Quick-removal fan unit

Abstract

To provide a quick-release fan device that facilitates effective cleaning of the guard. [Solution] A quick-detach fan device includes a head (100) and a guard structure connected to the head. The head includes a drive motor (101) with a first connecting structure (600) at its output end. The guard structure includes a front guard (201), a rear guard (202), and a blade connecting shaft (203). The front and rear guards are detachably connected via a first rotational engagement structure, and the rear guard and the fan head are detachably connected via a second rotational engagement structure. The blade connecting shaft is rotatably connected to the rear guard, and the blade connecting shaft is provided with a second connecting structure (500). The second connecting structure and the first connecting structure are inserted into each other and connect and transmit power. This not only facilitates quick removal of the guard structure itself, but also enables quick removal of the guard structure and the fan head, making it easy for users to thoroughly clean the guard structure.

Description

[Technical Field]

[0001] The present invention relates to the field of fan technology, and more particularly to quick-release fan devices. [Background technology]

[0002] In everyday use, removing and cleaning fan guards has always been a challenge for users. Conventional fan guards are typically secured with screws or complex fasteners, requiring users to use tools to remove them, which is cumbersome and can damage the guard or the fan body if not careful. This design makes it difficult for users to easily open the guard, especially when it comes to thoroughly cleaning the inside of the guard. Summary of the Invention [Problem to be solved by the invention]

[0003] The problem solved by this invention is how to achieve quick removal of the guard to facilitate effective cleaning of the guard by the user. [Means for solving the problem]

[0004] To solve the above problems, the present invention provides a quick-detachable fan device, comprising: a head; and a guard structure connected to the head. The head comprises a drive motor having a first coupling structure at its output end. The guard structure comprises a front guard, a rear guard, and a blade connecting shaft. The front guard and the rear guard are detachably connected via a first rotational engagement structure, and the rear guard and the head are detachably connected via a second rotational engagement structure. The blade connecting shaft is rotatably connected to the rear guard, and the blade connecting shaft is provided with a second coupling structure. The second coupling structure and the first coupling structure are inserted into each other and couple to transmit power.

[0005] Optionally, the first rotational engagement structure includes a first locking groove structure and a first locking block, the first locking groove structure being provided on one of the front guard and the rear guard, and the first locking block being provided on the other of the front guard and the rear guard, and the first locking block being adapted to move in and out of the first locking groove structure when the front guard and the rear guard rotate relative to each other.

[0006] Optionally, one of the front guard and the rear guard is provided with a plurality of convex edges, the plurality of convex edges are spaced apart within the same circumference, and the first locking groove structure is provided between adjacent convex edges, and the other of the front guard and the rear guard is provided with a plurality of slide grooves, the plurality of convex edges are provided corresponding to the plurality of slide grooves, and the first locking block is provided between adjacent slide grooves.

[0007] Optionally, the second rotational engagement structure includes a second locking groove structure and a second locking block, the second locking groove structure being provided on one of the rear guard and the head, and the second locking block being provided on the other of the rear guard and the head, and the second locking block being adapted to move in and out of the second locking groove structure when the rear guard and the head rotate relative to each other.

[0008] Optionally, the head includes a mounting plate and a protruding base, the protruding base is protruding from an end surface of the mounting plate along the thickness direction, the second locking groove structure is provided at the boundary between the protruding base and the mounting plate or on a circumferential side wall of the protruding base, a slot communicating with the second locking groove structure is provided on the circumferential side wall of the protruding base, and the second locking block is suitable for passing through the slot to reach the entrance of the second locking groove structure.

[0009] Optionally, a groove is provided on the end surface of the guard structure facing the head, the protruding base is provided in the groove, and the projection of the engagement portion between the second locking block and the second locking groove structure on the groove is located within the contour range of the groove.

[0010] Optionally, one of the first and second connecting structures is a first insertion groove structure, and the cross-sectional shape of the first insertion groove structure is non-circular along a plane perpendicular to the depth direction of the first insertion groove structure, and the other of the first and second connecting structures is an insertion block, and the shape of the insertion block matches the cross-sectional shape of the first insertion groove structure.

[0011] Optionally, the output end of the driving motor is detachably connected to the first coupling structure, and the blade connecting shaft is detachably connected to the second coupling structure.

