Curtain driving device

Abstract

The utility model provides a curtain driving device, and relates to the technical field of projection equipment. According to the curtain driving mechanism, the curtain can be unfolded to any length, and the curtain can be kept in a flat unfolding state. The curtain driving device comprises a base body, a winding mechanism and a supporting and pulling mechanism, wherein the winding mechanism is arranged on the base body and can rotate relative to the base body; a supporting and pulling driving assembly of the supporting and pulling mechanism is arranged on the base body, and a fixing assembly of the supporting and pulling mechanism is connected with the end, away from the winding mechanism, of the curtain. The curtain driving device is used for winding or unfolding the curtain.

Description

Technical Field

[0001] This application relates to the technical field of projection devices, and particularly to a curtain driving device. Background Art

[0002] Projection devices are increasingly widely used. In some scenarios, the projection light formed by the projection device is projected onto a curtain to form a projection screen on the curtain. In the related art, although the automatic unfolding and storage of the curtain can be achieved, the unfolded curtain cannot always be kept flat. Utility Model Content

[0003] This application provides a curtain driving mechanism, which can unfold the curtain to any length and can keep the curtain in a flat unfolded state.

[0004] The curtain driving device provided by this application includes: a base body, a winding mechanism, and a stretching mechanism; wherein, the winding mechanism is arranged on the base body and can rotate relative to the base body to wind or unfold the curtain connected to the winding mechanism; the stretching driving component of the stretching mechanism is arranged on the base body, and the fixing component of the stretching mechanism is connected to one end of the curtain far away from the winding mechanism, and the fixing component moves up and down relative to the base body driven by the stretching driving component.

[0005] For the curtain driving device provided by this application, since a winding mechanism is rotatably arranged on the base body, one end of the curtain can be fixed on the winding mechanism, and the curtain can be driven to wind by the winding mechanism, so that the unfolding or winding and storage of the curtain can be realized, and the curtain can be unfolded to any length (within the maximum unfolding length of the curtain) by controlling the winding mechanism. At the same time, a stretching driving component is arranged on the base body, and a fixing component for fixedly connecting to one end of the curtain far away from the winding mechanism is arranged. The fixing component can be driven by the stretching driving component to rise or fall relative to the base body, so that a force can be applied to one end of the unfolded curtain far away from the winding mechanism through the fixing component, and thus the curtain can be kept in a flat unfolded state after unfolding. Therefore, the curtain driving mechanism provided by this application can unfold the curtain to any length and can keep the curtain in a flat unfolded state.

[0006] In a possible implementation manner of this application, the winding mechanism includes a winding driving component and a winding drum. The winding drum is rotatably arranged on the base body, the winding driving component is arranged on the base body and is in transmission connection with the winding drum, the winding driving component can drive the winding drum to rotate, and the winding drum is used for arranging the curtain.

[0007] In the technical solution of this application, since the winding mechanism includes a winding drum rotatably arranged on the base body, a curtain can be arranged through the winding drum, and a winding drive assembly is arranged on the winding drum, and the winding drum can be driven to rotate through the winding drive assembly, so that the winding of the curtain can be realized, or the curtain can be unfolded, and then the storage of the curtain can be realized or the curtain can be unfolded to any length.

[0008] In a possible implementation manner of this application, the winding mechanism further includes a damping assembly. The damping assembly is arranged on the base body and connected to the winding drum. The damping assembly is used to apply a resistance force to the winding drum to limit the rotation of the winding drum.

[0009] In the technical solution of this application, since a damping assembly is arranged on the winding drum, a damping torque can be applied to the winding drum through the damping assembly, so that the winding drum can also remain stationary when receiving a rotational torque applied through the curtain, and then the curtain can be stretched flat by the winding drum and the fixing assembly, and the unfolded curtain can be kept in a flat state.

[0010] In a possible implementation manner of this application, the damping assembly includes a first fixed seat, a damping shaft and damping members. The first fixed seat is fixedly connected to the base body. The damping shaft is fixedly connected to the winding drum and coaxially arranged with the winding drum. At least two damping members are stacked and sleeved on the damping shaft; wherein, along the circumferential direction of the winding drum, a part of the damping members is fixedly connected to the damping shaft, and another part of the damping members is fixedly connected to the first fixed seat.

[0011] In the technical solution of this application, since at least two damping members are sleeved on the damping shaft, and a part of the damping members is fixedly connected to the damping shaft, and another part of the damping members is fixedly connected to the first fixed seat, a damping torque can be generated by the friction force generated when the two parts of the damping members rotate relative to each other, and the magnitude of the damping torque can be adjusted by adjusting the pressing force applied to the damping members, so as to facilitate the control of the damping torque.

[0012] In a possible implementation manner of this application, the stretching drive assembly further includes a swinging assembly. One end of the swinging assembly is fixedly connected to the stretching drive assembly, and the other end of the swinging assembly is rotatably connected to the fixing assembly. Driven by the stretching drive assembly, the swinging assembly can swing relative to the base body to drive the fixing assembly to move away from or close to the base body.

[0013] In the technical solution of this application, since the stretching drive assembly and the fixing assembly are connected through the swinging assembly, and the swinging assembly is arranged to swing relative to the base body, the fixing assembly can be driven to move relative to the base body by the swinging of the swinging assembly relative to the base body, so that the fixing assembly can apply a force away from the base body to the curtain, so as to facilitate stretching the curtain flat.

