Curtain opening and closing device and electric curtain

Abstract

The application relates to a curtain opening and closing device and an electric curtain. The curtain opening and closing device comprises a wheel set, a driving assembly and a traction line. The wheel set is arranged on one side of the curtain, and the driving assembly is arranged on the other side of the curtain. The driving assembly comprises a support, a driving wheel and a driven wheel which are rotatably arranged on the support. The driven wheel is arranged on one side of the driving wheel along the radial direction of the driving wheel, and the driving wheel and the driven wheel are arranged at intervals. The traction line is arranged around the outer circumferential surface of the wheel set and the outer circumferential surface of the driving wheel. Part of the traction line is clamped between the outer circumferential surface of the driving wheel and the outer circumferential surface of the driven wheel. The traction line is arranged to be movable under the driving of the driving wheel to drive the curtain to open and close.

Description

Technical Field

[0001] This utility model relates to the field of curtain technology, and in particular to a curtain opening and closing device and an electric curtain. Background Technology

[0002] With the popularization of smart homes, motorized curtains have become widely used due to their convenience. Currently, motorized curtains on the market mainly use gear transmission and track roller drive methods. Gear transmission uses a motor to drive gears that move a toothed belt, while track roller drive relies on a motor to drive rollers to roll on a track to open and close the curtains. Although these methods achieve electric control, they still have many technical problems in practical applications: the drive components of track roller motorized curtains not only need to move on the track but also require periodic charging, affecting ease of use; gear transmission requires the use of a special toothed track, resulting in high track costs, complex installation, and inapplicability to retrofitting existing curtain systems; while track roller drive does not require a special track, it relies on the friction between the rollers and the track, which is prone to wear and tear over time, affecting transmission efficiency, and it cannot be adapted to special track structures such as steel wire ropes.

[0003] To address the aforementioned issues, this technical solution aims to provide a novel curtain opening and closing device that significantly improves the product's versatility and user experience while maintaining the functions of traditional electric curtains.

[0004] The information disclosed above in the background art of this application is only used to understand the background of the concept of this application, and may contain information that does not constitute prior art. Utility Model Content

[0005] Therefore, it is necessary to provide a curtain opening and closing device and an electric curtain to address the above problems.

[0006] A curtain opening and closing device, comprising:

[0007] Wheel assembly, the wheel assembly being installed on one side of the curtain;

[0008] A drive assembly, configured to be mounted on the other side of the curtain, includes a bracket, a drive wheel and a driven wheel rotatably mounted on the bracket, the driven wheel being radially disposed on one side of the drive wheel, and the drive wheel and the driven wheel being spaced apart; and

[0009] A traction line is wound around the outer circumference of the wheel assembly and the drive wheel, and a portion of the traction line is clamped between the outer circumference of the drive wheel and the outer circumference of the driven wheel. The traction line is used to fix the curtain, and the traction line is configured to move under the drive of the drive wheel to drive the curtain to open and close.

[0010] The above-mentioned curtain opening and closing mechanism can achieve at least the following beneficial effects:

[0011] This curtain opening and closing mechanism places the wheel assembly on one side of the curtain and the drive assembly on the other side. Both the wheel assembly and drive assembly can be mounted on a wall or other mounting surface. In the drive assembly, the driving and driven wheels, supported by a bracket, are arranged alternately. The traction line is wound around the outer circumference of the wheel assembly and the driving wheel, and partially clamped between the outer circumferences of the driving and driven wheels. When the driving wheel rotates, the clamping friction between the driving and driven wheels drives the traction line to move, thus opening and closing the curtain. This structure, through the specific arrangement of the driving and driven wheels, provides a stable clamping effect on the traction line, ensuring that the traction line does not slip or deviate during transmission. In particular, this curtain opening and closing device directly drives the curtain via a traction line, eliminating the need to modify the existing curtain track structure. It is compatible with various existing curtain track types, such as U-shaped tracks, Roman rods, and steel cables, offering wide applicability and installation flexibility. It is suitable for both new curtain installations and easy additions to existing curtain systems. Furthermore, since the drive component is fixed to one side of the curtain and does not need to move with it, it can achieve continuous power supply without repeated charging. This solves the problem of repeated charging required by traditional electric curtain drive components that move on the track, significantly improving the product's versatility and user experience.

[0012] In some embodiments, the drive assembly further includes a baffle plate disposed on the bracket, the baffle plate being located on the side of the drive wheel facing the wheel assembly, and a limiting hole being formed on the baffle plate, through which the traction cable passes. The wall of the limiting hole can restrict the axial movement of the traction cable on the drive wheel. By setting a baffle plate on the bracket of the drive assembly on the side of the drive wheel facing the wheel assembly, and forming a limiting hole on the baffle plate for the traction cable to pass through, the axial movement of the traction cable on the drive wheel is restricted by the wall of the limiting hole, effectively preventing axial deviation or disengagement of the traction cable during transmission. This ensures that the traction cable always remains within the clamping area between the drive wheel and the driven wheel, thereby ensuring stable contact area and clamping friction between the traction cable and the drive and driven wheels, improving transmission efficiency and reliability, and avoiding increased wear or transmission failure caused by traction cable deviation, further enhancing the working stability of the entire curtain opening and closing device.

[0013] In some embodiments, a limiting groove is formed on the driving wheel, extending circumferentially to form an annular shape. The traction cable is embedded in the limiting groove, with at least a portion protruding from the outer circumferential surface of the driving wheel to abut against the driven wheel. The groove wall restricts the axial movement of the traction cable on the driving wheel. By forming an annular limiting groove extending circumferentially on the driving wheel and embedding the traction cable within it, with a portion protruding from the outer circumferential surface of the driving wheel to abut against the driven wheel, the groove wall constrains the axial movement of the traction cable on the driving wheel, effectively preventing axial movement or disengagement of the traction cable during transmission and ensuring a stable contact between the traction cable and the driving wheel. Simultaneously, the reliable abutment between the protruding portion of the traction cable and the driven wheel maintains the clamping effect of the driving and driven wheels on the traction cable, ensuring effective transmission of power and avoiding transmission failure or accelerated wear caused by axial displacement of the traction cable, significantly improving the stability and reliability of the transmission system.

[0014] In some embodiments, the outer circumferential surface of the drive wheel is provided with an anti-slip coating. By providing an anti-slip coating on the outer circumferential surface of the drive wheel, the coefficient of friction between the drive wheel and the traction line is effectively increased, ensuring that the traction line maintains a stable contact state with the drive wheel during transmission and preventing slippage. At the same time, the anti-slip coating can reduce the relative sliding wear of the traction line during transmission, which not only improves transmission efficiency but also extends the service life of the traction line, further enhancing the operational reliability and durability of the entire curtain opening and closing device.

[0015] In some embodiments, the outer circumferential surface of the drive wheel is engraved with anti-slip texture. By providing anti-slip texture on the outer circumferential surface of the drive wheel, the coefficient of friction between the drive wheel and the traction line is effectively increased, ensuring that the traction line maintains a stable contact state with the drive wheel during transmission, preventing slippage, and further enhancing the operational reliability and durability of the entire curtain opening and closing device.

