Driving device and electric curtain

Abstract

The utility model relates to a driving device and an electric curtain. The driving device comprises a winding mechanism which comprises a first winding wheel and a second winding wheel, and the first winding wheel and the second winding wheel are used for winding a traction rope; the driving mechanism comprises a supporting shell, a driving assembly, a first output assembly and a second output assembly, the driving assembly, the first output assembly and the second output assembly are rotatably connected to the supporting shell, the first output assembly is coaxially connected with the first winding wheel and drives the first winding wheel to rotate so as to wind the traction rope, and the second output assembly and the second winding wheel are coaxially arranged; and the driving assembly is selectively in transmission fit with or separated from the first output assembly and the second output assembly so as to drive the first output assembly or the second output assembly to rotate. Thus, the driving assembly is selectively in transmission fit with or disengaged from the first output assembly and the second output assembly, so that the electric curtain can be freely opened or closed under any condition, and a user can conveniently use the electric curtain.

Description

Technical Field

[0001] This application relates to the field of smart home technology, and in particular to a drive device and an electric curtain. Background Technology

[0002] Generally, curtains can be controlled manually or electrically. Manual curtains require users to pull the curtains to open or close them. Manual curtains are cumbersome to operate, increasing the amount of user work, and they cannot be remotely controlled according to actual weather conditions.

[0003] Electric curtains are a representative product of smart homes and have become an important part of the smart home control system, bringing a smart experience to families. They can be controlled to open and close via remote control or smart control terminal.

[0004] Currently, common electric curtains are generally a complete set of devices, which includes a drive unit, a transmission component, and a curtain. The drive unit drives the transmission component to move, and the transmission component then drives the curtain to move, thereby realizing the closing and opening of the curtain.

[0005] Typically, the drive mechanism in motorized curtains is primarily driven by a motor. In the event of a power outage or a malfunction in the drive mechanism, users need to apply considerable force to pull the curtains, and even with significant force, the curtains may not open or close, causing inconvenience to the user. Utility Model Content

[0006] Therefore, it is necessary to provide a driving device and electric curtain to address the problem of inconvenience caused by the need to pull the curtains with great force during power outages or malfunctions. This device would enable the electric curtains to be opened or closed freely under any circumstances, making them convenient for users.

[0007] A driving device, comprising:

[0008] A winding mechanism, including a first winding wheel and a second winding wheel, wherein the first winding wheel and the second winding wheel are used to wind the traction cord of an electric curtain; and

[0009] The drive mechanism includes a support housing and a drive assembly, a first output assembly, and a second output assembly rotatably connected to the support housing. The first output assembly is coaxially connected to the first winding wheel and drives the first winding wheel to rotate to wind the traction rope. The second output assembly is coaxially arranged with the second winding wheel and drives the second winding wheel to rotate to wind the traction rope. The drive assembly can selectively engage or disengage with the first output assembly and the second output assembly to drive the first output assembly or the second output assembly to rotate.

[0010] In one embodiment of this application, the drive device further includes a pretensioning mechanism, the pretensioning mechanism including a first pretensioning component and / or a second pretensioning component;

[0011] The first pretensioning component is disposed on the support housing and located on the side of the support housing opposite to the first winding wheel. The first pretensioning component is coaxially connected to the first output component and moves with the first output component to tension the traction rope.

[0012] The second pretensioning component is disposed on the support housing and located on the side of the support housing opposite to the second winding wheel. The second pretensioning component is coaxially connected to the second output component and moves with the second output component to tension the traction rope.

[0013] In one embodiment of this application, the first pre-tightening assembly includes an elastic element, a pre-tightening shaft, and a pre-tightening housing. The pre-tightening housing is disposed in the support housing, and the pre-tightening shaft is rotatably disposed in the pre-tightening housing and connected to the output end of the first output assembly. The elastic element is disposed in the pre-tightening housing, with one end connected to the pre-tightening housing and the other end connected to the pre-tightening shaft.

[0014] The structure of the second pretensioning component is the same as that of the first pretensioning component.

[0015] In one embodiment of this application, the first output component includes a first transition wheel, a first output wheel, and a first output shaft. The first output shaft extends rotatably through the support housing. The first output shaft is axially disposed on the first output wheel and coaxially connected to the first winding wheel. The first transition wheel is rotatably disposed on the support housing and is drively connected to the first output shaft.

[0016] And / or, the second output component includes a second transition wheel, a second output wheel, and a second output shaft. The second output shaft extends rotatably through the support housing. The second output shaft is axially disposed on the second output wheel and coaxially connected to the second winding wheel. The second transition wheel is rotatably disposed on the support housing and is drively connected to the second output shaft.

[0017] In one embodiment of this application, the first output shaft is output through the support housing at both ends. The first output shaft has a first connecting part and a second connecting part at each end. The first connecting part is used to coaxially connect the first output shaft to the first pre-tightening assembly, and the second connecting part is used to coaxially connect the first output shaft to the first winding wheel. The first connecting part and the second connecting part are one of a connecting protrusion, a connecting key, and a connecting recess.

[0018] And / or, the two ends of the second output shaft pass through the support housing for output, and the two ends of the second output shaft respectively have a third connecting part and a fourth connecting part. The third connecting part is used to coaxially connect the second output shaft to the second pre-tightening assembly, and the fourth connecting part is used to coaxially connect the second output shaft to the second winding wheel. The third connecting part and the fourth connecting part are one of the following: connecting protrusion, connecting key and connecting recess.

[0019] In one embodiment of this application, the driving assembly includes a driving component and a driving wheel. The driving component is disposed on the support housing, and the driving wheel is disposed at the output end of the driving component and is connected in a transmission manner to the first output component and the second output component.

[0020] And / or, the support housing includes a first support housing and a second support housing, the first support housing and the second support housing enclose an installation space, the first output component and the second output component are located in the installation space, and the driving component of the driving component is disposed on the second support housing and extends through the second support housing;

[0021] And / or, the drive device further includes a mounting housing, in which both the winding mechanism and the drive mechanism are disposed;

[0022] And / or, the drive device further includes a control motherboard, the control motherboard being electrically connected to the drive assembly;

[0023] And / or, the drive device further includes a power supply element electrically connected to the drive assembly.

[0024] In one embodiment of this application, the driving mechanism further includes a clutch assembly, which is drivenly connected to the output end of the driving assembly and is also drivenly and clutchily connected to the first output assembly and the second output assembly to drive the first output assembly or the second output assembly to rotate;

[0025] The clutch assembly has a disengagement position, a first engagement position, and a second engagement position. The clutch assembly is disengaged from the first output assembly and the second output assembly in the disengagement position. The clutch assembly engages with the first output assembly and disengages from the second output assembly in the first engagement position. The clutch assembly engages with the second output assembly and disengages from the first output assembly in the second engagement position.

[0026] The drive assembly can drive the clutch assembly to move, so that the clutch assembly switches between the disengaged position, the first engaged position and the second engaged position.

[0027] In one embodiment of this application, the clutch assembly includes a first clutch wheel and a second clutch wheel. The first clutch wheel is rotatably disposed on the support housing and is drively connected to the output end of the drive assembly. The second clutch wheel is disposed on the first clutch wheel, and its center is offset from the rotation center of the first clutch wheel. It rotates with the first clutch wheel so that the second clutch wheel can engage or disengage with the first transition wheel of the first output assembly and the second transition wheel of the second output assembly.

[0028] In one embodiment of this application, the clutch assembly further includes a third clutch wheel, a first connecting shaft, and a support arm. The third clutch wheel is coaxially connected to the first clutch wheel. The first connecting shaft is axially disposed on the third clutch wheel. The support arm connects the first connecting shaft and the second clutch wheel radially along the third clutch wheel, so that the first connecting shaft drives the second clutch wheel to rotate with the third clutch wheel through the support arm.

[0029] An electric curtain includes a pull rope, a curtain body, and a drive device as described in any of the above technical features;

[0030] The drive device is connected to the traction rope via a first winding wheel and a second winding wheel. The curtain body is disposed on the traction rope and corresponds to the first winding wheel or the second winding wheel. The drive device can drive the traction rope to move so that the traction rope drives the curtain body to open or close.

[0031] By adopting the above technical solution, this application has at least the following technical effects:

[0032] The driving device and electric curtain of this application include a driving mechanism in which a first output component is coaxially connected to a first winding wheel, and a second output component is coaxially connected to a second winding wheel. The driving component is movably disposed within a support housing and can selectively engage or disengage from the first and second output components. When the driving component disengages from the first and second output components, both components stop rotating. When the driving component is engaged with the first output component, the first output component drives the first winding wheel to rotate, causing it to wind the traction rope. When the driving component is engaged with the second output component, the second output component drives the second winding wheel to rotate, causing it to wind the traction rope.

[0033] This drive unit allows the drive assembly to selectively engage or disengage with the first and second output assemblies to control their rotation or stop. When engaged with either the first or second output assembly, the first and second winding pulleys wind or release the traction rope, driving its movement and thus controlling the automatic opening or closing of the motorized curtains. When disengaged, the motorized curtains can be manually opened or closed. This design prevents the curtains from failing to open in case of power failure or malfunction, ensuring they can be freely opened and closed under any circumstances for user convenience. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the connection between the drive device and the traction rope according to an embodiment of this application.