[0014] In one possible implementation of the present application, the swing assembly includes a first swing member and a second swing member; the first fixed end of the first swing member is fixedly connected to the support and pull drive assembly, the first swing end of the first swing member is rotatably connected to the second swing end of the second swing member, and the third swing end of the second swing member is rotatably connected to the fixed assembly.

[0015] In the technical solution of the present application, since the swing assembly is configured as a first swing member and a second swing member that are rotatably connected, the relative motion of the two swing members (similar to the motion form of folding) can be controlled to drive the fixed assembly to rise and fall relative to the base. After the first swing member and the second swing member are brought close to each other, the first swing member and the second swing member can be accommodated inside the base, which is conducive to reducing the space occupied by the curtain driving device after being stored.

[0016] In one possible implementation of the present application, the supporting and pulling drive assembly includes a supporting and pulling drive member and a driven shaft; the driven shaft is rotatably arranged on the base, the first fixed end of the first swinging member is fixedly connected to the driven shaft, the supporting and pulling drive member is fixed on the base, and is transmission-connected to the driven shaft through the supporting and pulling transmission member.

[0017] In the technical solution of the present application, since the driven shaft is rotatably arranged on the base, and the first fixed end of the first swinging member is fixedly connected to the driven shaft, the first swinging member can be swung relative to the base through the driven shaft. The supporting and pulling driving member and the driven shaft are connected through the supporting and pulling transmission member, and the transmission ratio of the supporting and pulling driving member and the driven shaft can be controlled through the supporting and pulling transmission member, so as to control the rotation speed of the driven shaft.

[0018] In a possible implementation of the present application, the supporting and pulling transmission member includes a meshing worm and a worm wheel, the worm is rotatably disposed on a base and connected to the supporting and pulling driving member, and the worm wheel is fixedly connected to the driven shaft.

[0019] In the technical solution of the present application, since the supporting and pulling driving assembly and the driven shaft are connected through the worm gear and the worm gear, not only can the supporting and pulling driving assembly drive the driven shaft to rotate through the worm gear and the worm gear, but the self-locking function of the worm gear and the worm gear can also be used to keep the first swinging member and the second swinging member in the position after the movement, so that the fixed assembly can continue to apply a force away from the base, and the curtain can be kept in a flat state.

[0020] In a possible implementation of the present application, the supporting and pulling driving assembly further includes a detection member, which is disposed on the base at a position corresponding to the driven shaft and is used to detect a rotation angle of the driven shaft.

[0021] In the technical solution of the present application, since a detection member corresponding to the driven shaft is provided on the base body, the rotation angle of the driven shaft can be detected by the detection member, so that the movement position of the first swinging member driven by the driven shaft can be determined, which is beneficial to improving the accuracy of controlling the movement positions of the swinging assembly and the fixing assembly.

[0022] In a possible implementation manner of the present application, the detection member includes a magnetic induction member and a magnetic member. One of the magnetic induction member and the magnetic member is fixedly arranged on the base body, and the other of the magnetic induction member and the magnetic member is fixedly connected to the driven shaft and rotates with the driven shaft.

[0023] In the technical solution of the present application, since the detection member includes a magnetic member and a magnetic induction member, an electric signal can be generated by the change in the magnetic field of the magnetic induction member caused by the relative movement of the magnetic member and the magnetic induction member, so that the rotation angle of the driven shaft can be determined according to the electric signal. Description of the Drawings

[0024] Figure 1 Structural schematic diagram of the curtain driving device provided by the present application Figure 1 ;

[0025] Figure 2 Exploded structural schematic diagram of the curtain driving device provided by the present application;

[0026] Figure 3 Structural schematic diagram of the curtain driving device provided by the present application Figure 2 ;

[0027] Figure 4 Structural schematic diagram of the base body in the curtain driving device provided by the present application;

[0028] Figure 5 Structural schematic diagram of the fixing assembly in the curtain driving device provided by the present application;

[0029] Figure 6 Structural schematic diagram of the winding driving assembly in the curtain driving device provided by the present application;

[0030] Figure 7 Structural schematic diagram of the damping assembly in the curtain driving device provided by the present application;

[0031] Figure 8 Cross-sectional structural schematic diagram of the damping assembly in the curtain driving device provided by the present application;

[0032] Figure 9 Structural schematic diagram of the tensioning driving assembly in the curtain driving device provided by the present application.

[0033] Explanation of the reference numerals:

[0034] 1 - Substrate; 11 - Box body; 12 - Cover body; 13 - Connecting piece; 14 - Opening; 2 - Winding mechanism; 21 - Reel; 22 - Winding drive assembly; 221 - Winding drive part; 222 - Winding transmission part; 223 - Second fixing seat; 23 - Damping assembly; 231 - First fixing seat; 2311 - Fixing block; 2312 - Sleeve; 232 - Damping shaft; 233 - Damping part; 2331 - First damping piece; 2332 - Second damping piece; 234 - Nut; 235 - Gasket; 3 - Tensioning mechanism; 31 - Tensioning drive assembly; 311 - Tensioning drive part; 312 - Driven shaft; 313 - Tensioning transmission part; 3131 - Worm; 3132 - Worm gear; 314 - Reducer; 315 - Detection part; 316 - Third fixing seat; 32 - Fixing assembly; 321 - Sealing part; 322 - Card slot; 323 - Clamping part; 324 - Accommodating groove; 325 - Cushion block; 33 - Swing assembly; 331 - First swing piece; 332 - Second swing piece; 333 - Fixing piece; 334 - Hinge; 4 - Curtain. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will further describe the specific technical solutions of the present application in detail with reference to the accompanying drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0036] In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0037] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left" and "right" are defined relative to the orientation of the components shown in the drawings. It should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and they may change accordingly with the change of the orientation of the components placed in the drawings.