[0016] In some embodiments, the bracket is provided with a support plate, and the drive assembly further includes an adjusting rod retractably passing through the support plate. The drive assembly also includes a rotating shaft and a fixed frame. The fixed frame is located at the end of the adjusting rod near the driving wheel, and both ends of the rotating shaft are rotatably connected to the fixed frame. The rotating shaft passes through the driven wheel along its axial direction. The adjusting rod can adjust the clamping force of the driven wheel and the driving wheel on the traction line. By setting a fixed frame at the end of the adjusting rod near the driving wheel and rotatably connecting the rotating shaft to the fixed frame along its axial direction, the driven wheel can rotate stably on the fixed frame via the rotating shaft. By providing a support plate on the bracket and retractably passing an adjusting rod through the support plate, a stable and adjustable clamping force is formed between the driven wheel and the driving wheel on the traction line, maintaining the stability and reliability of the transmission system, simplifying the maintenance of the device, and improving the applicability and service life of the product.

[0017] In some embodiments, the drive assembly further includes an adjusting screw that passes through and is threadedly connected to the support plate. The adjusting screw is hollow inside, and the adjusting rod passes through the adjusting screw. The drive assembly also includes an elastic structure, which is a compression spring sleeved on the adjusting rod. One end of the compression spring elastically abuts against the fixing frame, and the other end of the compression spring elastically abuts against the end of the adjusting screw. The adjusting screw can adjust the degree of compression of the compression spring to adjust the spring force. The fixing frame can drive the driven wheel to tend to move closer to the driving wheel under the action of the spring force, so that the traction line is clamped between the driven wheel and the driving wheel. An adjusting screw is threaded through the support plate and connected to it. The screw is hollow inside, with an adjusting rod inserted within it, allowing for precise adjustment of its position via the threaded connection. The elastic structure consists of a compression spring fitted onto the adjusting rod, with its two ends elastically abutting against the fixed frame and the end of the adjusting screw, respectively. The axial displacement of the adjusting screw changes the degree of compression of the spring, thereby dynamically adjusting the spring force. Under the action of the spring force, the fixed frame drives the driven wheel to continuously tend towards the driving wheel, ensuring that the traction cable is always stably clamped between the driven and driving wheels. At the same time, the fine-tuning function of the adjusting screw enables precise control of the clamping force, ensuring that the static friction force experienced by the traction cable during the rotation of the driving wheel does not exceed the maximum static friction force, thus preventing slippage of the traction cable and preventing excessive compression damage to the traction cable.

[0018] In some embodiments, the drive assembly further includes a first bearing disposed within the driven wheel. The outer ring of the first bearing is fixed to the driven wheel, and the inner ring of the first bearing is fixedly sleeved on the outer circumferential surface of the rotating shaft. By providing a first bearing within the driven wheel, fixing the outer ring of the first bearing to the driven wheel, and fixing the inner ring of the first bearing to the outer circumferential surface of the rotating shaft, the driven wheel can achieve low-friction, high-precision rotational motion relative to the rotating shaft through the first bearing. This structural design effectively reduces the frictional resistance during the rotation of the driven wheel, improves transmission efficiency, and ensures the coaxiality between the driven wheel and the rotating shaft through the precise fit of the bearing, avoiding vibration or noise caused by eccentric rotation. In addition, the rigid support of the first bearing enhances the structural stability of the driven wheel when bearing the radial load of the traction line, extends the service life of the driven wheel, and ensures a uniform distribution of the clamping force of the driving wheel and the driven wheel on the traction line, further improving the reliability and durability of the entire transmission system.

[0019] In some embodiments, a limiting groove is provided on the bracket, and at least one end of the rotating shaft passes through the fixed frame and the limiting groove, and the rotating shaft can slide along the length direction of the limiting groove. By providing a limiting groove on the bracket and passing at least one end of the rotating shaft through the fixed frame and the limiting groove, the rotating shaft can slide along the length direction of the limiting groove, thereby providing stable linear guidance for the driven wheel. This structural design, through the constraint of the rotating shaft's movement trajectory by the limiting groove, ensures that the driven wheel always maintains parallel alignment with the driving wheel when it approaches or moves away from the driving wheel under the action of the adjusting rod, avoiding uneven clamping of the traction line or increased wear caused by skew during the adjustment process. At the same time, the length of the limiting groove limits the maximum adjustment range of the driven wheel, ensuring adjustment flexibility while preventing mechanical interference or structural damage caused by over-adjustment, further improving the adjustment accuracy and operational reliability of the transmission system.

[0020] In some embodiments, the two ends of the rotating shaft are respectively inserted into two limiting grooves. By inserting the two ends of the rotating shaft into the two limiting grooves, a double-point linear guide structure is formed, thereby limiting the movement range of the driven wheel. This symmetrical limiting groove design effectively eliminates the deflection or jamming phenomenon that may occur when the driven wheel is subjected to force on one side by simultaneously constraining the movement trajectory of the rotating shaft on both sides, ensuring that the driven wheel and the driving wheel always maintain precise axial alignment. At the same time, the double groove structure evenly distributes the radial load of the rotating shaft, reduces the risk of local wear, enhances the smoothness and stability of the adjustment process, and ensures that the traction line always obtains a uniformly distributed clamping force during the transmission process, further improving the adjustment accuracy, durability and anti-interference capability of the system.

[0021] In some embodiments, the drive assembly further includes an elastic structural member that provides elasticity to cause the driven wheel to tend towards the driving wheel, thereby clamping a portion of the traction cable between the outer circumferential surfaces of the driving wheel and the driven wheel. By adding the elastic structural member, which provides elasticity to ensure the driven wheel always tends towards the driving wheel, the traction cable is stably clamped between the outer circumferential surfaces of the driving and driven wheels. This elastic preload design provides a stable clamping force on the traction cable. Simultaneously, the buffering effect of the elastic structural member absorbs vibrations or impacts during transmission, reducing mechanical wear and improving the smoothness and reliability of system operation. Furthermore, this structure simplifies manual adjustment steps, enabling the curtain opening and closing device to have adaptive capabilities, ensuring transmission efficiency and service life.

[0022] In some embodiments, the drive assembly further includes a rotating shaft that passes through the driven wheel along its axial direction. A limiting groove is provided on the bracket, at least one end of the rotating shaft passes through the limiting groove, and the rotating shaft is slidable along the length of the limiting groove. The elastic structural member is a torsion spring, one end of which is connected to the rotating shaft, and the other end of which is connected to the bracket. The torsion spring provides elastic force to cause the driven wheel to tend to move closer to the driving wheel, thereby clamping a portion of the traction line between the outer circumferential surface of the driving wheel and the outer circumferential surface of the driven wheel. By inserting the rotating shaft along the axial direction of the driven wheel and simultaneously creating a limiting groove on the bracket to allow the rotating shaft to slide along the groove direction, a linearly adjustable installation of the driven wheel relative to the driving wheel is achieved. A torsion spring is used as an elastic structural component, with its two ends connected to the rotating shaft and the bracket respectively. The torsional restoring force of the torsion spring provides a continuous elastic preload force close to the driving wheel, ensuring that the traction line is always stably clamped between the outer circumferences of the driving wheel and the driven wheel. This design automatically compensates for the slack or wear of the traction line through the elastic deformation of the torsion spring, maintaining a constant clamping force and preventing slippage or detachment. At the same time, the sliding cooperation between the limiting groove and the rotating shaft ensures the accuracy of the motion trajectory during the adjustment process of the driven wheel. Combined with the flexible force application characteristics of the torsion spring, this not only improves the self-adaptive capability of the transmission system but also significantly enhances the reliability and durability of the curtain opening and closing device.

