WO2024044960A1

WO2024044960A1 - Roller blinds driving device

Info

Publication number: WO2024044960A1
Application number: PCT/CN2022/115803
Authority: WO
Inventors: 雷振邦; 雷兴邦
Original assignee: 东莞市雷富溢窗饰科技有限公司
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2024-03-07

Abstract

A roller blinds driving device, comprising: a main shaft (3) arranged coaxially with a rolling cylinder (2), wherein the main shaft (3) comprises a fixed end (30) and a free end (32), and the free end (32) is further fixedly provided with a main gear (34); a spring driver (4), wherein the spring driver (4) comprises a spring frame (40) fixed relative to the rolling cylinder (2) in the circumferential direction, a transmission shaft (42) pivoted on the spring frame (40), and planar scroll springs (44) assembled on the spring frame (40) and having outer ends fixed onto the transmission shaft (42), and output end of the transmission shaft (42) is coaxially and fixedly provided with a planetary gear (46) engaged with the main gear (34); and a support bushing (5). The support bushing (5) is further fixed onto the spring frame (40), the fixed end (30) of the main shaft (3) is further provided with an adjusting part (36) used for driving the main shaft (3) to rotate, an outer pin hole (50) that makes the inside and the outside of the support bushing (5) communicated is formed on the sidewall of the support bushing (5), an inner pin hole (38) is correspondingly formed on the outer sidewall of the main shaft (3), and when the main shaft (3) is driven by the adjusting part (36) to rotate until the inner pin hole (38) is aligned with the outer pin hole (50), a safety pin is inserted into the inner pin hole (38) and the outer pin hole (50) so that the main shaft (3) is fixed relative to the support bushing (5). The device can achieve automatic rolling of a blinds fabric to an initial state.

Description

Roller blind drive

Technical field

Embodiments of the present application relate to the technical field of curtain accessories, and in particular, to a roller blind driving device.

Background technique

During the specific installation process of roller blinds, it is usually necessary to first rotate the drive shaft of the roller blind drive device to drive the flat scroll spring to be pre-wound on the drive shaft to accumulate elastic potential energy and lock the drive shaft with a safety pin to make the drive device It has a predetermined size of driving force that can drive the curtain fabric to rise and wind. This pre-operation is usually called preloading. Preloading can be performed by the manufacturer before the roller blind drive device leaves the factory, or it can be performed by the end user after using the roller blind drive device. Before assembling the curtains, after completing the assembly of the curtains, you only need to remove the safety pin, and the rolling curtain driving device can drive the winding drum to rotate by itself to drive the curtain fabric up and wind it onto the winding drum as a whole, so that the curtain fabric is in an unshielded state. , and then pull down the curtain, the flat scroll spring can be wound onto the transmission shaft again, thus realizing the cycle process of the flat scroll spring of the roller blind drive device accumulating elastic potential energy and releasing elastic potential energy.

An existing roller blind driving device includes: a spring frame assembled in the winding drum circumferentially fixed relative to the winding drum of the roller blind, and a spring frame arranged on the spring frame parallel to the axial direction of the spring frame. A spring shaft and a transmission shaft, a flat scroll spring that is wound around the spring shaft and has an outer end fixed to the transmission shaft, an inner end that is drivingly connected to the transmission shaft and an outer end that is relatively fixed to the support frame. The main shaft; in addition, in order to effectively support the winding drum and facilitate the relative rotation of the main shaft and the winding drum, a support bushing is usually set on the outside of the main shaft and is fixed relative to one end of the winding drum in the circumferential direction, so The support bushing and the spring frame are relatively independent, and the two are not relatively fixed.

However, the applicant found during implementation that when assembling curtains using the above-mentioned roller blind driving device, since the transmission shaft is not exposed, if the pre-tightening operation is to be performed, the main shaft can only be driven to drive the transmission shaft to rotate and the operation is completed. However, there is no relatively fixed connection relationship between the support bushing, the main shaft and the spring frame of the existing rolling shutter drive device, and the main shaft cannot be effectively locked. As a result, the pre-tightening operation cannot be effectively performed, and the pre-tightening operation can only be performed during assembly. Previously, the user had to turn the winding drum to roll up the curtain fabric, which was time-consuming and labor-intensive, and the user experience was poor.

technical problem

The technical problem to be solved by the embodiments of the present application is to provide a rolling shutter driving device that can effectively realize the pre-tightening operation.

