An electric window blind

Abstract

This invention relates to an electric curtain, comprising a housing, a dual-output device mounted on the housing, a track device, and a rope winding device. The dual-output device includes a power mechanism, a first power end, a switching mechanism, and a second power end. The power mechanism is connected to the switching mechanism, and the power mechanism switches between the first and second power ends via the switching mechanism. The track device is driven by the first power end, and the rope winding device is driven by the second power end. The rope winding device is mounted on the track device. A single power mechanism can drive both the track device and the rope winding device separately, optimizing the power output structure. The rope winding device, mounted on the track device, can drive the track device to move up and down; the two are combined into one unit.

Description

Technical Field

[0001] This invention relates to the field of curtain technology, and more particularly to an electric curtain. Background Technology

[0002] Electric curtains consist of a power mechanism and a track system, with the power mechanism and track system connected by a transmission connection.

[0003] The power mechanism drives the curtains to open and close automatically via a track system. In some applications where motorized curtains are installed at higher positions, they are also equipped with a cord winder, which enables the entire motorized curtain to rise and fall for ease of installation and maintenance.

[0004] Because the power for the track mechanism and the power for the rope winding mechanism are output from two separate power units, there are complex technical issues with the motion control of electric curtains. Furthermore, the independent setup of multiple power units requires independent debugging and maintenance, and the repetitive design of motors and other structures increases production and maintenance costs, thus necessitating improvement. Summary of the Invention

[0005] To overcome the problems existing in related technologies, embodiments of the present invention provide an electric curtain to solve the technical problems of complex motion control and high cost of electric curtains.

[0006] According to a first aspect of the present invention, an electric curtain is provided, comprising a housing, a dual-output device mounted on the housing, a track device, and a rope winding device. The dual-output device includes a power mechanism, a first power end, a switching mechanism, and a second power end. The power mechanism is connected to the switching mechanism, and the power mechanism is switched to one of the first power end and the second power end via the switching mechanism. The track device is driven to the first power end, and the rope winding device is driven to the second power end. The rope winding device is mounted on the track device.

[0007] In one embodiment, the outer casing has a track cavity, the track device is inserted into the track cavity, and the first power end is inserted into the track cavity, with the insertion direction of the first power end being perpendicular to the insertion direction of the track device.

[0008] In one embodiment, the rope winding device is connected to the second power end via a transmission rod.

[0009] In one embodiment, the rope winding device includes at least two rope winding assemblies, with adjacent rope winding assemblies connected in series via a connecting rod.

[0010] In one embodiment, the dual-output device includes an inner shell, a power mechanism mounted on the inner shell, and a power output mechanism. The power output mechanism includes an input shaft with its central axis coincident, a first output component, and a second output component. The input shaft is driven to the power mechanism. The first output component and the second output component are both rotatably connected to the inner shell. The first power end is driven to the first output component, and the second power end is driven to the second output component. The input shaft passes through at least the first output component, and a switching component is drivenly connected to the input shaft. The power unit is used to drive the switching component to move along the axial direction of the input shaft, so that the switching component engages with the first output component or the second output component.

[0011] In one embodiment, the power unit includes a motor and a screw connected to the output end of the motor, and a movable member is slidably connected to the upper limit of the inner shell, the movable member being movably connected to the switching member.

[0012] In one embodiment, the second output member has a spline groove and an oblong hole at one end facing the input shaft. A connector is meshed and slidably connected in the spline groove. A positioning pin is fixedly connected to the connector. The positioning pin passes through the oblong hole. A compression spring is provided between the connector and the bottom wall of the spline groove.

[0013] In one embodiment, the second output member is connected to at least one stage of planetary reduction gear and a braking assembly, the braking assembly including an input member connected to the planetary gears of the final stage of the planetary reduction gear, and the rope winding device connected to the braking assembly.

[0014] In one embodiment, the power mechanism includes a transmission assembly connected to a motor. The transmission assembly includes a first planetary gear set and a second planetary gear set that are connected in a transmission manner. The first planetary gear set includes a first internal gear sleeve, and the second planetary gear set includes a second internal gear sleeve. The first internal gear sleeve and the second internal gear sleeve are detachably connected to form a transmission cavity. The transmission assembly is connected to the inner shell.

[0015] In one embodiment, the first inner toothed sleeve has an insertion rib protruding from its end and at least one limiting protrusion protruding radially from the insertion rib; the second inner toothed sleeve has an insertion groove recessed from its end and a limiting groove recessed from the inner wall of the insertion groove; the insertion rib and the insertion groove are inserted into each other.