[0012] Optionally, a second insertion groove structure is provided in one of the first and second connecting structures, and the cross-sectional shape of the second insertion groove structure is non-circular along a plane perpendicular to the depth direction of the second insertion groove structure, and the shape of the other of the first and second connecting structures matches the cross-sectional shape of the second insertion groove structure.

[0013] Optionally, the portion of the first coupling structure or the second coupling structure where the second insertion groove structure is provided is flexible. [Effects of the Invention]

[0014] Compared with the related art, the beneficial effects of the present invention are as follows: The quick-detachment fan device uses the first rotational engagement structure to quickly remove the front and rear guards, allowing users to easily open the guard structure and clean the inside of the guard structure. Furthermore, the cooperation between the first and second coupling structures and the application of the second rotational engagement structure allows for quick removal of both the blade connecting shaft and the drive motor output end, and the rear guard and the head. This structural design not only helps users quickly remove the guard structure itself, but also allows for quick removal of the guard structure and the head, making it easy for users to thoroughly clean the guard structure. This greatly improves the convenience and maintenance efficiency of guard structure cleaning, effectively solving the problem of traditional guard structures being difficult to remove and clean, and improving the user experience. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic exploded view of a quick-release fan assembly according to an embodiment of the present invention; [Figure 2] 1 is a cross-sectional view of a quick-release fan assembly according to an embodiment of the present invention; [Figure 3] FIG. 3 is a partial enlarged view of a portion A in FIG. 2. [Figure 4] 2 is a schematic structural diagram of a front guard according to an embodiment of the present invention; [Figure 5] 2 is a schematic structural view of a rear guard according to an embodiment of the present invention; [Figure 6] 2 is a cross-sectional view of a quick-release fan assembly according to an embodiment of the present invention; [Figure 7] FIG. 7 is a partial enlarged view of a portion B in FIG. 6. [Figure 8] 1 is a schematic structural diagram of a head according to an embodiment of the present invention; [Figure 9] 2 is a schematic structural view of a rear guard according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0016] In order to make the above-mentioned objects, features, and advantages of the present invention clearer and easier to understand, specific embodiments of the present invention will be described in detail below with reference to the drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be realized in various forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are used for illustrative purposes only and are not used to limit the protection scope of the present invention.

[0017] As shown in FIGS. 1 and 2, a quick-detachable fan device according to an embodiment of the present invention includes a head 100 and a guard structure 200 connected to the head 100. The head 100 includes a driving motor 101 having a first connecting structure 600 at its output end. The guard structure 200 includes a front guard 201, a rear guard 202, and a blade connecting shaft 203. The front guard 201 and the rear guard 202 are detachably connected via a first rotational engagement structure 300. The rear guard 202 and the head 100 are detachably connected via a second rotational engagement structure 400. The blade connecting shaft 203 is rotatably connected to the rear guard 202 via a bearing 2023. The blade connecting shaft 203 is provided with a second connecting structure 500. The second connecting structure 500 and the first connecting structure 600 are inserted into each other and coupled to transmit power.

[0018] In this embodiment, the quick-detachment fan device uses the first rotational engagement structure 300 to quickly detach the front guard 201 and the rear guard 202, allowing the user to easily open the guard structure 200 and clean the inside of the guard structure 200. Furthermore, the cooperation between the first connecting structure 600 and the second connecting structure 50 and the application of the second rotational engagement structure 400 enable the user to quickly detach both the blade connecting shaft 203 and the output end of the driving motor 101, and the rear guard 202 and the head 100. The above structural design not only helps the user quickly detach the guard structure 200 itself, but also enables the user to quickly detach the guard structure 200 and the head 100, making it easy for the user to thoroughly clean the guard structure 200. This greatly improves the convenience and maintenance efficiency of cleaning the guard structure 200, effectively solving the problem of the difficulty of removing and cleaning the conventional guard structure 200, and improving the user experience.

[0019] Optionally, as shown in FIG. 3, the first rotation engagement structure 300 includes a first locking groove structure 301 and a first locking block 302, wherein the first locking groove structure 301 is provided on one of the front guard 201 and the rear guard 202, and the first locking block 302 is provided on the other of the front guard 201 and the rear guard 202, and when the front guard 201 and the rear guard 202 rotate relative to each other, the first locking block 302 is suitable for entering and exiting the first locking groove structure 301.

