Roller shutter and rolling driving device thereof

Abstract

The utility model provides a roller shutter and a rolling driving device thereof, and the roller shutter rolling driving device comprises a mounting bracket, a roller shutter driving device and a roller shutter driving device, and the mounting bracket is rotatably connected with a mounting seat used for sleeving a winding drum; the rotating units are arranged in the winding drum, the axial direction of each rotating unit is parallel to the axial direction of the winding drum, each rotating unit comprises a rotating support, a follow-up rolling shaft, a transmission rolling shaft and a volute spring, the follow-up rolling shafts and the transmission rolling shafts are rotationally assembled on the rotating supports, the volute springs are fixedly arranged on the follow-up rolling shafts in a sleeving mode, and the free ends of the volute springs are fixed to the transmission rolling shafts; and the power conversion assembly is used for being in linkage with the transmission rolling shaft and the mounting base to rotate synchronously. Due to the fact that the axial direction of the rotating unit is parallel to the axial direction of the winding drum, and the curling face of the volute spring is consistent with the wall of the winding drum, even if the volute spring is attached to the wall of the winding drum in the action process, the clamping phenomenon cannot occur, the volute spring can be set to be wider, and the stroke can be set to be longer.

Description

Technical Field

[0001] This utility model relates to the field of curtain technology, and in particular to a roller blind and its winding drive device. Background Technology

[0002] Existing spring roller blinds typically include a drive unit, a coil spring, a damper, and a limiter, all housed within the winding drum. To lower the blind, simply pull down the fabric. The fabric rotates the winding drum, causing it to twist relative to the coil spring and accumulate elastic force. Simultaneously, the damper allows the fabric to remain at any height within its effective travel range. To raise the blind, simply push it upwards. The coil spring's force overcomes the damper's resistance, causing the winding drum to rotate in the opposite direction, thus rewinding the fabric back onto the drum.

[0003] For example, Chinese utility model patent CN210396595U discloses a roller blind drive device, which achieves the winding action by setting a driver inside the winding drum and transmitting power between the shaft and the driver through a transmission mechanism. However, because the driver of this roller blind drive device is arranged laterally inside the winding drum, the spiral spring on the driver will expand and compress the winding drum wall during operation. Due to the limitation of the drum wall, the stroke of the spiral spring will be relatively short, and it is easy to jam with the winding drum wall, which is difficult to meet the current application requirements. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a roller blind and its winding drive device, which has the advantages of allowing the worm spring to be set wider and the stroke to be set longer.

[0005] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0006] The first aspect of the present invention discloses a roller blind winding drive device, comprising:

[0007] Mounting bracket, on which a mounting seat for mounting a winding cylinder is rotatably connected;

[0008] At least one set of rotating units disposed within a winding drum, the axial direction of the rotating unit being parallel to the axial direction of the winding drum, comprising: a rotating bracket, a follower roller and a transmission roller rotatably mounted on the rotating bracket, and a worm spring, wherein the worm spring is sleeved and fixed to the follower roller, and its free end is fixed to the transmission roller; and,

[0009] A power conversion component is disposed between the mounting base and the rotating unit, the power conversion component being used to drive the transmission roller and the mounting base to rotate synchronously.

[0010] To achieve the above technical solution, the mounting bracket is used to assemble with the wall or curtain box. When the roller blind is pulled down, it drives the roller drum to rotate, which in turn drives the mounting base and rotating unit to rotate. During the rotation, power is transmitted to the rotating unit. At this time, the power conversion component causes the transmission roller to rotate synchronously, causing the spiral spring to undergo elastic deformation and gradually wind up onto the transmission roller. Because the torque of the spiral spring is relatively small and can usually be balanced with the weight of the roller blind rod, the roller blind will not automatically return to its original position after being pulled to the end. When it is necessary to retract the roller blind, gently lift the roller blind rod upward to break the gravitational balance. The rotating bracket rotates in the opposite direction under the elastic force of the worm spring, which in turn drives the winding drum to flip and rewind the curtain back onto the drum. Since the axis of the rotating unit is parallel to the axis of the winding drum, and the coiled surface of the worm spring is consistent with the wall of the winding drum, there will be no jamming even if it is in contact with the wall of the winding drum during operation. Therefore, the worm spring can be set to be wider and the stroke can be set to be longer. At the same time, at least one rotating unit can be set. One or more rotating units can be set according to the span of the roller blind, so as to meet the usage needs of roller blinds of different widths.

