Support assembly and circulation fan

Abstract

This application relates to a support assembly and a circulating fan, belonging to the field of folding technology. The support assembly includes a first connector, a second connector, and a locking mechanism. The second connector is rotatably connected to the first connector. The locking mechanism is disposed at the rotatable connection between the first connector and the second connector. The locking mechanism includes a button and a ratchet. The ratchet is fixed inside the second connector and engages with the button to prevent rotation in one direction. The button passes sequentially through the connection between the first connector and the second connector and can be controlled to separate from the ratchet. This application enables convenient tilt adjustment of the circulating fan, is easy to operate, and has a simplified structure.

Description

Technical Field

[0001] This application relates to the field of folding technology, and in particular to a support assembly and a circulating fan. Background Technology

[0002] As a common ventilation device used in both domestic and industrial settings, the tilt angle adjustment and folding function of the fan head assembly are key concerns for users. Currently, a problem with circulating fans is the inconvenience of tilt angle adjustment. Utility Model Content

[0003] Therefore, it is necessary to provide a support assembly and a circulating fan to address the problem of inconvenient pitch angle adjustment.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] In a first aspect, embodiments of this application provide a support assembly, including:

[0006] First connector;

[0007] The second connector is rotatably connected to the first connector.

[0008] A locking mechanism is provided at the rotatable connection between the first connector and the second connector;

[0009] The locking mechanism includes a button and a ratchet. The ratchet is fixed inside the second connector and engages with the button to prevent rotation in one direction. The button passes through the connection between the first connector and the second connector and can be controlled to separate from the ratchet.

[0010] With the above design, the first connector can be quickly rotated forward or backward, and the locking action of the button and the ratchet can stabilize the working state of the first connector, making it easy to adjust the pitch or fold the first connector for storage.

[0011] In one embodiment of the first aspect, the button has a first toothed surface on the side near the ratchet, and the ratchet has a second toothed surface on the side near the button, the second toothed surface having a tooth groove direction opposite to that of the first toothed surface.

[0012] Through the above design, the button and the ratchet are accurately positioned, and the current state of the first connector can be locked.

[0013] In one embodiment of the first aspect, the locking mechanism further includes an elastic element disposed on the side of the button near the ratchet, with one end connected to the button.

[0014] The above design enables rapid reset of the button, facilitating adjustment and locking of the first connector.

[0015] In one embodiment of the first aspect, the second connector has two limiting grooves opposite each other along the centerline;

[0016] The bracket assembly further includes a first friction plate and a second friction plate, the first friction plate and the second friction plate being respectively installed in a corresponding limiting groove.

[0017] The above design offsets some of the potential energy of the first connector during rotation, reduces the rotational speed of the first connector, and reduces component wear.

[0018] In one embodiment of the first aspect, the second friction plate is fixedly connected to the ratchet.

[0019] The above design facilitates engagement with the button, simplifies the overall structure, and makes it easier to install and position the ratchet.

[0020] In one embodiment of the first aspect, both the first friction plate and the second friction plate are provided with limiting ribs, which are inserted into the limiting grooves.

[0021] With the above design, the limiting rib is inserted into the limiting groove, which facilitates the installation and fixing of the first friction plate and the second friction plate.

[0022] In one embodiment of the first aspect, the support assembly further includes a through-hole and a locking member, wherein the through-hole passes through the first connector and the second connector in sequence and is locked with the locking member so that the first connector can rotate along the axis of the through-hole.

[0023] The above design enables the rotational engagement of the first connector and the second connector, as well as the installation of the first friction plate and the second friction plate.

[0024] In one embodiment of the first aspect, the support assembly further includes a motor and a rotating shaft, the rotating shaft being mounted parallel to the direction of gravity within the second connector, and the output shaft of the motor being connected to the rotating shaft.

[0025] With the above design, under the drive of the motor, the rotating shaft can drive the first connecting piece and the second connecting piece to rotate as a whole, thereby realizing the corresponding head-shaking operation.