[0020] In addition, to allow the first locking block 302 to smoothly enter the first locking groove structure 301, the first locking groove structure 301 has an escape port communicating with the entrance of the first locking groove structure 301 to allow the first locking block 302 to escape, or the first locking block 302 has an escape groove to allow the inner wall of the first locking groove structure 301 to escape.

[0021] In this optional embodiment, the first rotation engagement structure 300, through cooperation of the first locking groove structure 301 and the first locking block 302, can quickly engage and disengage the front guard 201 and the rear guard 202 when they rotate relative to each other. This design allows for quick removal of the guard structure 200, allowing users to easily open the guard without tools, facilitating cleaning of the inside of the guard, greatly improving cleaning efficiency and user experience.

[0022] Optionally, one of the front guard 201 and the rear guard 202 is provided with a plurality of convex edges 2011, which are spaced apart within the same circumference, with a first locking groove structure 301 provided between adjacent convex edges 2011, and the other of the front guard 201 and the rear guard 202 is provided with a plurality of slide grooves 2022, which are arranged corresponding to the plurality of slide grooves 2022, with a first locking block 302 provided between adjacent slide grooves 2022.

[0023] Specifically, the number of the ridges 2011 may be two, three, four, etc., and is not limited here and can be determined according to actual needs. Here, as shown in Fig. 4, the ridges 2011 are arcs and are provided on the inner side of the edge of the front guard 201, and a plurality of the ridges 2011 are provided at intervals on the same circumference, and a first locking groove structure 301 formed by being surrounded by a plurality of plate units is provided between adjacent ridges 2011, and the first locking groove structure 301 has a first locking groove for receiving a part of the first locking block 302 and allowing the other part of the first locking block 302 to smoothly enter the inside of the first locking groove structure 301. An escape port is provided which communicates with the inside of the groove structure 301. As shown in FIG. 5 , the rear guard 202 is provided with a plurality of slide grooves 2022, a plurality of protrusions 2011 are provided corresponding to the plurality of slide grooves 2022 and can slide within the slide grooves 2022, and a first locking block 302 is provided between adjacent slide grooves 2022. When the protrusions 2011 slide within the corresponding slide grooves 2022, the first locking block 302 can enter and exit the first locking groove structure 301.

[0024] In this optional embodiment, when assembling the front guard 201 and the rear guard 202, the plurality of protrusions 2011 are first inserted into the corresponding slide grooves 2022. At this time, the first locking block 302 is not yet inserted into the first locking groove structure 301, and the entrance of the first locking groove structure 301 is located in the rotation path of the first locking block 302. Then, the front guard 201 and the rear guard 202 are rotated relative to each other until the first locking block 302 is located in the first locking groove structure 301, thereby achieving engagement.

[0025] Optionally, as shown in Figures 6 and 7, the second rotation engagement structure 400 includes a second locking groove structure 401 and a second locking block 402, wherein the second locking groove structure 401 is provided on one of the rear guard 202 and the head 100, and the second locking block 402 is provided on the other of the rear guard 202 and the head 100, and the second locking block 402 is suitable for entering and exiting the second locking groove structure 401 when the rear guard 202 and the head 100 rotate relative to each other.

[0026] In addition, in order to allow the second locking block 402 to smoothly enter the second locking groove structure 401, the second locking groove structure 401 has an escape port that communicates with the entrance of the second locking groove structure 401 to allow the second locking block 402 to escape, or the second locking block 402 has an escape groove to allow the inner wall of the second locking groove structure 401 to escape.

[0027] In this alternative embodiment, the second rotational engagement structure 400 can quickly engage and disengage when the front guard 201 and the rear guard 202 rotate relative to each other through cooperation of the second locking groove structure 401 and the second locking block 402. This design allows for quick removal of the guard structure 200, and allows the user to easily separate the guard structure 200 and the head 100 without the need for tools.

