Table fan

Abstract

The application discloses a table fan, which comprises a fan head and a supporting base. The supporting base comprises a base and a supporting structure connected between the base and the fan head, and the base and the supporting structure are rotationally connected through a connecting structure. The base comprises an outer shell and a driving assembly, the driving assembly drives the supporting structure to rotate around the vertical direction through a driving connecting structure, so that the fan head rotates around the vertical direction relative to the base, thereby realizing the swing of the fan head. The connecting structure comprises a connecting seat and a rotating shaft fixedly connected with the connecting seat, and the supporting structure is connected with the connecting seat; the driving assembly comprises a first driving gear, the first driving gear is sleeved on the rotating shaft and rotationally connected with the rotating shaft to synchronously rotate, and the connecting structure further comprises a press-fit piece connected with the connecting seat, the press-fit piece is located on the first side of the rotating shaft and is press-fitted with the first driving gear. Through the design of the press-fit piece, the problem that the driving motor of the driving assembly is burnt out due to the failure of the fan head to normally swing can be effectively solved.

Description

Technical Field

[0001] This application relates to the field of fan technology, and more particularly to a desktop fan. Background Technology

[0002] As people's demands for quality of life continue to rise, various portable and energy-saving electrical appliances are widely used in daily life, with desktop fans being particularly popular due to their small size and ease of use. Currently, most desktop fans on the market have an oscillation function to achieve wide-angle airflow and improve air circulation efficiency.

[0003] In related technologies, if a desktop fan is blocked by human intervention or external obstacles during normal oscillation, the motor shaft of the motor connected to the gear will not be able to rotate due to the inherent structural design of the desktop fan, causing the gear used to achieve the oscillation function to fail to rotate properly, thus burning out the motor. Utility Model Content

[0004] This application provides a desktop fan that solves the problem in related technologies where the fan head cannot rotate normally due to human obstruction or external obstacles during normal oscillation, resulting in motor burnout.

[0005] This application embodiment provides a desktop fan; the desktop fan includes:

[0006] Fan head; and

[0007] A support base is provided for connecting and supporting a fan head. The support base includes a base and a support structure connected between the base and the fan head. The base and the support structure are rotatably connected via a connecting structure. The base includes a housing and a drive assembly mounted on the housing. The drive assembly drives the support structure to rotate in a vertical direction via the drive connecting structure, so that the fan head rotates relative to the base in the vertical direction, thereby achieving oscillation of the fan head. The connecting structure includes a connecting seat and a rotating shaft fixedly connected to the connecting seat. The support structure is connected to the connecting seat. The drive assembly includes a first drive gear, which is sleeved on the rotating shaft and rotatably connected to the rotating shaft. The connecting structure also includes a pressing member connected to the connecting seat, which is located on the first side of the rotating shaft and presses against the first drive gear.

[0008] The desktop fan based on this application embodiment features a press-fit component that allows the first drive gear to rotate relative to the shaft. When the fan head is obstructed by human intervention or external obstacles and cannot rotate normally, the press-fit component intermittently disengages from the teeth of the first drive gear. This releases the restriction between the first drive gear and the shaft, allowing the driving force generated by the drive motor of the drive assembly to be transmitted to the first drive gear, causing it to rotate relative to the shaft. This ensures the drive motor of the drive assembly can still operate normally, preventing it from burning out. By designing the press-fit component and pressing it against the first drive gear to restrict its rotation relative to the shaft, the normal oscillation function of the desktop fan under normal conditions is guaranteed. Attached Figure Description

[0009] 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 these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of a desktop fan in one embodiment of this application;

[0011] Figure 2 This is a partially exploded structural diagram of the support base in one embodiment of this application;

[0012] Figure 3 This is an exploded structural diagram of the support base in one embodiment of this application;

[0013] Figure 4 for Figure 3 A structural diagram from another perspective;

[0014] Figure 5 This is a cross-sectional structural diagram of the support base in one embodiment of this application;

[0015] Figure 6 for Figure 5 Enlarged structural diagram at point A;

[0016] Figure 7 This is a schematic diagram of the structure of the connecting seat, the pressing member, the first drive gear, and the second drive gear in one embodiment of this application.