[0035] Figure 2 for Figure 1 A perspective view of the drive unit shown.

[0036] Figure 3 for Figure 2 The side view of the drive unit shown.

[0037] Figure 4 for Figure 3 The diagram shows a drive unit along the AA direction.

[0038] Figure 5 for Figure 1 An exploded view of the drive unit shown.

[0039] Figure 6 for Figure 5 An exploded view of the drive mechanism, winding mechanism, and preload mechanism working together in the drive device shown.

[0040] Figure 7 for Figure 6 A schematic diagram of the first pretensioning component in the pretensioning mechanism shown.

[0041] Figure 8 for Figure 7 The diagram shown is a schematic diagram of the first preload assembly along the BB direction.

[0042] Figure 9 for Figure 7 The diagram shown is a schematic representation of the first preload assembly along the CC direction.

[0043] Figure 10 for Figure 7 An exploded view of the first preload assembly is shown.

[0044] Figure 11 for Figure 6 A top view showing the coordinated operation of the drive mechanism, winding mechanism, and preload mechanism.

[0045] Figure 12 for Figure 11 The diagram shows the drive mechanism, winding mechanism, and preload mechanism along the DD direction.

[0046] Figure 13 for Figure 5 An exploded view of the drive mechanism in the drive device shown.

[0047] Figure 14 for Figure 13 The diagram shows the drive mechanism in which the drive wheel is separated from the first output component and the second output component.

[0048] Figure 15 for Figure 13 The diagram shows the interaction between the drive wheel and the second output component in the drive mechanism.

[0049] Figure 16 for Figure 13 The diagram shows the interaction between the drive wheel and the first output component in the drive mechanism.

[0050] Wherein: 1. Electric curtain; 10. Drive device; 100. Winding mechanism; 110. First winding wheel; 111. Second shaft hole; 112. Second mating part; 120. Second winding wheel; 200. Drive mechanism; 210. Support housing; 211. First support housing; 212. Second support housing; 220. Drive assembly; 221. Drive component; 222. Drive wheel; 230. Clutch assembly; 231. First clutch wheel; 232. Second clutch wheel; 233. Third clutch wheel; 234. First connecting shaft; 235. Support arm; 236. Second connecting shaft; 240. First output assembly; 241. First transition wheel; 2411. Transition wheel shaft; 2412. First wheel; 2413. Second wheel; 242. First output wheel; 243. First output shaft; 2431. First connecting part; 2432. 250. Second connecting part; 251. Second transition wheel; 252. Second output wheel; 253. Second output shaft; 2531. Third connecting part; 2532. Fourth connecting part; 300. Pre-tightening mechanism; 310. First pre-tightening component; 311. Elastic element; 312. Pre-tightening shaft; 3121. First shaft hole; 3122. First mating part; 313. Pre-tightening housing; 3131. First housing; 31311. First snap-fit ​​part; 31312. First rotating groove; 3132. Second housing; 31321. Second snap-fit ​​part; 31322. Second rotating groove; 3133. First connecting hole; 314. Fixing element; 320. Second pre-tightening component; 400. Mounting housing; 410. First half-shell; 420. Second half-shell; 500. Control main board; 600. Power supply element; 70. Traction rope. Detailed Implementation

[0051] 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.

[0052] 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.

[0053] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] Understandably, motorized curtains are a representative product of smart homes. Currently, common motorized curtains are generally a complete system, including a drive unit, a transmission component, and the curtain itself. The drive unit moves the transmission component, which in turn moves the curtain, thus opening and closing it. Typically, the drive unit in motorized curtains is driven by a motor. In the event of a power outage or a malfunction of the drive unit, users need to use considerable force to pull the curtains, and even then, considerable force may not be enough to open or close them, causing inconvenience.

[0058] For this purpose, please refer to Figures 1 to 5 This application provides a driving device 10. Figure 1 This is a schematic diagram showing the connection between the drive device 10 and the traction rope 70 according to an embodiment of this application. Figure 2 for Figure 1 The perspective view of the drive device 10 shown. Figure 3 for Figure 2 The side view of the drive unit 10 shown. Figure 4 for Figure 3 The schematic diagram of the drive device 10 along the AA direction is shown. Figure 5 for Figure 1 An exploded view of the drive device 10 shown.

[0059] The drive unit 10 is used in the motorized curtain 1. For example... Figure 1 As shown, the electric curtain 1 includes a pull rope 70, a curtain body (not shown), and a drive device 10 as described in this application. The drive device 10 is connected to the pull rope 70 of the electric curtain 1. The curtain body is disposed on the pull rope 70. The drive device 10 can drive the pull rope 70 to move, and thus the pull rope 70 can drive the curtain body to move synchronously, thereby controlling the electric curtain 1 to open or close automatically. Here, the curtain body is curtain fabric or other components that can cover the window.

[0060] Of course, in other embodiments of this application, the drive device 10 can also be applied to other structures / devices that employ rope movement control, serving as a power source for rope movement. In the following description of the specific structure of the drive device 10, only the application of the drive device 10 to the electric curtain 1 will be used as an example.

[0061] The drive device 10 of this application can realize the automatic opening and closing of the electric curtain 1. At the same time, it can also realize the manual opening and closing of the electric curtain 1, so as to avoid the electric curtain 1 being unable to open when the drive device 10 is powered off or malfunctions. It ensures that the electric curtain 1 can be freely opened or closed under any circumstances, which is convenient for users.

[0062] See Figures 1 to 6 In one embodiment, the drive device 10 includes a winding mechanism 100 and a drive mechanism 200. The winding mechanism 100 includes a first winding wheel 110 and a second winding wheel 120, which are used to wind the traction rope 70 of the electric curtain 1. The drive mechanism 200 includes a support housing 210 and a drive assembly 220, a first output assembly 240, and a second output assembly 250 rotatably connected to the support housing 210. The first output assembly 240 is coaxially connected to the first winding wheel 110 and drives the first winding wheel 110 to rotate to wind the traction rope 70. The second output assembly 250 is coaxially arranged with the second winding wheel 120 and drives the second winding wheel 120 to rotate to wind the traction rope 70. The drive assembly 220 can selectively engage or disengage with the first output assembly 240 and the second output assembly 250 to drive the first output assembly 240 or the second output assembly 250 to rotate. Figure 6 for Figure 5 An exploded view of the drive mechanism 200, winding mechanism 100, and pre-tightening mechanism 300 working together in the drive device 10 shown.

[0063] In the winding mechanism 100, the first winding wheel 110 and the second winding wheel 120 are components for winding the traction rope 70 of the electric curtain 1. One end of the traction rope 70 is wound around the first winding wheel 110, and the other end of the traction rope 70 is wound around the second winding wheel 120. The drive mechanism 200 can drive the first winding wheel 110 or the second winding wheel 120 to rotate, so that the first winding wheel 110 and the second winding wheel 120 can rotate synchronously. One of the first winding wheel 110 and the second winding wheel 120 winds the traction rope 70, while the other releases the traction rope 70, causing the traction rope 70 to move. In turn, the traction rope 70 can drive the curtain body to move, realizing the automatic opening or closing of the electric curtain 1.

[0064] Specifically, the drive assembly 220 is the power source of the drive mechanism 200, and the first output assembly 240 and the second output assembly 250 are components that output rotational motion. The drive assembly 220, the first output assembly 240 and the second output assembly 250 are rotatably mounted on the support housing 210, and the support housing 210 provides rotational support for the drive assembly 220, the first output assembly 240 and the second output assembly 250.

[0065] Simultaneously, the first output component 240 is coaxially connected to the first winding reel 110. When the first output component 240 rotates, it can drive the first winding reel 110 to rotate synchronously, so that the first winding reel 110 winds the traction rope 70. The second output component 250 is coaxially connected to the second winding reel 120. When the second output component 250 rotates, it can drive the second winding reel 120 to rotate synchronously, so that the second winding reel 120 winds the traction rope 70.

[0066] The drive assembly 220 can selectively engage or disengage with the first output assembly 240 and the second output assembly 250 to drive or stop the rotation of either the first output assembly 240 or the second output assembly 250. When the drive assembly 220 is engaged with the first output assembly 240, the drive assembly 220 is disengaged from the second output assembly 250. At this time, the drive assembly 220 can drive the first output assembly 240 to rotate. The first output assembly 240 drives the first winding wheel 110 to rotate, so that the first winding wheel 110 winds the traction rope 70. When the first winding wheel 110 winds the traction rope 70, it can generate a pulling force on the traction rope 70, which in turn can pull the second winding wheel 120 to rotate, so that the second winding wheel 120 releases the traction rope 70.

[0067] When the drive assembly 220 is engaged with the second output assembly 250, the drive assembly 220 is separated from the first output assembly 240. At this time, the drive assembly 220 can drive the second output assembly 250 to rotate. The second output assembly 250 drives the second winding wheel 120 to rotate, so that the second winding wheel 120 winds the traction rope 70. When the second winding wheel 120 winds the traction rope 70, it can generate a pulling force on the traction rope 70, and this pulling force can pull the first winding wheel 110 to rotate, so that the first winding wheel 110 releases the traction rope 70. When the drive assembly 220 is separated from both the first output assembly 240 and the second output assembly 250, both the first output assembly 240 and the second output assembly 250 are in a stationary state.