[0011] In one embodiment of the present invention, the rotating unit is provided in multiple sets, and the multiple sets of rotating units are sequentially spliced ​​together and located inside the winding cylinder.

[0012] To achieve the above technical solution, multiple rotating units are connected by splicing, which is simple and can meet the needs of roller blinds of different widths.

[0013] In one embodiment of the present invention, the power conversion component includes: a rotating gear with its two ends respectively connected to the mounting base and the rotating bracket, and a transmission gear connected to the transmission roller and meshing with the rotating gear. When the roller shutter rotates, the transmission gear rotates around the rotating gear.

[0014] To achieve the above technical solution, when the rotating unit rotates synchronously with the winding drum, the transmission gear will rotate around the rotating gear, thereby driving the transmission roller to rotate and causing the winding spring to undergo elastic deformation.

[0015] In one embodiment of the present invention, the mounting bracket is provided with a connecting convex shaft, the mounting seat is rotatably connected to the connecting convex shaft, and the rotating gear is fixed to the end of the connecting convex shaft.

[0016] To achieve the above technical solution, a connecting cam shaft is used to provide a rotating mounting base for the mounting seat and a mounting platform for the rotating gear.

[0017] In one embodiment of the present invention, the rotating bracket includes a first frame and a second frame that are interlocked with each other. A first support column and a second support column are provided between the first frame and the second frame to form a support. The first frame and the second frame are provided with interlocking elastic claws and buckling protrusions for locking and fixing adjacent rotating units.

[0018] To achieve the above technical solution, the first and second pillars cooperate to form a stable support structure after the first and second frames are connected, and an installation space is formed within the rotating support. The connection and fixation of the first and second frames are achieved by the interlocking of elastic claws and buckle protrusions.

[0019] In one embodiment of this utility model, the transmission roller is provided with a connecting fastener for engaging with the worm spring.

[0020] To achieve the above technical solution, a fastener is used to facilitate connection and fixation with the free end of the coil spring.

[0021] In one embodiment of the present invention, the two ends of the transmission roller are respectively provided with mutually cooperating prisms and prism holes, and the transmission rollers of adjacent rotating units are connected through the prisms and prism holes.

[0022] To achieve the above technical solution, by using the prism and the prism hole to cooperate, it is possible to position and install adjacent rotating units while allowing adjacent transmission rollers to rotate synchronously.

[0023] In one embodiment of the present invention, a connecting housing covering the power conversion component is also connected to the rotating unit located near the mounting base, and the transmission gear is rotatably connected to the connecting housing.

[0024] The above technical solution can protect the power conversion components by connecting the housing and provide a platform for the rotational connection of the transmission gears.

[0025] In one embodiment of the present invention, a decorative cover is also snap-fitted onto the outside of the rotating unit located on the side away from the mounting base.

[0026] The present invention discloses a second aspect of a roller blind, including a roller blind winding drive device as described in the first aspect, wherein a curtain fabric is wound onto the winding drum.

