Pre-tightening device and electric curtain

Abstract

The utility model relates to a pre-tightening device and an electric curtain. The pre-tightening device is used for connecting the two ends of a traction rope in the electric curtain and comprises a supporting mechanism, a driving mechanism and a pre-tightening mechanism, and the supporting mechanism is connected to one end of the traction rope; the reel is rotatably arranged in the supporting mechanism and is connected with the other end of the traction rope in a winding manner; and the pre-tightening mechanism is arranged in the supporting mechanism and connected with the winding wheel, the pre-tightening mechanism can apply pre-tightening force to the winding wheel, and the pre-tightening force applied by the pre-tightening mechanism can enable the winding wheel to rotate so that the traction rope can be wound on the winding wheel. Thus, when the electric curtain is in the electric mode, the pre-tightening mechanism can tension the traction rope, and the traction rope is prevented from loosening. When the electric curtain is in the manual mode, the pre-tightening mechanism can wind the pulling rope, the pulling rope is prevented from falling down when the electric curtain is manually opened or closed, potential safety hazards are reduced, and the electric curtain is convenient for a user to use.

Description

Technical Field

[0001] This application relates to the field of smart home technology, and in particular to a pre-tensioning 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 motorized curtains consist of a drive unit, a transmission assembly, and the curtain itself. The drive unit moves the transmission assembly, which in turn moves the curtain, thus opening and closing the curtain. The transmission assembly is typically a pull cord, on which the curtain is mounted.

[0005] When the drive unit moves, it applies force to the traction rope, causing the rope to move and thus controlling the opening or closing of the electric curtains. However, when opening or closing the curtains manually, the traction rope may droop, posing a safety hazard. Utility Model Content

[0006] Therefore, it is necessary to provide a pre-tensioning device and an electric curtain to address the safety hazard caused by the drooping of the traction rope when the electric curtain is opened or closed in manual mode. This device can prevent the traction rope from drooping in manual mode and reduce the safety hazard.

[0007] A pre-tensioning device for connecting the two ends of a traction rope in an electric curtain, the pre-tensioning device comprising:

[0008] A support mechanism is connected to one end of the traction rope;

[0009] A winding reel, rotatably mounted in the support mechanism, and wound around the other end of the traction rope; and

[0010] A pre-tensioning mechanism is disposed in the support mechanism and connected to the winding wheel. The pre-tensioning mechanism can apply a pre-tensioning force to the winding wheel, and the pre-tensioning force applied by the pre-tensioning mechanism can cause the winding wheel to rotate so that the winding wheel winds the traction rope.

[0011] In one embodiment of this application, the pre-tightening mechanism includes an elastic element and a pre-tightening shaft. The elastic element is movably disposed in the support mechanism, with one end of the elastic element fixed to the support mechanism and the other end connected to the pre-tightening shaft.

[0012] The preload shaft is coaxially connected to the winding wheel and rotates synchronously with the winding wheel to apply a preload force to the winding wheel.

[0013] In one embodiment of this application, the pre-tightening shaft includes a first connecting shaft and a second connecting shaft, wherein the first connecting shaft and the second connecting shaft are coaxially arranged;

[0014] The first connecting shaft is connected to the elastic element, and the second connecting shaft is connected to the shaft hole of the winding wheel.

[0015] In one embodiment of this application, the preload shaft further includes a first mating portion disposed on the outer wall of the second connecting shaft, and the winding wheel has a second mating portion disposed in the shaft hole;

[0016] The second connecting shaft is disposed in the shaft hole, and the first mating part is installed correspondingly to the first mating part, so that the winding wheel and the elastic element move synchronously or remain stationary synchronously through the pre-tightening shaft;

[0017] The first mating part and the second mating part are mating structures with protrusions and recesses; or, the first mating part and the second mating part are both recessed and connected by a connecting key.

[0018] In one embodiment of this application, the pre-tightening mechanism further includes a positioning element disposed in the support mechanism, the positioning element being used to fix the other end of the elastic element;

[0019] And / or, the elastic element is a coil spring, the center end of which is connected to the preload shaft and the outer end of which is fixed to the support mechanism; or, the elastic element is a torsion spring, which is connected to the preload shaft and one arm of which is fixed to the support mechanism.

[0020] In one embodiment of this application, the pre-tightening mechanism further includes a partition plate, which is disposed in the support mechanism and located above the elastic member;

[0021] The partition plate is used to separate the elastic element from the winding wheel and to support the winding wheel.

[0022] In one embodiment of this application, the partition plate has a recessed first mounting groove on the side facing the winding wheel, the first mounting groove being used to accommodate a portion of the winding wheel;

[0023] And / or, the partition plate has a recessed second mounting groove on the side facing the elastic member, the second mounting groove being used to accommodate a portion of the elastic member;

[0024] And / or, the partition plate has a protrusion on the side facing the winding wheel, the winding wheel has a fixing hole, the protrusion is coaxially arranged with the fixing hole, and the protrusion can be installed in the fixing hole to position the winding wheel.

[0025] In one embodiment of this application, the support mechanism includes a support housing and a support base, wherein the support housing covers the support base and encloses an accommodating space;

[0026] The pre-tightening mechanism is disposed on the support base and located in the receiving space, and the winding wheel is located in the receiving space and disposed on the side of the pre-tightening mechanism away from the support base;

[0027] One end of the traction rope is fixed to the support housing, and the other end of the traction rope passes through the support housing and is wound around and connected to the winding reel.