[0016] In one embodiment, the output end of the transmission assembly is connected to a clutch mechanism.

[0017] The technical solution provided by the embodiments of the present invention can include the following beneficial effects: the track device and the rope winding device are respectively connected to the dual-output device, and the dual-output device realizes power switching output through a switching mechanism. A single power mechanism can drive the track device and the rope winding device separately, thus optimizing the power output structure. The rope winding device is installed on the track device and can drive the track device to move up and down. The two are combined into one unit, which can facilitate maintenance and debugging, and can also be easily connected to the dual-output device. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 This is a schematic diagram of the structure of an electric curtain according to one embodiment.

[0020] Figure 2 This is a schematic diagram of the exploded structure of an electric curtain according to one embodiment.

[0021] Figure 3 This is an exploded structural diagram of a dual-output device according to one embodiment.

[0022] Figure 4 This is a cross-sectional structural schematic diagram of a dual-output device according to one embodiment.

[0023] Figure 5 This is an exploded structural diagram of a brake assembly according to one embodiment.

[0024] Figure 6 This is a schematic diagram of the exploded structure of a power mechanism according to an embodiment.

[0025] In the figure, the outer casing is 10; the track cavity is 11; the first power end is 12; the second bevel gear is 121; the second power end is 13; the dual-output device is 20; the power mechanism is 21; the motor is 211; the first planetary gear set is 212; the first internal gear sleeve is 2121; the insertion rib is 2122; the first tooth groove is 2123; the limiting protrusion is 2124; the first planetary carrier is 2125; the first planetary gear is 2126; the second planetary gear set is 213; the second internal gear sleeve is 2131; the second planetary gear is 2132; the transmission component is 2133; the second planetary carrier is 2134; the switching mechanism is 22; the switching component is 221; and the annular groove is 2211. ; Moving part 222; Power unit 223; Motor 2231; Screw 2232; Inner housing 23; Input shaft 24; First output part 25; Second output part 26; Connecting part 261; Positioning pin 262; Compression spring 263; Brake assembly 27; Planetary reduction gear 271; Output part 272; Input part 273; Roller 274; Brake housing 275; Brake seat 276; Clutch mechanism 28; Iron part 281; Magnetic bead 282; Clutch output part 283; Clutch part 284; Track device 30; Rope winder device 40; Rope winder assembly 41; Transmission rod 42; Connecting rod 43. Detailed Implementation

[0026] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention 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. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] like Figures 1 to 4 As shown, the present invention provides an electric curtain, which includes a housing 10, a dual-output device 20 installed on the housing 10, a track device 30, and a rope winding device 40. The track device 30 is used to drive the curtain assembly to move, and the rope winding device 40 can drive the electric curtain to move up and down.

[0028] The dual-output device 20 includes a power mechanism 21, a first power end 12, a switching mechanism 22, and a second power end 13. The power mechanism 21 is connected to the switching mechanism 22, and the power mechanism 21 is switched to either the first power end 12 or the second power end 13 via the switching mechanism 22. The power mechanism 21 acts as a single power output, and the switching mechanism 22 controls the power switching, enabling the power mechanism 21 to drive the track device 30 or the rope winding device 40 to perform corresponding functions. The track device 30 and the rope winding device 40 are respectively connected to the dual-output device 20. The dual-output device 20 achieves power switching output through the switching mechanism 22, allowing the single power mechanism 21 to drive both the track device 30 and the rope winding device 40, thus optimizing the power output structure.

[0029] The track device 30 is detachably installed on the housing 10 and is connected to the first power end 12 via a transmission connection. The rope winder device 40 is installed on the track device 30 and is connected to the second power end 13 via a transmission connection. The rope winder device 40, installed on the track device 30, can drive the track device 30 to move up and down. The two are combined into one unit, which can facilitate maintenance and debugging, and can also be easily connected to the dual-output device 20.

[0030] The first power end 12 and the second power end 13 are distributed in different directions of the dual-output device 20. Preferably, the power output direction of the first power end 12 and the power output direction of the second power end 13 are perpendicular to each other.

[0031] In one embodiment, the outer casing 10 is provided with a track cavity 11, which has a groove structure. The track device 30 is inserted into the track cavity 11 to position the two components together, resulting in easy assembly and high precision. The dual-output device 20 is assembled to the outer casing 10, with the first power end 12 inserted into the track cavity 11 and connected to the track device 30 via a transmission connection. Preferably, the track device 30 is provided with a spline groove, and the first power end 12 is provided with a spline shaft, which is connected to the spline groove via a transmission connection.