Technical solutions

In order to solve the above technical problems, embodiments of the present application provide the following technical solution: a roller blind driving device, used to drive a winding drum whose two ends are respectively pivoted to corresponding support frames and for corresponding winding of curtain fabrics, including:

A main shaft arranged coaxially with the winding drum. The main shaft includes a fixed end for being fixed to the support frame and a free end for inserting into the winding drum. The free end is also fixed with a main shaft. gear;

Spring driver, the spring driver includes a spring frame that is relatively fixed to the winding drum in the circumferential direction, a transmission shaft that is pivoted on the spring frame, and a transmission shaft that is assembled on the spring frame and has an outer end fixed to the transmission A planar scroll spring on the shaft, the output end of the transmission shaft is coaxially fixed with a planetary gear meshing with the main gear; and

A support bushing that is sleeved on the outside of the main shaft and fixed relative to the winding drum in the circumferential direction;

The support bushing is also fixed on the spring frame, the fixed end of the main shaft is also provided with an adjustment part for driving the main shaft to rotate, and the side wall of the support bushing is provided with a connecting part to communicate with the support bushing. There are outer pin holes inside and outside, and an inner pin hole is correspondingly provided on the outer wall of the spindle. The spindle is driven by the adjusting part to rotate until the inner pin hole is aligned with the outer pin hole, and a safety pin is inserted to connect with the support. The bushing is relatively fixed.

Furthermore, the middle part of the end face of the spring frame close to the main shaft is also protruding to form a plug-in column. The plug-in column is inserted into the end of the support bushing close to the spring frame and connected with the support bushing. Corresponds to fixed connections.

Furthermore, a fixing hole whose central axis coincides with the central axis of the main shaft is recessed on the outer end surface of the plug-in column, and the plug-in column is also provided with a hole that penetrates the axial direction in an axial direction away from the axis. The pivot hole of the plug-in column, one end of the shaft of the main gear is coaxially fixed with the main shaft, and the other end is inserted and fixed in the fixed hole, and the output end of the transmission shaft passes through the pivot hole. , one end of the shaft of the planetary gear is coaxially fixed with the output end.

Further, the inner hole of the support bushing is in the shape of a stepped hole, including a small diameter section corresponding to the main shaft and a large diameter section corresponding to the main gear and the planet gear. The butt joint between the small diameter section and the large diameter section is The support bushing is connected to an annular plate perpendicular to the axial direction. An axis hole is provided on the inner wall of the annular plate corresponding to the position of the shaft of the planetary gear. The other end of the shaft of the planetary gear is correspondingly pivoted to the shaft. inside the shaft hole.

Furthermore, a flange plate is formed radially outwardly on one end of the small diameter section away from the large diameter section, and the outer pin hole is provided on the flange plate.

Furthermore, the outer wall of the plug-in column also projects symmetrically and radially to form a plurality of positioning plugs, and the inner wall of the large-diameter section is correspondingly formed with a slot for the positioning plugs to be inserted.

Further, the outer diameter of the annular plate is larger than the outer diameter of the large diameter section, and a first locking groove is formed on the edge of the annular plate for correspondingly engaging with the winding drum and relatively fixed in the circumferential direction.

Further, the spring driver further includes a mandrel arranged parallel to the transmission shaft and pivoted on the spring frame, and the inner end of the planar scroll spring is fixed on the mandrel.

Further, the spring frame is provided with a plurality of partitions with a plate surface perpendicular to the axial direction of the transmission shaft to divide the spring frame into a plurality of assembly slots distributed side by side along the axial direction of the transmission shaft. At least one assembly The planar scroll spring is assembled in the groove, and the transmission shaft and the mandrel pass through each of the partitions correspondingly.

