roll in cooperation with it.

5. The folding fan with a rotatable chassis as described in claim 4, characterized in that, The guide also includes a ball sleeve, which is fitted around the outer periphery of the ball; the ball sleeve is made of an elastic material.

6. The folding fan with a rotatable chassis as described in any one of claims 1-5, characterized in that, The bottom of the rotating seat has a mounting groove, which extends circumferentially along the rotating seat, and the fixing seat is fitted into the mounting groove. The fixing base is provided with a connecting edge, and the side wall of the mounting groove is provided with multiple buckles. The multiple buckles are distributed at intervals along the circumference of the mounting groove. The buckles are used to engage the connecting edge with the fixing base and slide with the connecting edge.

7. The folding fan with a rotatable chassis as described in any one of claims 1-5, characterized in that, The rotating base includes a first housing and a second housing. The second housing is detachably connected to the first housing and they enclose each other to form a mounting cavity. The driving component and the first transmission component are installed in the mounting cavity.

8. The folding fan with a rotatable chassis as described in any one of claims 1-5, characterized in that, The rotating base is provided with a storage cavity; the support rod includes at least a first rod segment and a second rod segment, which can move closer to or further away from each other to make the support rod folded or unfolded; the first rod segment is rotatably connected to the fan head housing through a first rotating member; the second rod segment is rotatably connected to the rotating base through a second rotating member; the second rod segment is used to rotate when the support rod is folded and fold into the storage cavity.

9. The folding fan with a rotatable chassis as described in claim 8, characterized in that, The fan head housing has a protrusion that is used to insert into the storage cavity when the support rod is in a folded state.

10. The folding fan with a rotatable chassis as described in any one of claims 1-5, characterized in that, The fan head housing includes a third housing and a fourth housing, the third housing being connected to the fourth housing; the third housing is provided with a hook portion, the hook portion including a connecting arm and a snap-fit ​​arm, the connecting arm being connected to the third housing, and the snap-fit ​​arm being perpendicularly connected to the connecting arm; The fourth housing is provided with a bayonet, and the snap-fit ​​arm extends into the bayonet and is used to rotate after extending into the bayonet so that the snap-fit ​​arm abuts against the end wall of the bayonet.

Images