[0028] In one embodiment of this application, the support base has a recessed fixing groove for accommodating a portion of the elastic element of the pre-tightening mechanism;

[0029] And / or, the support mechanism further includes a fixing member disposed on the support housing, the fixing member being used to connect a pulley to slidably fix the pretensioning device to the guide rail of the electric curtain.

[0030] An electric curtain includes a drive unit, a traction rope, a guide rail, a curtain body, and a pre-tensioning device as described in any of the above technical features;

[0031] The driving device is disposed on the guide rail, the pretensioning device is slidably disposed on the guide rail and connected to both ends of the traction rope, and the traction rope is movably disposed on the guide rail and connected to the driving device;

[0032] The curtain body is fixed to the pretensioning device and / or the traction rope.

[0033] In one embodiment of this application, when the electric curtain is in electric mode, the driving device drives the traction rope to move, so that the traction rope drives the curtain body to open or close.

[0034] When the electric curtain is in manual mode, the pretensioning force applied by the pretensioning mechanism can drive the winding wheel to rotate, causing the winding wheel to wind the traction rope.

[0035] By adopting the above technical solution, this application has at least the following technical effects:

[0036] The pre-tensioning device and electric curtain of this application, wherein in the pre-tensioning device, the winding wheel and the pre-tensioning mechanism are coaxially connected and disposed in the support mechanism, one end of the traction rope is fixed to the support mechanism, and the other end passes through the support mechanism and is wound and connected to the winding wheel. The pre-tensioning mechanism can provide pre-tension force to the winding wheel. When the electric curtain is in electric mode, the pre-tensioning force applied to the winding wheel by the pre-tensioning mechanism keeps the winding wheel stationary. At this time, the support mechanism can drive the winding wheel and the pre-tensioning mechanism to move synchronously with the traction rope. When the electric curtain is in manual mode, the pre-tensioning force applied to the winding wheel by the pre-tensioning mechanism can cause the winding wheel to rotate, thereby allowing the winding wheel to wind the traction rope.

[0037] This pre-tensioning device uses a support mechanism connected to a winding reel to connect the traction rope, and a pre-tensioning mechanism within the support mechanism applies pre-tension to the winding reel. When the electric curtain is in electric mode, the pre-tensioning mechanism tensions the traction rope, preventing it from slack. When the electric curtain is in manual mode, the pre-tensioning mechanism winds the traction rope, preventing it from sagging when the curtain is manually opened or closed, reducing safety hazards and facilitating user operation. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of an embodiment of an electric curtain according to this application.

[0039] Figure 2 for Figure 1 A perspective view of the pretensioning device in the electric blind shown.

[0040] Figure 3 for Figure 2 An exploded view of the pre-tightening device is shown.

[0041] Figure 4 for Figure 2 A top view of the pre-tightening device shown.

[0042] Figure 5 for Figure 4 The pre-tightening device shown is a cross-sectional view along the AA direction.

[0043] Figure 6 for Figure 3 A schematic diagram of the preload shaft in the preload device shown.

[0044] Figure 7 for Figure 3 A schematic diagram of the winding wheel in the pre-tightening device from one perspective.

[0045] Figure 8 for Figure 7 The diagram shows the winding reel from another perspective.

[0046] Figure 9 for Figure 7 The image shows a bottom view of the winding reel.

[0047] Figure 10 for Figure 7 The side view of the winding reel shown.

[0048] Figure 11 for Figure 10 The diagram shows a cross-sectional view of the winding reel along the BB direction.

[0049] Figure 12 for Figure 3 A schematic diagram of the support base in the pre-tightening device shown.

[0050] Figure 13 for Figure 3 A schematic diagram of the partition plate in the pre-tightening device shown from one perspective.

[0051] Figure 14 for Figure 13 The diagram shows the partition from another perspective.

[0052] Among them: 10, electric curtain; 100, pre-tightening device; 110, support mechanism; 111, support housing; 112, support base; 1121, fixing groove; 113, fixing part; 120, winding wheel; 121, shaft hole; 122, second mating part; 123, fixing hole; 130, pre-tightening mechanism; 131, elastic element; 132, pre-tightening shaft; 1321, first connecting shaft; 1322, second connecting shaft; 1323, first mating part; 133, positioning part; 134, partition plate; 1341, first mounting groove; 1342, second mounting groove; 1343, protrusion; 200, traction rope; 300, drive device; 400, guide rail. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] Understandably, motorized curtains are a representative product of smart homes. Currently, common motorized curtains include 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. The transmission component is typically a pull rope, to which the curtain is attached. When the drive unit moves, it applies force to the pull rope, causing the rope to move the curtain, thus controlling its opening and closing. However, when opening or closing the curtains manually, the pull rope may sag, posing a safety hazard.

[0060] For this purpose, please refer to Figures 1 to 3 This application provides a pretensioning device 100, which is applied to an electric curtain 10 and connected to the traction rope 200 of the electric curtain 10 to achieve tensioning of the traction rope 200. Figure 1 This is a schematic diagram of an electric curtain 10 according to an embodiment of this application. Figure 2 for Figure 1 The diagram shows a perspective view of the pretensioning device 100 in the electric curtain 10. Figure 3 for Figure 2 An exploded view of the pre-tightening device 100 shown.