[0038] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium.

[0039] In the embodiments of the present application, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0040] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0041] The embodiments of the present application provide a curtain driving device. Referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , Figure 1 is a schematic structural diagram of the curtain driving device provided by the present application Figure 1 , Figure 2 is an exploded structural diagram of the curtain driving device provided by the present application, Figure 3 is a schematic structural diagram of the curtain driving device provided by the present application Figure 2 , Figure 4 is a schematic structural diagram of the base body in the curtain driving device provided by the present application, Figure 5 is a schematic structural diagram of the fixing component in the curtain driving device provided by the present application.

[0042] The curtain 4 driving device provided by the embodiments of the present application includes: a base body 1, a winding mechanism 2 and a stretching mechanism 3; wherein, the winding mechanism 2 is arranged on the base body 1 and can rotate relative to the base body 1 to wind or unwind the curtain 4 connected to the winding mechanism 2; the stretching driving component 31 of the stretching mechanism 3 is arranged on the base body 1, and the fixing component 32 of the stretching mechanism 3 is connected to one end of the curtain 4 away from the winding mechanism 2, and the fixing component 32 moves up and down relative to the base body 1 driven by the stretching driving component 31.

[0043] In the embodiments of the present application, the base body 1 is used to install and carry other components in the curtain 4 driving device, and the curtain 4 driving device can also be installed at the working position through the base body 1, such as fixing the curtain 4 driving device at working positions such as walls, roofs and vehicle roofs.

[0044] Exemplary, such as Figure 4As shown, the base body 1 can be set to a structure including a box body 11 and a cover body 12. After the box body 11 and the cover body 12 are buckled, they can enclose to form a receiving cavity. For example, the lengths of the box body 11 and the cover body 12 can be set according to the length of the winding mechanism 2, so that the length of the receiving cavity is greater than the length of the winding mechanism 2. Then, the winding mechanism 2 can be fixedly connected to the inner wall of the box body 11 so that the winding mechanism 2 is located in the receiving cavity. Alternatively, the stretching driving assembly 31 can be fixedly connected to the inner wall of the box body 11 so that the stretching driving assembly 31 is located in the receiving cavity.

[0045] In another example, an opening 14 can be provided on the cover body 12. The width and length of the opening 14 are the same as those of the fixing component 32, so that the curtain 4 can extend outside the base body 1 through the opening 14. A connecting member 13 can be provided between the base body 1 and the box body 11. For example, matching card slots and buckles can be provided on the connecting member 13 and the box body 11 respectively, so that the connecting member 13 can be detachably connected to the box body 11 through the card slots and buckles. The cover body 12 can be connected to the connecting member 13 by means of adhesion, threaded connection, snap connection, etc.

[0046] In the embodiment of the present application, one end of the curtain 4 can be fixed on the winding mechanism 2, and the winding mechanism 2 can be arranged in the receiving cavity of the base body 1, so that the other end of the curtain 4 extends outside the base body 1 from the opening 14 on the cover body 12. By controlling the rotation of the winding mechanism 2 relative to the base body 1, the winding mechanism 2 can drive the curtain 4 to move relative to the base body 1, so that the curtain 4 can be wound on the winding mechanism 2, or the curtain 4 wound on the winding mechanism 2 can be unfolded. For example, the curtain 4 can be fully unfolded, or the curtain 4 can be unfolded to half of its length, or the curtain 4 can be unfolded to any length.

[0047] In the embodiment of the present application, a stretching mechanism 3 can be provided in the curtain 4 driving device. After the curtain 4 is unfolded, a force can be applied to the curtain 4 through the stretching mechanism 3 to keep the unfolded curtain 4 in a flat state. As Figure 2 and Figure 3As shown, a stretching drive assembly 31 can be provided in the stretching mechanism 3, and the stretching drive assembly 31 can be fixed to the base body 1, such as being fixed in the accommodation cavity of the base body 1. A fixing assembly 32 can also be provided in the stretching mechanism 3. The length of the fixing assembly 32 matches the width of the curtain 4. The fixing assembly 32 can be fixedly connected to the end of the curtain 4 away from the base body 1, and the stretching drive assembly 31 can be connected to the fixing assembly 32, so that the stretching drive assembly 31 can drive the fixing assembly 32 to move up and down relative to the base body 1. For example, the stretching drive assembly 31 and the fixing assembly 32 can be connected through a swing assembly 33, so that the stretching drive assembly 31 drives the fixing assembly 32 to move in a plane parallel to the plane where the curtain 4 is located after being unfolded. After the curtain 4 is unfolded to the required length, a force away from the base body 1 can be applied to the curtain 4 through the fixing assembly 32, so that the curtain 4 can be kept in a flat state.

[0048] Exemplarily, such as Figure 5 As shown, the fixing assembly 32 can be set to include a plugging member 321 and a clamping member 323. Among them, the plugging member 321 matches the opening 14 on the cover body 12. After the winding and storage of the curtain 4 are completed, the fixing assembly 32 can be attached to the cover body 12, and the plugging member 321 can be covered and abutted against the edge of the opening 14 of the cover body 12, so that the accommodation cavity of the base body 1 can be formed into a closed space, which is beneficial to reducing the entry of dust and the like into the curtain 4 driving device. A card slot 322 can also be provided on the plugging member 321. The length of the card slot 322 is consistent with the width of the curtain 4. The end of the curtain 4 away from the base body 1 can be placed in the card slot 322, and a clamping member 323 matching the card slot 322 can be used to snap the clamping member 323 into the card slot 322, so as to clamp and fix the end of the curtain 4 away from the base body 1 in the card slot 322.