Further, a second locking groove is formed on the edge of the partition plate for corresponding locking with the winding drum and relatively fixed in the circumferential direction.

beneficial effects

After adopting the above technical solution, the embodiments of the present application at least have the following beneficial effects: In the embodiment of the present application, the support bushing is fixed on the spring frame, and an adjustment part is provided at the fixed end of the main shaft. The main shaft can be rotated through the adjustment part. , and then drive the transmission shaft to rotate so that the planar scroll spring is wound on the transmission shaft for a predetermined length, and then the safety pin is inserted into the inner pin hole and the outer pin hole correspondingly, so as to realize the main shaft, support bushing, and spring frame. The relative fixation can prevent the flat scroll spring from driving the support bushing and the main shaft to rotate relative to the spring frame, thereby effectively completing the preloading operation. This makes it easier for the user to assemble the curtain. When the curtain is assembled, just pull out the safety pin, and the flat scroll spring will release the elastic potential energy to drive the transmission shaft to rotate, prompting the winding drum to rotate and roll up the curtain fabric, and finally the curtain fabric will be in the The entire system is rolled up to an unshielded state on the winding drum, eliminating the need for the user to manually turn the winding drum to wind up the curtain fabric before assembly, which improves the convenience of installation and provides a better user experience.

Description of drawings

Figure 1 is a disassembled structural schematic diagram of an optional embodiment of the rolling shutter driving device of the present application.

Figure 2 is a schematic assembly structure diagram of an optional embodiment of the rolling shutter driving device of the present application.

Figure 3 is a schematic diagram of the assembly structure of another optional embodiment of the rolling shutter driving device of the present application.

Figure 4 is a schematic cross-sectional structural diagram of an optional embodiment of the rolling shutter driving device of the present application.

Figure 5 is a structural schematic diagram of the installation of the main shaft and the support frame of another optional embodiment of the rolling shutter driving device of the present application.

Figure 6 is a schematic structural diagram of an optional embodiment of the rolling shutter driving device of the present application with the core shaft and transmission shaft separated.

Figure 7 is a schematic structural diagram of the main shaft of another optional embodiment of the rolling shutter driving device of the present application.

本申请的实施方式Implementation Mode of this Application

The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present application and are not intended to limit the present application. Moreover, if there is no conflict, the embodiments and features in the embodiments can be combined with each other. .

As shown in Figures 1 to 4, an optional embodiment of the present application provides a roller blind driving device for driving a winding drum whose two ends are respectively pivoted to the corresponding support frame 1 and for the curtain fabric 20 to be wound accordingly. 2, including:

A main shaft 3 is arranged coaxially with the winding drum 2. The main shaft 3 includes a fixed end 30 for being fixed to the support frame 1 and a free end 32 for inserting into the winding drum 2, so The free end 32 is also fixed with a main gear 34;

Spring driver 4. The spring driver 4 includes a spring frame 40 that is fixed relative to the winding drum 2 in the circumferential direction, a transmission shaft 42 pivoted on the spring frame 40, and a transmission shaft 42 assembled on the spring frame 40. The outer end of the planar scroll spring 44 is fixed on the transmission shaft 42. The output end of the transmission shaft 42 is coaxially fixed with a planetary gear 46 that meshes with the main gear 34; and

A support bushing 5 that is sleeved on the outside of the main shaft 3 and fixed relative to the winding drum 2 in the circumferential direction;

The support bushing 5 is also fixed on the spring frame 40. The fixed end 30 of the main shaft 3 is also provided with an adjustment part 36 for driving the rotation of the main shaft 3. The side wall of the support bushing 5 is provided with There is an outer pin hole 50 that communicates with the inside and outside of the support bushing 5. An inner pin hole 38 is correspondingly provided on the outer wall of the main shaft 3. The main shaft 3 is driven by the adjustment part 36 to rotate to the position between the inner pin hole 38 and the outer pin. When the hole 50 is aligned, a safety pin 39 is inserted to be fixed relative to the support bushing 5 .

In the embodiment of the present application, the support bushing 5 is fixed on the spring frame 40, and an adjusting part 36 is provided on the fixed end 30 of the main shaft 3. The main shaft 3 can be rotated through the adjusting part 36, thereby driving the transmission shaft 42 to rotate. The planar scroll spring 44 is wound to a predetermined length on the transmission shaft 42, and then the safety pin 39 is inserted into the inner pin hole 38 and the outer pin hole 50 correspondingly, so as to realize the main shaft 3, the support bushing 5, and the spring frame 40. The relative fixation can prevent the flat scroll spring 44 from driving the support bushing 5 and the main shaft 3 to rotate relative to the spring frame 40, thereby effectively completing the preloading operation. Therefore, it is convenient for the user to assemble the curtain. When the curtain assembly is completed, the user only needs to pull out the safety pin 39, and the planar scroll spring 44 will release the elastic potential energy to drive the transmission shaft 42 to rotate, thereby prompting the winding drum 2 to rotate and roll up the curtain fabric 20. , and finally the curtain fabric 20 is in an unshielded state in which the whole body is rolled up to the winding drum 2. It is no longer necessary for the user to manually turn the winding drum 2 to wind up the curtain fabric 20 before assembly, which improves the convenience of installation and user experience. better.