[0061] like Figure 1 As shown, the electric curtain 10 includes a drive unit 300, a guide rail 400, a curtain body (not shown), and a pre-tensioning device 100 as described in this application. The drive unit 300 is mounted on the guide rail 400, the traction rope 200 is connected to the drive unit 300, the pre-tensioning device 100 is mounted on the traction rope 200 and is wound around the traction rope 200 to tension the traction rope 200, and the curtain body is mounted on the traction rope 200.

[0062] When the drive device 300 drives the traction rope 200 to move, the traction rope 200 can drive the curtain body to move synchronously, realizing the automatic opening or closing of the electric curtain 10. When manual opening or closing is required, the user pulls the traction rope 200 through the curtain body, and the pre-tensioning device 100 can wind or release the traction rope 200 to prevent the traction rope 200 from sagging and to prevent the traction rope 200 from becoming slack.

[0063] Of course, in other embodiments of this application, the pretensioning device 100 can also be applied to other structures using rope control to achieve rope tension and prevent rope slack. In the following description of the specific structure of the pretensioning device 100, only its application to the electric curtain 10 will be used as an example.

[0064] The pre-tensioning device 100 of this application can tension the traction rope 200 and prevent it from slack. When the electric curtain 10 is in manual mode, the pre-tensioning device 100 can wind the traction rope 200 to prevent it from drooping when the electric curtain 10 is manually opened or closed, reducing safety hazards and making it easier for users to use.

[0065] See Figures 1 to 3 In one embodiment, one end of the traction rope 200 is fixed to the pretensioning device 100, and the other end is wound or releasably connected to the pretensioning device 100. When the electric curtain 10 is in electric mode, due to the tension of the traction rope 200 by the drive device 300 and the pretensioning device 100, when the drive device 300 drives the traction rope 200 to move, it can directly pull the pretensioning device 100 and the curtain body to move through the traction rope 200, thereby realizing the automatic opening or closing of the curtain body.

[0066] When the electric curtain 10 is in manual mode, the user pulls the curtain body, which in turn pulls the pull rope 200. The drive device 300 can release the pull rope 200, and the length of the pull rope 200 increases. At this time, the pre-tensioning device 100 can wrap around the pull rope 200 to prevent the pull rope 200 from slack and sagging, reducing safety hazards and enabling the curtain body to be opened or closed manually.

[0067] See Figures 2 to 5 In one embodiment, the pretensioning device 100 includes a support mechanism 110, a winding reel 120, and a pretensioning mechanism 130. The support mechanism 110 is connected to one end of the traction rope 200, and the winding reel 120 is rotatably disposed in the support mechanism 110 and wound around the other end of the traction rope 200. The pretensioning mechanism 130 is disposed in the support mechanism 110 and connected to the winding reel 120. The pretensioning mechanism 130 can apply a pretensioning force to the winding reel 120, and the pretensioning force applied by the pretensioning mechanism 130 can cause the winding reel 120 to rotate so that the winding reel 120 winds the traction rope 200. Figure 4 for Figure 2 The top view of the pre-tightening device 100 shown. Figure 5 for Figure 4 The pre-tightening device 100 shown is a cross-sectional view along the AA direction.

[0068] The support mechanism 110 serves as the outer housing of the pretensioning device 100. Both the winding wheel 120 and the pretensioning mechanism 130 of the pretensioning device 100 are housed within the support mechanism 110. The support mechanism 110 integrates the winding wheel 120 and the pretensioning mechanism 130 into a single unit, facilitating the assembly and connection of the pretensioning device 100 with the traction rope 200. Simultaneously, the support mechanism 110 also protects the winding wheel 120 and the pretensioning mechanism 130, preventing interference between the traction rope 200 or other external components and the winding wheel 120 and pretensioning mechanism 130, thus ensuring the reliability of the pretensioning mechanism 130's operation.

[0069] The winding reel 120 and the support mechanism 110 are components of the pretensioning device 100 that connect to the traction rope 200. The winding reel 120 is rotatably disposed in the support mechanism 110. One end of the traction rope 200 is fixed to the support mechanism 110, and the other end of the traction rope 200 is wound around the winding reel 120. When the winding reel 120 rotates, it can wind or release the traction rope 200. The pretensioning mechanism 130 is disposed in the support mechanism 110 and connected to the winding reel 120.

[0070] The pretensioning mechanism 130 can tighten the traction rope 200. When the pretensioning mechanism 130 cooperates with the drive device 300, it can tighten the traction rope 200. The tension of the traction rope 200 after tightening can limit the rotation of the winding pulley 120, ensuring that the traction rope 200 remains taut. Understandably, if the traction rope 200 becomes slack, the pretensioning mechanism 130 can drive the winding pulley 120 to rotate, causing the winding pulley 120 to wind the traction rope 200, thus maintaining the traction rope 200 in a taut state.

[0071] When the electric curtain 10 is in electric mode, the pre-tensioning mechanism 130 tensions the traction rope 200. When the drive device 300 drives the traction rope 200, the traction rope 200 can drive the curtain body to move synchronously, realizing the automatic opening or closing of the curtain body. When the electric curtain 10 is in manual mode, when the user pulls the traction rope 200 through the curtain body, the drive device 300 can release the traction rope 200, and the length of the traction rope 200 increases. At this time, the pre-tensioning mechanism 130 can wind the traction rope 200 to prevent the traction rope 200 from slack and sagging, reducing safety hazards, and realizing the manual opening or closing of the curtain body.