[0032] The insertion direction of the first power end 12 is perpendicular to the insertion direction of the track device 30. The fitting gap between the insertion parts of the first power end 12 and the track device 30 is small. The first power end 12 can also help limit the installation position of the track device 30.

[0033] Preferably, the track device 30 and the track cavity 11 are inserted into place, and after the first power end 12 and the track device 30 are engaged in transmission, the fastener passes through the outer shell 10 and locks to the track device 30 to lock the track device 30 and the outer shell 10.

[0034] Optionally, the rope winder device 40 is directly assembled and connected to the second power end 13 to form a power transmission. For example, the rope winding shaft of the rope winder device 40 is directly connected to the second power end 13, forming a direct connection.

[0035] In one embodiment, the rope winder device 40 and the second power end 13 are connected by a transmission rod 42. The transmission rod 42 has at least one transmission surface. The rope winder device 40 is connected to the second power end 13 via the transmission rod 42, which allows for convenient adjustment of the installation position of the rope winder device 40.

[0036] Preferably, the insertion direction of the transmission rod 42 and the second power end 13 is parallel to the insertion direction of the track device 30 and the track cavity 11. When the track device 30 and the track cavity 11 are inserted into place, the transmission rod 42 and the second power end 13 simultaneously complete the insertion and transmission connection. It is worth mentioning that the rope winding device 40 and the track device 30 are detachably connected, and the transmission rod 42 can also be assembled to the second power end 13 after the track device 30 and the track cavity 11 are assembled.

[0037] The rope reel device 40 drives the pull rope to wind up and down via the rotation of the reel, thereby controlling the raising and lowering of the electric curtain. When the rope reel device 40 is equipped with two pull ropes, the electric curtain can be raised and lowered smoothly.

[0038] In one embodiment, the rope winding device 40 includes at least two rope winding assemblies 41, which are spaced apart along the length of the track device 30. Adjacent rope winding assemblies 41 are connected in series via connecting rods 43, thereby expanding the connection range. Furthermore, multiple rope winding assemblies 41 can be powered through the same second power end 13, greatly improving the consistency of movement. Multiple rope winding assemblies 41 also enhance the smoothness of the electric curtain's lifting and lowering motion.

[0039] The first winding assembly 41 is connected to the second power end 13 via a transmission rod 42, improving the ease of connection.

[0040] like Figures 3 to 4 As shown, in the above embodiment, the dual-output device 20 includes an inner shell 23, a power mechanism 21 installed on the inner shell 23, and a power output mechanism. The power output mechanism includes an input shaft 24 with its central axis coincident, a first output component 25, and a second output component 26. The input shaft 24 is drivenly connected to the power mechanism 21. The first output component 25 and the second output component 26 are both rotatably connected to the inner shell 23. The first power end 12 is drivenly connected to the first output component 25, and the second power end 13 is drivenly connected to the second output component 26.

[0041] The input shaft 24 passes through at least the first output member 25. A switching member 221 is drivenly connected to the input shaft 24. The power unit 223 is used to drive the switching member 221 to move along the axial direction of the input shaft 24 so that the switching member 221 engages with the first output member 25 or the second output member 26.

[0042] The dual-output device 20 can be installed as a whole onto the housing 10 and locked together with fasteners. The first output component 25 and the second output component 26 are both rotatably connected to the inner housing 23. The first output component 25 and the second output component 26 serve as two power output structures of the power switching output mechanism. The input shaft 24 is connected to the power mechanism 21, which serves as the single power source for the dual-output device 20. By switching the power, one of the first output component 25 and the second output component 26 can be output.

[0043] The input shaft 24 passes through at least the first output member 25. A switching member 221 is driven and connected to the input shaft 24. The power unit 223 drives the switching member 221 to move along the axial direction of the input shaft 24, so that the switching member 221 engages with the first output member 25 or the second output member 26. The switching member 221 moves under the drive control of the power unit 223. The input shaft 24, the first output member 25, and the second output member 26 are coaxially arranged. The switching member 221 can move along the axial direction of the input shaft 24 to perform power output position switching.