[0068] When the electric curtain 1 opens automatically, the drive component 220 and the second output component 250 are driven to rotate counterclockwise. The second output component 250 drives the second winding wheel 120 to rotate counterclockwise. The second winding wheel 120 retracts the traction rope 70 (wraps the traction rope 70). At the same time, the second winding wheel 120 pulls the first winding wheel 110 to rotate counterclockwise through the traction rope 70, so that the first winding wheel 110 releases the traction rope 70. At this time, the traction rope 70 can drive the curtain body to move, so that the curtain body opens, realizing the automatic opening of the electric curtain 1.

[0069] When the electric curtain 1 closes automatically, the drive assembly 220 and the first output assembly 240 engage in a transmission mechanism. The first output assembly 240 drives the first winding wheel 110 to rotate clockwise, winding the traction rope 70 around it. Simultaneously, the first winding wheel 110 pulls the second winding wheel 120 clockwise via the traction rope 70, causing the second winding wheel 120 to release the traction rope 70. At this time, the traction rope 70 can move the curtain body, closing it and achieving the automatic closing of the electric curtain 1. Of course, the drive assembly 220 can also drive the first winding wheel 110 to rotate, achieving the automatic closing of the electric curtain 1, and drive the second winding wheel 120 to rotate, achieving the automatic opening of the electric curtain 1. The principle is essentially the same as described above and will not be repeated hereafter.

[0070] When the electric curtain 1 is in its initial state, the drive component 220 is centered and separated from the first output component 240 and the second output component 250. At this time, the first output component 240 and the second output component 250 can rotate freely. When the drive component 220 cooperates with the first output component 240 or the second output component 250, the electric curtain 1 is in an electric state, enabling the electric curtain 1 to open or close automatically.

[0071] Furthermore, the electric curtain 1 can also be in manual mode. In its initial state, the user can pull the curtain body to move the pull rope 70 towards or away from the drive unit 10. This allows either the first winding wheel 110 or the second winding wheel 120 to release the pull rope 70, thus enabling manual opening and closing of the curtain. In this way, even if the drive assembly 220 is powered off or malfunctioning, the user can freely open or close the electric curtain 1.

[0072] The drive device 10 in the above embodiment can selectively engage or disengage with the first output component 240 and the second output component 250 via the drive assembly 220 to control the rotation or stop of the first output component 240 and the second output component 250. When the drive assembly 220 is engaged with the first output component 240 or the second output component 250, the first winding wheel 110 and the second winding wheel 120 can wind or release the traction rope 70 to drive the traction rope 70 to move, thereby controlling the automatic opening or closing of the electric curtain 1. When the drive assembly 220 is disengaged from the first output component 240 and the second output component 250, the electric curtain 1 can be manually opened or closed. In this way, the situation where the electric curtain 1 cannot be opened when the drive device 10 is powered off or malfunctions can be avoided, ensuring that the electric curtain 1 can be freely opened or closed under any circumstances, which is convenient for users.

[0073] See Figures 4 to 12 In one embodiment, the drive device 10 further includes a pre-tensioning mechanism 300. Figure 7 for Figure 6 A schematic diagram of the first pretensioning component 310 in the pretensioning mechanism 300 shown. Figure 8 for Figure 7 The diagram shown illustrates the first preload assembly 310 along the BB direction. Figure 9 for Figure 7 The diagram shown is a schematic representation of the first preload assembly 310 along the CC direction. Figure 10 for Figure 7 The exploded view of the first preload assembly 310 shown is shown below. Figure 11 for Figure 6 The top view shown depicts the coordinated operation of the drive mechanism 200, winding mechanism 100, and preload mechanism 300. Figure 12 for Figure 11 The schematic diagram of the drive mechanism 200, winding mechanism 100 and pre-tensioning mechanism 300 along the DD direction is shown.

[0074] The pretensioning mechanism 300 can be tightened to generate a pretension force on the traction rope 70, so that the traction rope 70 is always kept taut. In this way, when one of the first winding pulley 110 and the second winding pulley 120 winds the traction rope 70, the tension of the traction rope 70 by the pretensioning mechanism 300 can cause the other of the first winding pulley 110 and the second winding pulley 120 to release the traction rope 70, so that the traction rope 70 can drive the curtain body to move synchronously, realizing the opening or closing of the curtain body.

[0075] See Figures 4 to 12 In this embodiment, the pretensioning mechanism 300 includes a first pretensioning component 310 and a second pretensioning component 320. The first pretensioning component 310 is disposed on the support housing 210 and located on the side of the support housing 210 opposite to the first winding wheel 110. The first pretensioning component 310 is coaxially connected to the first output component 240 and moves with the first output component 240 to tension the traction rope 70. The second pretensioning component 320 is disposed on the support housing 210 and located on the side of the support housing 210 opposite to the second winding wheel 120. The second pretensioning component 320 is coaxially connected to the second output component 250 and moves with the second output component 250 to tension the traction rope 70.

[0076] The first preload assembly 310 is disposed on the side of the support housing 210 opposite to the first winding wheel 110, and is connected to the first output assembly 240. That is, the axial ends of the first output assembly 240 are respectively connected to the first winding wheel 110 and the first preload assembly 310. The second preload assembly 320 is disposed on the side of the support housing 210 opposite to the second winding wheel 120, and is connected to the second output assembly 250. That is, the axial ends of the second output assembly 250 are respectively connected to the second winding wheel 120 and the second preload assembly 320.

[0077] Understandably, the first pretensioning component 310 and the second pretensioning component 320 are always in a taut state. The pretensioning force of the first pretensioning component 310 on the first winding wheel 110 through the first output component 240 is roughly matched with the pretensioning force of the second pretensioning component 320 on the second winding wheel 120 through the second output component 250. In this way, the first pretensioning component 310 and the second pretensioning component 320 can pretension the traction rope 70, keep the traction rope 70 in a taut state, prevent the traction rope 70 from slack, and facilitate the traction rope 70 to drive the curtain body to open or close.

[0078] When the first output component 240 drives the first winding wheel 110 to rotate clockwise, the first winding wheel 110 can wind the traction rope 70, the first pretension component 310 is retracted, and its pretension force (the force brought by tension) gradually decreases. After the first winding wheel 110 finishes winding the traction rope 70, the first pretension component 310 still has a certain pretension force to keep the traction rope 70 taut. When the first output component 240 drives the first winding wheel 110 to rotate counterclockwise, the first winding wheel 110 can release the traction rope 70, the first pretension component 310 is tightened, and its pretension force gradually increases. After the first winding wheel 110 finishes releasing the traction rope, the first pretension component 310 is fully taut.

[0079] It is worth noting that the working principle of the second pretensioning component 320 is essentially the same as that of the first pretensioning component 310. The following description of the working state of the first pretensioning component 310 and the second pretensioning component 320 is based on the opening and closing of the electric curtain 1.

[0080] When the electric curtain 1 is open, the first pre-tensioning component 310 is fully tensioned, and the second pre-tensioning component 320 is partially tensioned. When the electric curtain 1 is closed, the second pre-tensioning component 320 is fully tensioned, and the first pre-tensioning component 310 is partially tensioned. Taking the electric curtain 1 in the open state as an example, the difference between full tension and partial tension is explained as follows: Full tension means that the first pre-tensioning component 310 is tensioned to its limit (preset position), and the first winding wheel 110 corresponding to the first pre-tensioning component 310 has completely released the traction rope 70. Later, the first winding wheel 110 can only wind the traction rope 70 and cannot release the traction rope 70. Partial tension means that the second pre-tensioning component 320 is not tensioned to its limit (preset position), but there is still a certain pre-tension force in the second pre-tensioning component 320. The second winding wheel 120 corresponding to the second pre-tensioning component 320 is partially tensioned due to winding the traction rope 70. Later, the second winding wheel 120 can release the traction rope 70.

[0081] Understandably, neither the first pretensioning component 310 nor the second pretensioning component 320 can be relaxed (not taut) during operation, as this would cause the traction rope 70 to slack. Therefore, both the first pretensioning component 310 and the second pretensioning component 320 need to be taut, but the degree of tension differs. The tension (pretension force) when fully taut is greater than the pretension force when partially taut. When the electric curtain switches from the open state to the closed state, the first pretensioning component 310 gradually switches from fully taut to partially taut, while the second pretensioning component 320 gradually switches from partially taut to fully taut. When the electric curtain switches from the closed state to the open state, the first pretensioning component 310 gradually switches from partially taut to fully taut, while the second pretensioning component 320 gradually switches from fully taut to partially taut.