[0072] In this application, when the electric curtain 10 is manually opened, the drive device 300 can release the traction rope 200. At this time, the pre-tensioning mechanism 130 can drive the winding wheel 120 to wind the traction rope 200, preventing the traction rope 200 from sagging. When the electric curtain 10 is manually closed, the pulling force of the traction rope 200 on the winding wheel 120 can overcome the pre-tensioning force of the pre-tensioning mechanism 130, allowing the winding wheel 120 to rotate and release the traction rope 200. Of course, in other embodiments of this application, the electric curtain 10 can also have the winding wheel 120 winding the traction rope 200 when manually closed, and the winding wheel 120 releasing the traction rope 200 when manually opened.

[0073] See Figure 3 and Figure 5 In one embodiment, the pre-tightening mechanism 130 includes an elastic element 131 and a pre-tightening shaft 132. The elastic element 131 is movably disposed in the support mechanism 110, with one end fixed to the support mechanism 110 and the other end connected to the pre-tightening shaft 132. The pre-tightening shaft 132 is coaxially connected to the winding wheel 120 and rotates synchronously with the winding wheel 120 to apply a pre-tightening force to the winding wheel 120.

[0074] The preload shaft 132 is rotatably mounted in the support mechanism 110 and coaxially connected to the winding reel 120. Furthermore, an elastic element 131 is mounted in the support mechanism 110, with one end fixed to the support mechanism 110 and the other end connected to the preload shaft 132. When the preload shaft 132 rotates, it drives the winding reel 120 to rotate, causing the winding reel 120 to wind the traction rope 200.

[0075] When the electric curtain 10 is in electric mode, the pull rope 200 remains taut. The pulling force of the pull rope 200 limits the winding wheel 120 and the elastic element 131, keeping the elastic element 131 taut. When the electric curtain 10 is in manual mode, if the pull rope 200 is pulled, the drive device 300 releases the pull rope 200. Due to the tension of the elastic element 131, the elastic element 131 can be gradually retracted, driving the pre-tensioning shaft 132 to rotate. The pre-tensioning shaft 132 then drives the winding wheel 120 to rotate, allowing the winding wheel 120 to wind the pull rope 200. If the pull rope 200 is pulled, the winding wheel 120 releases the pull rope 200. The winding wheel 120 can overcome the pre-tensioning force of the elastic element 131, driving the pre-tensioning shaft 132 to rotate, causing the elastic element 131 to gradually stretch, eventually reaching a fully taut state.

[0076] Thus, the pre-tensioning device 100 of this application can keep the traction rope 200 taut when the electric curtain 10 is in electric mode, so that the drive device 300 can drive the traction rope 200 to automatically open or close the curtain body. When the electric curtain 10 is in manual mode, the pre-tensioning force of the elastic element 131 can cause the winding wheel 120 to wind or release the traction rope 200, preventing the traction rope 200 from falling, so as to meet the manual opening or closing of the electric curtain 10.

[0077] See Figure 3 and Figure 5 In one embodiment of this application, the elastic element 131 is a coil spring, the center end of which is connected to the preload shaft 132, and the outer end of which is fixed to the support mechanism 110. When the preload shaft 132 rotates, it can drive the coil spring to retract (wind) or stretch (tighten).

[0078] When the pretensioning mechanism 130 is tightened, the coil spring is in a stretched state. When the drive device 300 releases the traction rope 200, the traction rope 200 becomes longer. At this time, the pulling force of the traction rope 200 on the winding wheel 120 is less than the elastic force of the coil spring (i.e., the pretension force of the coil spring). The coil spring can drive the pretensioning shaft 132 to rotate, causing the pretensioning shaft 132 to gradually retract, that is, the elastic force of the coil spring gradually decreases. Furthermore, after the winding wheel 120 is completely wrapped around the traction rope 200, the coil spring is not completely retracted and still has some tension, that is, the coil spring is still in a taut state, so that the traction rope 200 is always kept taut. In this way, the traction rope 200 can be tightened and wound at the same time, preventing the traction rope 200 from sagging.

[0079] When the winding wheel 120 pulls the line outward, that is, when the winding wheel 120 releases the traction rope 200, the pulling force of the traction rope 200 on the winding wheel 120 is greater than the elastic force of the coil spring (that is, the preload of the coil spring). At this time, the traction rope 200 can pull the winding wheel 120 to rotate against the elastic force of the coil spring. In turn, the winding wheel 120 can drive the preload shaft 132 to rotate, so that the preload shaft 132 drives the coil spring to stretch. When the winding wheel 120 releases the traction rope 200, the coil spring is fully tightened and is stretched to the limit position or the preset position.

[0080] Of course, in another embodiment of this application, the elastic element 131 is a torsion spring, which is connected to the preload shaft 132, and one arm of which is fixed to the support mechanism 110. When the preload shaft 132 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 of the preload mechanism 130. It is worth noting that the working principle of the elastic element 131 as a torsion spring is essentially the same as that of a coil spring, and will not be described again here.

[0081] See Figure 3 , Figure 5 and Figure 6 In one embodiment, the preload shaft 132 includes a first connecting shaft 1321 and a second connecting shaft 1322, which are coaxially arranged. The first connecting shaft 1321 is connected to the elastic member 131, and the second connecting shaft 1322 is connected to the shaft hole 121 of the winding wheel 120. Figure 6 for Figure 3 A schematic diagram of the preload shaft 132 in the preload device 100 shown.