[0023] In some embodiments, the bracket is provided with a support plate, the drive assembly further includes an adjusting rod that is telescopically inserted through the support plate, the drive assembly further includes a fixed frame and a rotating shaft, the rotating shaft is inserted through the driven wheel along the axial direction of the driven wheel, the fixed frame is mounted on the end of the adjusting rod near the driving wheel, both ends of the rotating shaft are rotatably connected to the fixed frame, the elastic structural member is a compression spring sleeved on the adjusting rod, one end of the compression spring elastically abuts against the fixed frame, the other end of the compression spring elastically abuts against the support plate, the fixed frame can drive the driven wheel to tend to move closer to the driving wheel under the elastic force of the compression spring, so that the traction line is clamped between the driven wheel and the driving wheel.

[0024] In some embodiments, the two ends of the rotating shaft pass through the two limiting grooves respectively. The drive assembly also includes snap rings. A retaining groove is formed on the outer circumferential surface of either end of the rotating shaft passing through the limiting groove. The snap ring is engaged in the retaining groove to restrict the axial movement of the rotating shaft and the driven wheel connected to the rotating shaft. By forming retaining grooves on the outer circumferential surfaces of the two ends of the rotating shaft passing through the limiting groove, and installing two snap rings to engage in the two retaining grooves at both ends of the rotating shaft, an axial limiting structure is formed, effectively preventing the rotating shaft and the driven wheel connected to it from moving unintended in the axial direction. This snap ring fixing method uses the elastic snap principle to achieve quick assembly and reliable positioning. While ensuring that the rotating shaft can slide freely along the limiting groove, it precisely constrains its axial degree of freedom, avoiding axial displacement of the driven wheel due to vibration or external force, which could lead to failure of the traction line clamping. This structural design simplifies assembly complexity, reduces maintenance costs, and the elastic characteristics of the snap ring can absorb axial impact loads, reduce mechanical wear, and further improve the stability and service life of the transmission system.

[0025] In some embodiments, the size of the retaining ring is larger than the size of the limiting groove.

[0026] In some embodiments, the drive assembly further includes a washer, with at least one washer fitted at each end of the rotating shaft, the washer being located between the limiting groove and the retaining spring, and the size of the washer being larger than the size of the limiting groove.

[0027] In some embodiments, the drive assembly further includes a drive member disposed on the bracket, the drive member being connected to the drive wheel and capable of driving the drive wheel to rotate. By setting the drive member on the bracket and connecting it to the drive wheel, the drive member can directly drive the drive wheel to rotate, thereby driving the traction line to move; this design integrates the drive member and the drive wheel on the bracket to form a compact transmission unit, optimizing the overall structural layout and improving space utilization; the power output of the drive member is converted into linear motion of the traction line through the clamping action of the drive wheel and the driven wheel, realizing the opening and closing control of the curtain.

[0028] In some embodiments, the drive component includes a motor, the drive shaft of which passes through and is fixed to the drive wheel. The drive assembly also includes a second bearing, the outer ring of which is fixed to the bracket, and the inner ring of the second rotating shaft is fixedly sleeved on the drive shaft. By passing the motor's drive shaft through and fixing it to the drive wheel, a rigid connection between the motor and the drive wheel is achieved, ensuring efficient power transmission. Simultaneously, the use of a second bearing as a support structure, with its outer ring fixed to the bracket and its inner ring sleeved on the drive shaft, forms a stable rotational support system. This design reduces frictional resistance during drive shaft rotation through precise bearing fit, reducing motor load and extending motor lifespan. The direct fixing of the motor drive shaft improves transmission efficiency. The axial and radial constraint of the bearing effectively suppresses motor vibration and axial movement, ensuring smooth rotation of the drive wheel, thereby guaranteeing the accuracy of the traction line movement and the reliability of curtain opening and closing.

[0029] In some embodiments, the number of driven wheels is set to multiple, and each of the multiple driven wheels is arranged radially along the driving wheel on the side of the driving wheel facing away from the wheel assembly. By arranging multiple driven wheels radially along the side of the driving wheel facing away from the wheel assembly, a multi-wheel cooperative clamping structure is formed, which significantly improves the clamping force and transmission stability of the traction cable.

[0030] In some embodiments, the number of driven wheels is set to multiple, and the multiple driven wheels are arranged radially along the driving wheel on opposite sides of the driving wheel.

[0031] In some embodiments, the wheel assembly includes a support and a fixed pulley rotatably connected to the support. A groove is provided around the outer circumference of the fixed pulley, and the traction line is wound around the groove. The wheel assembly includes a support and a fixed pulley, wherein the fixed pulley is rotatably connected to the support, and the traction line is wound around the fixed pulley, forming a guiding and supporting structure. This design utilizes the rotational characteristics of the fixed pulley to effectively reduce the frictional resistance of the traction line during movement, ensuring smooth opening and closing of the curtains. The bracket can be installed on a wall or on an existing curtain track. The support provides a stable mounting base for the fixed pulley, ensuring its rotational accuracy and load-bearing capacity. The traction line changes direction after winding around the fixed pulley, optimizing the transmission path layout and adapting to the spatial requirements of different curtain systems. Simultaneously, the rotational connection of the fixed pulley reduces mechanical wear, extends service life, and reduces operating noise, improving the overall system's quietness and reliability.

[0032] In some embodiments, the curtain opening device further includes a clamping member disposed on the traction line, the clamping member being used to connect with the curtain. By setting the clamping member on the traction line, it can be quickly and securely connected to the curtain, realizing the linkage control between the curtain and the transmission system; the clamping member adopts a mechanical clamping or elastic locking structure, significantly improving assembly efficiency and maintenance convenience; the design of the clamping member balances clamping force and anti-slip performance, ensuring that the curtain will not loosen under frequent opening and stopping or in windy conditions, while avoiding damage to the traction line; its modular nature supports adaptation to curtains of different materials or weights, expanding the applicability of the device, and the opening and closing range of the curtain can be flexibly adjusted by adjusting the clamping position to meet the user's personalized needs for light-blocking effect.

[0033] In some embodiments, the traction line is any one of steel rope, cotton rope, or plastic rope.

[0034] In some embodiments, the cross-sectional profile of the traction line is any one of a circle, an ellipse, a rectangle, or a trapezoid.

[0035] This application also provides an electric curtain, which includes a curtain and the curtain opening and closing device described in any of the above embodiments.