[0028] Optionally, the head 100 includes a mounting plate 102 and a protruding base 103, the protruding base 103 being protruding from the end surface of the mounting plate 102 along the thickness direction, the second locking groove structure 401 being provided at the boundary between the protruding base 103 and the mounting plate 102 or on the circumferential side wall of the protruding base 103, the circumferential side wall of the protruding base 103 being provided with a slot 1031 communicating with the second locking groove structure 401, and the second locking block 402 being suitable for passing through the slot 1031 to reach the entrance of the second locking groove structure 401.

[0029] Specifically, as shown in FIG. 8, the protruding base 103 is provided to protrude from the front end surface of the mounting plate 102, and the second locking groove structure 401 is provided at the boundary between the protruding base 103 and the mounting plate 102. The slot 1031 is a U-shaped groove with openings at both ends along the extension direction (the X-axis direction shown in FIG. 8), with the opening at one end communicating with the entrance of the second locking groove structure 401 and the opening at the other end extending to the axial end face of the protruding base 103. In addition, the circumferential side wall of the protruding base 103 of the second locking groove structure 401 is provided with an escape port communicating with the interior of the second locking groove structure 401 to accommodate a part of the second locking block 402 and allow the other part of the second locking block 402 to smoothly enter the interior of the second locking groove structure 401.

[0030] In this optional embodiment, when assembling the guard structure 200 and the head 100, the slot 1031 provides a clear guide path for the second locking block 402 so that the second locking block 402 can smoothly pass through the slot 1031 and reach the entrance of the second locking groove structure 401, thereby achieving alignment between the second locking block 402 and the second locking groove structure 401 and facilitating the second locking block 402 to enter and exit the second locking groove structure 401.

[0031] Optionally, a groove 2021 is provided on the end surface of the guard structure 200 facing the head 100, and the protruding base 103 is provided in the groove 2021, and the projection of the engagement portion between the second locking block 402 and the second locking groove structure 401 on the groove 2021 is located within the contour range of the groove 2021.

[0032] Specifically, as shown in Figures 8 and 9, the convex base 103 and the groove 2021 have matching circular shapes. Before the second locking block 402 enters the second locking groove structure 401, the convex base 103 and the groove 2021 can rotate relative to each other. The second locking block 402 is located at the entrance of the groove 2021, and the projection of the second locking block 402 on the groove 2021 is located within the outline of the groove 2021.

[0033] In this optional embodiment, when assembling the guard structure 200 and the head 100, the concave groove 2021 and the convex base 103 cooperate to achieve initial positioning of both so as to facilitate subsequent rotation of both, and by designing the engagement portion between the second locking block 402 and the second locking groove structure 401 within the contour range of the concave groove 2021, it is easy to align the second locking block 402 with the slot 1031 of the convex base 103.

[0034] Optionally, one of the first connecting structure 600 and the second connecting structure 500 is a first insertion groove structure, and the cross-sectional shape of the first insertion groove structure is non-circular along a plane perpendicular to the depth direction of the first insertion groove structure, and the other of the first connecting structure 600 and the second connecting structure 500 is an insertion block, and the shape of the insertion block matches the cross-sectional shape of the first insertion groove structure.

[0035] In one embodiment, the first coupling structure 600 is a part of the output end of the driving motor 101. Specifically, the first coupling structure 600 is a first insertion groove structure provided at the output end of the driving motor 101. The cross-sectional shape of the first insertion groove structure along a plane perpendicular to the depth direction of the first insertion groove structure (the X-axis direction shown in FIG. 8 ) is non-circular, such as a line shape, a cross shape, an U shape, or a polygonal shape. The second coupling structure 500 is a part of the blade connecting shaft 203. Specifically, the second coupling structure 500 is an insertion block provided on the blade connecting shaft 203. The shape of the insertion block matches the cross-sectional shape of the first insertion groove structure. For example, if the cross-sectional shape of the first insertion groove structure is U-shaped, the shape of the insertion block will also be the corresponding U-shape.

[0036] In this alternative embodiment, the use of a first insertion groove structure with a non-circular cross section and a matching insertion block can ensure reliable positioning when connecting the first coupling structure 600 and the second coupling structure 500, thereby ensuring the stability and reliability of the coupled power transmission. This design also facilitates removal, since the matching shapes of the insertion block and the first insertion groove structure allow them to be easily inserted and removed without the need for complex tools or operations, thereby improving the efficiency of maintenance and part replacement.