[0049] In the curtain driving device provided by the embodiment of the present application, since a winding mechanism 2 is rotatably provided on the base body 1, one end of the curtain 4 can be fixed to the winding mechanism 2, and the curtain 4 can be driven to wind by the winding mechanism 2, so that the unfolding or winding and storage of the curtain 4 can be realized, and the curtain 4 can be unfolded to any length (within the maximum unfolding length of the curtain 4) through the control of the winding mechanism 2. At the same time, a stretching drive assembly 31 is provided on the base body 1, and a fixing assembly 32 for fixedly connecting to the end of the curtain 4 away from the winding mechanism 2 is provided. The stretching drive assembly 31 can drive the fixing assembly 32 to rise or fall relative to the base body 1, so that a force can be applied to the end of the unfolded curtain 4 away from the winding mechanism 2 through the fixing assembly 32, and further the curtain 4 can be kept in a flat unfolded state after being unfolded. Therefore, the curtain driving mechanism provided by the embodiment of the present application can unfold the curtain 4 to any length and can keep the curtain 4 in a flat unfolded state.

[0050] In some possible embodiments of the present application, referring to Figure 6 , Figure 6 is a schematic structural diagram of a winding drive assembly in a curtain drive device provided by the present application. The winding mechanism 2 includes a winding drive assembly 22 and a winding drum 21. The winding drum 21 is rotatably arranged on the base body 1. The winding drive assembly 22 is arranged on the base body 1 and is in transmission connection with the winding drum 21. The winding drive assembly 22 can drive the winding drum 21 to rotate, and the winding drum 21 is used for arranging the curtain 4.

[0051] In the embodiments of the present application, a winding drive assembly 22 and a winding drum 21 can be arranged in the winding mechanism 2. The winding drum 21 can be set to a cylindrical shape, and the length of the winding drum 21 is consistent with the width of the curtain 4, or slightly longer than the width of the curtain 4. One end of the curtain 4 close to the base body 1 can be fixed on the winding drum 21 by means of bonding, clamping, etc.

[0052] Exemplarily, as Figure 6 shown, a second fixing seat 223 can be arranged in the winding mechanism 2. One end of the winding drum 21 can be rotatably arranged on the second fixing seat 223, and the winding drive assembly 22 can be fixedly arranged on the second fixing seat 223. Fasteners such as screws can be used to fix the second fixing seat 223 on the inner wall of the box body 11 of the base body 1, so as to arrange the winding drive assembly 22 on the base body 1 and rotatably arrange the winding drum 21 on the base body 1.

[0053] In another example, the winding drive assembly 22 can adopt a stepping motor, a servo motor or an ordinary motor, as well as fasteners such as screws for fixing the motor on the second fixing seat 223. The motor and the winding drum 21 can be in transmission connection through gears, etc. For example, the number of gears and the transmission ratio of the gears can be determined according to the respective rotation speeds of the motor and the winding drum 21. For example, the motor and the winding drum 21 can be in transmission connection through three sequentially meshing gears. It is also possible to use transmission parts such as chains and belts to connect the motor and the winding drum 21 in transmission.

[0054] In the above embodiments, since the winding mechanism 2 includes a winding drum 21 rotatably arranged on the base body 1, the curtain 4 can be arranged through the winding drum 21, and a winding drive assembly 22 is arranged on the winding drum 21. The winding drive assembly 22 can drive the winding drum 21 to rotate, so as to realize the winding of the curtain 4, or to unfold the curtain 4, and further realize the storage of the curtain 4 or to unfold the curtain 4 to any length.

[0055] In some possible embodiments of the present application, as Figure 2 and Figure 3 shown, the winding mechanism 2 further includes a damping assembly 23. The damping assembly 23 is arranged on the base body 1 and is connected to the winding drum 21. The damping assembly 23 is used to apply a resistance to the winding drum 21 to limit the rotation of the winding drum 21.

[0056] In the embodiment of the present application, during the process that the winding and pulling drive assembly 31 drives the winding drum 21 to rotate to wind or unfold the curtain 4, it is necessary to enable the winding drum 21 to stop at any position. A damping assembly 23 can be provided for the winding drum 21 to limit the free rotation of the winding drum 21 through the damping assembly 23.

[0057] Exemplarily, the damping assembly 23 can be provided at one end of the winding drum 21 far from the winding drive assembly 22. For example, the damping assembly 23 can be fixed on the base body 1, and the damping assembly 23 can be set as a rotatable structure. One end of the winding drum 21 far from the winding drive assembly 22 can be fixedly connected to the damping assembly 23, or the damping assembly 23 can also be abutted against the circumferential surface of the winding drum 21 to apply a frictional force to the winding drum 21. In this way, during the rotation of the winding drum 21 relative to the base body 1, a resistance can be applied to the winding drum 21 through the damping assembly 23. When setting the winding drive assembly 22 and the damping assembly 23, it is necessary to make the driving torque of the winding drive assembly 22 greater than the damping torque applied by the damping assembly 23 to the winding drum 21, so that the winding drive assembly 22 can drive the winding drum 21 to rotate. When the winding drive assembly 22 stops applying a driving torque to the winding drum 21, the damping torque applied by the damping assembly 23 to the winding drum 21 can make the winding drum 21 stop moving, that is, the resistance torque received by the winding drum 21 is greater than or equal to the tension force applied by the stretching mechanism 3 to the curtain 4.