[0027] As described above, the present invention has the following beneficial effects:

[0028] This utility model embodiment provides a roller blind and its winding drive device. The roller blind winding drive device includes: a mounting bracket with a mounting seat rotatably connected to it for mounting a winding cylinder; a plurality of rotating units arranged inside the winding cylinder and connected in sequence, the axial direction of each rotating unit being parallel to the axial direction of the winding cylinder, and including: a rotating bracket, a follower roller and a transmission roller rotatably mounted on the rotating bracket, and a worm spring, the worm spring being fixedly mounted on the follower roller and its free end being fixed to the transmission roller; and a power conversion component disposed between the mounting seat and the rotating unit, the power conversion component being used to drive the transmission roller and the mounting seat to rotate synchronously. The mounting bracket is used to assemble with the wall or curtain box. When the roller blind is pulled down, it drives the roller drum to rotate, which in turn drives the mounting base and rotating unit to rotate. During the rotation, power is transmitted to the rotating unit. At this time, the power conversion component causes the drive roller to rotate synchronously, causing the spiral spring to elastically deform and gradually wind up onto the drive roller. Because the torque of the spiral spring is small and can usually be balanced with the weight of the roller blind rod, the roller blind will not automatically return to its original position after being pulled up. When it is necessary to roll up, gently lift the roller blind rod upward to break the gravitational balance. At this time, the rotating bracket... Under the elastic force of the worm spring, it will rotate in the opposite direction, thereby driving the winding drum to flip and rewind the curtain back onto the winding drum. Since the axis of the rotating unit is parallel to the axis of the winding drum, and the coiled surface of the worm spring is consistent with the wall of the winding drum, even if it is in contact with the wall of the winding drum during operation, there will be no jamming. Therefore, the worm spring can be set to be wider and the stroke can be set to be longer. At the same time, at least one rotating unit can be set. One or more rotating units can be set according to the span of the roller blind, so as to meet the usage needs of roller blinds of different widths. Attached Figure Description

[0029] Figure 1 The diagram shown is a structural schematic of the assembly of the roller blind winding drive device and the winding drum in an embodiment of this utility model.

[0030] Figure 2 The diagram shown is a structural schematic of the roller blind winding drive device in an embodiment of this utility model.

[0031] Figure 3 The diagram shown is a structural schematic of the roller blind winding drive device in an embodiment of this utility model, excluding the connecting cover and the decorative cover.

[0032] Figure 4 The diagram shown is a structural schematic of the rotating unit in the roller blind winding drive device in an embodiment of this utility model.

[0033] Figure 5 The diagram shown is a structural schematic of the roller blind in an embodiment of this utility model.

[0034] Component designation explanation

[0035] 10. Mounting bracket; 11. Mounting base; 12. Insert groove; 13. Connecting convex shaft; 20. Winding drum; 21. Spine; 30. Rotating unit; 31. Rotating bracket; 311. First frame; 312. Second frame; 313. First support column; 314. Second support column; 315. Elastic claw; 316. Snap-on protrusion; 32. Follower roller; 33. Transmission roller; 34. Snail spring; 35. Connecting fastener; 36. Prism; 37. Prism hole; 38. Connecting cover; 39. Decorative cover; 40. Power conversion component; 41. Rotating gear; 42. Transmission gear; 50. Curtain. Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] Please see Figures 1 to 4 The first aspect of this utility model provides a roller shutter winding drive device, including: a mounting bracket 10, on which a mounting seat 11 for mounting a winding cylinder 20 is rotatably connected; at least one set of rotating units 30 disposed within the winding cylinder 20; and a power conversion component 40 disposed between the mounting seat 11 and the rotating units 30.

[0038] Specifically, the mounting bracket 10 is an L-shaped mounting plate with several waist-shaped slots for inserting bolts and other fasteners to fix it to the wall or curtain box. The mounting bracket 10 is provided with a connecting convex shaft 13, which is fixed by a claw on the mounting bracket 10. The mounting seat 11 is rotatably connected to the connecting convex shaft 13 through a bearing, and a groove 12 is formed on the mounting seat 11. The winding drum 20 is provided with a ridge 21 that engages with the groove 12. The engagement connection between the winding drum 20 and the groove 12 is achieved by the ridge 21 engaging with the groove 12.

[0039] The axis of the rotating unit 30 is parallel to the axis of the winding drum 20. The rotating unit 30 can be set in one or more groups as needed. When multiple rotating units 30 are set, the multiple rotating units 30 are spliced ​​together in sequence and located inside the winding drum 20. The multiple rotating units 30 are connected by splicing, which is a simple connection method and can meet the needs of roller blinds of different widths.