[0044] For example, when the switching element 221 moves to engage with the first output element 25, the input shaft 24, the switching element 221, and the first output element 25 form a power transmission path, and the second output element 26 is in a non-powered state. When the switching element 221 moves to engage with the second output element 26, the input shaft 24, the switching element 221, and the second output element 26 form a power transmission path, and the first output element 25 is in a non-powered state.

[0045] The power switching output mechanism uses a single input shaft 24 to input driving force. The power unit 223 drives the switching component 221 to move. By controlling the meshing transmission position of the switching component 221, the input shaft 24 drives the first output component 25 or the second output component 26 to switch the power output, thereby optimizing the power output path and reducing costs.

[0046] The switching element 221 slides on the input shaft 24 and moves between the first output element 25 and the second output element 26. The switching element 221 can engage with either the first output element 25 or the second output element 26, and the first output element 25 and the second output element 26 maintain a stable engagement position during the engagement process.

[0047] The power unit 223 drives the switching member 221 to slide, thereby adjusting the engagement position of the switching member 221. The power unit 223 includes a motor 2231 and a screw 2232 connected to the output end of the motor 2231. A movable member 222 is slidably connected to the upper limit of the inner shell 23. The inner shell 23 and the movable member 222 cooperate to prevent the movable member 222 from deflecting and to maintain the linear sliding of the movable member 222. Optionally, the inner shell 23 forms a switching cavity, and the two sides of the movable member 222 slide against the cavity wall, allowing the switching member 221 to move within the switching cavity.

[0048] Preferably, the movable part 222 is configured in an approximate "I" or "U" shape, with both sides of the movable part 222 slidingly attached to the switching cavity to increase the contact area between the movable part 222 and the switching cavity.

[0049] The moving part 222 is movably connected to the switching part 221, wherein the moving part 222 performs linear movement, and at least the meshing transmission part of the switching part 221 can rotate relative to the moving part 222.

[0050] In one embodiment, the switching member 221 has an annular groove 2211, and at least a portion of the moving member 222 is located within the annular groove 2211. The annular groove 2211 is a circular groove structure, which can be formed by a recess in the surface of the switching member 221; or, the annular groove 2211 is a space formed by two spaced-apart protruding ribs on the surface of the switching member 221. At least a portion of the moving member 222 is located within the annular groove 2211, and during the movement of the moving member 222, it abuts against the corresponding side wall of the annular groove 2211, thereby driving the switching member 221 to move.

[0051] Motor 2231 is mounted on inner housing 23, and screw 2232 is rotatably connected to inner housing 23 and connected to the output end of motor 2231. Screw 2232 and moving part 222 are helically connected. When motor 2231 drives screw 2232 to rotate, moving part 222 moves linearly back and forth along screw 2232. Preferably, the center line of screw 2232 is parallel to input shaft 24.

[0052] The movable component 222 is provided with a threaded hole, and the screw 2232 is screwed to the threaded hole. The switching component 221 and the movable component 222 are rotatably connected to drive the switching component 221 to move.

[0053] The switching transmission method of the switching element 221: One end of the switching element 221 is engaged with the first output element 25. The first output element 25 has a concave transmission groove on the side facing the switching element 221. The transmission groove can be a spline groove or a square hole groove. A spline shaft is formed by protruding from the end of the switching element 221 facing the first output element 25. The spline shaft and the transmission groove are inserted and engaged to enable the switching element 221 and the transmission groove to be engaged and transmitted, so that the power of the input shaft 24 can be transmitted to the first output element 25 through the switching element 221.

[0054] In one embodiment, the first output component 25 is a bevel gear, and the power output mechanism includes a first power end 12 that meshes with the first output component 25. The first power end 12 extends out of the inner shell 23 and into the track cavity 11. The first output component 25 is a bevel gear, and a second bevel gear 121 can also be rotatably mounted on the inner shell 23. The first output component 25 and the second bevel gear 121 are driven by bevel gear meshing, and the rotation center of the first output component 25 and the rotation center of the second bevel gear 121 intersect. The portion of the second bevel gear 121 extending into the track cavity 11 constitutes the first power end 12.

[0055] Preferably, the first output member 25 and the second bevel gear 121 have a small rotational gap during meshing. During the process of the switching member 221 being inserted into the first output member 25, the first output member 25 can be finely rotated to form an aligned connection.

[0056] The other end of the switching component 221 is engaged with the second output component 26. The switching component 221 has a spline hole on the side facing the second output component 26, and the spline hole communicates with the through hole. The spline hole is recessed from the end of the switching component 221 and is coaxial with the through hole. The second output component 26 and the spline hole are inserted and engaged for transmission.