[0058] In the above embodiment, since the damping assembly 23 is provided for the winding drum 21, a damping torque can be applied to the winding drum 21 through the damping assembly 23. Thus, the winding drum 21 can also remain stationary when receiving a rotational torque applied through the curtain 4. Furthermore, the curtain 4 can be stretched and flattened through the winding drum 21 and the fixing assembly 32, so that the unfolded curtain 4 is kept in a flat state.

[0059] In some possible embodiments of the present application, referring to Figure 7 and Figure 8 , Figure 7 is a schematic structural diagram of the damping assembly in the curtain drive device provided by the present application, Figure 8 is a schematic cross-sectional structural diagram of the damping assembly in the curtain drive device provided by the present application. The damping assembly 23 includes a first fixed seat 231, a damping shaft 232, and damping members 233. The first fixed seat 231 is fixedly connected to the base body 1. The damping shaft 232 is fixedly connected to the winding drum 21 and is coaxially arranged with the winding drum 21. At least two damping members 233 are stacked and sleeved on the damping shaft 232. Among them, along the circumferential direction of the winding drum 21, a part of the damping members 233 are fixedly connected to the damping shaft 232, and another part of the damping members 233 are fixedly connected to the first fixed seat 231.

[0060] In the embodiment of the present application, as Figure 7 and Figure 8As shown, a first fixing seat 231 can be provided in the damping assembly 23 to mount other parts in the damping assembly 23 through the first fixing seat 231, and the first fixing seat 231 can be fixedly connected to the base body 1 to fixedly mount the damping assembly 23 on the base body 1.

[0061] Exemplarily, the first fixing seat 231 can be set to include a fixing block 2311 and a sleeve 2312. A groove matching the sleeve 2312 can be provided on the fixing block 2311, at least a part of the sleeve 2312 can be received in the groove of the fixing block 2311, and the sleeve 2312 can be fixedly connected to the fixing block 2311 through fasteners such as screws. The sleeve 2312 can be set according to the structure of the damper 233. For example, the sleeve 2312 can be set to have a structure with a circular through-hole, and ridges can be provided on the inner wall of the circular through-hole.

[0062] In the embodiment of the present application, a damping shaft 232 can be provided in the damping assembly 23. For example, external threads can be provided at both ends of the damping shaft 232, and threaded holes matching the external threads on the damping shaft 232 can be provided on the winding drum 21. One end of the damping shaft 232 can be fixedly connected to the winding drum 21 through the external threads and the threaded holes. A structure matching the damper 233 can be provided in the middle part of the damping shaft 232. For example, grooves or planes can be provided on the damping shaft 232.

[0063] In the embodiment of the present application, as Figure 8 shown, at least two dampers 233 can be provided between the damping shaft 232 and the sleeve 2312, and a plurality of dampers 233 can be stacked and sleeved on the middle part of the damping shaft 232. A nut 234 can be provided at one end of the damping shaft 232 away from the winding drum 21, and a plurality of dampers 233 can be pressed and abutted through the nut 234.

[0064] Exemplarily, the damping member 233 may adopt a first damping sheet 2331 and a second damping sheet 2332 arranged alternately. Grooves matching the ridges on the sleeve 2312 may be provided on the circumferential surface of the first damping sheet 2331, such that the ridges are located within the grooves, and thus the relative rotation of the first damping sheet 2331 with respect to the sleeve 2312 can be restricted by the ridges and the grooves. Protrusions matching the grooves or planes on the damping shaft 232 may be provided on the inner wall of the through hole of the second damping sheet 2332, and thus the relative rotation of the second damping sheet 2332 with respect to the damping shaft 232 can be restricted by the planes and the protrusions. For example, four first damping sheets 2331 and four second damping sheets 2332 are arranged alternately in sequence and sleeved on the damping shaft 232, and a gasket 235 is provided between the damping sheets and the nut 234 serving as a fastener. In this way, by adjusting the pressing force applied by the nut 234 to the first damping sheet 2331 and the second damping sheet 2332, the magnitude of the frictional force between the first damping sheet 2331 and the second damping sheet 2332 can be adjusted, and thus the damping torque applied by the damping assembly 23 to the reel 21 can be adjusted.

[0065] In the above embodiment, since at least two damping members 233 are sleeved on the damping shaft 232, and a part of the damping members 233 is fixedly connected to the damping shaft 232, and another part of the damping members 233 is fixedly connected to the first fixing seat 231, the damping torque can be generated by the frictional force generated when the two parts of the damping members 233 rotate relative to each other, and the magnitude of the damping torque can be adjusted by adjusting the pressing force applied to the damping members 233, thereby facilitating the control of the damping torque.

[0066] In some possible embodiments of the present application, such as Figure 2 and Figure 3 shown, the stretching and driving assembly 31 further includes a swinging assembly 33. One end of the swinging assembly 33 is fixedly connected to the stretching and driving assembly 31, and the other end of the swinging assembly 33 is rotatably connected to the fixing assembly 32. Driven by the stretching and driving assembly 31, the swinging assembly 33 can swing within the swinging plane to drive the fixing assembly 32 to move in a direction away from or close to the base body 1.

[0067] In the embodiment of the present application, the stretching and driving assembly 31 and the fixing assembly 32 can be connected through the swinging assembly 33, such that the stretching and driving assembly 31 drives the swinging assembly 33 to swing, and the swinging of the swinging assembly 33 drives the fixing assembly 32 to rise or fall relative to the base body 1.