[0082] Specifically, when the electric curtain 1 is opened, the drive assembly 220 engages with the second output assembly 250, driving the second winding wheel 120 to rotate counterclockwise to wind the traction rope 70. During the counterclockwise rotation of the second winding wheel 120 to wind the traction rope 70, the second pre-tensioning assembly 320 is gradually retracted (wound), and its pre-tension force gradually decreases. Simultaneously, the second winding wheel 120 pulls the traction rope 70, causing the first winding wheel 110 to release the traction rope 70. At this time, the first pre-tensioning assembly 310 gradually tightens (stretches), and its pre-tension force gradually increases. When the traction rope 70 fully opens the electric curtain 1, the first pre-tensioning assembly 310 is fully taut, and the second pre-tensioning assembly 320 is partially taut.

[0083] When the electric curtain 1 is closed, the drive assembly 220 engages with the first output assembly 240, driving the first winding wheel 110 to rotate clockwise to wind the traction rope 70. As the first winding wheel 110 rotates clockwise to wind the traction rope 70, the first pre-tensioning assembly 310 is gradually retracted, and its pre-tension force gradually decreases. Simultaneously, the first winding wheel 110 pulls the traction rope 70, causing the second winding wheel 120 to release the traction rope 70. At this time, the second pre-tensioning assembly 320 gradually tightens, and its pre-tension force gradually increases. When the traction rope 70 completely closes the electric curtain 1, the first pre-tensioning assembly 310 is partially taut, and the second pre-tensioning assembly 320 is fully taut.

[0084] When the electric curtain 1 is in the open or closed state, the first pretensioning component 310 and the second pretensioning component 320 are both fully or partially tensioned, thereby enabling the tensioning rope 70 to be tensioned.

[0085] When the electric curtain 1 is manually opened, the user pulls the curtain body, causing the traction rope 70 to move towards the second winding wheel 120. This causes the first winding wheel 110 to release the traction rope 70. Since the first pre-tensioning component 310 is partially tightened and the second pre-tensioning component 320 is fully tightened when the electric curtain 1 is closed, the pre-tensioning force of the second pre-tensioning component 320 drives the second winding wheel 120 to gradually wind the traction rope 70. This causes the second pre-tensioning component 320 to be gradually pulled back (wound), and its pre-tensioning force gradually decreases. Simultaneously, the first pre-tensioning component 310 gradually tightens (stretches), and its pre-tensioning force gradually increases. When the traction rope 70 drives the electric curtain 1 to be manually opened, the first pre-tensioning component 310 is fully tightened, and the second pre-tensioning component 320 is partially tightened.

[0086] When the electric curtain 1 is manually closed, the user pulls the curtain body, causing the traction rope 70 to move towards the first winding wheel 110, which in turn causes the second winding wheel 120 to release the traction rope 70. Since the first pre-tensioning component 310 is fully tensioned and the second pre-tensioning component 320 is partially tensioned when the electric curtain 1 is opened, the pre-tensioning force of the first pre-tensioning component 310 drives the first winding wheel 110 to gradually wind the traction rope 70, causing the first pre-tensioning component 310 to be gradually pulled back (wound), and its pre-tensioning force to gradually decrease. Simultaneously, the second pre-tensioning component 320 gradually tightens (stretches), and its pre-tensioning force gradually increases. When the traction rope 70 drives the electric curtain 1 to be manually closed, the first pre-tensioning component 310 is partially tensioned, and the second pre-tensioning component 320 is fully tensioned.

[0087] Of course, in other embodiments of this application, the pretensioning mechanism 300 may include only the first pretensioning component 310 or only the second pretensioning component 320. That is, the first pretensioning component 310 may be provided only on the first output component 240, or the second pretensioning component 320 may be provided only on the second output component 250. Its working principle is substantially the same as that of the drive device 10 including the first pretensioning component 310 and the second pretensioning component 320, and will not be described below. Furthermore, the structure of the second pretensioning component 320 is the same as that of the first pretensioning component 310. The structure of the first pretensioning component 310 will be described below, and the second pretensioning component 320 will not be described.

[0088] See Figures 4 to 12 In one embodiment, the first pre-tightening assembly 310 includes an elastic element 311, a pre-tightening shaft 312, and a pre-tightening housing 313. The pre-tightening housing 313 is disposed on the support housing 210, and the pre-tightening shaft 312 is rotatably disposed on the pre-tightening housing 313 and connected to the output end of the first output assembly 240. The elastic element 311 is disposed in the pre-tightening housing 313, with one end connected to the pre-tightening housing 313 and the other end connected to the pre-tightening shaft 312.

[0089] The pretension housing 313 serves as the outer shell of the first pretension assembly 310. The pretension shaft 312 is rotatably disposed within the support housing 210. The first output assembly 240 can pass through the pretension housing 313 and be coaxially connected to the pretension shaft 312. Furthermore, an elastic element 311 is disposed within the pretension housing 313, with one end fixed to the housing and the other end connected to the pretension shaft 312. When the first output assembly 240 rotates, it drives the pretension shaft 312 to rotate, which in turn drives the elastic element 311 to move, causing it to tighten and thus keeping the traction rope 70 taut.

[0090] See Figure 8 and Figure 10 In one embodiment, the pre-tightening housing 313 includes a first housing 3131 and a second housing 3132. The first housing 3131 covers the second housing 3132 and forms a mounting cavity. The elastic member 311 and the pre-tightening shaft 312 are disposed in the mounting cavity, and both ends of the pre-tightening shaft 312 are rotatably mounted on the first housing 3131 and the second housing 3132, respectively. The first housing 3131 and the second housing 3132 facilitate the assembly of the elastic member 311 and the pre-tightening shaft 312, and also protect the movement of the elastic member 311 and the pre-tightening shaft 312, preventing interference with other components.

[0091] See Figure 8 and Figure 10 In one embodiment, the first housing 3131 has a first snap-fit ​​portion 31311, and the second housing 3132 has a second snap-fit ​​portion 31321 corresponding to the first snap-fit ​​portion 31311. When the first housing 3131 covers the second housing 3132, the first snap-fit ​​portion 31311 snaps into the second snap-fit ​​portion 31321 to achieve a fixed connection between the first housing 3131 and the second housing 3132. In this embodiment, the first snap-fit ​​portion 31311 is a groove provided in the first housing 3131, which is located on the inner wall of the first housing 3131 or penetrates through the first housing 3131. The second snap-fit ​​portion 31321 is a buckle provided on the outer wall of the second housing 3132. The first housing 3131 and the second housing 3132 are assembled and fixed through the cooperation of the buckle and the groove. Of course, in other embodiments of this application, the first snap-fit ​​portion 31311 and the second snap-fit ​​portion 31321 may also be buckles or the like.

[0092] See Figure 8 and Figure 10 In one embodiment, the preload housing 313 has a first connecting hole 3133 through which the preload shaft 312 protrudes. Thus, the first output assembly 240 can be coaxially connected to the preload shaft 312 through the first connecting hole 3133. See also... Figure 8In one embodiment, the first housing 3131 has a recessed first rotating groove 31312 on the side facing the second housing 3132, and the second housing 3132 has a recessed second rotating groove 31322 on the side facing the first housing 3131. The first rotating groove 31312 and the second rotating groove 31322 are coaxially arranged, and the two ends of the pre-tightening shaft 312 are rotatably installed into the first rotating groove 31312 and the second rotating groove 31322, respectively.

[0093] See Figure 8 and Figure 10 In one embodiment, the pretensioning mechanism 300 further includes a fixing member 314, which is disposed in the pretensioning housing 313 and is used to fix the other end of the elastic member 311. The fixing member 314 is axially disposed in the second housing 3132, one end of the elastic member 311 is fixed to the pretensioning shaft 312, and the other end of the elastic member 311 is fixed to the fixing member 314. The fixing member 314 fixes the elastic member 311 to the second housing 3132, preventing the elastic member 311 from shifting its position when tightened, and ensuring that the traction rope 70 remains taut.

[0094] See Figure 8 and Figure 10 In one embodiment, the elastic element 311 is a coil spring, with its central end connected to the pre-tensioning shaft 312 and its outer end fixed to the pre-tensioning housing 313. When the pre-tensioning shaft 312 rotates, it can cause the coil spring to retract (wind) or tighten (stretch). When the first pre-tensioning component 310 is taut, the coil spring is in a stretched state. When the first winding wheel 110 releases the traction rope 70, the coil spring is gradually stretched. After the first winding wheel 110 completes the release of the traction rope 70, the first pre-tensioning component 310 is fully taut, and the coil spring is stretched to its limit position or a preset position. When the first winding wheel 110 winds the first traction rope 70, the coil spring is gradually retracted. Furthermore, after the first winding wheel 110 completes the winding of the traction rope 70, the coil spring is not completely retracted and remains partially stretched, meaning the first pre-tensioning component 310 is partially taut.

[0095] Of course, in another embodiment of this application, the elastic element 311 is a torsion spring, which is connected to the preload shaft 312, and one arm of which is fixed to the preload housing 313. When the preload shaft 312 drives the torsion spring to rotate, the torsion spring can drive the other arm to move relative to the first arm, thereby adjusting the elastic force of the torsion spring and thus adjusting the preload force of the first preload assembly 310. It is worth noting that the working principle of the elastic element 311 as a torsion spring is essentially the same as that of a coil spring, and will not be described again here.