[0040] The rotating unit 30 specifically includes: a rotating bracket 31, a follower roller 32 and a transmission roller 33 rotatably mounted on the rotating bracket 31, and a worm spring 34. The worm spring 34 is fixedly mounted on the follower roller 32, and its free end is fixed to the transmission roller 33. The rotating bracket 31 includes a first frame 311 and a second frame 312 that are interlocked. A first support column 313 and a second support column 314 are provided between the first frame 311 and the second frame 312 to form a support. In this embodiment, the first support column 313 and the second support column 314 are provided at opposite corners of the first frame 311 and the second frame 312. The first frame 311 and the second frame 312 are provided with interlocking elastic claws 315 and snap-fit ​​protrusions 316 for snapping and fixing adjacent rotating units 30. Preferably, claws and snap-fit ​​protrusions 316 are provided on the upper and lower sides of the first frame 311 and the second frame 312, so as to connect adjacent rotating units 30 more stably. Furthermore, a connecting fastener 35 is provided on the transmission roller 33 for engaging with the worm spring 34. The free end of the worm spring 34 may be provided with a bayonet or other structure to be adapted to the connecting fastener 35, so as to realize the connection and fixation of the two. The connecting fastener 35 facilitates the connection and fixation with the free end of the worm spring 34.

[0041] The first support column 313 and the second support column 314 cooperate to form a stable support structure after the first frame 311 and the second frame 312 are connected, and an installation space is formed in the rotating support 31. The first frame 311 and the second frame 312 are connected and fixed by the interlocking of the elastic claw 315 and the snap-fit ​​protrusion 316.

[0042] Furthermore, the two ends of the transmission roller 33 are respectively provided with mutually cooperating prisms 36 and prism holes 37. The transmission rollers 33 of adjacent rotating units 30 are connected by transmission through prisms 36 and prism holes 37. By cooperating with prisms 36 and prism holes 37, the adjacent rotating units 30 can be positioned and installed at the same time, and the adjacent transmission rollers 33 can rotate synchronously. It can be understood that in some embodiments, mutually cooperating protrusions and guide holes can also be provided between the first frame 311 and the second frame 312 of adjacent rotating units 30. By the interlocking of protrusions and guide holes, the connection between prisms 36 and prism holes 37 is made more stable for the connection of adjacent rotating units 30.

[0043] The power conversion assembly 40 is used to drive the transmission roller 33 and the mounting base 11 to rotate synchronously. The power conversion assembly 40 specifically includes: a rotating gear 41 with its two ends connected to the mounting base 11 and the rotating bracket 31 respectively, and a transmission gear 42 connected to the transmission roller 33 and meshing with the rotating gear 41. When the roller shutter rotates, the transmission gear 42 rotates around the rotating gear 41. When the rotating unit 30 rotates synchronously with the winding drum 20, the transmission gear 42 will rotate around the rotating gear 41, thereby driving the transmission roller 33 to rotate and the winding worm spring 34 to produce elastic deformation.

[0044] The rotating gear 41 is fixed to the end of the connecting cam 13. For example, the rotating gear 41 is provided with a shaft end, which is inserted into the end of the connecting cam 13. Corresponding locking holes are provided on the shaft end and the connecting cam 13. The two are fixed by inserting a pin or screwing in a screw in the locking hole.

[0045] Meanwhile, a connecting housing 38, which covers the power conversion component 40, is also connected to the rotating unit 30 located near the mounting base 11. The transmission gear 42 is rotatably connected to the connecting housing 38. The connecting housing 38 protects the power conversion component 40 and provides a platform for the rotational connection of the transmission gear 42. Correspondingly, a decorative housing 39 is also snap-fitted to the rotating unit 30 located away from the mounting base 11 to improve the overall aesthetics of the device.