[0082] exist Figure 5 and Figure 6 In this configuration, the second connecting shaft 1322 is positioned above the first connecting shaft 1321, and the central axes of the first connecting shaft 1321 and the second connecting shaft 1322 are collinear. That is, the first connecting shaft 1321 and the second connecting shaft 1322 are coaxially connected. The first connecting shaft 1321 can be fixedly connected to one end of the elastic element 131, such as connecting the center end of the coil spring. The second connecting shaft 1322 can be installed in the shaft hole 121 of the winding wheel 120.

[0083] In this way, when the elastic element 131 drives the preload shaft 132 to rotate, the preload shaft 132 can drive the winding wheel 120 to rotate coaxially through the first connecting shaft 1321 and the second connecting shaft 1322. Similarly, when the winding wheel 120 rotates, the winding wheel 120 can drive the elastic element 131 to rotate synchronously through the second connecting shaft 1322 and the first connecting shaft 1321.

[0084] Optionally, the first connecting shaft 1321 and the second connecting shaft 1322 are an integral structure. That is, the first connecting shaft 1321 and the second connecting shaft 1322 can be integrally formed to ensure the structural strength of the connection between the first connecting shaft 1321 and the second connecting shaft 1322. Of course, in other embodiments of this application, the first connecting shaft 1321 and the second connecting shaft 1322 can also be separately provided and reliably connected by threaded parts or the like.

[0085] See Figure 3 , Figures 5 to 11 In one embodiment, the preload shaft 132 further includes a first mating portion 1323, which is disposed on the outer wall of the second connecting shaft 1322. The winding wheel 120 has a second mating portion 122, which is disposed in the shaft hole 121. The second connecting shaft 1322 is disposed in the shaft hole 121, and the first mating portion 1323 is correspondingly installed with the first mating portion 1323 so that the winding wheel 120 and the elastic member 131 move synchronously or remain stationary synchronously through the preload shaft 132. Figure 7 for Figure 3 A schematic diagram of the winding wheel 120 in the pre-tightening device 100 from one perspective. Figure 8 for Figure 7The diagram shown is a schematic representation of the winding reel 120 from another perspective. Figure 9 for Figure 7 The bottom view of the winding reel 120 shown is shown. Figure 10 for Figure 7 The side view of the winding reel 120 shown is shown. Figure 11 for Figure 10 The cross-sectional view of the winding reel 120 along the BB direction is shown.

[0086] The first mating part 1323 is disposed on the outer wall of the second connecting shaft 1322. The winding wheel 120 has a shaft hole 121 disposed along the axial direction and a second mating part 122 disposed on the inner wall of the shaft hole 121. When the preload shaft 132 is connected to the winding wheel 120 through the second connecting shaft 1322, the second connecting shaft 1322 can be installed into the shaft hole 121 of the winding wheel 120. Furthermore, the first mating part 1323 and the second mating part 122 are correspondingly installed so that the second connecting shaft 1322 and the winding wheel 120 are fixedly connected and can rotate synchronously or remain stationary synchronously.

[0087] When the elastic force of the elastic element 131 matches the pulling force of the traction rope 200, the elastic element 131 remains stationary. At this time, the preload shaft 132 and the winding wheel 120 remain stationary synchronously. When the elastic force of the elastic element 131 is greater than the pulling force of the traction rope 200, the preload shaft 132 drives the winding wheel 120 to rotate through the engagement of the first mating part 1323 of the second connecting shaft 1322 and the second mating part 122 of the inner wall of the shaft hole 121 of the winding wheel 120, so that the winding wheel 120 winds the traction rope 200. When the elastic force of the elastic element 131 is less than the pulling force of the traction rope 200, the winding wheel 120 drives the preload shaft 132 to rotate through the engagement of the second mating part 122 of the inner wall of its shaft hole 121 and the first mating part 1323 of the second connecting shaft 1322, so that the winding wheel 120 releases the traction rope 200.

[0088] In one embodiment, the first mating portion 1323 is one of a connecting protrusion, a connecting key, and a connecting recess, and the cross-sectional shape of the second mating portion 122 is adapted to the cross-sectional shape of the first mating portion 1323. For example, as shown... Figure 6 and Figure 8 As shown, the first mating part 1323 is a protrusion, and correspondingly, the second mating part 122 is a recess. The preload shaft 132 and the winding wheel 120 are fixedly connected through the mating of the protrusion and the recess. Of course, in other embodiments of this application, the first mating part 1323 may be a recess and the second mating part 122 may be a protrusion, or both the first mating part 1323 and the second mating part 122 may be recessed and connected by a connecting key.

[0089] See Figure 3 and Figure 5In one embodiment, the support mechanism 110 includes a support housing 111 and a support base 112. The support housing 111 covers the support base 112 and encloses a receiving space. A pre-tensioning mechanism 130 is disposed on the support base 112 and located in the receiving space. A winding wheel 120 is located in the receiving space and is disposed on the side of the pre-tensioning mechanism 130 opposite to the support base 112. One end of the traction rope 200 is fixed to the support housing 111, and the other end of the traction rope 200 passes through the support housing 111 and is wound and connected to the winding wheel 120.

[0090] The support base 112 serves as the base plate of the support mechanism 110, and the support housing 111 serves as the upper cover of the support mechanism 110. The support housing 111 covers the support base 112, and the support housing 111 and the support base 112 can enclose a receiving space. The winding wheel 120 and the pre-tensioning mechanism 130 are rotatably disposed in the receiving space to protect the winding wheel 120 and the pre-tensioning mechanism 130 and prevent interference from external components. The arrangement of the support base 112 and the support housing 111 facilitates the assembly of the winding wheel 120 and the pre-tensioning mechanism 130.