[0017] Figure 8 This is a schematic diagram of the upper housing and connecting seat in one embodiment of this application.

[0018] Reference numerals: 1. Desktop fan; 10. Fan head; 20. Support base; 21. Base; 211. Outer shell; 2111. Upper shell; 2111a. Recess; 2111b. Main shell; 2111c. Enclosure; 2111d. Through hole; 2111e. Another through hole; 2112. Lower shell; 212. Drive assembly; 2121. First drive gear; 2122. Second drive gear; 2123. Drive motor; 21 3. Ball bearing; 214. Another ball bearing; 215. Extension; 22. Support structure; 23. Connecting structure; 231. Connecting seat; 2311. Rotating disk; 2311a. Arc-shaped through hole; 232. Rotating shaft; 233. Press-fit part; 2331. Bending part; 2332. Protrusion; 2333. Snap-fit ​​part; 2334. L-shaped connecting part; 234. Snap-fit ​​enclosure; 2341. C-shaped enclosure; 2342. Stop enclosure. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] like Figures 1-6 As shown, this application embodiment provides a desktop fan 1, which can effectively prevent the fan head 10 of the desktop fan 1 from failing to rotate normally when blocked by human or external obstacles, thus causing the drive motor 2123 of the drive assembly 212 to burn out.

[0021] The desktop fan 1 includes a fan head 10 and a support base 20. The support base 20 includes a base 21 and a support structure 22 connected between the base 21 and the fan head 10. The base 21 and the support structure 22 are rotatably connected by a connecting structure 23. The base 21 includes a housing 211 and a drive assembly 212 mounted on the housing 211. The drive assembly 212 drives the support structure 22 to rotate in the vertical direction via the drive connecting structure 23, so that the fan head 10 rotates in the vertical direction relative to the base 21, thereby achieving oscillation of the fan head 10. The connecting structure 23 includes a connecting seat 231 and a rotating shaft 232 fixedly connected to the connecting seat 231. The support structure 22 is connected to the connecting seat 231. The driving assembly 212 includes a first driving gear 2121, which is sleeved on the rotating shaft 232 and rotatably connected to the rotating shaft 232. The connecting structure 23 also includes a pressing member 233 connected to the connecting seat 231. The pressing member 233 is located on the first side of the rotating shaft 232 and is pressed against the first driving gear 2121.

[0022] The following combination Figures 1-8 The specific structure of desktop fan 1 will be described in detail.

[0023] like Figures 1-6 As shown, the desktop fan 1 includes a fan head 10 and a support base 20.

[0024] The fan head 10 serves as the fan head of the desktop fan 1, used to accelerate airflow to create airflow. Since the fan head 10 is not the focus of this application, its specific structure will not be described in detail here.

[0025] The support base 20 serves as the main base of the desktop fan 1. The support base 20 is connected to the fan head 10 and is used to support the fan head 10.

[0026] The support base 20 includes a base 21, a support structure 22, and a connecting structure 23.

[0027] The base 21 serves as the support for the base 20 and provides support for the support structure 22 and the connecting structure 23.

[0028] The support structure 22 serves as a bracket for the support base 20, and is used to connect to and support the fan head 10. Since the support structure 22 is not the focus of this application, its specific structure will not be described in detail here.

[0029] The connecting structure 23 serves as a rotating component supporting the base 20, enabling relative rotation between the supporting structure 22 and the base 21.

[0030] The support structure 22 is connected between the base 21 and the fan head 10, and the base 21 and the support structure 22 are rotatably connected through the connecting structure 23. That is, one end of the support structure 22 is connected to the fan head 10, and the other end of the support structure 22 is rotatably connected to the base 21 through the connecting structure 23. The specific connection method between the support structure 22 and the fan head 10 (or the connecting structure 23) is not limited here, and the designer can make reasonable designs according to actual needs; for example, the support structure 22 can be detachably connected to the fan head 10 (or the connecting structure 23) by at least one of the following methods: screw connection, snap connection, or plug connection; or, for example, the support structure 22 can be non-detachably connected to the fan head 10 (or the connecting structure 23) by the following methods: adhesive connection, riveting, etc.