[0096] See Figure 5 , Figure 6 and Figure 12In one embodiment, the drive assembly 220 includes a drive component 221 and a drive wheel 222. The drive component 221 is disposed on the support housing 210, and the drive wheel 222 is disposed at the output end of the drive component 221 and is drively connected to the first output assembly 240 and the second output assembly 250. The drive component 221 is the power source of the drive assembly 220. The drive component 221 is disposed on the support housing 210, and the output end of the drive component 221 extends through the support housing 210 and into the interior of the support housing 210 to mount the drive wheel 222. The drive component 221 can control the rotation of the drive wheel 222 so that the drive wheel 222 drives the first output assembly 240 or the second output assembly 250 to rotate. Optionally, the drive component 221 is a geared motor.

[0097] See Figures 1 to 5 In one embodiment, the support housing 210 includes a first support housing 211 and a second support housing 212, which enclose an installation space. A first output component 240 and a second output component 250 are located within the installation space. A drive component 221 of the drive component 220 is disposed on the second support housing 212 and extends through it. The output end of the drive component 221 extends through the second support housing 212 into the support housing 210 to mount a drive wheel 222. The first output component 240 and the second output component 250 are rotatably disposed on the second support housing 212. The first support housing 211 covers the second support housing 212 to support and protect the first output component 240, the second output component 250, and the drive wheel 222.

[0098] In one embodiment, the first support shell 211 and the second support shell 212 are fixedly connected by screws. In another embodiment, the preload housing 313 of the first preload assembly 310 and the second preload assembly 320 are fixed to the first support shell 211 by screws. In yet another embodiment, the screws pass through the preload housing 313 of the first preload assembly 310 and the second preload assembly 320, and the first support shell 211, and are then fixed to the second support shell 212.

[0099] See Figure 5 , Figure 6 , Figures 11 to 16 In one embodiment, the first output component 240 includes a first transition wheel 241, a first output wheel 242, and a first output shaft 243. The first output shaft 243 extends rotatably through the support housing 210. The first output shaft 243 is axially disposed on the first output wheel 242 and coaxially connected to the first winding wheel 110. The first transition wheel 241 is rotatably disposed on the support housing 210 and is drively connected to the first output shaft 243. Figure 13 for Figure 5An exploded view of the drive mechanism 200 in the drive device 10 shown. Figure 14 for Figure 13 The diagram shows the drive wheel 222 separated from the first output component 240 and the second output component 250 in the drive mechanism 200. Figure 15 for Figure 13 The diagram shows the interaction between the drive wheel 222 and the second output component 250 in the drive mechanism 200. Figure 16 for Figure 13 The diagram shows the interaction between the drive wheel 222 and the first output component 240 in the drive mechanism 200.

[0100] The first output shaft 243 is rotatably mounted on the support housing 210 along the axial direction, and both ends of the first output shaft 243 extend through the support housing 210. Thus, one end of the first output shaft 243 extending out of the first support housing 211 is coaxially connected to the preload shaft 312, and the other end of the first output shaft 243 extending out of the second support housing 212 is coaxially connected to the first winding wheel 110. When the first output shaft 243 rotates, it can drive the first winding wheel 110 to rotate synchronously with the preload shaft 312.

[0101] Furthermore, the first transition wheel 241 and the first output wheel 242 are structured to cooperate between the drive assembly 220 and the first output assembly 240 for output. The first transition wheel 241 is rotatably disposed in the support housing 210, and the first output wheel 242 is disposed on the first output shaft 243 and can rotate synchronously with the first output shaft 243. The first transition wheel 241 and the first output shaft 243 are in a transmission engagement. When the drive assembly 220 is in a transmission engagement with the first transition wheel 241 through the drive wheel 222, the drive wheel 222 can drive the first transition wheel 241 to rotate, which in turn drives the first output wheel 242 to rotate, which in turn drives the first output shaft 243 to rotate synchronously, so that the first output shaft 243 drives the first winding wheel 110 to wind the traction rope 70, and drives the pretensioning shaft 312 to retract the elastic element 311.

[0102] See Figure 12 and Figure 13In one embodiment, the first transition wheel 241 includes a transition wheel shaft 2411, a first wheel 2412, and a second wheel 2413. The transition wheel shaft 2411 is rotatably disposed in the support housing 210. The first wheel 2412 and the second wheel 2413 are coaxially disposed on the transition wheel shaft 2411 and rotate with the transition wheel shaft 2411. The first wheel 2412 is driven by the drive wheel 222, and the second wheel 2413 is driven by the first output wheel 242. Thus, when the drive wheel 222 drives the first wheel 2412 to rotate, the first wheel 2412 can drive the transition wheel shaft 2411 to rotate, which in turn drives the second wheel 2413 to rotate, and the second wheel 2413 can drive the first output wheel 242 to rotate.

[0103] In one embodiment, the first output wheel 242, drive wheel 222, first wheel 2412, and second wheel 2413 are all gears, and the first output wheel 242 and drive wheel 222 are connected to the first transition wheel 241 by gear meshing. Of course, in other embodiments of this application, the first output wheel 242, drive wheel 222, first wheel 2412, and second wheel 2413 are all pulleys or sprockets, and synchronous movement is achieved by belt connection or chain drive.

[0104] See Figure 5 , Figure 6 , Figures 11 to 16 In one embodiment, the second output component 250 includes a second transition wheel 251, a second output wheel 252, and a second output shaft 253. The second output shaft 253 extends rotatably through the support housing 210 and is axially disposed on the second output wheel 252 and coaxially connected to the second winding wheel 120. The second transition wheel 251 is rotatably disposed on the support housing 210 and is drively connected to the second output shaft 253.

[0105] The second output shaft 253 is rotatably mounted on the support housing 210 along the axial direction, and both ends of the second output shaft 253 extend through the support housing 210. Thus, one end of the second output shaft 253 extending out of the first support housing 211 is coaxially connected to the preload shaft 312, and the other end of the second output shaft 253 extending out of the second support housing 212 is coaxially connected to the second winding wheel 120. When the second output shaft 253 rotates, it can drive the second winding wheel 120 to rotate synchronously with the preload shaft 312.

[0106] Furthermore, the second transition wheel 251 and the second output wheel 252 are configured to cooperate with the drive assembly 220 and the second output assembly 250 for output. The second transition wheel 251 is rotatably mounted in the support housing 210, and the second output wheel 252 is mounted on the second output shaft 253 and can rotate synchronously with the second output shaft 253. The second transition wheel 251 and the second output shaft 253 are in a transmission cooperation. The structure of the second transition wheel 251 is the same as that of the first transition wheel 241, and will not be described further here.

[0107] When the drive assembly 220 is engaged with the second transition wheel 251 via the drive wheel 222, the drive wheel 222 can drive the second transition wheel 251 to rotate, which in turn drives the second output wheel 252 to rotate, which in turn drives the second output shaft 253 to rotate synchronously, so that the second output shaft 253 drives the second winding wheel 120 to wind the traction rope 70, and drives the pretensioning shaft 312 to retract the elastic element 311.

[0108] See Figure 5 , Figure 6 , Figures 11 to 16 In one embodiment, the first output shaft 243 is output through the support housing 210 at both ends. The first output shaft 243 has a first connecting part 2431 and a second connecting part 2432 at both ends. The first connecting part 2431 is used to coaxially connect the first output shaft 243 to the first pre-tightening assembly 310, and the second connecting part 2432 is used to coaxially connect the first output shaft 243 to the first winding wheel 110.

[0109] The first output shaft 243 extends out of the outer wall of the first support housing 211 and has a first connecting portion 2431. The first output shaft 243 extends out of the outer wall of the second support housing 212 and has a second connecting portion 2432. The first output shaft 243 is coaxially connected to the preload shaft 312 through the first connecting portion 2431 and can drive the preload shaft 312 to rotate synchronously. The first output shaft 243 is coaxially connected to the first winding wheel 110 through the second connecting portion 2432 and can drive the first winding wheel 110 to rotate synchronously.

[0110] See Figure 5 , Figure 6 , Figure 9 , Figure 10 , Figure 12 and Figure 13In one embodiment, the preload shaft 312 has a first shaft hole 3121 extending axially and a first mating portion 3122 disposed on the inner wall of the first shaft hole 3121. After the first output shaft 243 extends into the first shaft hole 3121 of the preload shaft 312, the first output shaft 243 can be correspondingly installed with the first mating portion 3122 through the first connecting portion 2431, so that the preload shaft 312 and the first output shaft 243 are fixedly connected and can rotate synchronously. In this way, the first output shaft 243 can drive the preload shaft 312 to rotate synchronously through the cooperation of the first connecting portion 2431 and the first mating portion 3122.

[0111] See Figure 5 , Figure 6 , Figure 9 , Figure 10 , Figure 12 and Figure 13 In one embodiment, the first winding wheel 110 has a second shaft hole 111 extending axially and a second mating portion 112 disposed on the inner wall of the second shaft hole 111. After the first output shaft 243 extends into the second shaft hole 111 of the first winding wheel 110, the first output shaft 243 can be correspondingly installed with the second mating portion 112 through the second connecting portion 2432, so that the first winding wheel 110 and the first output shaft 243 are fixedly connected and can rotate synchronously. In this way, the first output shaft 243 can drive the first winding wheel 110 to rotate synchronously through the cooperation of the second connecting portion 2432 and the second mating portion 112.