During specific implementation, for the convenience of users' reference, when producing the factory roller blind driving device, a corresponding relationship table can be made corresponding to the number of winding turns of the flat scroll spring 44 on the transmission shaft 42 and the length of the curtain fabric 20. Users can refer to the corresponding relationship table. The relationship table pre-tightens the rolling shutter driving device according to the length of the curtain 20 purchased.

In an optional embodiment of the present application, as shown in Figures 1 to 4, the middle of the end face of the spring frame 40 close to the main shaft 3 is also protruding to form a plug-in post 401, and the plug-in post 401 is inserted into the One end of the support bushing 5 close to the spring frame 40 is fixedly connected to the support bushing 5 . In this embodiment, a plug-in post 401 is provided on an end surface of the spring frame 40 close to the main shaft 3 to facilitate the fixed connection between the spring frame 40 and the support bushing 5 and to facilitate assembly. In order to realize the insertion column 401 and the support bushing 5, the screws as shown in Figure 1 can be used for locking, or buckles can be used to achieve connection and fixation.

In an optional embodiment of the present application, as shown in Figures 1-4, the outer end surface of the plug-in post 401 is also recessed with a fixing hole 403 whose central axis coincides with the central axis of the main shaft 3. The plug-in column 401 is also provided with a pivot hole 405 that penetrates the plug-in column 401 in the axial direction at an offset position from the axis. One end of the shaft 341 of the main gear 34 is coaxially fixed with the main shaft 3 and the other end is fixed coaxially with the main shaft 3. Inserted and fixed in the fixing hole 403 , the output end 421 of the transmission shaft 42 is inserted in the pivot hole 405 , and one end of the shaft of the planetary gear 46 is coaxially fixed with the output end 421 . In this embodiment, by providing the fixing hole 403 and the pivot hole 405 on the plug-in column 401, the installation and positioning of the main gear 34 and the transmission shaft 42 are realized correspondingly, which facilitates assembly and simplifies the assembly structure.

In an optional embodiment of the present application, as shown in Figures 1 to 4, the inner hole 52 of the support bushing 5 is in the shape of a stepped hole, including a small diameter section 521 corresponding to the main shaft 3 and a small section 521 corresponding to the main gear. 34 and the large-diameter section 523 of the planet gear 46. The connecting parts of the small-diameter section 521 and the large-diameter section 523 are connected by an annular plate 54 perpendicular to the axial direction of the support bushing 5. The inner wall of the annular plate 54 is A shaft hole 541 is provided at a position corresponding to the shaft of the planetary gear 46 , and the other end of the shaft of the planetary gear 46 is pivotally connected in the shaft hole 541 . In this embodiment, the inner hole 52 of the support bushing 5 adopts a small diameter section 521 and a large diameter section 523 to accommodate the main shaft 3, the main gear 34 and the planetary gears 46. The large diameter section 523 facilitates the assembly of the main gear 34 and the planetary gears 46. , can also protect the transmission structure; in addition, a shaft hole 541 is provided on the inner wall of the annular plate 54, which also facilitates the assembly of the planetary gear 46.

In an optional embodiment of the present application, as shown in FIG. 1 , a flange 56 is formed radially outwardly on one end of the small diameter section 521 away from the large diameter section 523 , and the outer pin hole 50 is provided on the flange. On plate 56. In this embodiment, by providing the flange 56 , the flange 56 can be used to cover the opening at one end of the winding drum 2 to prevent external foreign matter from entering the inside of the winding drum 2 .

In an optional embodiment of the present application, as shown in FIG. 1 , the outer wall of the plug-in post 401 is also symmetrically radially protruded to form a plurality of positioning pins 407 , and correspondingly formed on the inner wall of the large-diameter section 523 There is a slot 525 for the positioning pin 407 to be inserted. In this embodiment, the positioning pin 407 on the outer wall of the insertion post 401 and the slot 525 of the large diameter section 523 are used to insert and match each other, effectively ensuring the fixed connection between the two, inserting positioning, and relatively easy assembly.