[0031] The base 21 includes a housing 211 and a drive assembly 212.

[0032] The outer shell 211 serves as the housing of the base 21. The specific material used to manufacture the outer shell 211 is not limited here. Designers can make reasonable choices according to actual needs. For example, the material used to manufacture the outer shell 211 can be, but is not limited to, plastic, silicone, or rubber. The specific shape of the outer shell 211 is not limited here. Designers can make reasonable designs according to actual needs. For example, the outer contour of the outer shell 211 can be, but is not limited to, a circle or a rectangle.

[0033] The drive assembly 212, serving as the power source for the base 21, generates the driving force to rotate the connecting structure 23 in the vertical direction. The drive assembly 212 is mounted on the housing 211. The drive assembly 212 drives the support structure 22 to rotate in the vertical direction via the connecting structure 23, causing the fan head 10 to rotate relative to the base 21 in the vertical direction, thus achieving the oscillation function of the fan head 10. The drive assembly 212 also drives the connected connecting structure 23 to rotate in the vertical direction, causing the connecting structure 23 to drive the support structure 22 and the fan head 10 to rotate relative to the base 21 in the vertical direction, thereby achieving the oscillation function of the desktop fan 1.

[0034] The connecting structure 23 includes a connecting seat 231 and a rotating shaft 232. The connecting seat 231 is used to support and connect the support structure 22, and the rotating shaft 232 is fixedly connected to the connecting seat 231.

[0035] The drive assembly 212 includes a first drive gear 2121, which is sleeved on the rotating shaft 232 and rotatably connected to the rotating shaft 232.

[0036] like Figures 1-6 As shown, the drive assembly 212 also includes a drive motor 2123 and a second drive gear 2122. The drive motor 2123 is installed inside the housing 211, and the motor shaft of the drive motor 2123 is connected to the second drive gear 2122. The second drive gear 2122 meshes with the first drive gear 2121. It should be noted that in related technologies, since the first drive gear 2121 is coaxially and fixedly connected to the rotating shaft 232, when the fan head 10 of the desktop fan 1 cannot rotate normally due to human obstruction or external obstacles, the fixed connection between the first drive gear 2121 and the rotating shaft 232 prevents the first drive gear 2121 from rotating relative to the rotating shaft 232. The inability of the first drive gear 2121 to rotate causes the meshing second drive gear 2122 to be unable to rotate, which in turn prevents the motor shaft of the drive motor 2123 from rotating normally, thus causing the drive motor 2123 to burn out.

[0037] The connecting structure 23 also includes a crimping member 233, which is connected to the connecting seat 231. The specific connection method between the crimping member 233 and the connecting seat 231 is not limited here; designers can design it reasonably according to actual needs. For example, the crimping member 233 can be fixedly connected to the connecting seat 231 by at least one of the following methods: screw connection, snap-fit ​​connection, or plug-in connection. Alternatively, the crimping member 233 can also be non-removably fixedly connected to the connecting seat 231 by, but not limited to, adhesive bonding, riveting, injection molding, or 3D printing.

[0038] The crimping member 233 is located on the first side of the rotating shaft 232 and is crimped with the first drive gear 2121. It should be noted that the rotation of the motor shaft of the drive motor 2123 drives the second drive gear 2122, which is fixedly connected to it, to rotate. The rotation of the second drive gear 2122 will transmit the driving force to the first drive gear 2121, which is meshed with it. Since the crimping member 233 crimps the first drive gear 2121, the crimping member 233 can restrict the rotation of the first drive gear 2121 relative to the rotating shaft 232. Therefore, under the action of the crimping member 233, the first drive gear 2121 will transmit the driving force to the connecting seat 231, so that the connecting seat 231 drives the rotating shaft 232, which is fixedly connected to it, to rotate together with it relative to the base 21. This ensures that the fan head 1 of the desktop fan 1 has the normal oscillation function under normal conditions.