[0026] In one embodiment of the first aspect, the second connector has a wiring hole and a first wiring groove, the first wiring groove is located on the side of the second connector away from the locking mechanism, and the wiring hole is located at the end of the first wiring groove near the motor;

[0027] The bracket assembly also includes a cable, one end of which is connected to the motor and passes through the cable hole and the first cable groove in sequence.

[0028] With the above design, when the cable is laid in the first cable tray, the cable has sufficient extension and retraction length as the first connector rotates, and will not cause problems such as knotting due to arbitrary movement.

[0029] Secondly, embodiments of this application also provide a circulating fan, including the support assembly described in any of the above embodiments.

[0030] The above design enables the circulating fan to sweep air up, down, left, and right, making it easy to fold and store, with a simplified overall structure and easy operation.

[0031] Compared to related technologies, the advantages of this application are as follows: This application provides a support assembly and a circulating fan to facilitate tilt adjustment or folding of the circulating fan. The support assembly includes a first connector, a second connector, and a locking mechanism, with the first and second connectors rotatably connected. The locking mechanism includes a button and a ratchet, with the ratchet fixed inside the second connector and engaging with the button to prevent rotation in one direction. Thus, when adjusting the tilt in the direction of the stop, simply pull the button outward to disengage it from the ratchet, allowing the first connector to rotate. Once the set angle is reached, the button resets and engages with the ratchet, stabilizing the current angle of the first connector. When adjusting the tilt in the opposite direction, the first connector can be rotated directly relative to the second connector, and the current rotation angle is maintained by the interaction of the button and the ratchet, achieving convenient tilt adjustment of the circulating fan. The operation is simple and the structure is streamlined. Attached Figure Description

[0032] 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.

[0033] Figure 1 This is a schematic diagram of the opening structure of the support assembly in some embodiments of this application;

[0034] Figure 2 This is a schematic diagram of the folding structure of the bracket assembly in some embodiments of this application;

[0035] Figure 3 This is a schematic diagram of the button structure in some embodiments of this application;

[0036] Figure 4 This is a schematic diagram of the ratchet structure in some embodiments of this application;

[0037] Figure 5 This is an exploded view of the support assembly in some embodiments of this application;

[0038] Figure 6 This is a schematic diagram of the structure of the second connector in some embodiments of this application;

[0039] Figure 7 for Figure 3 The diagram shows an enlarged view of part A.

[0040] Figure 8 This is a schematic diagram of the structure of the first friction plate in some embodiments of this application;

[0041] Figure 9 The following are schematic diagrams of the motor structure in some embodiments of this application;

[0042] Figure 10 This is a schematic diagram of the structure of the rotating shaft in some embodiments of this application;

[0043] Figure 11 This is a schematic diagram of the structure of the first connector in some embodiments of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 100. Bracket assembly; 110. First connector; 111. Second cable routing groove; 120. Second connector; 121. Limiting groove; 122. First cable routing groove; 123. Cable routing hole; 130. Locking mechanism; 131. Button; 1311. First toothed surface; 1312. Handle; 1313. Main body; 132. Ratchet; 1321. Second toothed surface; 133. Elastic element; 140. Second friction plate; 150. Second friction plate; 151. Limiting rib; 160. Motor; 161. Output shaft; 170. Rotating shaft; 171. Shaft hole; 180. Cable; 190. Rotating shaft mechanism; 191. Insert; 192. Locking element; 1100. Cover plate. Detailed Implementation

[0046] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0047] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0048] Furthermore, where the term "and / or" appears, "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0052] Circulating fans are gaining increasing popularity due to their advantages such as more even airflow and energy savings. As a common household or industrial ventilation device, the tilt angle adjustment and folding function of the fan head assembly are key concerns for users. Currently, circulating fans typically adjust the tilt angle manually or through simple mechanical structures. However, these methods have the following problems: adjustment is inconvenient, requiring users to manually rotate or push the adjustment knob, making operation complex and the adjustment process not smooth; the self-locking function is unreliable, as the adjustment mechanism may not lock effectively after adjustment, causing the fan head assembly to shift during use and affecting performance; and the folding function is limited, with some circulating fans requiring additional steps for folding, resulting in inconvenient operation and a poor user experience.