[0037] Optionally, the output end of the driving motor 101 is detachably connected to the first coupling structure 600 , and the blade connecting shaft 203 is detachably connected to the second coupling structure 500 .

[0038] In one embodiment, the first connecting structure 600 and the second connecting structure 500 are both single components, wherein the output end of the drive motor 101 is detachably connected to the first connecting structure 600, and the connecting method therebetween includes, but is not limited to, thread connection, screw connection, or engagement, etc.; the blade connecting shaft 203 is detachably connected to the second connecting structure 500, and the connecting method therebetween similarly includes, but is not limited to, thread connection, screw connection, or engagement, etc.

[0039] In this optional embodiment, detachable connections are adopted between the output end of the drive motor 101 and the first coupling structure 600, and between the blade connecting shaft 203 and the second coupling structure 500. In this way, if the first coupling structure 600 or the second coupling structure 500 is damaged or needs to be upgraded, it is not necessary to remove the output shaft of the detachable drive motor 101 and the blade connecting shaft 203, but rather the first coupling structure 600 or the second coupling structure 500 can be replaced separately, which can significantly reduce the amount of maintenance work and the cost of replacing parts.

[0040] Optionally, a second insertion groove structure 601 is provided in one of the first coupling structure 600 and the second coupling structure 500, and the cross-sectional shape of the second insertion groove structure 601 is non-circular along a plane perpendicular to the depth direction of the second insertion groove structure 601, and the shape of the other of the first coupling structure 600 and the second coupling structure 500 matches the cross-sectional shape of the second insertion groove structure 601.

[0041] 8, the first coupling structure 600 has an overall block shape, and the second insertion groove structure 601 is provided on its axial end face, and the cross-sectional shape of the second insertion groove structure 601 along a plane perpendicular to the depth direction of the second insertion groove structure 601 (the X-axis direction shown in FIG. 8) is non-circular, such as a line shape, a cross shape, an U shape, or a polygonal shape. As shown in FIG. 9, the second coupling structure 500 has an overall block shape, and its shape matches the cross-sectional shape of the second insertion groove structure 601. For example, if the cross-sectional shape of the second insertion groove structure 601 is hexagonal, the shape of the second coupling structure 500 is also a matching hexagon.

[0042] In this alternative embodiment, the use of a non-circular cross-section second insertion-groove structure 601 and a matching design for the second coupling structure 500 can ensure reliable positioning when connecting the first coupling structure 600 and the second coupling structure 500, thereby ensuring the stability and reliability of the coupled power transmission. This design also facilitates removal, because the matching shapes of the second coupling structure 500 and the second insertion-groove structure 601 allow them to be easily inserted and removed without the need for complex tools or operations, thereby improving the efficiency of maintenance and part replacement.

[0043] Optionally, the portion of the first coupling structure 600 or the second coupling structure 500 where the second insertion groove structure 601 is provided is flexible.

[0044] Specifically, the portion of the first coupling structure 600 or the second coupling structure 500 where the second insertion groove structure 601 is provided may be made of a flexible material, and a flexible sleeve may be fitted into the portion of the first coupling structure 600 or the second coupling structure 500 where the second insertion groove structure 601 is provided.

[0045] In this optional embodiment, the portion of the first coupling structure 600 or the second coupling structure 500 where the second insertion groove structure 601 is provided is flexible, so that when the first coupling structure 600 or the second coupling structure 500 is assembled with the corresponding connecting member, its own deformation can effectively compensate for problems in cooperation accuracy caused by manufacturing tolerances and installation errors, reducing the difficulty of assembly. In addition, the flexibility can also mitigate vibrations and impacts during operation and reduce wear and noise caused by rigid collisions.

[0046] Although the present invention has been disclosed as above, the scope of protection of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications are included in the scope of protection of the present invention. [Explanation of symbols]

[0047] 100...head, 101...driving motor, 102...mounting plate, 103...protruding base, 1031...slot, 200...guard structure, 201...front guard, 2011...protruding edge, 202...rear guard, 2021...groove, 2022...slide groove, 2023...bearing, 203...blade connecting shaft, 300...first rotation engagement structure, 301...first locking groove structure, 302...first locking block, 400...second rotation engagement structure, 401...second locking groove structure, 402...second locking block, 500...second connecting structure, 600...first connecting structure, 601...second insertion groove structure.