[0039] Based on the desktop fan 1 of this application, by designing a crimping member 233 and allowing the first drive gear 2121 to be movably connected to the rotating shaft 232, when the fan head 10 of the desktop fan 1 cannot rotate normally due to human obstruction or external obstacles, the crimping member 233 will intermittently disengage from the teeth of the first drive gear 2121. The restriction between the first drive gear 2121 and the rotating shaft 232 is released, allowing the driving force generated by the drive motor 2123 of the drive assembly 212 to be transmitted to the first drive gear 2121, causing the first drive gear 2121 to rotate relative to the rotating shaft 232. This ensures that the drive motor 2123 of the drive assembly 212 can still work normally, thus preventing the drive motor 2123 of the drive assembly 2122 from burning out. By designing the crimping member 233, which crimps the first drive gear 2121, the rotation of the first drive gear 2121 relative to the rotating shaft 232 is restricted, thereby ensuring the normal oscillation function of the fan head 10 of the desktop fan 1 under normal conditions.

[0040] like Figure 7As shown, the crimping member 233 includes a bent portion 2331 and a protrusion 2332. The bent portion 2331 is bent towards the side opposite to the first drive gear 2121, and the protrusion 2332 is disposed on the side of the bent portion 2331 facing the first drive gear 2121, and the protrusion 2332 meshes with the teeth of the first drive gear 2121. The protrusion 2332 can be detachably connected to the bent portion 2331 by at least one of the following methods, including but not limited to screwing, plugging, or snap-fitting. Alternatively, the protrusion 2332 can be non-detachably connected to the bent portion 2331 by means of adhesive bonding, injection molding, or 3D printing, but not limited to these methods. By designing the bending part 2331, the bending is directed away from the first drive gear 2121, forming an arc-shaped structure to match the outer contour of the first drive gear 2121. This makes the arrangement of the pressing part 233 with the first drive gear 2121 more compact in spatial structure, reducing the volume of the base 21 and thus achieving a miniaturized design of the desktop fan 1. By designing the protrusion 2332, which is equivalent to a retaining tooth for meshing with the teeth of the first drive gear 2121, the rotation of the first drive gear 2121 relative to the rotating shaft 232 is restricted, thereby ensuring the normal oscillation function of the fan head 10 of the desktop fan 1 under normal conditions. When the fan head 10 of the desktop fan 1 cannot rotate normally due to human obstruction or external obstacles, the bent portion 2331 will deform, causing the protrusion 2332 to intermittently disengage from the teeth of the first drive gear 2121. This releases the restriction between the first drive gear 2121 and the rotating shaft 232, allowing the driving force generated by the drive motor 2123 of the drive assembly 212 to be transmitted to the first drive gear 2121, causing the first drive gear 2121 to rotate relative to the rotating shaft 232. This ensures that the drive motor 2123 of the drive assembly 212 can still operate normally, preventing the drive motor 2123 of the drive assembly 212 from burning out. It should be noted that during the intermittent disengagement of the protrusion 2332 from the teeth of the first drive gear 2121, the collision between the protrusion 2332 and the teeth of the first drive gear 2121 will produce a "ticking" sound. Users can use this sound to determine that the fan head 10 of the desktop fan 1 is in an abnormal oscillation state and take appropriate measures.

[0041] like Figure 7As shown, the crimping component 233 also includes two snap-fit ​​portions 2333, which are respectively connected to both sides of the bent portion 2331 along its length. The connecting seat 231 has two snap-fit ​​enclosures 234 corresponding to the two snap-fit ​​portions 2333, and the two snap-fit ​​portions 2333 and the two snap-fit ​​enclosures 234 are snapped together one-to-one. The two snap-fit ​​portions 2333 can be detachably connected to the bent portion 2331 by at least one of the following methods, including but not limited to screwing, snap-fitting, or plugging; or they can be non-detachably connected to the bent portion 2331 by means of adhesive bonding, riveting, injection molding, or 3D printing. The two snap-fit ​​enclosures 234 can be detachably connected to the connecting seat 231 by at least one of the following methods, including but not limited to screwing, snap-fitting, or plugging; or they can be non-detachably connected to the connecting seat 231 by means of adhesive bonding, riveting, injection molding, or 3D printing. By designing two snap-fit ​​parts 2333 on both sides of the length direction of the bent part 2331, and designing two snap-fit ​​enclosures 234 on the connecting seat 231 corresponding to the two snap-fit ​​parts 2333, the two snap-fit ​​parts 2333 and the two snap-fit ​​enclosures 234 are snapped in a one-to-one correspondence, so that the pressing member 233 and the connecting seat 231 form a two-point fixing method with uniform force, which can enhance the connection stability between the pressing member 233 and the connecting seat 231, thereby ensuring the effective pressing of the pressing member 233 on the first drive gear 2121.