[0112] In one embodiment, the first connecting portion 2431 is one of a connecting protrusion, a connecting key, and a connecting recess, and the cross-sectional shape of the first mating portion 3122 is adapted to the cross-sectional shape of the first connecting portion 2431. For example, the first connecting portion 2431 is a protrusion, and correspondingly, the first mating portion 3122 is a recess. That is, the first output shaft 243 protrudes from the outer wall of the first support shell 211 and has a protrusion; correspondingly, the inner wall of the first shaft hole 3121 of the preload shaft 312 has a recess corresponding to the protrusion. The connection between the first output shaft 243 and the preload shaft 312 is achieved through the engagement of the protrusion and the recess.

[0113] In one embodiment, the second connecting portion 2432 is one of a connecting protrusion, a connecting key, and a connecting recess, and the cross-sectional shape of the second mating portion 112 is adapted to the cross-sectional shape of the second connecting portion 2432. For example, the second connecting portion 2432 is a protrusion, and correspondingly, the second mating portion 112 is a recess. That is, the first output shaft 243 protrudes from the outer wall of the second support shell 212 and has a protrusion; correspondingly, the inner wall of the second shaft hole 111 of the first winding wheel 110 has a recess corresponding to the protrusion. The connection between the first output shaft 243 and the first winding wheel 110 is achieved through the engagement of the protrusion and the recess.

[0114] In this embodiment, the first connecting portion 2431 and the second connecting portion 2432 are protrusions on the first output shaft 243, so that the cross-sectional shape of the first output shaft 243 is an irregular structure. Of course, in other embodiments of this application, the first connecting portion 2431 and the second connecting portion 2432 may also be connecting keys, etc.

[0115] See Figure 5 , Figure 6 , Figures 11 to 16 In one embodiment, the two ends of the second output shaft 253 pass through the support housing 210 for output. The two ends of the second output shaft 253 have a third connecting part 2531 and a fourth connecting part 2532, respectively. The third connecting part 2531 is used to coaxially connect the second output shaft 253 to the second pre-tightening assembly 320, and the fourth connecting part 2532 is used to coaxially connect the second output shaft 253 to the second winding wheel 120. The third connecting part 2531 and the fourth connecting part 2532 are one of the following: connecting protrusion, connecting key and connecting recess.

[0116] It is worth noting that the connection method between the second output shaft 253 and the second pretensioning component 320 and the second winding wheel 120 is essentially the same as the connection method between the first output shaft 243 and the first pretensioning component 310 and the first winding wheel 110, and will not be repeated hereafter.

[0117] See Figure 5 , Figure 6 , Figures 11 to 16 In one embodiment, the drive mechanism 200 further includes a clutch assembly 230, which is driveably connected to the output end of the drive assembly 220 and is engaged and disengaged with the first output assembly 240 and the second output assembly 250 to drive the first output assembly 240 or the second output assembly 250 to rotate. The clutch assembly 230 has a disengaged position, a first engaged position, and a second engaged position. In the disengaged position, the clutch assembly 230 is separated from the first output assembly 240 and the second output assembly 250. In the first engaged position, the clutch assembly 230 engages with the first output assembly 240 and disengages from the second output assembly 250. In the second engaged position, the clutch assembly 230 engages with the second output assembly 250 and disengages from the first output assembly 240. The drive assembly 220 can drive the clutch assembly 230 to move, thereby switching the clutch assembly 230 between the disengaged position, the first engaged position, and the second engaged position.

[0118] The clutch assembly 230 is rotatably disposed in the support housing 210 and can enable the drive wheel 222 to engage or disengage with the first transition wheel 241 in the first output assembly 240 or the second transition wheel 251 in the second output assembly 250. Thus, the drive assembly 220 engages with the clutch assembly 230 via the drive wheel 222, thereby enabling the clutch assembly 230 to engage or disengage with the first output assembly 240 or the second output assembly 250, so that the first output assembly 240 and the second output assembly 250 perform corresponding actions.

[0119] Specifically, when the clutch assembly 230 is in the disengaged position, it is separated from the first output assembly 240 (hereinafter referred to as the first transition wheel 241 and the first output wheel 242) and the second output assembly 250 (hereinafter referred to as the second transition wheel 251 and the second output wheel 252) and located between the first transition wheel 241 and the second transition wheel 251. At this time, the drive component 221 is in the clutch state, and both the first output wheel 242 and the second output wheel 252 can rotate freely. The user can freely pull the curtain body, that is, the electric curtain 1 can be manually opened or manually closed.

[0120] When the clutch assembly 230 is in the first engagement position, it engages with the first transition wheel 241 and disengages from the second transition wheel 251. When the drive component 221 controls the drive wheel 222 to rotate, the drive wheel 222 drives the clutch assembly 230 to rotate, which in turn drives the first transition wheel 241 to rotate. The first transition wheel 241 then drives the first output wheel 242 to rotate. The first output wheel 242 drives the first winding wheel 110 and the pre-tensioning shaft 312 of the first pre-tensioning assembly 310 to rotate via the first output shaft 243, so that the first winding wheel 110 winds the traction rope 70. At the same time, the first winding wheel 110 pulls the second winding wheel 120 to rotate via the traction rope 70, so that the second winding wheel 120 releases the traction rope 70, thereby realizing the automatic closing of the electric curtain 1.

[0121] When the clutch assembly 230 is in the second engagement position, it engages with the second transition wheel 251 and disengages from the first transition wheel 241. When the drive component 221 controls the drive wheel 222 to rotate, the drive wheel 222 drives the clutch assembly 230 to rotate, which in turn drives the second transition wheel 251 to rotate. The second transition wheel 251 then drives the second output wheel 252 to rotate. The second output wheel 252 drives the second winding wheel 120 and the pre-tensioning shaft 312 of the second pre-tensioning assembly 320 to rotate via the second output shaft 253, so that the second winding wheel 120 winds the traction rope 70. At the same time, the second winding wheel 120 pulls the first winding wheel 110 to rotate via the traction rope 70, so that the first winding wheel 110 releases the traction rope 70, thereby realizing the automatic opening of the electric curtain 1.

[0122] Thus, through the transmission engagement or disengagement of the clutch assembly 230 with the first output assembly 240 or the second output assembly 250, the automatic opening and closing control of the curtain body can be realized, thereby realizing the automatic opening and closing of the electric curtain 1. At the same time, it can also realize the switching between manual and automatic modes of the electric curtain 1. In the event of power failure or malfunction of the drive component 221, the curtain body can be opened or closed manually to meet the usage requirements of different working conditions.

[0123] It is worth noting that the clutch assembly 230 of this application is disposed in the support housing 210 by rotation. The clutch assembly 230 switches between the disengaged position, the first engaged position and the second engaged position to engage or disengage with the first transition wheel 241 or the second transition wheel 251.

[0124] Of course, in other embodiments of this application, the clutch assembly 230 can be implemented in a movable manner. The clutch assembly 230 is movably mounted on the second support shell 212 by means of a linear motor or cylinder, etc. The drive assembly 220 can move synchronously with the clutch assembly 230, and its drive wheel 222 is in transmission cooperation with the clutch assembly 230. Furthermore, when the clutch assembly 230 moves, it can also be in transmission cooperation or disengagement with the first transition wheel 241 or the second transition wheel 251 to realize the switching of the clutch assembly 230 in the disengagement position, the first engagement position and the second engagement position, so as to control the working state of the electric curtain 1.

[0125] The clutch assembly 230 can adopt the structure of the first transition wheel 241 to realize the transmission of motion. This application only describes the clutch assembly 230 being rotatably mounted on the support housing 210 as an example.

[0126] See Figures 12 to 16 In one embodiment, the clutch assembly 230 includes a first clutch wheel 231 and a second clutch wheel 232. The first clutch wheel 231 is rotatably disposed on the support housing 210 and is connected to the output end of the drive assembly 220. The second clutch wheel 232 is disposed on the first clutch wheel 231, and its center is offset from the rotation center of the first clutch wheel 231. It rotates with the first clutch wheel 231 so that the second clutch wheel 232 can engage or disengage from the first transition wheel 241 of the first output assembly 240 and the second transition wheel 251 of the second output assembly 250.

[0127] The first clutch wheel 231 is rotatably disposed in the support housing 210 and engages with the drive wheel 222. The second clutch wheel 232 is disposed at the rotation center of the first clutch wheel 231, and the center of the second clutch wheel 232 is offset from the rotation center of the first clutch wheel 231. When the drive wheel 222 drives the first clutch wheel 231 to rotate, the first clutch wheel 231 can drive the second clutch wheel 232 to rotate. Thus, the second clutch wheel 232 can engage or disengage from the first transition wheel 241 or the second transition wheel 251, realizing the transmission engagement or disengagement of the drive assembly 220 with the first output assembly 240 or the second output assembly 250.