[0068] Exemplarily, the swing assembly 33 can be arranged to include a swing rod of a single rod-shaped structure. One end of the swing rod is fixedly connected to the tension driving assembly 31, and the other end of the swing rod is rotatably connected to the fixing assembly 32 through a hinge 334. For example, the hinge 334 can be slidably connected to the fixing assembly 32 along the length direction of the fixing assembly 32. And two sets of tension driving assemblies 31 can be provided, and each set of tension driving assemblies 31 is connected to the fixing assembly 32 through a swing rod. In this way, during the process of the tension driving assembly 31 driving the swing rod to swing within the swing plane, the other end of the swing rod slides relative to the fixing assembly 32, thereby pushing the fixing assembly 32 away from the base body 1 or pulling the fixing assembly 32 closer to the position near the base body 1. Among them, the swing plane can be a plane parallel to the plane where the curtain 4 is located after the curtain 4 is unfolded.

[0069] In the above embodiment, since the tension driving assembly 31 and the fixing assembly 32 are connected through the swing assembly 33, and the swing assembly 33 is arranged to swing relative to the base body 1, the movement of the fixing assembly 32 relative to the base body 1 can be driven by the swing of the swing assembly 33 relative to the base body 1, so that the fixing assembly 32 can apply a force away from the base body 1 to the curtain 4, facilitating the tensioning and flattening of the curtain 4.

[0070] In some possible embodiments of the present application, as Figure 2 and Figure 3 shown, the swing assembly 33 includes a first swing member 331 and a second swing member 332; the first fixed end of the first swing member 331 is fixedly connected to the tension driving assembly 31, the first swing end of the first swing member 331 is rotatably connected to the second swing end of the second swing member 332, and the third swing end of the second swing member 332 is rotatably connected to the fixing assembly 32.

[0071] In the embodiment of the present application, the swing assembly 33 can be arranged to include a structure of two swing members. For example, both swing members can be arranged to be rod-shaped structures to connect the tension driving assembly 31 and the fixing assembly 32 through the two rod-shaped swing members.

[0072] Exemplarily, the first fixed end of the first swing member 331 can be fixedly connected to the tension driving assembly 31, so that the first swing member 331 can be driven by the tension driving assembly 31 to swing relative to the base body 1, and thus the first swing end of the first swing member 331 (the end of the first swing member 331 far from the tension driving assembly 31) can move in a direction away from or close to the base body 1. The second swing end of the second swing member 332 can be rotatably connected to the first swing end of the first swing member 331. For example, a hinge 334 can be used to rotatably connect the first swing end and the second swing end. The third swing end of the second swing member 332 (the end of the second swing member 332 far from the first swing member 331) can be rotatably connected to the fixing assembly 32. For example, as Figure 5 shown, a fixing member 333 can be provided at the third swing end, the fixing member 333 is rotatably connected to the third swing end through a rotating shaft, and then the fixing member 333 is fixedly connected to the plugging member 321 in the fixing assembly 32 by screws or the like, so as to rotatably connect the second swing member 332 to the fixing assembly 32.

[0073] Another example, as Figure 5 shown, a receiving groove 324 matching the second swing member 332 can be provided on the plugging member 321. After the second swing member 332 rotates towards the plugging member 321, a part of the second swing member 332 can be received in the receiving groove 324. A cushion block 325 can also be provided in the receiving groove 324. The cushion block 325 has an arc-shaped surface matching the second swing member 332. The cushion block 325 can be made of a flexible material such as foam, so as to reduce the collision between the second swing member 332 and the plugging member 321 through the cushion block 325.

[0074] As Figure 3 shown, after the curtain 4 is unfolded by the winding mechanism 2 or during the process of unfolding the curtain 4, the tension driving assembly 31 can be controlled to drive the first swing member 331 to swing in a direction away from the center of the curtain 4. The first swing end of the first swing member 331 will drive the second swing end of the second swing member 332 to move in a direction away from the center of the curtain 4, and the third swing end of the second swing member 332 is rotatably connected to the fixing assembly 32. Thus, a force away from the base body 1 can be applied to the fixing assembly 32 through the two swing members, so as to stretch and flatten the curtain 4.

[0075] In the above embodiments, since the swing assembly 33 is set as the first swing member 331 and the second swing member 332 which are rotatably connected, the relative movement of the two swing members (a movement form similar to folding) can be controlled to drive the fixing assembly 32 to lift and lower relative to the base body 1. And after the first swing member 331 and the second swing member 332 are close to each other, both the first swing member 331 and the second swing member 332 can be received inside the base body 1, which is beneficial to reducing the space occupied after the curtain driving device is stored.

[0076] In some possible embodiments of the present application, with reference to Figure 9 , Figure 9 is a schematic structural view of the stretching drive assembly 31 in the curtain 4 drive device provided by the present application. The stretching drive assembly 31 includes a stretching drive member 311 and a driven shaft 312; the driven shaft 312 is rotatably arranged on the base body 1, the first fixed end of the first swinging member 331 is fixedly connected to the driven shaft 312, the stretching drive member 311 is fixed on the base body 1, and is in transmission connection with the driven shaft 312 through a stretching transmission member 313.

[0077] In the embodiments of the present application, as Figure 9 shown, a third fixed seat 316 (a partial structure of the third fixed seat 316 is shown in the figure) can be arranged in the stretching drive assembly 31, and the third fixed seat 316 can be arranged as a box structure with a cavity to install the stretching transmission member 313 in the third fixed seat 316 of the box structure.