[0042] Specifically, each snap-fit ​​enclosure 234 includes an inverted U-shaped enclosure 2341 connected to the connecting seat 231 and a stop enclosure 2342. The openings of the inverted U-shaped enclosures 2341 of the two snap-fit ​​enclosures 234 are arranged facing each other, and the stop enclosures 2342 of the two snap-fit ​​enclosures 234 are connected to the edge of the corresponding inverted U-shaped enclosure 2341 near the opening. The inverted U-shaped enclosure 2341 and the stop enclosure 2342 can be, but are not limited to, formed into an integral structure by injection molding or 3D printing. By designing the U-shaped enclosure 2341, which largely surrounds the snap-fit ​​portion 2333, the connection stability between the crimping member 233 and the connecting seat 231 is effectively enhanced, thus ensuring that the crimping member 233 effectively crimps the first drive gear 2121. By designing the stop enclosure 2342, which is located at the opening edge of the U-shaped enclosure 2341, the stop enclosure 2342 limits the snap-fit ​​portion 2333, further enhancing the connection stability between the crimping member 233 and the connecting seat 231, thus further ensuring that the crimping member 233 effectively crimps the first drive gear 2121.

[0043] like Figure 7As shown, the bent portion 2331 is closer to the rotation center of the first drive gear 2121 than the snap-fit ​​portion 2333. The crimping member 233 also includes two L-shaped connecting portions 2334. The short side of one L-shaped connecting portion 2334 is connected to the first end of the bent portion 2331, and the long side of the other L-shaped connecting portion 2334 is connected to the snap-fit ​​portion 2333 located on the side where the first end of the bent portion 2331 is located. The short side of the other L-shaped connecting portion 2334 is connected to the second end of the bent portion 2331, and the long side of the other L-shaped connecting portion 2334 is connected to the snap-fit ​​portion 2333 located on the side where the second end of the bent portion 2331 is located. The L-shaped connecting part 2334 can be detachably connected to the bent part 2331 (or the snap-fit ​​part 2333) by at least one of the following methods: screwing, snap-fitting, or plugging. Alternatively, the L-shaped connecting part 2334 can be non-detachably connected to the bent part 2331 (or the snap-fit ​​part 2333) by means of gluing, riveting, injection molding, or 3D printing. By designing the L-shaped connecting part 2334, the snap-fit ​​part 2333 is connected to the bent part 2331, thus providing sufficient rotational space for the first drive gear 2121. This ensures smooth rotation of the first drive gear 2121 relative to the rotating shaft 232 when the fan head 10 of the desktop fan 1 cannot rotate normally due to human obstruction or external obstacles. By designing the L-shaped connecting part 2334, which forms a spring arm structure with the bent part 2331, the bent part 2331 can generate a suitable amount of elastic deformation when the fan head 10 of the desktop fan 1 cannot rotate normally. This ensures that the protrusion 2332 intermittently disengages from the teeth of the first drive gear 2121, releasing the restriction between the first drive gear 2121 and the rotating shaft 232. The driving force generated by the drive motor 2123 of the drive assembly 212 can be transmitted to the first drive gear 2121, causing the first drive gear 2121 to rotate relative to the rotating shaft 232. This ensures that the drive motor 2123 of the drive assembly 212 can still work normally, thus preventing the drive motor 2123 of the drive assembly 212 from burning out. It is worth mentioning that the L-shaped connecting part 2334 buffers and transitions the stress originally concentrated at the junction of the bent part 2331 and the snap-fit ​​part 2333, effectively avoiding stress concentration and reducing the risk of breakage.