[0036] The aforementioned electric curtain includes the curtain opening and closing device described in any of the above embodiments. Therefore, the electric curtain also has at least the following beneficial effects: The curtain opening and closing device of this electric curtain arranges the wheel set on one side of the curtain and the drive assembly on the other side. In the drive assembly, the driving wheel and driven wheel, supported by a bracket, are arranged at intervals. The driven wheel is radially positioned along the driving wheel on the side facing away from the wheel set. The traction line is wound around the outer circumference of the wheel set and the driving wheel and partially clamped between the outer circumferences of the driving wheel and the driven wheel. When the driving wheel rotates, the clamping friction between the driving wheel and the driven wheel drives the traction line to move, and the traction line drives the curtain to open and close. This structure, through the specific arrangement of the driving wheel and the driven wheel, forms a stable clamp on the traction line, ensuring that the traction line does not slip or deviate during transmission. In particular, this curtain opening and closing device directly drives the curtain via a traction line, eliminating the need to modify the existing curtain track structure. It is compatible with various existing curtain track types, such as U-shaped tracks, Roman rods, and steel cables, offering wide applicability and installation flexibility. It is suitable for both new curtain installations and easy additions to existing curtain systems. Furthermore, since the drive component is fixed to one side of the curtain and does not need to move with it, it can achieve continuous power supply without repeated charging. This solves the problem of repeated charging required by traditional electric curtain drive components that move on the track, significantly improving the product's versatility and user experience. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of a curtain opening and closing device provided in one embodiment of the present invention.

[0039] Figure 2 This is a three-dimensional sectional view of a curtain opening and closing device provided in one embodiment of the present utility model.

[0040] Figure 3 This is another structural schematic diagram of a curtain opening and closing device provided in one embodiment of the present utility model.

[0041] Figure 4 This is another structural schematic diagram of a curtain opening and closing device provided in one embodiment of the present utility model.

[0042] Figure 5 This is a cross-sectional schematic diagram of a curtain opening and closing device provided in one embodiment of the present invention.

[0043] Figure 6 A schematic diagram of a drive wheel, traction line, and driven wheel provided in one embodiment of this utility model.

[0044] Figure 7 This is another structural schematic diagram of the driving wheel, traction line, and driven wheel provided in one embodiment of the present utility model.

[0045] Figure label:

[0046] 10. Curtain opening and closing device; 100. Wheel set; 110. Support; 120. Fixed pulley; 200. Drive assembly; 210. Bracket; 211. Support plate; 212. Limiting groove; 220. Drive wheel; 230. Driven wheel; 240. Balustrade; 241. Limiting hole; 250. Adjusting rod; 251. Adjusting screw; 260. Fixing bracket; 270. Rotating shaft; 271. Slot; 280. Elastic structural component; 291. First bearing; 292. Second bearing; 293. Drive component; 294. Drive shaft; 295. Snap ring; 296. Washer; 300. Traction line; 400. Clamping component. Detailed Implementation

[0047] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model 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 utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0048] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5In some embodiments, this application provides a curtain opening and closing device 10, which includes a wheel set 100, a drive assembly 200, and a traction line 300. The wheel set 100 is disposed on one side of the curtain, and the drive assembly 200 is disposed on the other side of the curtain. The drive assembly 200 includes a bracket 210, a drive wheel 220 and a driven wheel 230 rotatably mounted on the bracket 210. The driven wheel 230 is located radially from the drive wheel 220 on the side of the drive wheel 220 facing away from the wheel set 100. The drive wheel 220 and the driven wheel 230 are spaced apart. The traction line 300 is wound around the outer circumferential surface of the wheel set 100 and the drive wheel 220, and a portion of the traction line 300 is clamped between the outer circumferential surface of the drive wheel 220 and the outer circumferential surface of the driven wheel 230. The traction line 300 is used to fix the curtain and is configured to move under the drive of the drive wheel 220 to drive the curtain to open and close.

[0049] The above-mentioned curtain opening and closing device 10 can achieve at least the following beneficial effects:

[0050] The curtain opening and closing device 10 arranges a wheel set 100 on one side of the curtain and a drive assembly 200 on the other side. Both the wheel set 100 and the drive assembly 200 can be mounted on a wall or similar surface. In the drive assembly 200, the drive wheel 220 and driven wheel 230, supported by a bracket 210, are arranged at intervals. A traction line 300 is wound around the outer circumference of the wheel set 100 and the drive wheel 220, and partially clamped between them. When the drive wheel 220 rotates, the clamping friction between the drive wheel 220 and the driven wheel 230 drives the traction line 300 to move, thus opening and closing the curtain. This structure, through the specific arrangement of the drive wheel 220 and the driven wheel 230, provides a stable clamping effect on the traction line 300, ensuring that the traction line 300 does not slip or deviate during transmission. In particular, the curtain opening and closing device 10 directly drives the curtain via the traction line 300, without requiring modification to the original curtain track structure. It is compatible with various existing curtain track types such as U-shaped tracks, Roman rods, and steel wire ropes, offering wide applicability and installation flexibility. It is suitable for both new curtain installations and easy addition to existing curtain systems. Furthermore, since the drive component 200 is fixed to one side of the curtain and does not need to move with it, it can achieve continuous power supply without repeated charging. This solves the problem of repeated charging required by traditional electric curtain drive components 200 that move on the track, significantly improving the product's versatility and user experience.

[0051] like Figure 1As shown, in some embodiments, the drive assembly 200 further includes a baffle 240 disposed on the bracket 210. The baffle 240 is located on the side of the drive wheel 220 facing the wheel set 100. A limiting hole 241 is provided on the baffle 240. The traction line 300 passes through the limiting hole 241. The wall of the limiting hole 241 can limit the traction line 300 to move axially on the drive wheel 220. By setting a baffle 240 on the bracket 210 of the drive assembly 200 on the side of the drive wheel 220 facing the wheel set 100, and opening a limiting hole 241 on the baffle 240 for the traction line 300 to pass through, the movement of the traction line 300 in the axial direction of the drive wheel 220 is restricted by the wall of the limiting hole 241. This effectively prevents the traction line 300 from axially shifting or coming off during transmission, ensuring that the traction line 300 is always kept within the clamping area between the drive wheel 220 and the driven wheel 230. This ensures that the contact area and clamping friction between the traction line 300 and the drive wheel 220 and the driven wheel 230 are stable, improving transmission efficiency and reliability. At the same time, it avoids the problem of increased wear or transmission failure caused by the deviation of the traction line 300, further enhancing the working stability of the entire curtain opening and closing device 10.

[0052] In some embodiments, a limiting groove is formed on the driving wheel 220, the limiting groove extends circumferentially along the driving wheel 220 to form a ring, the traction line 300 is embedded in the limiting groove and at least a portion of the traction line 300 protrudes from the outer circumferential surface of the driving wheel 220 to abut against the driven wheel 230, and the groove wall of the limiting groove can restrict the movement of the traction line 300 in the axial direction of the driving wheel 220. By creating a circumferentially extending annular limiting groove on the driving wheel 220, and embedding the traction cable 300 within the limiting groove with a portion protruding from the outer circumferential surface of the driving wheel 220 to abut against the driven wheel 230, the groove wall constrains the axial movement of the traction cable 300 on the driving wheel 220. This effectively prevents the traction cable 300 from axially shifting or coming off during transmission, ensuring that the traction cable 300 maintains a stable contact relationship with the driving wheel 220 at all times. Simultaneously, the reliable abutment between the protruding portion of the traction cable 300 and the driven wheel 230 maintains the clamping effect of the driving wheel 220 and the driven wheel 230 on the traction cable 300. This ensures the effective transmission of power and avoids transmission failure or accelerated wear caused by axial displacement of the traction cable 300, significantly improving the stability and reliability of the transmission system.