[0078] Exemplarily, the stretching drive member 311 can adopt a motor, such as a servo motor, a stepping motor or an ordinary motor, etc. The stretching drive member 311 can be fixed on the third fixed seat 316. The driven shaft 312 can be rotatably arranged on the third fixed seat 316, for example, the driven shaft 312 can be passed through the third fixed seat 316 through a bearing. And the first fixed end of the first swinging member 331 can be fixedly connected to the driven shaft 312 to drive the first swinging member 331 to swing relative to the base body 1 through the driven shaft 312, wherein the axes of the driven shaft 312 and the first swinging member 331 can be perpendicular to each other. The third fixed seat 316 can be fixedly connected to the base body 1 to install the stretching drive assembly 31 on the base body 1 and enable the driven shaft 312 to rotate relative to the base body 1.

[0079] In another example, the stretching drive member 311 and the driven shaft 312 can be connected through a stretching transmission member 313. For example, the stretching transmission member 313 can adopt gears, chains and sprockets, belts and pulleys, etc. A speed reducer 314 can also be arranged between the stretching drive member 311 and the driven shaft 312. For example, the speed reducer 314 can adopt a gear reduction box, and the torque applied by the stretching drive member 311 to the driven shaft 312 can be increased through the speed reducer 314.

[0080] In the above embodiments, since the driven shaft 312 is rotatably arranged on the base body 1 and the first fixed end of the first swinging member 331 is fixedly connected to the driven shaft 312, the first swinging member 331 can swing relative to the base body 1 through the driven shaft 312. And the stretching drive member 311 and the driven shaft 312 are in transmission connection through the stretching transmission member 313, and the transmission ratio of the stretching drive member 311 and the driven shaft 312 can be controlled through the stretching transmission member 313 to facilitate the control of the rotation speed of the driven shaft 312.

[0081] In some possible embodiments of the present application, such as Figure 9 shown, the tensioning and pulling transmission member 313 includes a meshing worm 3131 and a worm wheel 3132. The worm 3131 is rotatably arranged on the base body 1 and is connected to the tensioning and pulling driving member 311, and the worm wheel 3132 is fixedly connected to the driven shaft 312.

[0082] In the embodiments of the present application, the tensioning and pulling driving member 311 and the driven shaft 312 can be transmission-connected through the worm wheel 3132 and the worm 3131. For example, the worm 3131 can be rotatably arranged in the third fixing seat 316. For example, a ball bearing is sleeved at each end of the worm 3131 to rotatably mount the worm 3131 in the third fixing seat 316 through the ball bearing. One end of the worm 3131 can be transmission-connected to the reducer 314 through a gear to connect the worm 3131 to the tensioning and pulling driving member 311. A through hole matching the driven shaft 312 can be provided on the worm wheel 3132, and the worm wheel 3132 is sleeved on the driven shaft 312, and a nut or the like can be used to press and fix the worm wheel 3132 on the driven shaft 312. In this way, during the process of the tensioning and pulling driving member 311 driving the worm 3131 to rotate, the worm 3131 can drive the worm wheel 3132 to rotate, and the worm wheel 3132 then drives the driven shaft 312 and the first swinging member 331 to rotate. After the first swinging member 331 moves to the position where the curtain 4 is tensioned and flattened, through the self-locking of the worm 3131 and the worm wheel 3132, the first swinging member 331 and the second swinging member 332 can be kept stationary relative to the base body 1 to continuously apply a force away from the base body 1 to the fixing assembly 32.

[0083] In the above embodiments, since the tensioning and pulling driving assembly 31 and the driven shaft 312 are transmission-connected through the worm wheel 3132 and the worm 3131, not only can the tensioning and pulling driving assembly 31 drive the driven shaft 312 to rotate through the worm wheel 3132 and the worm 3131, but also the self-locking function of the worm wheel 3132 and the worm 3131 can be utilized to keep the first swinging member 331 and the second swinging member 332 in the position after movement, so that a force away from the base body 1 can be continuously applied to the fixing assembly 32, and thus the curtain 4 can be continuously kept in a flat state.

[0084] In some possible embodiments of the present application, such as Figure 9 shown, the tensioning and pulling driving assembly 31 further includes a detecting member 315. The detecting member 315 is arranged on the base body 1 at a position corresponding to the driven shaft 312 for detecting the rotation angle of the driven shaft 312.

[0085] In the embodiments of the present application, a detection member 315 may be provided in the stretching and driving assembly 31 to detect the motion state of the stretching and driving assembly 31 by using the detection member 315, so as to determine the motion state of the swinging assembly 33. For example, the detection member 315 may be provided on the third fixed seat 316 and correspond to the driven shaft 312. For example, the detection member 315 may adopt an optoelectronic angle sensor. The light source may be provided on the driven shaft 312, and the light receiver may be provided on the third fixed seat 316. The light receiver can receive the light and convert it into an electrical signal, so that the rotation angle of the driven shaft 312 can be obtained, and thus the swinging position of the first swinging member 331 can be determined.

[0086] In the above embodiments, since the detection member 315 corresponding to the driven shaft 312 is provided on the base body 1, the rotation angle of the driven shaft 312 can be detected by the detection member 315, so that the motion position of the first swinging member 331 driven by the driven shaft 312 can be determined, which is beneficial to improving the accuracy of controlling the motion positions of the swinging assembly 33 and the fixing assembly 32.

[0087] In some possible embodiments of the present application, the detection member 315 includes a magnetic induction member and a magnetic member. One of the magnetic induction member and the magnetic member is fixedly provided on the base body 1, and the other of the magnetic induction member and the magnetic member is fixedly connected to the driven shaft 312 and rotates with the driven shaft 312.