[0057] In this embodiment, the switching component 221 and the second output component 26 are directly connected for transmission, which can form a direct drive.

[0058] In one embodiment, the second output member 26 has a spline groove at one end facing the input shaft 24. A connector 261 is engaged and slidably connected within the spline groove, and a compression spring 263 is provided between the connector 261 and the bottom wall of the spline groove. The connector 261 and the spline groove are slidably connected, and the compression spring 263 can provide the elastic preload required for the connector 261 to extend and return to its original position.

[0059] The connector 261 extends elastically under the force of the compression spring 263. When the spline of the connector 261 and the spline hole of the switching component 221 coincide, they are inserted into each other. When the spline of the connector 261 and the spline hole of the switching component 221 do not coincide, the connector 261 and the switching component 221 experience a slight impact. The connector 261 then overcomes the elastic force and compresses. The chamfered portion of the spline hole presses against the connector 261 and rotates until they are aligned. The connector 261 then inserts into the spline hole, maintaining smooth docking.

[0060] The connector 261 is slidably connected to the second output member 26, and the second output member 26 limits the sliding range of the connector 261. The second output member 26 has an oblong hole, and a positioning pin 262 is fixedly connected to the connector 261, passing through the oblong hole. The oblong hole intersects and communicates with the spline groove. The oblong hole is an elongated hole structure to limit the maximum compression and extension of the connector 261 to the spline groove and the maximum length extending out of the second output member 26.

[0061] The positioning pin 262 is inserted into the fixing connector 261 and confined in the waist-shaped hole, and can slide within a preset range without disengaging from the second output member 26.

[0062] like Figures 3 to 5 As shown, in one embodiment, at least one planetary reduction gear 271 and a brake assembly 27 are coaxially mounted on a brake housing 276. A second output component 26 is connected to at least one planetary reduction gear 271 for power input reduction adjustment. The brake assembly 27 includes an input component 273, which is connected to the planetary gears of the final planetary reduction gear 271. The brake housing 276 and the inner housing 23 are assembled and connected.

[0063] The input component 273 serves as the power input point for connecting the brake assembly 27. At the same time, the planetary gears are rotatably mounted on the input component 273, forming the output part of the final stage planetary reduction gear 271. That is, the input component 273 integrates the brake assembly 27 and the final stage planetary reduction gear 271, reducing the number of transmission connection points while enabling each part to function independently, greatly reducing the size of the device and simplifying the structure.

[0064] Preferably, the brake assembly 27 further includes an output member 272, which is used to connect to the actuator, thereby enabling the brake assembly 27 to brake the actuator. The output member 272 serves as the second power end 13 of the dual-output device 20 and can be connected to the actuator to achieve power output. Optionally, the output member 272 can also be connected to an adapter, which serves as the second power end 13.

[0065] In one embodiment, the planetary reduction gear 271 includes an internal toothed groove formed within a brake seat 276. The internal toothed groove and the brake seat 276 are integrally formed, and the planetary gears of the planetary reduction gear 271 are meshed with the internal toothed groove. The brake seat 276 forms part of the planetary reduction gear 271, and the planetary reduction gear 271 is assembled to the brake seat 276, reducing the number of components in the planetary reduction gear 271.

[0066] Furthermore, a positioning cavity communicating with the internal gear groove is formed within the brake seat 276. The internal gear groove and the positioning cavity are arranged side by side, and the positioning cavity is recessed from one end of the brake seat 276. The positioning cavity and the internal gear groove are located in the same communicating space within the brake seat 276. The brake assembly 27 is installed in the positioning cavity, and the brake assembly 27 and the planetary reduction gear 271 are easily assembled and connected.

[0067] The brake housing 275 separates the movable parts of the brake assembly 27 from the brake seat 276. Simultaneously, the planetary gears mesh with the internal gear teeth to form the brake assembly 27. The input member 273 extends into the brake housing 275, and a speed reduction section is formed between the brake housing 275 and the input member 273. The brake housing 275 is inserted into the positioning cavity and surrounds the input member 273, allowing the input member 273 to rotate relative to the brake housing 275.

[0068] The deceleration unit connects the input component 273 and the brake housing 275. The brake assembly 27 also includes an output component 272 and rollers 274. The input component 273 has a deceleration chamber with multiple slots on its wall and multiple protrusions on its inner side, with the slots and protrusions alternating. The outer peripheral wall of the output component 272 has alternating deceleration planes and moving grooves; preferably, three deceleration planes are provided, with a moving groove between every two adjacent deceleration planes.