[0053] In some embodiments, the outer circumferential surface of the drive wheel 220 is provided with an anti-slip coating. By providing an anti-slip coating on the outer circumferential surface of the drive wheel 220, the coefficient of friction between the drive wheel 220 and the traction line 300 is effectively increased, ensuring that the traction line 300 maintains a stable contact state with the drive wheel 220 during transmission and preventing slippage. At the same time, the anti-slip coating can reduce the relative sliding wear of the traction line 300 during transmission, which not only improves the transmission efficiency but also extends the service life of the traction line 300, further enhancing the operational reliability and durability of the entire curtain opening and closing device 10.

[0054] In some embodiments, the outer circumferential surface of the drive wheel 220 is engraved with anti-slip texture. By providing anti-slip texture on the outer circumferential surface of the drive wheel 220, the coefficient of friction between the drive wheel 220 and the traction line 300 is effectively increased, ensuring that the traction line 300 maintains a stable contact state with the drive wheel 220 during transmission, preventing slippage, and further enhancing the operational reliability and durability of the entire curtain opening and closing device 10.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the bracket 210 is provided with a support plate 211, and the drive assembly 200 further includes an adjusting rod 250 retractably passing through the support plate 211. The drive assembly 200 also includes a rotating shaft 270 and a fixed frame 260. The fixed frame 260 is located at one end of the adjusting rod 250 near the driving wheel 220. The two ends of the rotating shaft 270 are rotatably connected to the fixed frame 260, and the rotating shaft 270 passes through the driven wheel 230 along its axial direction. By providing a fixed frame 260 at one end of the adjusting rod 250 near the driving wheel 220, and by rotatably connecting the two ends of the rotating shaft 270 to the fixed frame 260 along its axial direction, the driven wheel 230 can rotate stably on the fixed frame 260 via the rotating shaft 270. By setting a support plate 211 on the bracket 210 and extending an adjusting rod 250 through the support plate 211, the driven wheel 230 and the driving wheel 220 form a stable and adjustable clamping force on the traction line 300, maintaining the stability and reliability of the transmission system, while simplifying the maintenance operation of the device and improving the applicability and service life of the product.

[0056] By setting a support plate 211 on the bracket 210 and extending an adjusting rod 250 through the support plate 211, the driven wheel 230 can move closer to or further away from the driving wheel 220 as the adjusting rod 250 moves, thereby achieving flexible adjustment of the clamping distance between the driving wheel 220 and the driven wheel 230. This structure can not only adapt to traction lines 300 of different diameters or materials, ensuring that the driving wheel 220 and the driven wheel 230 form a stable and adjustable clamping force on the traction line 300, but also compensate for wear or loosening of the traction line 300 due to long-term use by adjusting the adjusting rod 250, maintaining the stability and reliability of the transmission system, while simplifying the maintenance operation of the device and improving the applicability and service life of the product.

[0057] like Figure 2 As shown, in some embodiments, the drive assembly 200 further includes a fixed frame 260 and a rotating shaft 270. The rotating shaft 270 passes through the driven wheel 230 along its axial direction. The fixed frame 260 is located at one end of the adjusting rod 250 near the driving wheel 220. Both ends of the rotating shaft 270 are rotatably connected to the fixed frame 260. By setting the fixed frame 260 at one end of the adjusting rod 250 near the driving wheel 220, and by passing the rotating shaft 270 through the driven wheel 230 along its axial direction and rotatably connecting both ends to the fixed frame 260, the driven wheel 230 can rotate stably on the fixed frame 260 via the rotating shaft 270.

[0058] like Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, the drive assembly 200 further includes an adjusting screw 251, which passes through the support plate 211 and is threadedly connected to the support plate 211. The adjusting screw 251 is hollow inside. The adjusting rod 250 passes through the adjusting screw 251. The drive assembly 200 also includes an elastic structure 280, which is a compression spring sleeved on the adjusting rod 250. One end of the compression spring elastically abuts against the fixing frame 260, and the other end of the compression spring elastically abuts against the end of the adjusting screw 251. The adjusting screw 251 can adjust the degree of compression of the compression spring to adjust the elastic force of the compression spring. Under the elastic force of the compression spring, the fixing frame 260 can drive the driven wheel 230 to tend to move closer to the driving wheel 220, so that the traction line 300 is clamped between the driven wheel 230 and the driving wheel 220. By setting an adjusting screw 251 that passes through the support plate 211 and is threadedly connected to the support plate 211, the adjusting screw 251 is hollow inside and the adjusting rod 250 passes through it, so that the adjusting screw 251 can be precisely adjusted in position through thread engagement; the elastic structural component 280 adopts a compression spring sleeved on the adjusting rod 250, with its two ends elastically abutting against the fixed frame 260 and the end of the adjusting screw 251 respectively. The axial displacement of the adjusting screw 251 changes the degree of compression of the compression spring, thereby dynamically adjusting the elastic force of the compression spring; under the action of the compression spring, the fixed frame 260 drives the driven wheel 230 to continuously tend to approach the driving wheel 220, ensuring that the traction line 300 is always stably clamped between the driven wheel 230 and the driving wheel 220. At the same time, the fine adjustment function of the adjusting screw 251 realizes precise control of the clamping force, ensuring that the static friction force on the traction line 300 during the rotation of the driving wheel 220 does not exceed the maximum static friction force, thus avoiding slippage of the traction line 300 and preventing excessive compression damage to the traction line 300.

[0059] like Figure 2As shown, in some embodiments, the drive assembly 200 further includes a first bearing 291, which is disposed inside the driven wheel 230. The outer ring of the first bearing 291 is fixed to the driven wheel 230, and the inner ring of the first bearing 291 is fixedly sleeved on the outer circumferential surface of the rotating shaft 270. By installing a first bearing 291 inside the driven wheel 230, and fixing the outer ring of the first bearing 291 to the driven wheel 230 and the inner ring to the outer circumferential surface of the rotating shaft 270, the driven wheel 230 can achieve low-friction, high-precision rotational motion relative to the rotating shaft 270 through the first bearing 291. This structural design effectively reduces the frictional resistance when the driven wheel 230 rotates, improves transmission efficiency, and ensures the coaxiality between the driven wheel 230 and the rotating shaft 270 through the precise fit of the bearing, avoiding vibration or noise caused by eccentric rotation. In addition, the rigid support of the first bearing 291 enhances the structural stability of the driven wheel 230 when bearing the radial load of the traction line 300, extends the service life of the driven wheel 230, and ensures that the clamping force of the driving wheel 220 and the driven wheel 230 on the traction line 300 is evenly distributed, further improving the reliability and durability of the entire transmission system.