[0053] See Figure 1 and Figure 2 As shown, to improve the above-mentioned problems, the embodiments of this application provide a support assembly 100. It is understood that the support assembly 100 has two states: folded and open. When open, it can adjust the pitch angle and automatically maintain the corresponding working state. The structure is simple and the operation is convenient.

[0054] Specifically, the support assembly 100 includes a first connector 110, a second connector 120, and a locking mechanism 130. The second connector 120 is rotatably connected to the first connector 110 to enable folding and unfolding operations. The locking mechanism 130 is located at the rotatable connection between the first connector 110 and the second connector 120 to maintain the current operating state when the first connector 110 reaches a corresponding adjustment angle.

[0055] Understandably, one of the first connector 110 and the second connector 120 is equipped with a workpiece that needs to be flipped and adjusted, while the other is connected to a support member for fixation, so as to realize the flipping and adjustment operation of the device. For ease of understanding, this application embodiment uses an air supply device as an example for illustration. Specifically, the air supply device is a foldable circulating fan. The first connector 110 is equipped with a fan head assembly, and the second connector 120 is connected to the support assembly to realize the folding and storage of the fan head.

[0056] Continue reading Figure 3 and Figure 4 As shown, the locking mechanism 130 further includes a button 131 and a ratchet 132. The ratchet 132 is fixed inside the second connector 120 and cooperates with the button 131 to prevent rotation in one direction. The button 131 passes through the connection between the first connector 110 and the second connector 120 in sequence and can be controlled to separate from the ratchet 132.

[0057] For example, the first connector 110 can rotate clockwise and counterclockwise relative to the second connector 120. Under the constraint of the button 131 and ratchet 132, when the button 131 and ratchet 132 are locked, the first connector 110 can only rotate in one direction under external force. For instance, when the button 131 and ratchet 132 restrict the first connector 110 from rotating forward, the user can directly rotate the first connector 110 to rotate it backward relative to the second connector 120. When it is necessary to adjust the first connector 110 forward, the button 131 must be pulled outward to separate it from the ratchet 132. Then, the first connector 110 is rotated forward. After reaching the desired angle, the button 131 resets and locks with the ratchet 132, maintaining the current working angle and quickly achieving the pitch adjustment of the first connector 110. When folding and storing, simply rotate the first connector 110 backward until the first connector 110 and the second connector 120 overlap, making the operation simple and improving the user experience.

[0058] Continue reading Figure 3 and Figure 4 As shown, in some embodiments, the button 131 has a first toothed surface 1311 on the side near the ratchet 132, and the ratchet 132 has a second toothed surface 1321 on the side near the button 131. The tooth grooves of the second toothed surface 1321 are opposite to those of the first toothed surface 1311.

[0059] Specifically, the tooth grooves of the first tooth surface 1311 are inclined counterclockwise, and the tooth grooves of the second tooth surface 1321 are inclined clockwise, so that the tooth grooves of the two can mesh after contact and limit the rotation direction of the ratchet 132. The ratchet 132 is installed inside the second connector 120, and the button 131 is installed in the first connector 110, with one end of the first tooth surface 131 passing through the first connector 110 and entering the second connector 120 to mesh with the second tooth surface 1321 of the ratchet 132. When it is necessary to adjust the angle of the first connector 110 forward, the button 131 must first be pulled outward to separate the first tooth surface 1311 from the second tooth surface 1321. At this time, the first connector 110 can rotate arbitrarily. After the user rotates the first connector 110 forward to the desired angle, the button 131 is reset and meshes with the ratchet 132 again, locking the current state of the first connector 110. When the angle of the first connector 110 needs to be adjusted backward, the button 131 cannot lock the current direction with the ratchet 132. Simply pull the first connector 110 backward to make the corresponding angle adjustment, quickly achieving the tilt angle adjustment of the first connector 110. When folding is required, simply rotate the first connector 110 backward until it overlaps with the second connector 120. The entire process requires no additional operation, is precise in positioning, and is self-locking.