[0069] The output component 272 is inserted into the reduction chamber, and the protrusion extends into the corresponding moving groove. The roller 274 is located in the space formed by the groove opening, the reduction plane, and the inner wall of the brake housing 275. The working principle of the brake assembly 27 can be found in CN222654968U, and will not be repeated here. The difference is that the input component 273, as part of the planetary reduction group 271, constitutes the power input part, and the output component 272 is used to connect the actuator. The planetary reduction group 271 can first reduce speed, and then brake the actuator through the brake assembly 27.

[0070] like Figure 3 , Figure 4 and Figure 6 As shown, in the above embodiment, the power mechanism 21 includes a transmission component connected to the motor 211, the motor 211 being a power source, and preferably, the motor 211 is a brushless motor.

[0071] The transmission assembly is used to adjust the output parameters of the motor 211, particularly the output torque and speed. The transmission assembly includes a first planetary gear set 212 and a second planetary gear set 213 that are connected in a transmission manner. The first planetary gear set 212 includes a first internal gear sleeve 2121, and the second planetary gear set 213 includes a second internal gear sleeve 2131. The first internal gear sleeve 2121 and the second internal gear sleeve 2131 are detachably connected to form a transmission cavity. The transmission assembly is installed in the inner housing 23 and connected to the input shaft 24.

[0072] The planetary gears of the first planetary gear set 212 are meshed with the first tooth groove 2123. Similarly, the second planetary gear set 213 includes a second internal tooth sleeve 2131, which is provided with a second tooth groove. The planetary gears of the second planetary gear set 213 are meshed with the second tooth groove.

[0073] The first planetary gear set 212 is connected to the motor 211, wherein the motor 211 is connected to the sun gear of the first planetary gear set 212, and the output part of the first planetary gear set 212 is connected to the sun gear of the second planetary gear set 213; or, the output part of the first planetary gear set 212 is configured with a toothed structure to form the sun gear of the second planetary gear set 213. The first planetary gear set 212 and the second planetary gear set 213 are a two-stage reduction transmission, which can reduce the speed and increase the torque.

[0074] The first inner gear sleeve 2121 and the second inner gear sleeve 2131 are detachably connected to form a housing portion, and the internal spaces of the first inner gear sleeve 2121 and the second inner gear sleeve 2131 form a transmission cavity. By disassembling and assembling the first inner gear sleeve 2121 and the second inner gear sleeve 2131, the first planetary gear set 212 and the second planetary gear set 213 can be disassembled and assembled.

[0075] In one embodiment, a positioning hole is formed on the first inner gear sleeve 2121, and a threaded hole corresponding to the positioning hole is formed on the motor 211. A fastener passes through the positioning hole and connects to the threaded hole, thereby connecting the first inner gear sleeve 2121 and the motor 211, shortening the length between the motor 211 and the transmission assembly, and improving structural compactness. After the first inner gear sleeve 2121 and the second inner gear sleeve 2131 are assembled, the connecting end of the fastener is located inside the transmission assembly.

[0076] In one embodiment, the first inner gear sleeve 2121 has a protruding insertion rib 2122 at its end, and the second inner gear sleeve 2131 has a recessed insertion groove at its end. The insertion rib 2122 and the insertion groove are engaged to assemble the first inner gear sleeve 2121 and the second inner gear sleeve 2131 into a single unit, forming a transmission cavity. When the insertion rib 2122 and the insertion groove are in place, the first planetary gear set 212 and the second planetary gear set 213 are connected in a transmission manner.

[0077] Preferably, the insertion part of the insertion rib 2122 and the insertion groove is provided with a complementary matching limiting rib 2124 and a limiting groove.

[0078] Specifically, the first inner toothed sleeve 2121 includes at least one limiting protrusion 2124 radially protruding from the self-inserting rib 2122, and the second inner toothed sleeve 2131 includes a limiting groove recessed into the inner wall of the self-inserting groove. The self-inserting rib 2122 and the self-inserting groove are inserted into each other, and the limiting protrusion 2124 is inserted into the limiting groove to form a complementary fit. This can limit circumferential rotation, improve the insertion positioning accuracy, and make the insertion direction controllable.

[0079] The transmission assembly is mounted on the inner housing 23. At least one of the first inner gear sleeve 2121 and the second inner gear sleeve 2131 is locked to the inner housing 23 by fasteners to form a fixed installation. Preferably, the inner housing 23 is provided with a mounting groove, and the second inner gear sleeve 2131 is mounted in the mounting groove.