[0060] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the bracket 210 has a limiting groove 212, at least one end of the rotating shaft 270 passes through the fixing frame 260 and the limiting groove 212, and the rotating shaft 270 can slide along the length direction of the limiting groove 212. By creating a limiting groove 212 on the bracket 210 and inserting at least one end of the rotating shaft 270 into the fixed frame 260 and the limiting groove 212, the rotating shaft 270 can slide along the length of the limiting groove 212, thereby providing stable linear guidance for the driven wheel 230. This structural design, through the constraint of the limiting groove 212 on the movement trajectory of the rotating shaft 270, ensures that the driven wheel 230 always remains parallel to the driving wheel 220 when it approaches or moves away from the driving wheel 220 under the action of the adjusting rod 250, avoiding uneven clamping or increased wear of the traction line 300 due to skewness during adjustment. At the same time, the length of the limiting groove 212 limits the maximum adjustment range of the driven wheel 230, ensuring adjustment flexibility while preventing mechanical interference or structural damage caused by over-adjustment, further improving the adjustment accuracy and operational reliability of the transmission system.

[0061] like Figure 2As shown, in some embodiments, the two ends of the rotating shaft 270 are respectively inserted into the two limiting grooves 212. By inserting the two ends of the rotating shaft 270 into the two limiting grooves 212, a double-point linear guide structure is formed, thereby limiting the movement range of the driven wheel 230. The symmetrical limiting groove 212 design effectively eliminates the deflection or jamming phenomenon that may occur when the driven wheel 230 is subjected to force on one side by simultaneously constraining the movement trajectory of the rotating shaft 270 on both sides, ensuring that the driven wheel 230 and the driving wheel 220 always maintain precise axial alignment. At the same time, the double groove structure evenly distributes the radial load of the rotating shaft 270, reduces the risk of local wear, enhances the smoothness and stability of the adjustment process, and ensures that the traction line 300 always obtains a uniformly distributed clamping force during the transmission process, further improving the adjustment accuracy, durability and anti-interference ability of the system.

[0062] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the drive assembly 200 further includes an elastic structure 280, which provides elasticity to cause the driven wheel 230 to tend towards the driving wheel 220, thereby clamping a portion of the traction line 300 between the outer circumferential surface of the driving wheel 220 and the outer circumferential surface of the driven wheel 230. By adding the elastic structure 280, which provides elasticity to cause the driven wheel 230 to always tend towards the driving wheel 220, the traction line 300 is stably clamped between the outer circumferential surfaces of the driving wheel 220 and the driven wheel 230. This elastic preload design allows the traction line 300 to be subjected to a stable clamping force. At the same time, the buffering effect of the elastic structure 280 can absorb vibrations or impacts during transmission, reduce mechanical wear, and improve the smoothness and reliability of system operation. In addition, this structure simplifies the manual adjustment steps, enabling the curtain opening and closing device 10 to have self-adaptive capabilities, ensuring transmission efficiency and service life.

[0063] like Figure 4 and Figure 5As shown, in some embodiments, the drive assembly 200 further includes a rotating shaft 270, which passes through the driven wheel 230 along its axial direction. A limiting groove 212 is provided on the bracket 210, and at least one end of the rotating shaft 270 passes through the limiting groove 212. The rotating shaft 270 is slidable along the length direction of the limiting groove 212. The elastic structural member 280 is a torsion spring, one end of which is connected to the rotating shaft 270, and the other end of which is connected to the bracket 210. The torsion spring provides elastic force to make the driven wheel 230 tend to move closer to the driving wheel 220, so as to clamp part of the traction line 300 between the outer peripheral surface of the driving wheel 220 and the outer peripheral surface of the driven wheel 230. By inserting the rotating shaft 270 along the axial direction of the driven wheel 230, and simultaneously creating a limiting groove 212 on the bracket 210 to allow the rotating shaft 270 to slide along the groove direction, a linearly adjustable installation of the driven wheel 230 relative to the driving wheel 220 is achieved. A torsion spring is used as an elastic structural component 280, with its two ends connected to the rotating shaft 270 and the bracket 210 respectively. The torsional restoring force of the torsion spring provides a continuous elastic preload force close to the driving wheel 220 for the driven wheel 230, ensuring the traction line 300 starts moving smoothly. Finally, it is stably clamped between the outer circumference of the driving wheel 220 and the driven wheel 230. This design automatically compensates for the slack or wear of the traction line 300 through the elastic deformation of the torsion spring, maintaining a constant clamping force and avoiding slippage or derailment. At the same time, the sliding cooperation between the limiting slide groove 212 and the rotating shaft 270 ensures the accuracy of the motion trajectory of the driven wheel 230 during the adjustment process. Combined with the flexible force application characteristics of the torsion spring, it not only improves the self-adaptive ability of the transmission system, but also significantly enhances the reliability and durability of the curtain opening and closing device 10.

[0064] In some embodiments, the bracket 210 is provided with a support plate 211, the drive assembly 200 further includes an adjusting rod 250 telescopically passing through the support plate 211, the drive assembly 200 further includes a fixing frame 260 and a rotating shaft 270, the rotating shaft 270 passing through the driven wheel 230 along the axial direction of the driven wheel 230, the fixing frame 260 being disposed at one end of the adjusting rod 250 near the driving wheel 220, the two ends of the rotating shaft 270 being rotatably connected to the fixing frame 260, the elastic structural member 280 being a compression spring sleeved on the adjusting rod 250, one end of the compression spring elastically abutting against the fixing frame 260, and the other end of the compression spring elastically abutting against the support plate 211, the fixing frame 260 being able to drive the driven wheel 230 to tend to move closer to the driving wheel 220 under the elastic force of the compression spring, so that the traction line 300 is clamped between the driven wheel 230 and the driving wheel 220.

[0065] like Figure 1As shown, in some embodiments, the two ends of the rotating shaft 270 are respectively passed through the two limiting slide grooves 212. The drive assembly 200 also includes a retaining ring 295. A retaining groove 271 is formed on the outer circumferential surface of the rotating shaft 270 passing through either end of the limiting slide groove 212. The retaining ring 295 is engaged in the retaining groove to restrict the axial movement of the rotating shaft 270 and the driven wheel 230 connected to the rotating shaft 270. By creating slots 271 on the outer circumference of the two ends of the rotating shaft 270 passing through the limiting slide groove 212, and installing two retaining springs 295 into the two slots 271 at both ends of the rotating shaft 270, an axial limiting structure is formed, effectively preventing the rotating shaft 270 and the driven wheel 230 connected to it from moving unexpectedly in the axial direction. The retaining springs 295 fixing method uses the elastic snap principle to achieve quick assembly and reliable positioning. While ensuring that the rotating shaft 270 can slide freely along the limiting slide groove 212, it precisely constrains its axial degree of freedom, avoiding axial displacement of the driven wheel 230 due to vibration or external force, which would cause the traction line 300 to fail to hold. This structural design simplifies the assembly complexity and reduces maintenance costs. At the same time, the elastic characteristics of the retaining springs 295 can absorb axial impact loads, reduce mechanical wear, and further improve the stability and service life of the transmission system.

[0066] In some embodiments, the size of the retaining ring 295 is larger than the size of the limiting groove 212.

[0067] In some embodiments, the drive assembly 200 further includes a washer 296, with at least one washer 296 fitted at each end of the rotating shaft 270. The washer is located between the limiting groove 212 and the retaining ring 295, and the size of the washer 296 is larger than the size of the limiting groove 212.