[0091] Furthermore, the winding wheel 120 is located above the pre-tensioning mechanism 130, which is positioned between the winding wheel 120 and the support base 112. The support base 112 secures the elastic element 131, allowing the pre-tensioning shaft 132 to retract or tighten the elastic element 131. Simultaneously, one end of the traction rope 200 can be fixed to the support housing 111, and the other end of the traction rope 200 can pass through the support housing 111 and be wound around the winding wheel 120.

[0092] See Figure 5 and Figure 12 In one embodiment, the support base 112 has a recessed fixing groove 1121 for accommodating the elastic element 131 of the pretensioning mechanism 130. Figure 12 for Figure 3 The diagram shows a support base 112 in the pretensioning device 100. A fixing groove 1121 is recessed on the surface of the support base 112 facing the support housing 111, and the elastic member 131 is at least partially received in the fixing groove 1121.

[0093] After the elastic element 131 is at least partially housed in the fixing groove 1121, the outer periphery of the elastic element 131 corresponds to the inner wall of the fixing groove 1121. The fixing groove 1121 can limit the elastic element 131 radially, preventing the elastic element 131 from moving radially, so that the elastic element 131 can be accurately limited in the fixing groove 1121, which is convenient for tensioning the traction rope 200.

[0094] Meanwhile, after the elastic element 131 is at least partially housed in the fixing groove 1121, the height of the elastic element 131 exposed above the support base 112 can be reduced, thereby reducing the space occupied by the elastic element 131 between the support base 112 and the support housing 111, so as to minimize the overall height of the support mechanism 110, reduce the overall size and weight of the pretensioning mechanism 130, and facilitate the miniaturization design of the pretensioning device 100.

[0095] See Figures 2 to 5 In one embodiment, the support mechanism 110 further includes a fixing member 113, which is disposed on the support housing 111. The fixing member 113 is used to connect a pulley to slidably fix the pretensioning device 100 to the guide rail 400 of the electric curtain 10. The fixing member 113 enables the installation of the pretensioning device 100 and the guide rail 400. It is understood that a pulley is generally provided on the guide rail 400, and the pulley can be connected to the fixing member 113 through a hook, thereby realizing the connection with the pretensioning device 100.

[0096] In this way, when the traction rope 200 drives the pre-tensioning device 100 to move, the pre-tensioning device 100 can drive the pulley to move along the guide rail 400 through the fixing member 113, so as to guide the movement of the pre-tensioning device 100, ensure the accurate movement trajectory of the pre-tensioning device 100, and thus realize the accurate opening or closing of the electric curtain 10. Optionally, the fixing member 113 can be a connecting rod, a fixing pin, or other structure that facilitates the connection of the pulley.

[0097] See Figure 12 In one embodiment, the pretensioning mechanism 130 further includes a positioning member 133, which is disposed in the support mechanism 110 and is used to fix the other end of the elastic member 131. The positioning member 133 is disposed in the support base 112 of the support mechanism 110 and extends axially along the pretensioning shaft 132. One end of the elastic member 131 is fixed to the pretensioning shaft 132, and the other end of the elastic member 131 is fixed to the positioning member 133. The positioning member 133 fixes the elastic member 131 to the support base 112, preventing the elastic member 131 from shifting its position when tightened, and ensuring that the traction rope 200 is always in a taut state.

[0098] See Figure 3 , Figure 5 , Figure 13 and Figure 14 In one embodiment, the pre-tensioning mechanism 130 further includes a partition plate 134, which is disposed in the support mechanism 110 and located above the elastic member 131. The partition plate 134 is used to separate the elastic member 131 from the winding wheel 120 and to support the winding wheel 120. Figure 13 for Figure 3 A schematic diagram of the partition plate 134 in the pre-tightening device 100 shown from one perspective. Figure 14 for Figure 13 A schematic diagram of the partition 134 shown from another perspective.

[0099] A partition plate 134 is disposed between the support base 112 and the support housing 111, dividing the accommodating space of the support mechanism 110 into an upper first space and a lower second space, which are independent of each other. The winding wheel 120 is rotatably mounted on the partition plate 134 and is located in the first space, while the elastic element 131 is disposed in the second space. The preload shaft 132 rotatably passes through the partition plate 134 to connect the elastic element 131 and the winding wheel 120.

[0100] In this way, the separator 134 can separate the winding wheel 120 from the elastic element 131, placing the winding wheel 120 and the elastic element 131 in their respective spaces, thus avoiding interference between the winding wheel 120 and the elastic element 131. At the same time, the separator 134 can also provide rotational support for the winding wheel 120, improving the reliability of the rotation of the winding wheel 120.

[0101] See Figure 5 and Figure 13 In one embodiment, the partition plate 134 has a recessed first mounting groove 1341 on the side facing the winding wheel 120, the first mounting groove 1341 being used to accommodate a portion of the winding wheel 120. The first mounting groove 1341 is recessed on the surface of the partition plate 134 facing the winding wheel 120, and the winding wheel 120 is partially received in the first mounting groove 1341.

[0102] After the first mounting groove 1341 accommodates the winding wheel 120, it can radially limit the winding wheel 120, preventing it from moving radially and ensuring that the winding wheel 120 is reliably confined in the first mounting groove 1341. At the same time, after the first mounting groove 1341 accommodates the winding wheel 120, it can also reduce the space occupied by the winding wheel 120 above the partition plate 134, thereby reducing the overall height of the support mechanism 110.