[0128] See Figures 12 to 16 In one embodiment, the clutch assembly 230 further includes a third clutch wheel 233, a first connecting shaft 234, and a support arm 235. The third clutch wheel 233 is coaxially connected to the first clutch wheel 231. The first connecting shaft 234 is axially disposed on the third clutch wheel 233. The support arm 235 connects the first connecting shaft 234 and the second clutch wheel 232 radially along the third clutch wheel 233, so that the first connecting shaft 234 drives the second clutch wheel 232 to rotate with the third clutch wheel 233 through the support arm 235.

[0129] A first connecting shaft 234 is fixedly disposed at the rotation center of the first clutch wheel 231 and the rotation center of the third clutch wheel 233. A support arm 235 is fixedly connected to the first connecting shaft 234, extending radially along the first clutch wheel 231. A second clutch wheel 232 is rotatably disposed on the support arm 235, and the second clutch wheel 232 and the third clutch wheel 233 are in a transmission engagement. When the drive assembly 220 drives the first clutch wheel 231 to rotate via the drive wheel 222, the first clutch wheel 231 can drive the first connecting shaft 234 and the third clutch wheel 233 to rotate synchronously. Consequently, the first connecting shaft 234 can drive the support arm 235 to rotate around the rotation center of the first clutch wheel 231. Thus, the support arm 235 can drive the second clutch wheel 232 to rotate around the rotation center of the first clutch wheel 231, and the second clutch wheel 232 can engage or disengage with the first transition wheel 241 or the second transition wheel 251.

[0130] Furthermore, when the second clutch wheel 232 engages with the first transition wheel 241, the support arm 235 cannot pass over the first transition wheel 241 because the first transition wheel 241 stops the second clutch wheel 232. The first transition wheel 241 and the second clutch wheel 232 remain engaged. At this time, the drive wheel 222 can continue to drive the first connecting shaft 234 and the third clutch wheel 233 to rotate via the first clutch wheel 231. Consequently, the third clutch wheel 233 can drive the second clutch wheel 232 to rotate, and the second clutch wheel 232 drives the first transition wheel 241 to rotate, thus driving the rotation of the first output wheel 242. It is worth noting that the engagement principle of the second clutch wheel 232 and the second transition wheel 251 is essentially the same, and will not be elaborated further in this application. Optionally, the first clutch wheel 231, the second clutch wheel 232, and the third clutch wheel 233 are all gears.

[0131] See Figures 12 to 16 In one embodiment, the clutch assembly 230 further includes a second connecting shaft 236, which is fixedly disposed on the support arm 235, and the second clutch wheel 232 is rotatably disposed on the second connecting shaft 236. That is, the second connecting shaft 236 is a component that supports and connects the second clutch wheel 232, so that the second clutch wheel 232 is rotatably disposed on the support arm 235.

[0132] See Figures 1 to 5 In one embodiment, the drive device 10 further includes a mounting housing 400, in which both the winding mechanism 100 and the drive mechanism 200 are disposed. The mounting housing 400 is the outer casing of the entire drive device 10. The mounting housing 400 protects the movement of the winding mechanism 100 and the drive mechanism 200 from external parts, and also prevents dust and other contaminants from entering the mounting housing 400.

[0133] The mounting housing 400 of this application can integrate all the components of the drive device 10, making the drive device 10 a whole and facilitating its installation. Furthermore, when the drive device 10 of this application is directly used with an existing curtain structure, the drive device 10 can be directly installed onto the curtain structure and connected to the pull rope 70, thus applying the drive device 10 to the existing curtain structure without the need to dismantle it.

[0134] See Figures 1 to 5In one embodiment, the mounting housing 400 includes a first half-shell 410 and a second half-shell 420, which enclose a receiving space in which the winding mechanism 100 and the drive mechanism 200 are disposed. This design of the first half-shell 410 and the second half-shell 420 facilitates the installation of the winding mechanism 100 and the drive mechanism 200, while also providing protection for them. Optionally, the first half-shell 410 and the second half-shell 420 are connected and fixed by screws or by clips or the like. Furthermore, the mounting housing 400 is fixed to the second half-shell 420 by screws or the like.

[0135] See Figure 1 , Figure 4 and Figure 5 In one embodiment, the drive device 10 further includes a control motherboard 500, which is electrically connected to the drive component 220. The control motherboard 500 is the main control board of the drive device 10. The control motherboard 500 is disposed in the mounting housing 400 and electrically connected to the drive component 221 to control the operation of the drive component 221. The control motherboard 500 can realize intelligent control of the drive mechanism 200, so that the drive component 220 can selectively cooperate with the first output component 240 or the second output component 250, thereby realizing the automatic opening or closing control of the electric curtain 1.

[0136] See Figure 1 , Figure 4 and Figure 5 In one embodiment, the drive device 10 further includes a power supply element 600, which is electrically connected to the drive assembly 220. The power supply element 600 provides power to the drive device 10 and powers the operation of the drive assembly 220. Optionally, the power supply element 600 may be a rechargeable battery or the like.

[0137] See Figures 1 to 16 The following describes the working state of the electric curtain 1 in conjunction with the components of the drive device 10 mentioned above:

[0138] When the electric curtain 1 is in its initial state, the clutch assembly 230 is centered and in the disengaged position. The second clutch wheel 232 is separated from the first transition wheel 241 and the second transition wheel 251, and both the first output wheel 242 and the second output wheel 252 can rotate freely. Figure 14As shown, the two ends of the traction rope 70 pass through the mounting housing, with one end wound around the first winding wheel 110 and the other end wound around the second winding wheel 120. The curtain body is fixed to the traction rope 70. The first pretensioning assembly 310 and the second pretensioning assembly 320 can be tightened by the elastic member 311, so as to pretension the first winding wheel 110 and the second winding wheel 120 through the first output shaft 243 and the second output shaft 253, thereby keeping the traction rope 70 taut and preventing the traction rope 70 from slack.

[0139] When the electric curtain 1 opens automatically, the drive component 221 is energized and operates, and the clutch assembly 230 rotates counterclockwise to engage the second clutch wheel 232 with the second transition wheel 251. Figure 15 As shown, the second transition wheel 251 drives the second output wheel 252 to rotate counterclockwise. The second output wheel 252 drives the pre-tensioning shaft 312 of the second pre-tensioning assembly 320 and the second winding wheel 120 to rotate via the second output shaft 253, so that the second winding wheel 120 winds the traction rope 70, and the traction rope 70 drives the curtain body to gradually open. During this process, the second pre-tensioning assembly 320 gradually retracts its corresponding elastic element 311 via the pre-tensioning shaft 312 to gradually reduce the pre-tensioning force of the second pre-tensioning assembly 320. At the same time, the second winding wheel 120 pulls the first winding wheel 110 via the traction rope 70, so that the first winding wheel 110 rotates counterclockwise and releases the traction rope 70. When the first winding wheel 110 rotates counterclockwise, the first winding wheel 110 drives the pre-tensioning shaft 312 of the first pre-tensioning assembly 310 to rotate via the first output shaft 243, so that the pre-tensioning shaft 312 stretches its corresponding elastic element 311 to gradually increase the pre-tensioning force of the first pre-tensioning assembly 310. When the curtain body is fully opened, the first pretensioning component 310 is fully tightened, the second pretensioning component 320 is partially tightened, and the first pretensioning component 310 and the second pretensioning component 320 tension the traction rope 70, so the electric curtain 1 is in the open state.

[0140] When the electric curtain 1 closes automatically, the drive component 221 is energized and operates, and the clutch assembly 230 rotates clockwise to engage the second clutch wheel 232 with the first transition wheel 241. Figure 16As shown, the first transition wheel 241 drives the first output wheel 242 to rotate clockwise. The first output wheel 242 drives the pre-tensioning shaft 312 of the first pre-tensioning assembly 310 and the first winding wheel 110 to rotate via the first output shaft 243, so that the first winding wheel 110 winds the traction rope 70, and the traction rope 70 drives the curtain body to gradually close. During this process, the first pre-tensioning assembly 310 gradually retracts its corresponding elastic element 311 via the pre-tensioning shaft 312 to gradually reduce the pre-tensioning force of the first pre-tensioning assembly 310. At the same time, the first winding wheel 110 pulls the second winding wheel 120 via the traction rope 70, so that the second winding wheel 120 rotates clockwise and releases the traction rope 70. When the second winding wheel 120 rotates clockwise, the second winding wheel 120 drives the pre-tensioning shaft 312 of the second pre-tensioning assembly 320 to rotate via the second output shaft 253, so that the pre-tensioning shaft 312 stretches its corresponding elastic element 311 to gradually increase the pre-tensioning force of the second pre-tensioning assembly 320. When the curtain body is fully closed, the second pretensioning component 320 is fully tensioned, the first pretensioning component 310 is partially tensioned, and the first pretensioning component 310 and the second pretensioning component 320 tension the traction rope 70, so the electric curtain 1 is in the closed state.