[0068] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the drive assembly 200 further includes a drive member 293 disposed on the bracket 210. The drive member 293 is connected to the drive wheel 220 and can drive the drive wheel 220 to rotate. By setting the drive member 293 on the bracket 210 and connecting it to the drive wheel 220, the drive member 293 can directly drive the drive wheel 220 to rotate, thereby driving the traction line 300 to move. This design integrates the drive member 293 and the drive wheel 220 on the bracket 210 to form a compact transmission unit, optimizes the overall structural layout, and improves space utilization. The power output of the drive member 293 is converted into the linear motion of the traction line 300 through the clamping action of the drive wheel 220 and the driven wheel 230, realizing the opening and closing control of the curtain.

[0069] like Figure 2 As shown, in some embodiments, the drive member 293 includes a motor, the drive shaft 294 of the motor passes through the drive wheel 220 and is fixed to the drive wheel 220, the drive assembly 200 also includes a second bearing 292, the outer ring of the second bearing 292 is fixed to the bracket 210, and the inner ring of the second rotating shaft 270 is fixedly sleeved on the drive shaft 294. By passing the motor drive shaft 294 through and fixing it to the drive wheel 220, a rigid connection between the motor and the drive wheel 220 is achieved, ensuring efficient power transmission. Simultaneously, a second bearing 292 is used as a support structure, with its outer ring fixed to the bracket 210 and its inner ring fitted onto the drive shaft 294, forming a stable rotational support system. This design reduces the frictional resistance of the drive shaft 294 during rotation through the precise fit of the bearings, reducing the motor load and extending the motor's service life. The direct fixing of the motor drive shaft 294 improves transmission efficiency. The axial and radial constraints of the bearings effectively suppress motor vibration and axial movement, ensuring smooth rotation of the drive wheel 220, thereby guaranteeing the accuracy of the traction line 300's movement and the reliability of the curtain's opening and closing.

[0070] like Figure 3 As shown, in some embodiments, the number of driven wheels 230 is set to multiple, and the multiple driven wheels 230 are all arranged radially along the driving wheel 220 on the side of the driving wheel 220 facing away from the wheel set 100. By arranging multiple driven wheels 230 radially along the side of the driving wheel 220 facing away from the wheel set 100, a multi-wheel cooperative clamping structure is formed, which significantly improves the clamping force and transmission stability of the traction cable 300.

[0071] In some embodiments, the number of driven wheels 230 is set to multiple, and the multiple driven wheels 230 are arranged on opposite sides of the driving wheel 220 along the radial direction of the driving wheel 220.

[0072] Understandable, such as Figure 7As shown, if there is only one driven wheel 230, from the top view of the cross-section of the driven wheel 230, the contact point between the driven wheel 230 and the traction line 300 can be considered as clamping point A. When the driving wheel 220 rotates counterclockwise, the traction line 300 can also rotate counterclockwise under the drive of the driving wheel 220. The part of the traction line 300 above clamping point A is pulled and tends to be close to the outer circumference of the driving wheel 220. Therefore, the traction line 300 between clamping point A and the upper contact point B is taut and close to the driving wheel 220, thereby enhancing the friction between the driving wheel 220 and the traction line 300, which can better drive the movement of the traction line 300. Conversely, when the driving wheel 220 reverses direction, that is, when the driving wheel 220 rotates clockwise, the portion of the traction line 300 below the clamping point A is stretched. This results in a looser traction line 300 between the clamping point A and the upper contact point B, reducing the friction between the driving wheel 220 and the traction line 300, which is detrimental to the movement of the traction line 300 driven by the driving wheel 220. Therefore, in some embodiments of this application, such as... Figure 6 As shown, multiple driven wheels 230 are arranged around the driving wheel 220, which can ensure that no matter which direction the driving wheel 220 rotates, a relatively large portion of the traction line 300 can be in close contact with the driving wheel 200, thereby ensuring effective traction of the traction line 300 by the driving wheel 220 and the driven wheels 230.

[0073] like Figure 1 As shown, in some embodiments, the wheel set 100 includes a support 110 and a fixed pulley 120 rotatably connected to the support 110. The outer circumferential surface of the fixed pulley 120 is provided with a groove, and the traction line 300 is wound in the groove. The pulley assembly 100 includes a support 110 and a fixed pulley 120, wherein the fixed pulley 120 is rotatably connected to the support 110, and the traction line 300 is wound around the fixed pulley 120 to form a guiding and supporting structure. This design utilizes the rotational characteristics of the fixed pulley 120 to effectively reduce the frictional resistance of the traction line 300 during movement, ensuring smooth opening and closing of the curtains. The bracket 210 can be installed on a wall or on an existing curtain track. The support 110 provides a stable installation base for the fixed pulley 120, ensuring its rotational accuracy and load-bearing capacity. The traction line 300 changes direction after winding around the fixed pulley 120, optimizing the transmission path layout and adapting to the spatial requirements of different curtain systems. At the same time, the rotational connection of the fixed pulley 120 reduces mechanical wear, extends service life, reduces operating noise, and improves the overall system's quietness and reliability.

[0074] like Figure 1As shown, in some embodiments, the curtain opening device further includes a clamping member 400 disposed on the traction line 300, which is used to connect with the curtain. By providing the clamping member 400 on the traction line 300, it can be quickly and firmly connected to the curtain, realizing the linkage control between the curtain and the transmission system; the clamping member 400 adopts a mechanical clamping or elastic locking structure, which greatly improves assembly efficiency and maintenance convenience; the design of the clamping member 400 takes into account both clamping force and anti-slip performance, ensuring that the curtain will not loosen in frequent opening and stopping or in windy conditions, while avoiding damage to the traction line 300; its modular characteristics support adaptation to curtains of different materials or weights, expanding the applicability of the device, and the opening and closing range of the curtain can be flexibly adjusted by adjusting the clamping position to meet the user's personalized needs for light blocking effect.

[0075] In some embodiments, the traction line 300 is any one of steel rope, cotton rope, or plastic rope.

[0076] In some embodiments, the cross-sectional profile of the traction line 300 is any one of a circle, an ellipse, a rectangle, or a trapezoid.

[0077] In addition, this application also provides an electric curtain, which includes a curtain (not shown) and a curtain opening and closing device 10 as described in any of the above embodiments.