In an optional embodiment of the present application, as shown in Figure 1, the outer diameter of the annular plate 54 is larger than the outer diameter of the large diameter section 523, and an edge for connecting with the winding drum is formed on the edge of the annular plate 54. 2 corresponds to the first clamping groove 541 which is relatively fixed in the circumferential direction. In this embodiment, as shown in Figure 1, during specific implementation, the first slot 541 of the annular plate 54 and the protrusion 22 on the inner wall of the winding drum 2 can be used to engage with each other to realize the support bushing 5 and the winding drum. 2 circumferential relative positioning.

In an optional embodiment of the present application, as shown in Figures 1 to 6, the spring driver 4 also includes a core shaft 48 arranged parallel to the transmission shaft 42 and pivoted on the spring frame 40, so The inner end of the flat scroll spring 44 is fixed on the mandrel 48 . In this embodiment, the spring driver 4 is also provided with a mandrel 48, and the inner end of the planar scroll spring 44 is fixed on the mandrel 48 to realize the positioning of the planar scroll spring 44 and facilitate installation.

In an optional embodiment of the present application, as shown in FIGS. 1 to 6 , the spring frame 40 is provided with a plurality of partitions 408 whose plates are perpendicular to the axial direction of the transmission shaft 42 to separate the spring frame 40 It is divided into several assembly grooves 409 distributed side by side along the axial direction of the transmission shaft 42. The planar scroll spring 44 is assembled in at least one assembly groove 409, and the transmission shaft 42 and the core shaft 48 pass through it correspondingly. Each piece of said partition 408. In this embodiment, a plurality of partitions 408 are used to separate the spring frame 40 into a plurality of assembly slots 409. During specific assembly, the flat scroll spring 44 can be flexibly selected to be assembled in the plurality of assembly slots 409, thereby making the drive The device outputs different driving forces; in addition, it is understandable that during design, the number of assembly slots 409 can be reasonably selected to reduce costs and shorten the length of the spring frame 40 .

In specific implementation, as shown in Figure 6, the pivot hole 405 is provided on each partition 408, and the spring frame 40 is also provided with an insertion hole 40a that passes through each partition 408. The core shaft 48 and the The transmission shaft 42 is respectively inserted into the insertion hole 40a and the pivot hole 405 from the end of the insertion hole 40a and the pivot hole 405 away from the support frame 1. The end surface of the spring frame 4 away from the support frame 1 is also fixedly assembled with a The mandrel 48 and the transmission shaft 42 are correspondingly limited to the limiting cover 40b in the insertion hole 40a and the pivot hole 405.

In an optional embodiment of the present application, as shown in FIGS. 1-6 , a second slot 408a is formed at the edge of the partition 408 for corresponding clamping with the winding drum 2 and relatively fixed in the circumferential direction. . In this embodiment, as shown in Figure 1 , during specific implementation, the second slot 408a of the partition 408 and the protrusion 22 on the inner wall of the winding drum 2 can be used to engage with each other, so that the spring frame 4 and the winding drum 2 can be connected to each other. circumferential relative positioning.

In an optional embodiment, as shown in FIG. 5 , the fixed end 30 of the spindle 3 is radially protruded and formed to abut against the flange 56 to limit the insertion of the spindle 3 into the support bushing 5 The limit plate 301 is of a length. The outer surface of the limit plate 301 is also provided with a hook 303 for hooking with the hook hole 10 on the support frame 1. The middle part of the limit plate 72 is also provided with an adjustment hole. , it can be understood that the adjustment part 36 is constituted by the adjustment hole or the limit plate 301, and the user can insert the adjustment hole to rotate the spindle 3 or manually rotate the limit plate 301 with the help of an operating tool, which is easy to operate.

In another optional embodiment, as shown in Figures 1 to 4 and 7, the end surface of the fixed end 30 of the main shaft 3 is provided with a positioning plug for plug-fitting with the positioning plug 12 on the support frame 1. Jack 305, the cross-sections of the positioning jack 305 and the positioning plug 12 are non-circular that are adapted to each other. It can be understood that the positioning jack 305 also constitutes the adjustment part, and the user can also use the operation The tool is inserted into the adjustment hole to rotate the spindle 3, which is easy to operate. In specific implementation, the non-circular shape may be a polygon such as a triangle or a quadrilateral. Of course, the positioning socket 305 and the positioning insert 12 may also be splined holes and splined shafts as shown in Figure 1 or Figure 5 .