[0141] When the electric curtain 1 is manually opened, it is in its initial state. The clutch assembly 230 is in the disengaged position, and the second clutch wheel 232 is separated from the first transition wheel 241 and the second transition wheel 251. Both the first output wheel 242 and the second output wheel 252 can rotate freely. When the curtain body is manually pulled, it can move the traction rope 70. Due to the tension of the traction rope 70 by the first pretension assembly 310 and the second pretension assembly 320, after applying manual pulling force to the traction rope 70, the second pretension assembly 320 gradually retracts its corresponding elastic element 311 through the pretension shaft 312 to gradually reduce the pretension force of the second pretension assembly 320. At the same time, the first pretension assembly 310 stretches its corresponding elastic element 311 through the pretension shaft 312 to gradually increase the pretension force of the first pretension assembly 310. When the electric curtain 1 is manually opened, the first pretension assembly 310 is fully tensioned, and the second pretension assembly 320 is partially tensioned. It is worth noting that manually closing the electric curtain 1 is the reverse process of manually opening the curtain body, which will not be explained here.

[0142] The drive device 10 of this application can selectively engage or disengage with the first output component 240 and the second output component 250 via the drive assembly 220 to control the rotation or stop of the first output component 240 and the second output component 250, while the first pretensioning assembly 310 and the second pretensioning assembly 320 maintain tension on the traction rope 70. When the drive assembly 220 is engaged with the first output component 240 or the second output component 250, the first winding wheel 110 and the second winding wheel 120 can wind or release the traction rope 70 to drive the traction rope 70 to move, thereby controlling the automatic opening or closing of the electric curtain 1. When the drive assembly 220 is disengaged from the first output component 240 and the second output component 250, the electric curtain 1 can be manually opened or closed. This avoids the situation where the electric curtain 1 cannot be opened when the drive device 10 is powered off or malfunctions, ensuring that the electric curtain 1 can be freely opened or closed under any circumstances, facilitating user operation.

[0143] See Figure 1 This application also provides an electric curtain 1, including a traction rope 70, a curtain body, and a drive device 10 as described in any of the above embodiments. The drive device 10 is connected to the traction rope 70 via a first winding wheel 110 and a second winding wheel 120. The curtain body is disposed on the traction rope 70 and corresponds to the first winding wheel 110 or the second winding wheel 120. The drive device 10 can drive the traction rope 70 to move, so that the traction rope 70 drives the curtain body to open or close. After adopting the drive device 10 of the above embodiments, the electric curtain 1 of this application can realize the automatic opening, automatic closing, manual opening, or manual closing of the curtain body, so that the electric curtain 1 can be freely opened or closed under any circumstances, which is convenient for users.

[0144] In one embodiment of this application, the number of curtain bodies is one, that is, the electric curtain 1 is a single-opening structure. In this case, the curtain body is set on the traction rope 70, and the traction rope 70 drives the curtain body to move, thereby opening or closing the electric curtain 1. In another embodiment of this application, the number of curtain bodies is two, and generally the traction rope 70 has a folded-back structure, such as... Figure 1 As shown, the curtain body is set on the two opposite sides of the traction rope 70. When the drive device 10 drives the traction rope 70 to move, the two sides of the traction rope 70 can move in opposite directions, so that the two curtain bodies move closer to each other or further away from each other, thereby realizing the closing and opening of the electric curtain 1.

[0145] Furthermore, the drive device 10 of this application can be adapted to existing curtain structures, meaning that there is no need to modify the existing curtain structure; the drive device 10 can be directly installed on the existing curtain structure, and the traction rope 70 can be connected to the first winding wheel 110 and the second winding wheel 120. In this way, the drive device 10 can realize the automatic opening or closing of the existing curtain structure without removing the original curtain structure, reducing modification costs and increasing the application range of the drive device 10.

[0146] 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.

[0147] 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 driving device, characterized in that, include: The winding mechanism includes a first winding wheel and a second winding wheel, which are used to wind the traction rope of an electric curtain. as well as The drive mechanism includes a support housing and a drive assembly, a first output assembly, and a second output assembly rotatably connected to the support housing. The first output assembly is coaxially connected to the first winding wheel and drives the first winding wheel to rotate to wind the traction rope. The second output assembly is coaxially arranged with the second winding wheel and drives the second winding wheel to rotate to wind the traction rope. The drive assembly can selectively engage or disengage with the first output assembly and the second output assembly to drive the first output assembly or the second output assembly to rotate.

2. The driving device according to claim 1, characterized in that, The drive device further includes a pre-tensioning mechanism, which includes a first pre-tensioning component and / or a second pre-tensioning component; The first pretensioning component is disposed on the support housing and located on the side of the support housing opposite to the first winding wheel. The first pretensioning component is coaxially connected to the first output component and moves with the first output component to tension the traction rope. The second pretensioning component is disposed on the support housing and located on the side of the support housing opposite to the second winding wheel. The second pretensioning component is coaxially connected to the second output component and moves with the second output component to tension the traction rope.

3. The driving device according to claim 2, characterized in that, The first pre-tightening assembly includes an elastic element, a pre-tightening shaft, and a pre-tightening housing. The pre-tightening housing is disposed on the support housing, and the pre-tightening shaft is rotatably disposed on the pre-tightening housing and connected to the output end of the first output assembly. The elastic element is disposed in the pre-tightening housing, with one end connected to the pre-tightening housing and the other end connected to the pre-tightening shaft. The structure of the second pretensioning component is the same as that of the first pretensioning component.

4. The driving device according to claim 1, characterized in that, The first output component includes a first transition wheel, a first output wheel, and a first output shaft. The first output shaft extends rotatably through the support housing. The first output shaft is axially disposed on the first output wheel and coaxially connected to the first winding wheel. The first transition wheel is rotatably disposed on the support housing and is drively connected to the first output shaft. And / or, the second output component includes a second transition wheel, a second output wheel, and a second output shaft. The second output shaft extends rotatably through the support housing. The second output shaft is axially disposed on the second output wheel and coaxially connected to the second winding wheel. The second transition wheel is rotatably disposed on the support housing and is drively connected to the second output shaft.

5. The driving device according to claim 4, characterized in that, The first output shaft has two ends passing through the support housing for output. The two ends of the first output shaft have a first connecting part and a second connecting part respectively. The first connecting part is used to coaxially connect the first output shaft to the first pre-tightening assembly, and the second connecting part is used to coaxially connect the first output shaft to the first winding wheel. The first connecting part and the second connecting part are one of the following: connecting protrusion, connecting key and connecting recess. And / or, the two ends of the second output shaft pass through the support housing for output, and the two ends of the second output shaft respectively have a third connecting part and a fourth connecting part. The third connecting part is used to coaxially connect the second output shaft to the second pre-tightening assembly, and the fourth connecting part is used to coaxially connect the second output shaft to the second winding wheel. The third connecting part and the fourth connecting part are one of the following: connecting protrusion, connecting key and connecting recess.

6. The driving device according to claim 1, characterized in that, The drive assembly includes a drive component and a drive wheel. The drive component is disposed on the support housing, and the drive wheel is disposed at the output end of the drive component and is connected in transmission with the first output component and the second output component. And / or, the support housing includes a first support housing and a second support housing, the first support housing and the second support housing enclose an installation space, the first output component and the second output component are located in the installation space, and the driving component of the driving component is disposed on the second support housing and extends through the second support housing; And / or, the drive device further includes a mounting housing, in which both the winding mechanism and the drive mechanism are disposed; And / or, the drive device further includes a control motherboard, the control motherboard being electrically connected to the drive assembly; And / or, the drive device further includes a power supply element electrically connected to the drive assembly.

7. The driving device according to any one of claims 1 to 6, characterized in that, The drive mechanism further includes a clutch assembly, which is driven to the output end of the drive assembly and is engaged and disengaged with the first output assembly and the second output assembly to drive the first output assembly or the second output assembly to rotate. The clutch assembly has a disengagement position, a first engagement position, and a second engagement position. The clutch assembly is disengaged from the first output assembly and the second output assembly in the disengagement position. The clutch assembly engages with the first output assembly and disengages from the second output assembly in the first engagement position. The clutch assembly engages with the second output assembly and disengages from the first output assembly in the second engagement position. The drive assembly can drive the clutch assembly to move, so that the clutch assembly switches between the disengaged position, the first engaged position and the second engaged position.

8. The driving device according to claim 7, characterized in that, The clutch assembly includes a first clutch wheel and a second clutch wheel. The first clutch wheel is rotatably disposed on the support housing and is drively connected to the output end of the drive assembly. The second clutch wheel is disposed on the first clutch wheel, and its center is offset from the rotation center of the first clutch wheel. It rotates with the first clutch wheel so that the second clutch wheel can engage or disengage with the first transition wheel of the first output assembly and the second transition wheel of the second output assembly.

9. The driving device according to claim 8, characterized in that, The clutch assembly further includes a third clutch wheel, a first connecting shaft, and a support arm. The third clutch wheel is coaxially connected to the first clutch wheel. The first connecting shaft is axially disposed on the third clutch wheel. The support arm connects the first connecting shaft and the second clutch wheel radially along the third clutch wheel, so that the first connecting shaft drives the second clutch wheel to rotate with the third clutch wheel through the support arm.

10. An electric curtain, characterized in that, Includes a traction rope, a curtain body, and a drive device as described in any one of claims 1 to 9; The drive device is connected to the traction rope via a first winding wheel and a second winding wheel. The curtain body is disposed on the traction rope and corresponds to the first winding wheel or the second winding wheel. The drive device can drive the traction rope to move so that the traction rope drives the curtain body to open or close.

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