[0060] Understandably, due to the meshing structure of the tooth surfaces of the button 131 and the ratchet 132, the first connector 110 can be adjusted in multiple stages according to the number of gears. The current rotation angle is accurately located according to the meshing of each tooth groove of the ratchet 132 with the button 131, and the adjustment angle of the first connector 110 rotating backward is limited according to the number of tooth grooves of the ratchet 132.

[0061] Furthermore, button 131 also includes a handle 1312 and a body 1313. The body 1313 is cylindrical and has a first connector 110 inserted through it. The handle 1312 is located on the outside of the body 1313 to facilitate the user's application of force, separating button 131 from ratchet 132 by pulling the handle 1312. The first tooth surface 1311 is semi-circularly arranged so that after passing through the first connector 110, it enters the second connector 120 and engages with ratchet 132. Since ratchet 132 has a full-tooth structure, the semi-circular first tooth surface 1311 can also engage with the second tooth surface 1321 of ratchet 132 to achieve a locking function.

[0062] Continue reading Figure 5 As shown, in some embodiments, the locking mechanism 130 further includes an elastic element 133, which is disposed on the side of the button 131 near the ratchet 132, and one end is connected to the button 131.

[0063] Specifically, the elastic element 133 can be a helical compression spring, with one end connected to the button 131 and the other end abutting against the second connecting member 120 to achieve the pressing and resetting of the button 131. In the normal state, the elastic element 133 is in a contracted state, pulling the button 131 inwards, so that the button 131 is located within the second connecting member 120 and abuts against the ratchet 132. During the forward adjustment of the rotation of the first connecting member 110, by pulling the button 131 outwards, the elastic element 133 extends, and the first tooth surface 1311 of the button 131 separates from the second tooth surface 1321 of the ratchet 132, allowing the first connecting member 110 to rotate forward relative to the second connecting member 120. After reaching the set angle, under the tension of the elastic element 133, the button 131 resets and re-engages with the ratchet 132 for locking.

[0064] Continue reading Figure 6 As shown, in some embodiments, the second connector 120 has two limiting grooves 121 opposite each other along the centerline. The bracket assembly 100 also includes a first friction plate and a second friction plate 150140, which are respectively installed in a corresponding limiting groove 121.

[0065] For example, the second connector 120 has a connecting piece in the middle, and two limiting grooves 121 are distributed on opposite sides of the connecting piece. The first friction plate and the second friction plate 150140 are disposed opposite each other in the two limiting grooves 121. During the rotation of the first connector 110, the first friction plate and the second friction plate 150140 will provide friction to the first connector 110, counteracting part of the potential energy of the first connector 110 during rotation, reducing the rotational speed of the first connector 110, and reducing component wear.

[0066] Continue reading Figure 7 As shown, in some embodiments, the second friction plate 150140 is fixedly connected to the ratchet 132.

[0067] Specifically, the second friction plate 150140 is integrally formed with the ratchet 132. After the second friction plate 150140 is installed in the limiting groove 121, the ratchet 132 protrudes from the limiting groove 121 to facilitate engagement with the button 131. The overall structure is more streamlined and the installation and positioning of the ratchet 132 is easier.

[0068] Of course, in other embodiments, the second friction plate 150140 can be set separately from the ratchet 132, and the ratchet 132 can be fixed in another fixing groove. This requires adding a groove in the second connector 120, which makes the process more complicated.

[0069] Continue reading Figure 8 As shown, in some embodiments, both the first friction plate and the second friction plate 150140 are provided with limiting ribs 151, which are inserted into the limiting groove 121.