[0103] See Figure 5 , Figure 8 , Figure 9 , Figure 11 and Figure 13 The partition plate 134 also has a protrusion 1343 on the side facing the winding wheel 120. The winding wheel 120 has a fixing hole 123. The protrusion 1343 is coaxially arranged with the fixing hole 123. The protrusion 1343 can be installed in the fixing hole 123 to position the winding wheel 120.

[0104] The winding wheel 120 has a recessed fixing hole 123 at one end facing the separator plate 134, and the fixing hole 123 is coaxially arranged with the shaft hole 121 of the winding wheel 120. The separator plate 134 has a protrusion 1343 corresponding to the fixing hole 123 at one end facing the recessed wheel. When the winding wheel 120 is installed on the separator plate 134, the fixing hole 123 can be fitted onto the protrusion 1343. The installation of the winding wheel 120 is limited by the cooperation between the protrusion 1343 and the fixing hole 123, so that the shaft hole 121 of the winding wheel 120 can be accurately installed onto the preload shaft 132.

[0105] See Figure 5 and Figure 14 In one embodiment, the partition plate 134 has a recessed second mounting groove 1342 on the side facing the elastic member 131, the second mounting groove 1342 being used to accommodate a portion of the elastic member 131. The second mounting groove 1342 is recessed on the surface of the partition plate 134 facing the elastic member 131, and the elastic member 131 is partially received in the second mounting groove 1342.

[0106] After the second mounting groove 1342 accommodates the elastic member 131, the elastic member 131 can be radially limited by the second mounting groove 1342. Furthermore, in conjunction with the fixing groove 1121, the elastic member 131 can be positioned in the second space enclosed by the partition plate 134 and the support base 112. At the same time, after the second mounting groove 1342 accommodates the elastic member 131, it can also reduce the space occupied by the elastic member 131 below the partition plate 134, thereby reducing the overall height of the support mechanism 110.

[0107] The pre-tensioning device 100 of this application uses a support mechanism 110 to connect the traction rope 200 to a winding wheel 120, and a pre-tensioning mechanism 130 is provided in the support mechanism 110 to apply a pre-tensioning force to the winding wheel 120. When the electric curtain 10 is in electric mode, the pre-tensioning mechanism 130 can tension the traction rope 200 to prevent it from slack. When the electric curtain 10 is in manual mode, the pre-tensioning mechanism 130 can wind the traction rope 200 to prevent it from drooping when the electric curtain 10 is manually opened or closed, reducing safety hazards and facilitating user operation.

[0108] See Figure 1 This application also provides an electric curtain 10, including a drive unit 300, a pull rope 200, a guide rail 400, a curtain body, and a pre-tensioning device 100 as described in any of the above embodiments. The drive unit 300 is disposed on the guide rail 400, the pre-tensioning device 100 is slidably disposed on the guide rail 400 and connected to both ends of the pull rope 200, the pull rope 200 is movably disposed on the guide rail 400 and connected to the drive unit 300. The curtain body is fixed to the pre-tensioning device 100 and / or the pull rope 200.

[0109] The electric curtain 10 of this application, after adopting the aforementioned pre-tensioning device 100, can apply a pre-tensioning force to the traction rope 200 through the cooperation of the pre-tensioning device 100 and the drive device 300, thus tightening the traction rope 200. Furthermore, when the electric curtain 10 is in manual mode, the pre-tensioning mechanism 130 in the pre-tensioning device 100 winds the traction rope 200, preventing the traction rope 200 from sagging when the electric curtain 10 is manually opened or closed, reducing safety hazards and facilitating user operation.

[0110] In one embodiment of this application, the number of curtain bodies is one, that is, the electric curtain 10 has a single-opening structure. In this case, the curtain body is set on the traction rope 200 or the pre-tensioning device 100, and the traction rope 200 drives the curtain body to move, thereby opening or closing the electric curtain 10. In another embodiment of this application, the number of curtain bodies is two, and generally the traction rope 200 has a folded-back structure, such as... Figure 1 As shown, the curtain body is set on two opposite sides of the traction rope 200. When the traction rope 200 moves, the two sides of the traction rope 200 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 10.

[0111] Furthermore, the pre-tensioning device 100 of this application can be adapted to existing curtain structures, meaning that no modification to the existing curtain structure is required. The drive device 300 can be directly installed onto the guide rail 400 of the existing curtain structure, and the traction rope 200 can be connected to the pre-tensioning device 100, which in turn is connected to the guide rail 400. In this way, the existing curtain structure can be automatically opened or closed without dismantling it, reducing modification costs.

[0112] In one embodiment, when the electric curtain 10 is in electric mode, the drive device 300 drives the traction rope 200 to move, so that the traction rope 200 drives the curtain body to open or close. When the electric curtain 10 is in manual mode, the pretensioning force applied by the pretensioning mechanism 130 can drive the winding wheel 120 to rotate, so that the winding wheel 120 winds the traction rope 200.

[0113] When the electric curtain 10 is in electric mode, the pre-tensioning mechanism 130 tensions the traction rope 200. When the drive device 300 drives the traction rope 200, the traction rope 200 can drive the curtain body to move synchronously, realizing the automatic opening or closing of the curtain body. When the electric curtain 10 is in manual mode, when the user pulls the traction rope 200 through the curtain body, the drive device 300 can release the traction rope 200, and the length of the traction rope 200 increases. At this time, the pre-tensioning mechanism 130 can wind the traction rope 200 to prevent the traction rope 200 from slack and sagging, reducing safety hazards, and realizing the manual opening or closing of the curtain body.