[0078] The electric curtain described above includes the curtain opening and closing device 10 described in any of the above embodiments. Therefore, the electric curtain also has at least the following beneficial effects: the curtain opening and closing device 10 of the electric curtain sets 100 on one side of the curtain and the drive assembly 200 on the other side of the curtain. The drive assembly 200 has a bracket 210 supporting a drive wheel 220 and a driven wheel 230 arranged at intervals. The driven wheel 230 is radially arranged along the drive wheel 220 on the side facing away from the wheel set 100. The traction line 300 is wrapped around the outer circumference of the wheel set 100 and the drive wheel 220 and partially clamped between the outer circumference of the drive wheel 220 and the driven wheel 230. When the drive wheel 220 rotates, the clamping friction force formed by the drive wheel 220 and the driven wheel 230 on the traction line 300 drives the traction line 300 to move, and the traction line 300 drives the curtain to open and close. This structure uses a specific arrangement of the driving wheel 220 and the driven wheel 230 to stably clamp the traction line 300, ensuring that the traction line 300 does not slip or deviate during transmission. Specifically, this curtain opening and closing device 10 directly drives the curtain via the traction line 300, eliminating the need to modify the existing curtain track structure. It is compatible with various existing curtain track types such as U-shaped tracks, Roman rods, and steel ropes, offering wide applicability and installation flexibility. It is suitable for newly installed curtains and can be easily added to existing curtain systems. Furthermore, because the drive component 200 is fixed to one side of the curtain and does not need to move with it, it can achieve continuous power supply without repeated charging. This solves the problem of repeated charging required by traditional electric curtain drive components 200 that move on the track, significantly improving the product's versatility and user experience.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] In the description of this specification, references to terms such as "an embodiment," "another implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

Claims

1. A curtain opening and closing device, characterized in that, include: Wheel assembly, the wheel assembly being installed on one side of the curtain; A drive assembly is provided for installation on the other side of the curtain. The drive assembly includes a bracket, a drive wheel and a driven wheel rotatably mounted on the bracket, the driven wheel being disposed radially on one side of the drive wheel, and the drive wheel and the driven wheel being spaced apart. as well as A traction line is wound around the outer circumference of the wheel assembly and the drive wheel, and a portion of the traction line is clamped between the outer circumference of the drive wheel and the outer circumference of the driven wheel. The traction line is used to fix the curtain, and the traction line is configured to move under the drive of the drive wheel to drive the curtain to open and close.

2. The curtain opening and closing device according to claim 1, characterized in that, The drive assembly also includes a baffle plate disposed on the bracket. The baffle plate is located on the side of the drive wheel facing the wheel assembly. A limit hole is provided on the baffle plate. The traction line passes through the limit hole. The wall of the limit hole can restrict the movement of the traction line in the axial direction of the drive wheel. And / or, a limiting groove is provided on the driving wheel, the limiting groove extends in a ring shape along the circumference of the driving wheel, the traction line is embedded in the limiting groove and at least a portion of the traction line protrudes from the outer circumferential surface of the driving wheel to abut against the driven wheel, and the groove wall of the limiting groove can restrict the movement of the traction line in the axial direction of the driving wheel. And / or, the outer circumferential surface of the drive wheel is provided with an anti-slip coating; And / or, the outer circumferential surface of the drive wheel is engraved with anti-slip texture.

3. The curtain opening and closing device according to claim 1, characterized in that, The bracket is provided with a support plate, and the drive assembly further includes an adjusting rod that is telescopically inserted through the support plate. The drive assembly also includes a rotating shaft and a fixed frame. The fixed frame is located at one end of the adjusting rod near the drive wheel. The two ends of the rotating shaft are rotatably connected to the fixed frame. The rotating shaft passes through the driven wheel along the axial direction of the driven wheel. The adjusting rod can adjust the clamping force of the driven wheel and the drive wheel on the traction line.

4. The curtain opening and closing device according to claim 3, characterized in that, The drive assembly further includes an adjusting screw, which passes through the support plate and is threadedly connected to the support plate. The adjusting screw is hollow inside. The adjusting rod passes through the adjusting screw. The drive assembly also includes an elastic structure, which is a compression spring sleeved on the adjusting rod. One end of the compression spring elastically abuts against the fixed frame, and the other end of the compression spring elastically abuts against the end of the adjusting screw. The adjusting screw can adjust the degree of compression of the compression spring to adjust the elastic force of the compression spring. The fixed frame can drive the driven wheel to tend to move closer to the driving wheel under the elastic force of the compression spring, so that the traction line is clamped between the driven wheel and the driving wheel. And / or, the drive assembly further includes a first bearing, which is disposed inside the driven wheel, the outer ring of the first bearing is fixed to the driven wheel, and the inner ring of the first bearing is fixedly sleeved on the outer circumferential surface of the rotating shaft; And / or, the bracket is provided with a limiting groove, at least one end of the rotating shaft passes through the fixed frame and the limiting groove, and the rotating shaft can slide along the length direction of the limiting groove.

5. The curtain opening and closing device according to claim 1, characterized in that, The drive assembly also includes an elastic structure that provides elasticity to cause the driven wheel to tend to move closer to the driving wheel, thereby clamping a portion of the traction line between the outer circumferential surface of the driving wheel and the outer circumferential surface of the driven wheel.

6. The curtain opening and closing device according to claim 5, characterized in that, The drive assembly further includes a rotating shaft that passes through the driven wheel along its axial direction. A limiting groove is provided on the bracket. At least one end of the rotating shaft passes through the limiting groove and is capable of sliding along the length of the limiting groove. The elastic structural member is a torsion spring. One end of the torsion spring is connected to the rotating shaft, and the other end is connected to the bracket. The torsion spring provides elastic force to make the driven wheel tend to move closer to the driving wheel, so as to clamp part of the traction line between the outer circumferential surface of the driving wheel and the outer circumferential surface of the driven wheel. Alternatively, the bracket may have a support plate, and the drive assembly may further include an adjusting rod that is retractably inserted through the support plate. The drive assembly may also include a fixed frame and a rotating shaft. The rotating shaft is inserted through the driven wheel along its axial direction. The fixed frame is located at one end of the adjusting rod near the driving wheel. Both ends of the rotating shaft are rotatably connected to the fixed frame. The elastic structural member is a compression spring sleeved on the adjusting rod. One end of the compression spring elastically abuts against the fixed frame, and the other end of the compression spring elastically abuts against the support plate. The fixed frame can, under the elastic force of the compression spring, cause the driven wheel to tend to move closer to the driving wheel, so that the traction line is clamped between the driven wheel and the driving wheel.

7. The curtain opening and closing device according to claim 6, characterized in that, The two ends of the rotating shaft are respectively inserted into the two limiting slide grooves. The drive assembly also includes a retaining ring. A retaining groove is opened on the outer circumferential surface of either end of the rotating shaft that passes through the limiting slide groove. The retaining ring is engaged in the retaining groove to restrict the axial movement of the rotating shaft and the driven wheel connected to the rotating shaft.

8. The curtain opening and closing device according to any one of claims 1 to 7, characterized in that, The number of driven wheels is set to multiple, and the multiple driven wheels are all arranged radially along the driving wheel on the side of the driving wheel opposite to the wheel assembly; Alternatively, the number of driven wheels can be set to multiple, with each of the multiple driven wheels arranged radially along opposite sides of the driving wheel.

9. The curtain opening and closing device according to any one of claims 1 to 7, characterized in that, The drive assembly further includes a drive member disposed on the bracket, the drive member being connected to the drive wheel and capable of driving the drive wheel to rotate; And / or, the wheel set includes a support and a fixed pulley rotatably connected to the support, the outer circumferential surface of the fixed pulley is provided with a groove, and the traction line is wound in the groove; And / or, the curtain opening device further includes a clamping member disposed on the traction line, the clamping member being used to connect to the curtain; And / or, the traction line is any one of steel rope, cotton rope, or plastic rope; And / or, the cross-sectional profile of the traction line is any one of a circle, an ellipse, a rectangle, or a trapezoid.

10. An electric curtain, characterized in that, Includes curtains and curtain opening and closing devices as described in any one of claims 1 to 9.

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