Claims

1. The blade connecting shaft (203) is rotatably connected to the rear guard (202), and the second connecting structure (500) is provided on the blade connecting shaft (203). The first connecting structure (500) is inserted into the first connecting structure (600) and connects the first connecting structure (600) to the blade connecting shaft (203). The blade connecting shaft (203) is rotatably connected to the rear guard (202). The second connecting structure (500) is provided on the blade connecting shaft (203). The second connecting structure (500) and the first connecting structure (600) are inserted into each other and connect and transmit power. A quick-detach fan device.

2. The first rotation engagement structure (300) includes a first locking groove structure (301) and a first locking block (302), wherein the first locking groove structure (301) is provided on one of the front guard (201) and the rear guard (202), and the first locking block (302) is provided on the other of the front guard (201) and the rear guard (202), and when the front guard (201) and the rear guard (202) rotate relative to each other, the first locking block (302) is suitable for entering and exiting the first locking groove structure (301).

2. The quick release fan assembly of claim 1.

3. A protruding edge (2011) is provided on one of the front guard (201) and the rear guard (202), and the first locking groove structure (301) is provided between adjacent protruding edges (2011), and a plurality of slide grooves (2022) are provided on the other of the front guard (201) and the rear guard (202), and the plurality of protruding edges (2011) are provided corresponding to the plurality of slide grooves (2022), and the first locking block (302) is provided between adjacent slide grooves (2022).

3. The quick release fan assembly of claim 2.

4. the second rotation engagement structure (400) includes a second locking groove structure (401) and a second locking block (402), the second locking groove structure (401) is provided on one of the rear guard (202) and the head (100), and the second locking block (402) is provided on the other of the rear guard (202) and the head (100), and the second locking block (402) is suitable for entering and exiting the second locking groove structure (401) when the rear guard (202) and the head (100) rotate relative to each other; 2. The quick release fan assembly of claim 1.

5. The head (100) includes an attachment plate (102) and a protruding base (103), the protruding base (103) is provided on an end surface of the attachment plate (102) along the thickness direction thereof so as to protrude, the second locking groove structure (401) is provided at the boundary between the protruding base (103) and the attachment plate (102) or on a circumferential side wall of the protruding base (103), the circumferential side wall of the protruding base (103) is provided with a slot (1031) communicating with the second locking groove structure (401), and the second locking block (402) is suitable for passing through the slot (1031) to reach the entrance of the second locking groove structure (401).

5. The quick release fan assembly of claim 4.

6. a groove (2021) is provided on the end surface of the guard structure (200) facing the head (100), the protrusion (103) is provided in the groove (2021), and the projection of the engagement portion between the second locking block (402) and the second locking groove structure (401) on the groove (2021) is located within the contour range of the groove (2021); 6. The quick release fan assembly of claim 5.

7. One of the first coupling structure (600) and the second coupling structure (500) is a first insertion groove structure, and the cross-sectional shape of the first insertion groove structure is non-circular along a plane perpendicular to the depth direction of the first insertion groove structure; and the other of the first coupling structure (600) and the second coupling structure (500) is an insertion block, and the shape of the insertion block coincides with the cross-sectional shape of the first insertion groove structure.

2. The quick release fan assembly of claim 1.

8. The output end of the driving motor (101) is detachably connected to the first coupling structure (600), and the blade connecting shaft (203) is detachably connected to the second coupling structure (500).

2. The quick release fan assembly of claim 1.

9. a second insertion groove structure (601) is provided in one of the first coupling structure (600) and the second coupling structure (500), and the cross-sectional shape of the second insertion groove structure (601) is non-circular along a plane perpendicular to the depth direction of the second insertion groove structure (601), and the shape of the other of the first coupling structure (600) and the second coupling structure (500) is consistent with the cross-sectional shape of the second insertion groove structure (601); 9. The quick release fan assembly of claim 8.

10. The portion of the first coupling structure (600) or the second coupling structure (500) where the second insertion groove structure (601) is provided is flexible.

10. The quick release fan assembly of claim 9.

Images