[0046] Mounting bracket 10 is used for assembly with the wall or curtain box. When the roller blind is pulled down, it drives the winding drum 20 to rotate, and simultaneously drives the mounting base 11 and the rotating unit 30 to rotate. During the rotation, power is transmitted to the rotating unit 30. At this time, the power conversion component 40 causes the transmission roller 33 to rotate synchronously, causing the spiral spring 34 to undergo elastic deformation and gradually wind up onto the transmission roller 33. Since the torque of the spiral spring 34 is small and can usually be balanced with the weight of the roller blind rod, the roller blind will not automatically return to its original position after being pulled up. When it is necessary to rewind, the roller blind rod is gently lifted upward to break the gravitational balance. At this time, the rotating bracket 31 will rotate in the opposite direction under the action of the elastic force of the spiral spring 34, thereby driving the winding drum 20 to flip. Turn the curtain fabric 50 back onto the winding drum 20. Since the axis of the rotating unit 30 is parallel to the axis of the winding drum 20, and the curling surface of the worm spring 34 is consistent with the wall of the winding drum 20, even if it is in contact with the wall of the winding drum 20 during operation, there will be no jamming. Therefore, the worm spring 34 can be set to be wider and the stroke can be set to be longer. At the same time, at least one rotating unit 30 can be set. One or more rotating units 30 can be set according to the span of the roller blind, so as to meet the usage requirements of roller blinds of different widths. In addition, the roller blind winding drive device of this utility model can also be set with various specifications to make it suitable for winding drums 20 with various apertures such as 25, 28, 32, and 38 mm.

[0047] A second aspect of this utility model provides a roller blind, such as... Figure 5 As shown, the device includes a roller blind winding drive as described in the first aspect. A curtain 50 is wound on the winding drum 20. When the curtain 50 is pulled down, the winding drum 20 can rotate to unwind the curtain 50.

[0048] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A roller shutter winding drive device, characterized in that, The application relates to a winding drive device for a roller blind. The winding drive device comprises a mounting bracket, a mounting seat for sleeving a winding drum rotatably connected to the mounting bracket, at least one set of rotating units arranged in the winding drum and parallel to the axial direction of the winding drum, a rotating bracket, a transmission roller rotatably assembled to the rotating bracket, a worm spring, a connecting shell cover, and a decorative shell cover. The rotating units are arranged in multiple sets and are sequentially connected and located in the winding drum. The power conversion assembly comprises a rotating gear connected to the mounting seat and the rotating bracket respectively, and a transmission gear connected to the transmission roller and engaged with the rotating gear. The mounting bracket is provided with a connecting convex shaft, the mounting seat is rotatably connected to the connecting convex shaft, and the rotating gear is fixed to the end of the connecting convex shaft.

2. The roller shade rolling drive of claim 1, wherein, The rotating bracket comprises a first bracket body and a second bracket body which are buckled to each other, first and second supporting columns are arranged between the first bracket body and the second bracket body to support each other, and elastic clamping claws and clamping blocks are arranged between the first bracket body and the second bracket body to clamp and fix adjacent rotating units.

3. The roller shade rolling drive of claim 1, wherein, The transmission roller is provided with a connecting buckle for clamping the worm spring.

4. The roller shade rolling drive of claim 3, wherein, The transmission roller is provided with a prism and a prism hole matched with each other at two ends of the transmission roller, and the transmission rollers of adjacent rotating units are transmissionally connected through the prism and the prism hole.

5. The roller shade rolling drive of claim 1, wherein, The rotating unit located on the side close to the mounting seat is further connected with the connecting shell cover covering the power conversion assembly, and the transmission gear is rotatably connected to the connecting shell cover.

6. The roller shade rolling drive of claim 1, wherein, The rotating unit located on the side away from the mounting seat is further connected with the decorative shell cover.

7. The roller shade rolling drive of claim 1, wherein, The application further relates to a roller blind comprising the winding drive device according to any one of claims 1-9, and the curtain cloth is wound on the winding drum.

8. The roller shade rolling drive of claim 3 or 4, wherein, ​ 9. The roller shade rolling drive of claim 1, wherein, ​ 10. A roller shade, comprising: ​

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