[0070] Specifically, the middle of the limiting rib 151 has a stepped protrusion, thereby forming a flange-shaped limiting rib 151 on the side. The limiting rib 151 is inserted into the limiting groove 121, which facilitates the installation and fixation of the first friction plate and the second friction plate 150140. Furthermore, the ratchet 132 protrudes relative to the second friction plate 150140, so as to be exposed on the side of the limiting groove 121 near the button 131.

[0071] See again Figure 5 As shown, in some embodiments, the bracket assembly 100 further includes a pivot mechanism 190, which passes through the connecting piece of the second connector 120 and the first connector 110 to achieve a rotational engagement between the first connector 110 and the second connector 120.

[0072] Furthermore, the bracket assembly 100 also includes a through-plug 191 and a locking member 192. The through-plug 191 passes through the first connector 110 and the second connector 120 in sequence and is then locked with the locking member 192, so that the first connector 110 can rotate along the axis of the through-plug 191. During installation, the through-plug 191 passes through the first connector 110, the first friction plate, the connecting plate, and the second friction plate 150140 in sequence and is then fixed with the locking member 192, realizing the rotational engagement of the first connector 110 and the second connector 120 and the installation of the first friction plate and the second friction plate 150140.

[0073] See again Figure 7 As shown, in one embodiment, the insert 191 can be a bolt and the locking member 192 can be a nut, so that after the insert 191 passes through the connecting piece and the first connecting member 110, the nut and bolt can be tightened by turning, thus completing the connection between the first connecting member 110 and the second connecting member 120.

[0074] In another embodiment, the insert 191 can also be a pin, and the locking member 192 can be a snap ring. Two snap rings are provided and are respectively locked at both ends of the pin so that the pin is fixed by the snap rings after the insert 191 passes through the connecting piece and the first connecting member 110.

[0075] Continue reading Figure 9 and Figure 10 As shown, in some embodiments, the support assembly 100 further includes a motor 160 and a rotating shaft 170, the rotating shaft 170 being mounted parallel to the direction of gravity within the second connector 120, and the output shaft 161 of the motor 160 being connected to the rotating shaft 170.

[0076] Specifically, the second connector 120 includes a cylindrical portion and a triangular portion, with the tip of the triangular portion away from the cylindrical portion, so that when the first connector 110 is connected to the triangular portion of the second connector 120, there is a sufficient range of rotation. Both the motor 160 and the rotating shaft 170 can be fixed to the cylindrical portion with screws, and the cylindrical portion also has corresponding holes for locking with the screws, and rotatably engages with the support assembly. The rotating shaft 170 has a shaft hole 171 on its upper part, and is connected to the output shaft 161 of the motor 160 through the shaft hole 171. Thus, driven by the motor 160, the rotating shaft 170 can drive the first connector 110 and the second connector 120 to rotate as a whole, realizing the oscillating and sweeping operation of the circulating fan.

[0077] See again Figure 6 As shown, in some embodiments, the second connector 120 has a wiring hole 123 and a first wiring groove 122. The first wiring groove 122 is located on the side of the second connector 120 away from the locking mechanism 130, and the wiring hole 123 is located at the end of the first wiring groove 122 near the motor 160. The bracket assembly 100 also includes a cable 180, one end of which is connected to the motor 160 and passes through the wiring hole 123 and the first wiring groove 122 in sequence.

[0078] Specifically, the first cable routing groove 122 is formed in the triangular portion of the second connector 120 and is located on the side of the first friction plate opposite to the second friction plate 150140. The cable routing hole 123 is located on the side of the first cable routing groove 122 near the cylindrical portion to facilitate the laying of the cable 180. After the motor 160 is fixed to the second connector 120, one end of the cable 180 is connected to the motor 160 through a plug to meet the power supply requirements of the motor 160. Then, the cable 180 passes through the cable routing hole 123 into the first cable routing groove 122, and is clamped and fixed by the cable routing hole 123. In addition, the first cable routing groove 122 has an arc-shaped structure so that when the cable 180 is laid in the first cable routing groove 122, the cable 180 has sufficient extension and retraction length as the first connector 110 rotates, and will not cause problems such as knotting due to arbitrary movement.