[0044] like Figure 3 and Figure 7 As shown, the outer casing 211 has a groove 2111a on the side facing the fan head 10, and the connecting seat 231 is located in the groove 2111a and is rotatably connected to the outer casing 211 via a rotating shaft 232. By designing the groove 2111a on the side of the outer casing 211 facing the fan head 10, the connecting seat 231 can be accommodated in the groove 2111a, thus facilitating the assembly between the connecting seat 231 and the outer casing 211.

[0045] Specifically, the connecting seat 231 includes a rotating disk 2311 rotatably connected to the outer casing 211 via a rotating shaft 232. The aforementioned pressing member 233 is disposed on the rotating disk 2311. The rotating disk 2311 is connected to the support structure 22. The rotating disk 2311 has an arc-shaped through hole 2311a, which is located on the second side of the rotating shaft 232 and is opposite to the first side. The bottom wall of the groove 2111a has a through hole 2111d that communicates with the cavity of the outer casing 211 and corresponds to the arc-shaped through hole 2311a. The motor shaft of the aforementioned drive motor 2123 passes through the through hole and the arc-shaped through hole 2311a in sequence and is connected to the second drive gear 2122. The specific connection method between the drive motor 2123 and the housing 211 is not limited here, and designers can design it reasonably according to actual needs. For example, the drive motor 2123 can be detachably connected to the housing 211 by at least one of the following methods: screw connection, snap connection, or plug connection. Alternatively, the drive motor 2123 can be non-detachably connected to the housing 211 by adhesive bonding or riveting. The arc of the central angle corresponding to the arc-shaped through hole 2311a matches the maximum oscillation angle of the desktop fan 1, allowing the connecting seat 231 to rotate relative to the housing 2111 within a set angle range, thus meeting the oscillation requirements of the desktop fan 1. In this design, the rotating disk 2311 is rotatably connected to the housing 211 via the rotating shaft 232. By designing the arc-shaped through hole 2311a on the second side of the first drive gear 2121 on the rotating disk 2311, the design of the arc-shaped through hole 2311a provides sufficient clearance for the rotation of the rotating disk 2311, ensuring the normal rotation of the rotating disk 2311. The motor shaft of the drive motor 2123 rotates to drive the second drive gear 2122 connected to it to rotate. The rotation of the second drive gear 2122 transmits the driving force to the first drive gear 2121 that is meshed with it. Under the action of the pressing member 233, the first drive gear 2121 transmits the driving force to the rotating disk 2311, causing the rotating disk 2311 to drive the rotating shaft 232 fixedly connected to it to rotate relative to the outer shell 211. The rotation of the rotating disk 2311 drives the support structure 22 connected to it to rotate in the vertical direction. The rotation of the support structure 22 drives the fan head 10 connected to it to rotate in the vertical direction, thereby realizing the oscillation function of the desktop fan 1.

[0046] like Figure 3 and Figure 4As shown, the outer casing 211 includes an upper casing 2111 and a lower casing 2112. The upper casing 2111 and the lower casing 2112 are connected and enclose a cavity for accommodating a drive motor 2123. The drive motor 2123 is detachably connected to at least one of the upper casing 2111 and the lower casing 2112. The upper casing 2111 has the aforementioned groove 2111a. The detachable fixed connection between the upper casing 2111 and the lower casing 2112 can be achieved by at least one of the following methods, but is not limited to: screw connection, snap-fit ​​connection, or plug-in connection. The drive motor 2123 can be detachably connected to the upper casing 2111 alone, but is not limited to: by screwing, and can also be detachably connected to the lower casing 2112 alone, but is not limited to: by screwing, and can also be detachably connected to both the upper casing 2111 and the lower casing 2112, but is not limited to: by screwing. By designing a detachable connection between the upper housing 2111 and the lower housing 2112, and a detachable drive motor 2123, it is easy to disassemble and reassemble later, enabling effective replacement of damaged components such as the drive motor 2123, the first drive gear 2121, or the second drive gear 2122.