[0080] The first inner gear sleeve 2121 has a locking hole, and the second inner gear sleeve 2131 has a clearance notch corresponding to the locking hole. A locking screw passes through the mounting hole on the inner housing 23, then through the clearance notch, and locks into the locking hole to secure the first inner gear sleeve 2121 and the inner housing 23. The first inner gear sleeve 2121 defines the position of the second inner gear sleeve 2131 within the mounting groove, thereby fixing the mounting position of the transmission assembly and the inner housing 23.

[0081] The clearance notch is a notch located at the end of the second inner toothed sleeve 2131 to reduce the difficulty of aligning the locking screw with the locking hole and improve assembly convenience.

[0082] In one embodiment, the first planetary gear set 212 and the first internal gear sleeve 2121 constitute a planetary reduction mechanism. Preferably, the first internal gear sleeve 2121 is provided with a first tooth groove, and the groove wall of the first tooth groove is configured as helical teeth. The first planetary gear set 212 includes a first planet carrier 2125, at least one first planetary gear 2126 mounted on the first planet carrier 2125, and a first gear. The first tooth groove adopts helical teeth, and correspondingly, the first planetary gear 2126 adopts a helical tooth structure to reduce noise and improve transmission efficiency.

[0083] In one embodiment, the second inner gear sleeve 2131 is provided with a second tooth groove, and the groove wall of the second tooth groove is configured as straight teeth. The second planetary gear set 213 includes a second planetary carrier 2134, at least one second planetary gear 2132 mounted on the second planetary carrier 2134, and a transmission member 2133, wherein the second planetary gear 2132 respectively meshes with the first gear and the second tooth groove.

[0084] Both the first gear and the second planetary gear 2132 adopt a spur gear structure, with the first gear forming the sun gear located in the central area formed by the three second planetary gears 2132.

[0085] In one embodiment, the output end of the transmission component is connected to a clutch mechanism 28, which controls the on / off control of the output power of the transmission component, thereby controlling the power of the actuator.

[0086] In an optional embodiment, the clutch mechanism 28 is disposed within the second inner gear sleeve 2131, and the clutch mechanism 28 is assembled and connected to the second inner gear sleeve 2131. A receiving cavity is formed within the second inner gear sleeve 2131, and the receiving cavity communicates with the transmission cavity; the clutch mechanism 28 is located within the receiving cavity.

[0087] Specifically, the transmission component 2133 of the second planetary gear set 213 passes through the receiving cavity and is connected to the clutch mechanism 28. The clutch mechanism 28 controls the engagement and disengagement of the power input to the transmission component 2133. The first planetary gear set 212 and the second planetary gear set 213 constitute a two-stage reduction mechanism and are connected to the clutch mechanism 28, which can shorten the overall size and provide stable torque output.

[0088] In another embodiment, the transmission assembly further includes a clutch housing, on which a clutch mechanism 28 is mounted, and the clutch housing is detachably connected to a second inner gear sleeve 2131. The clutch housing has a cavity structure for accommodating and mounting the clutch mechanism 28. The clutch mechanism 28 and the clutch housing constitute independent components and are detachably connected to the second inner gear sleeve 2131, with the clutch mechanisms 28 and 213 being drive-connected. Optionally, the clutch housing and the second inner gear sleeve 2131 are connected by fasteners.

[0089] In the above embodiment, the clutch mechanism 28 includes an iron part 281, a clutch part 284, a clutch output part 283, and two magnetic beads 282. The output end of the transmission assembly is fixedly connected to the clutch part 284. A clutch cavity is formed in the clutch output part 283, and the two magnetic beads 282 are located in the clutch cavity and are respectively located on both sides of the clutch part 284. The inner wall of the clutch cavity is provided with grooves that are adapted to the magnetic beads 282.

[0090] The clutch element 284 has an approximately elliptical structure, and a space is formed between the clutch element 284 and the cavity wall of the clutch chamber to accommodate the movement of the magnetic bead 282. After the clutch element 284 moves the magnetic bead 282 into the groove, the clutch output element 283 outputs power. When the magnetic bead 282 disengages from the groove, the power to the clutch output element 283 and the second planetary gear set 213 is disconnected.

[0091] The clutch output component 283 has a partial protrusion to form an output shaft with a shaft-like protrusion. The output shaft passes through the second inner gear sleeve 2131 to form the power output part of the transmission component.