[0079] Continue reading Figure 11 As shown, further, a second cable routing groove 111 is provided on the side where the first connector 110 and the second connector 120 are rotatably engaged. After the first connector 110 and the second connector 120 are installed and engaged, the second cable routing groove 111 communicates with the first cable routing groove 122 to guide the cable 180 from the first cable routing groove 122 to the second cable routing groove 111, and then enters the first connector 110 through the second cable routing groove 111 to make an electrical connection with the fan head assembly. The second cable routing groove 111 may be arc-shaped to satisfy the rotation limit of the cable 180, and the edges are rounded to reduce the wear of the cable 180 during the rotation of the first connector 110.

[0080] Additionally, the first connector 110 has a through hole on the side away from the locking mechanism 130 to facilitate the replacement and maintenance of components on that side. The bracket assembly 100 also includes a cover plate 1100, which covers the through hole to seal the internal components of the first connector 110.

[0081] Embodiments of this application also provide a circulating fan, including the support assembly 100 in any of the above embodiments.

[0082] Specifically, the air supply device also includes a fan head assembly and a support assembly. The fan head assembly is rotatably connected to the first connecting member 110, allowing it to rotate relative to the first connecting member 110. Combined with the rotational capability of the second connecting member 120, this enables the fan head assembly to sweep air up, down, left, and right. The support assembly is rotatably connected to the second connecting member 120 and is placed on the ground to support the fan head assembly. Simultaneously, the second connecting member 120 can rotate relative to the support assembly under the drive of the rotating shaft 170, thereby enabling the fan head assembly to sweep air left and right.

[0083] This embodiment includes the support assembly 100 of any of the above embodiments, and therefore has all the beneficial effects of the support assembly 100 of any of the above embodiments, which will not be described in detail here.

[0084] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A support assembly, characterized in that, include: First connector; The second connector is rotatably connected to the first connector. A locking mechanism is provided at the rotatable connection between the first connector and the second connector; The locking mechanism includes a button and a ratchet. The ratchet is fixed inside the second connector and engages with the button to prevent rotation in one direction. The button passes through the connection between the first connector and the second connector and can be controlled to separate from the ratchet.

2. The support assembly according to claim 1, characterized in that, The button has a first toothed surface on the side near the ratchet, and the ratchet has a second toothed surface on the side near the button. The tooth grooves of the second toothed surface are opposite to those of the first toothed surface.

3. The support assembly according to claim 1, characterized in that, The locking mechanism also includes an elastic element, which is disposed on the side of the button near the ratchet, and one end is connected to the button.

4. The support assembly according to claim 1, characterized in that, The second connector has two limiting grooves opposite each other along the centerline; The bracket assembly further includes a first friction plate and a second friction plate, the first friction plate and the second friction plate being respectively installed in a corresponding limiting groove.

5. The support assembly according to claim 4, characterized in that, The second friction plate is fixedly connected to the ratchet.

6. The support assembly according to claim 4, characterized in that, Both the first friction plate and the second friction plate are provided with limiting ribs, which are inserted into the limiting grooves.

7. The support assembly according to claim 1, characterized in that, The bracket assembly also includes a through-plug and a locking component. The through-plug passes through the first connector and the second connector in sequence and is then locked with the locking component so that the first connector can rotate along the axis of the through-plug.

8. The support assembly according to claim 1, characterized in that, The bracket assembly also includes a motor and a rotating shaft. The rotating shaft is installed in the second connector parallel to the direction of gravity, and the output shaft of the motor is connected to the rotating shaft.

9. The support assembly according to claim 8, characterized in that, The second connector has a wiring hole and a first wiring groove. The first wiring groove is located on the side of the second connector away from the locking mechanism, and the wiring hole is located at the end of the first wiring groove closer to the motor. The bracket assembly also includes a cable, one end of which is connected to the motor and passes through the cable hole and the first cable groove in sequence.

10. A circulating fan, characterized in that, The bracket assembly includes any one of claims 1 to 9.

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