[0047] Specifically, such as Figure 8 As shown, the upper housing 2111 includes a main housing 2111b with the aforementioned groove 2111a, and a surrounding wall 2111c connected to the side of the main housing 2111b opposite to the groove 2111a. The bottom wall of the groove 2111a, corresponding to the area of ​​the surrounding wall 2111c, has another through hole 2111e. The base 21 also includes a ball bearing 213, and a rotating shaft 232 passes through the other through hole 2111e and is connected to the surrounding wall 2111c via the ball bearing 213. The inner ring of the ball bearing 213 is fixedly connected to the rotating shaft 232, and the outer ring of the ball bearing 213 is fixedly connected to the surrounding wall 2111c. By designing the ball bearing 213, the rotating shaft 232 is rotatably connected to the surrounding wall 2111c of the upper housing 2111 via the ball bearing 213, achieving a rotatable connection between the connecting seat 231 and the upper housing 2111. The structure is simple and easy to implement.

[0048] Specifically, the base 21 also includes another ball bearing 214, which is further away from the groove of the groove 2111a than the ball bearing 213; the base 21 also includes an extension 215, which is fixedly connected to one end of the rotating shaft 232 away from the groove of the groove 2111a, and the extension 215 is connected to the enclosure wall 2111c through the other ball bearing 214.

[0049] The extension 215 and the rotating shaft 232 form an inner and outer nested structure. For example, when the extension 215 is a hollow sleeve structure, the rotating shaft 232 is a solid rod structure, and the extension 215 is sleeved on the end of the rotating shaft 232. For another example, when the extension 215 is a solid rod structure, the rotating shaft 232 is a hollow cylinder structure, and the end of the rotating shaft 232 is sleeved on the extension 215.

[0050] The connection between the extension member 215 and the rotating shaft 232 can be either detachable or non-detachable to accommodate different assembly and maintenance needs. For example, when the connection between the extension member 215 and the rotating shaft 232 is detachable, the extension member 215 can be assembled with the rotating shaft 232 via a threaded connection. In this case, the base 21 also includes a screw, which passes through the extension member 215 and is threadedly connected to the rotating shaft 232 to fix the extension member 215 to the rotating shaft 232. Alternatively, the extension member 215 can be assembled with the rotating shaft 232 via a snap-fit ​​connection. In this case, the base 21 also includes a locking pin, which passes through the extension member 215 and is snap-fitted to the rotating shaft 232 to fix the extension member 215 to the rotating shaft 232. Finally, the extension member 215 can be assembled with the rotating shaft 232 via a plug-in connection. In this case, the base 21 also includes a pin, which passes through the extension member 215 and is plugged into the rotating shaft 232 to fix the extension member 215 to the rotating shaft 232. For example, when the extension 215 and the pivot 232 are non-detachable, the extension 215 can be fixedly connected to the pivot 232 by means of gluing, riveting, injection molding or 3D printing, but not limited to gluing, riveting, injection molding or 3D printing.

[0051] The inner ring of another ball bearing 214 is fixedly connected to the extension 215, and the outer ring of another ball bearing 214 is fixedly connected to the enclosure 2111c. The extension 215 is used to extend the structural length of the rotating shaft 232, and the extension 215 is connected to the enclosure 2111c through another ball bearing 214. This achieves a double connection between the rotating shaft 232 and the enclosure 2111c, which can further improve the connection stability between the rotating shaft 232 and the enclosure 2111c, and ensure the smooth rotation of the connecting seat 231 in the vertical direction.

[0052] The inner and outer sides of the enclosure 2111c are equipped with several vertical reinforcing ribs. This double-sided reinforcing rib design not only enhances the bending stiffness and compressive strength of the enclosure 2111c, but also effectively withstands the combined axial and radial loads when the shaft 232 rotates at high speed or encounters sudden impact loads (such as the reaction force at the moment the fan is switched on and off), preventing the enclosure 2111c from deforming, cracking, or failing. Furthermore, by limiting the rotational behavior of the shaft 232 to the vertical degree of freedom through the enclosure 2111c, non-axial oscillation or eccentric rotation of the shaft 232 is avoided, effectively improving the rotational stability of the shaft 232. This, in turn, improves the smoothness of the oscillation function of the desktop fan 1, reduces operating noise, and extends the lifespan of the desktop fan 1.