[0092] Furthermore, a connecting hole is provided on the clutch output component 283, and the output end of the transmission component extends into the connecting hole. The clutch component 284 is fixed to the output end of the transmission component, and the output end of the transmission component is coaxially arranged with the clutch output component 283, which improves the tightness of the connection between the transmission component and the clutch mechanism 28, and improves the compactness in space.

[0093] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed in this invention.

Claims

1. An electric window blind, characterized in that The device includes a housing (10), a dual-output device (20) mounted on the housing (10), a track device (30), and a rope winder device (40). The dual-output device (20) includes a power mechanism (21), a first power end (12), a switching mechanism (22), and a second power end (13). The power mechanism (21) is connected to the switching mechanism (22). The power mechanism (21) is switched to one of the first power end (12) and the second power end (13) through the switching mechanism (22). The track device (30) is driven to the first power end (12). The rope winder device (40) is driven to the second power end (13). The rope winder device (40) is mounted on the track device (30).

2. The motorized window treatment of claim 1, wherein, The outer shell (10) is provided with a track cavity (11), the track device (30) is inserted into the track cavity (11), the first power end (12) is inserted into the track cavity (11), and the insertion direction of the first power end (12) is perpendicular to the insertion direction of the track device (30).

3. The motorized window treatment of claim 1, wherein, The rope winding device (40) and the second power end (13) are connected by a transmission rod (42).

4. The motorized window treatment of claim 3, wherein, The rope winding device (40) includes at least two rope winding assemblies (41), with two adjacent rope winding assemblies (41) connected in series via a connecting rod (43).

5. The motorized window treatment of any of claims 1-4, wherein, The dual-output device (20) includes an inner shell (23), a power mechanism (21) installed in the inner shell (23), and a power output mechanism. The power output mechanism includes an input shaft (24) with its central axis coincident, a first output component (25), and a second output component (26). The input shaft (24) is driven to the power mechanism (21). The first output component (25) and the second output component (26) are both rotatably connected to the inner shell (23). The first power end (12) is driven to the first output component (25), and the second power end (13) is driven to the second output component (26). The input shaft (24) passes through at least the first output member (25), and a switching member (221) is connected to the input shaft (24). The power unit (223) is used to drive the switching member (221) to move along the axial direction of the input shaft (24) so ​​that the switching member (221) engages with the first output member (25) or the second output member (26).

6. The motorized window treatment of claim 5, wherein, The power unit (223) includes a motor (2231) and a screw (2232) connected to the output end of the motor (2231). The inner shell (23) is slidably connected to a moving part (222), and the moving part (222) is movably connected to the switching part (221).

7. The motorized window treatment of claim 5, wherein: The second output component (26) has a spline groove and a waist-shaped hole at one end facing the input shaft (24). A connector (261) is meshed and slidably connected in the spline groove. A positioning pin (262) is fixedly connected to the connector (261). The positioning pin (262) passes through the waist-shaped hole. A compression spring (263) is provided between the connector (261) and the bottom wall of the spline groove.

8. The motorized window treatment of claim 5, wherein: The second output (26) is connected to at least one stage planetary reduction gear (271) and a brake assembly (27). The brake assembly (27) includes an input (273) which is connected to the planetary gear of the final stage planetary reduction gear (271). The rope winder device (40) is connected to the brake assembly (27).

9. The motorized window treatment of claim 5, wherein: The power mechanism (21) includes a transmission assembly connected to a motor (211). The transmission assembly includes a first planetary gear set (212) and a second planetary gear set (213) that are connected in transmission. The first planetary gear set (212) includes a first internal gear sleeve (2121), and the second planetary gear set (213) includes a second internal gear sleeve (2131). The first internal gear sleeve (2121) and the second internal gear sleeve (2131) are detachably connected to form a transmission cavity. The transmission assembly is connected to the inner shell (23).

10. The motorized window treatment of claim 9, wherein: The first inner toothed sleeve (2121) has an insertion rib (2122) protruding from its end and at least one limiting protrusion (2124) protruding radially from the insertion rib (2122). The second inner toothed sleeve (2131) has an insertion groove recessed from its end and a limiting groove recessed from the inner wall of the insertion groove. The insertion rib (2122) and the insertion groove are inserted into each other.

11. The motorized window treatment of claim 8, wherein: The output end of the transmission assembly is connected to a clutch mechanism (28).

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