[0114] In this application, when the electric curtain 10 is manually opened, the drive device 300 can release the traction rope 200. At this time, the pre-tensioning mechanism 130 can drive the winding wheel 120 to wind the traction rope 200, preventing the traction rope 200 from drooping. When the electric curtain 10 is manually closed, the pulling force of the traction rope 200 on the winding wheel 120 can overcome the pre-tensioning force of the pre-tensioning mechanism 130, allowing the winding wheel 120 to rotate and release the traction rope 200.

[0115] 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.

[0116] 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 pre-tightening device, characterized in that, The pre-tensioning device is used to connect the two ends of the traction rope in the electric curtain, and the pre-tensioning device includes: A support mechanism is connected to one end of the traction rope; A winding reel, rotatably mounted in the support mechanism, and wound around the other end of the traction rope; and A pre-tensioning mechanism is disposed in the support mechanism and connected to the winding wheel. The pre-tensioning mechanism can apply a pre-tensioning force to the winding wheel, and the pre-tensioning force applied by the pre-tensioning mechanism can cause the winding wheel to rotate so that the winding wheel winds the traction rope.

2. The pre-tightening device according to claim 1, characterized in that, The pre-tightening mechanism includes an elastic element and a pre-tightening shaft. The elastic element is movably disposed in the support mechanism. One end of the elastic element is fixed to the support mechanism, and the other end is connected to the pre-tightening shaft. The preload shaft is coaxially connected to the winding wheel and rotates synchronously with the winding wheel to apply a preload force to the winding wheel.

3. The pre-tightening device according to claim 2, characterized in that, The pre-tightening shaft includes a first connecting shaft and a second connecting shaft, which are coaxially arranged. The first connecting shaft is connected to the elastic element, and the second connecting shaft is connected to the shaft hole of the winding wheel.

4. The pre-tightening device according to claim 3, characterized in that, The preload shaft further includes a first mating part, which is disposed on the outer wall of the second connecting shaft; the winding wheel has a second mating part, which is disposed in the shaft hole. The second connecting shaft is disposed in the shaft hole, and the first mating part is installed correspondingly to the first mating part, so that the winding wheel and the elastic element move synchronously or remain stationary synchronously through the pre-tightening shaft; The first mating part and the second mating part are mating structures with protrusions and recesses; or, the first mating part and the second mating part are both recessed and connected by a connecting key.

5. The pre-tightening device according to any one of claims 2 to 4, characterized in that, The pre-tightening mechanism further includes a positioning element, which is disposed in the support mechanism and is used to fix the other end of the elastic element; And / or, the elastic element is a coil spring, the center end of which is connected to the preload shaft and the outer end of which is fixed to the support mechanism; or, the elastic element is a torsion spring, which is connected to the preload shaft and one arm of which is fixed to the support mechanism.

6. The pre-tightening device according to any one of claims 2 to 4, characterized in that, The pre-tightening mechanism further includes a partition plate, which is disposed in the support mechanism and located above the elastic element; The partition plate is used to separate the elastic element from the winding wheel and to support the winding wheel.

7. The pre-tightening device according to claim 6, characterized in that, The partition plate has a recessed first mounting groove on the side facing the winding wheel, the first mounting groove being used to accommodate a portion of the winding wheel; And / or, the partition plate has a recessed second mounting groove on the side facing the elastic member, the second mounting groove being used to accommodate a portion of the elastic member; And / or, the partition plate has a protrusion on the side facing the winding wheel, the winding wheel has a fixing hole, the protrusion is coaxially arranged with the fixing hole, and the protrusion can be installed in the fixing hole to position the winding wheel.

8. The pre-tightening device according to any one of claims 1 to 4, characterized in that, The support mechanism includes a support housing and a support base, wherein the support housing covers the support base and encloses a receiving space; The pre-tightening mechanism is disposed on the support base and located in the receiving space, and the winding wheel is located in the receiving space and disposed on the side of the pre-tightening mechanism away from the support base; One end of the traction rope is fixed to the support housing, and the other end of the traction rope passes through the support housing and is wound around and connected to the winding reel.

9. The pre-tightening device according to claim 8, characterized in that, The support base has a recessed fixing groove for accommodating a portion of the elastic element of the pre-tightening mechanism; And / or, the support mechanism further includes a fixing member disposed on the support housing, the fixing member being used to connect a pulley to slidably fix the pretensioning device to the guide rail of the electric curtain.

10. An electric curtain, characterized in that, Includes a drive unit, a traction rope, a guide rail, a curtain body, and a pretensioning device as described in any one of claims 1 to 9; The driving device is disposed on the guide rail, the pretensioning device is slidably disposed on the guide rail and connected to both ends of the traction rope, and the traction rope is movably disposed on the guide rail and connected to the driving device; The curtain body is fixed to the pretensioning device and / or the traction rope.

11. The electric curtain according to claim 10, characterized in that, When the electric curtain is in electric mode, the drive device drives the traction rope to move, so that the traction rope drives the curtain body to open or close. When the electric curtain is in manual mode, the pretensioning force applied by the pretensioning mechanism can drive the winding wheel to rotate, causing the winding wheel to wind the traction rope.

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