[0053] 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," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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 accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0054] The above description is merely a preferred embodiment of this application and is 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 desktop fan, characterized in that, include: Fan head; and A support base is provided, connecting to and supporting the fan head. The support base includes a base and a support structure connected between the base and the fan head. The base and the support structure are rotatably connected via a connecting structure. The base includes a housing and a drive assembly mounted on the housing. The drive assembly drives the connecting structure to rotate the support structure in a vertical direction, causing the fan head to rotate relative to the base in the vertical direction, thereby achieving oscillation of the fan head. The connecting structure includes a connecting seat and a rotating shaft fixedly connected to the connecting seat. The support structure is connected to the connecting seat. The drive assembly includes a first drive gear, which is sleeved on the rotating shaft and rotatably connected to it. The connecting structure also includes a pressing member connected to the connecting seat, located on a first side of the rotating shaft and pressing against the first drive gear.

2. The desktop fan as described in claim 1, characterized in that, The crimping member includes a bent portion and a protrusion. The bent portion is bent toward the side opposite to the first drive gear, and the protrusion is disposed on the side of the bent portion facing the first drive gear, and the protrusion meshes with the teeth of the first drive gear.

3. The desktop fan as described in claim 2, characterized in that, The crimping component further includes two snap-fit ​​parts, which are respectively connected to both sides of the bending part along its length; the connecting seat is provided with two snap-fit ​​enclosures corresponding to the two snap-fit ​​parts, and the two snap-fit ​​parts and the two snap-fit ​​enclosures are snapped together one by one.

4. The desktop fan as described in claim 3, characterized in that, Each of the snap-fit ​​enclosures includes an inverted U-shaped enclosure and a stop enclosure connected to the connecting seat. The openings of the inverted U-shaped enclosures of the two snap-fit ​​enclosures are arranged facing each other, and the stop enclosures of the two snap-fit ​​enclosures are connected to the edge of the corresponding inverted U-shaped enclosure near the opening.

5. The desktop fan as described in claim 3, characterized in that, The bent portion is closer to the rotation center of the first drive gear than the snap-fit ​​portion; the pressing member also includes two L-shaped connecting portions, one of which has its short side end connected to the first end of the bent portion, and the other of which has its long side end connected to the snap-fit ​​portion located on the side where the first end of the bent portion is located; the other of which has its short side end connected to the second end of the bent portion, and the other of which has its long side end connected to the snap-fit ​​portion located on the side where the second end of the bent portion is located.

6. The desktop fan as described in any one of claims 1-5, characterized in that, The outer casing has a groove on the side facing the fan head, and the connecting seat is located in the groove and is rotatably connected to the outer casing through the rotating shaft.

7. The desktop fan as described in claim 6, characterized in that, The connecting seat includes a rotating disk rotatably connected to the outer shell via the rotating shaft, the pressing member is disposed on the rotating disk, the rotating disk is connected to the support structure, the rotating disk is provided with an arc-shaped through hole, the arc-shaped through hole is located on the second side of the rotating shaft, and the second side is disposed opposite to the first side; the bottom wall of the groove is provided with a through hole communicating with the cavity of the outer shell and corresponding to the arc-shaped through hole; The drive assembly further includes a drive motor and a second drive gear. The drive motor is installed inside the housing. The motor shaft of the drive motor passes through the through hole and the arc-shaped through hole in sequence and is connected to the second drive gear. The second drive gear meshes with the first drive gear.

8. The desktop fan as described in claim 7, characterized in that, The housing includes an upper housing and a lower housing, the upper housing and the lower housing are connected and enclosed to form the cavity for accommodating the drive motor, the drive motor is detachably connected to at least one of the upper housing and the lower housing, and the upper housing has the groove.

9. The desktop fan as described in claim 8, characterized in that, The upper housing includes a main shell having the groove and a surrounding wall connected to the side of the main shell opposite to the groove opening. The bottom wall of the groove has another through hole corresponding to the area of ​​the surrounding wall. The base also includes a ball bearing. The rotating shaft passes through the other through hole and is connected to the surrounding wall through the ball bearing.

10. The desktop fan as described in claim 9, characterized in that, The base also includes another ball bearing, which is further away from the groove opening than the ball bearing. The base also includes an extension member, which is fixedly connected to one end of the rotating shaft away from the groove opening, and the extension member is connected to the enclosure wall via the other ball bearing.

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