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the protection scope of the claims, and these all fall within the protection scope of this application.

Claims

A roller blind driving device used to drive a winding drum whose two ends are respectively pivoted to corresponding support frames and for corresponding winding of curtain fabrics. The driving device includes:

A main shaft arranged coaxially with the winding drum. The main shaft includes a fixed end for being fixed to the support frame and a free end for inserting into the winding drum. The free end is also fixed with a main shaft. gear;

Spring driver, the spring driver includes a spring frame that is relatively fixed to the winding drum in the circumferential direction, a transmission shaft that is pivoted on the spring frame, and a transmission shaft that is assembled on the spring frame and has an outer end fixed to the transmission A planar scroll spring on the shaft, the output end of the transmission shaft is coaxially fixed with a planetary gear meshing with the main gear; and

A support bushing that is sleeved on the outside of the main shaft and fixed relative to the winding drum in the circumferential direction;

It is characterized in that the support bushing is also fixed on the spring frame, the fixed end of the main shaft is also provided with an adjustment part for driving the rotation of the main shaft, and the side wall of the support bushing is provided with a connecting point. There are outer pin holes inside and outside the support bushing, and inner pin holes are correspondingly provided on the outer wall of the main shaft. The main shaft rotates under the driving of the adjusting part until the inner pin hole is aligned with the outer pin hole, and a safety pin is inserted into the outer pin hole. Fixed relative to the support bushing.
The rolling shutter driving device according to claim 1, wherein a plug-in column is protrudingly formed in the middle of the end face of the spring frame close to the main shaft, and the plug-in column is correspondingly inserted into the support bushing and is close to the supporting bushing. One end of the spring frame is fixedly connected to the support bushing.
The rolling shutter driving device according to claim 2, wherein the outer end surface of the plug-in column is also recessed with a fixing hole whose central axis coincides with the central axis of the main shaft. A pivot hole that penetrates the plug-in column in the axial direction is also provided at a position offset from the axis. One end of the shaft of the main gear is coaxially fixed with the main shaft and the other end is inserted and fixed in the fixed hole. The output end of the transmission shaft is inserted into the pivot hole, and one end of the shaft of the planetary gear is coaxially fixed with the output end.
The rolling shutter driving device according to claim 3, wherein the inner hole of the support bushing is in the shape of a stepped hole and includes a small diameter section corresponding to the main shaft and a large diameter section corresponding to the main gear and the planetary gear. The connecting parts of the small diameter section and the large diameter section are connected by an annular plate perpendicular to the axial direction of the support bushing. The inner wall of the annular plate is provided with an axis hole corresponding to the shaft position of the planetary gear, so The other end of the shaft of the planetary gear is correspondingly pivotally connected in the shaft hole.
The rolling shutter driving device according to claim 4, wherein a flange plate is formed radially outwardly on one end of the small diameter section away from the large diameter section, and the outer pin hole is provided on the flange plate.
The rolling shutter driving device according to claim 4, wherein the outer wall of the plug-in column is also symmetrically radially protruded to form a plurality of positioning pins, and the inner wall of the large-diameter section is formed with corresponding holes for each position. Describe the slot into which the positioning latch is inserted.
The roller blind driving device according to claim 4, characterized in that the outer diameter of the annular plate is larger than the outer diameter of the large diameter section, and an edge is formed on the edge of the annular plate for corresponding snapping with the winding drum. The first slot is relatively fixed in the circumferential direction.
The rolling shutter driving device according to claim 1, wherein the spring driver further includes a mandrel arranged parallel to the transmission shaft and pivoted on the spring frame, and the inner part of the planar scroll spring is The end is fixed on the mandrel.
The rolling shutter driving device according to claim 8, characterized in that the spring frame is provided with a plurality of partitions with plates perpendicular to the axial direction of the transmission shaft to separate the spring frame into several partitions along the transmission shaft. There are assembly grooves distributed axially side by side, and the planar scroll spring is assembled in at least one assembly groove, and the transmission shaft and the spindle pass through each of the partitions correspondingly.
The roller blind driving device according to claim 9, characterized in that a second locking groove is formed at the edge of the partition plate for corresponding locking with the winding drum and relatively fixed in the circumferential direction.