[0088] In the embodiments of the present application, the detection member 315 may adopt a magnetic angle sensor to detect the rotation angle of the driven shaft 312 by using the change of the magnetic field. For example, the detection member 315 includes a magnetic induction member and a magnetic member. The magnetic induction member may adopt a Hall sensor, a magnetoresistive sensor, etc., and the magnetic member may adopt a permanent magnet such as a magnet.

[0089] Exemplarily, the magnetic induction member may be fixed at a position corresponding to the driven shaft 312 on the third fixed seat 316, and the magnetic member may be fixed at an end of the driven shaft 312 close to the third fixed seat 316. Or, the magnetic induction member may be fixed at an end of the driven shaft 312, and the magnetic member may be fixed at a position on the third fixed seat 316 close to the driven shaft 312. In this way, during the rotation of the driven shaft 312, the driven shaft 312 will drive one of the magnetic induction member and the magnetic member to rotate, so that the magnetic induction member and the magnetic member generate relative motion, thereby changing the magnetic field in the magnetic induction member, and further generating a current or voltage in the magnetic induction member, and thus the rotation angle of the driven shaft 312 can be determined.

[0090] In the above embodiments, since the detection member 315 includes a magnetic member and a magnetic induction member, an electrical signal can be generated by the change of the magnetic field of the magnetic induction member caused by the relative motion of the magnetic member and the magnetic induction member, so that the rotation angle of the driven shaft 312 can be determined according to the electrical signal.

[0091] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A curtain driving device, characterized in that, Comprising: a base body (1); a winding mechanism (2) which is arranged on the base body (1) and can rotate relative to the base body (1) to wind or unwind a curtain (4) connected to the winding mechanism (2); a stretching mechanism (3), wherein a stretching drive assembly (31) of the stretching mechanism (3) is arranged on the base body (1), a fixing assembly (32) of the stretching mechanism (3) is connected to one end of the curtain (4) away from the winding mechanism (2), and the fixing assembly (32) moves up and down relative to the base body (1) driven by the stretching drive assembly (31).

2. The curtain driving device according to claim 1, wherein The winding mechanism (2) includes a winding drive assembly (22) and a winding drum (21). The winding drum (21) is rotatably arranged on the base body (1). The winding drive assembly (22) is arranged on the base body (1) and is in transmission connection with the winding drum (21). The winding drive assembly (22) can drive the winding drum (21) to rotate, and the winding drum (21) is used for arranging the curtain (4).

3. The curtain driving device according to claim 2, characterized in that, The winding mechanism (2) further includes a damping assembly (23). The damping assembly (23) is arranged on the base body (1) and is connected to the winding drum (21). The damping assembly (23) is used for applying resistance to the winding drum (21) to limit the rotation of the winding drum (21).

4. The curtain driving device according to claim 3, wherein The damping assembly (23) includes a first fixed seat (231), a damping shaft (232) and damping members (233). The first fixed seat (231) is fixedly connected to the base body (1). The damping shaft (232) is fixedly connected to the winding drum (21) and is coaxially arranged with the winding drum (21). At least two damping members (233) are stacked and sleeved on the damping shaft (232); wherein, along the circumferential direction of the winding drum (21), a part of the damping members (233) is fixedly connected to the damping shaft (232), and another part of the damping members (233) is fixedly connected to the first fixed seat (231).

5. The curtain driving device according to any one of claims 1 to 4, characterized in that, The stretching drive assembly (31) further includes a swinging assembly (33). One end of the swinging assembly (33) is fixedly connected to the stretching drive assembly (31), and the other end of the swinging assembly (33) is rotatably connected to the fixing assembly (32). Driven by the stretching drive assembly (31), the swinging assembly (33) can swing relative to the base body (1) to drive the fixing assembly (32) to move in a direction away from or close to the base body (1).

6. The curtain driving device according to claim 5, characterized in that, The swinging assembly (33) includes a first swinging member (331) and a second swinging member (332); a first fixed end of the first swinging member (331) is fixedly connected to the stretching drive assembly (31), a first swinging end of the first swinging member (331) is rotatably connected to a second swinging end of the second swinging member (332), and a third swinging end of the second swinging member (332) is rotatably connected to the fixing assembly (32).

7. The curtain driving device according to claim 6, wherein The stretching and driving assembly (31) includes a stretching and driving member (311) and a driven shaft (312); the driven shaft (312) is rotatably arranged on the base body (1), a first fixed end of the first swinging member (331) is fixedly connected to the driven shaft (312), the stretching and driving member (311) is fixed on the base body (1) and is in transmission connection with the driven shaft (312) through a stretching transmission member (313).

8. The curtain driving device according to claim 7, characterized in that, The stretching transmission member (313) includes a meshing worm (3131) and a worm wheel (3132), the worm (3131) is rotatably arranged on the base body (1) and is connected to the stretching and driving member (311), and the worm wheel (3132) is fixedly connected to the driven shaft (312).

9. The curtain driving device according to claim 7 or 8, characterized in that, The stretching and driving assembly (31) further includes a detecting member (315), the detecting member (315) is arranged at a position corresponding to the driven shaft (312) on the base body (1) for detecting the rotation angle of the driven shaft (312).

10. The curtain driving device according to claim 9, wherein The detecting member (315) includes a magnetic induction member and a magnetic member, one of the magnetic induction member and the magnetic member is fixedly arranged on the base body (1), and the other of the magnetic induction member and the magnetic member is fixedly connected to the driven shaft (312) and rotates with the driven shaft (312).

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