CN217783375U

CN217783375U - Roller shutter driving device

Info

Publication number: CN217783375U
Application number: CN202221640479.1U
Authority: CN
Inventors: 雷振邦; 雷兴邦
Original assignee: Dongguan Leifuyi Window Decoration Technology Co ltd
Current assignee: Dongguan Leifuyi Window Decoration Technology Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-11-11
Anticipated expiration: 2032-06-28

Abstract

The embodiment of the utility model provides a roll up curtain drive arrangement for the winding bobbin corotation or the reversal of curtain are rolled up in the drive so that the corresponding receipts of curtain cloth to winding bobbin on receive and release, including driver and drive mechanism, drive mechanism includes: a base shell; the outer side surfaces of the first rope winding drum and the second rope winding drum are respectively and correspondingly provided with a first thread guide groove and a second thread guide groove which extend spirally along the axial direction; a drive cord configured to: when the winding drum rotates forward to wind the curtain cloth on the winding drum, the transmission rope withdraws from the first thread guide groove circle by circle and synchronously winds along the second thread guide groove in sequence, and when the winding drum rotates reversely to wind the curtain cloth from the winding drum, the transmission rope withdraws from the second thread guide groove circle by circle and synchronously winds along the first thread guide groove in sequence. The embodiment can realize the retraction of the curtain cloth with lower cost and stability.

Description

Roller shutter driving device

Technical Field

The embodiment of the utility model provides a relate to curtain accessory technical field, especially relate to a roll up curtain drive arrangement.

Background

The rolling curtain driving device is used for driving the winding drum with two ends respectively pivoted on the corresponding support frames and the outer side surface fixed with the curtain cloth to rotate so as to realize the control of the curtain cloth.

The existing roller shutter driving device comprises a driver arranged in a winding drum, a transmission rod which is fixed on a support frame outside one end of the winding drum and is inserted into the winding drum, and a transmission mechanism for realizing power transmission between the driver and the transmission rod. The driver drives the winding drum to rotate through the transmission mechanism so as to wind the curtain cloth on the winding drum, and accordingly the curtain cloth can be lifted correspondingly, and the window is opened. The traditional transmission mechanism usually adopts transmission structures such as gears, however, the force of the curtain cloth acting on the driver is gradually increased in the curtain cloth ascending process (the curtain cloth is gradually wound by the winding drum), and the force of the curtain cloth acting on the driver is gradually reduced in the curtain cloth descending process (the curtain cloth is gradually unwound by the winding drum).

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem who solves provides a roll up drive arrangement, can save more and low-cost the realization of curtain cloth receive and releases.

In order to solve the technical problem, an embodiment of the utility model provides a following technical scheme: the utility model provides a roll up curtain drive arrangement for the winding drum corotation or the reversal of drive roll up curtain are in order to make the coiling extremely corresponding receive and release of curtain cloth on the winding drum, roll up curtain drive arrangement include driver, both ends respectively with the output of driver with the winding drum corresponds the drive mechanism who connects in order to realize power transmission, drive mechanism includes:

a base shell;

the first rope winding drum and the second rope winding drum are axially parallelly pivoted on the base shell in parallel, the first rope winding drum and the second rope winding drum are conical drums with the outer diameters gradually increasing from one end to the other end along the axial direction, the increasing directions of the outer diameters of the first rope winding drum and the second rope winding drum are opposite, a first thread guide groove and a second thread guide groove which spirally extend along the axial direction are correspondingly arranged on the outer side surfaces of the first rope winding drum and the second rope winding drum respectively, and the first rope winding drum and the second rope winding drum are further correspondingly in transmission connection with the driver and the winding drums respectively; and

the both ends are fixed in respectively the path end of first wire winding section of thick bamboo and the path end of second wire winding section of thick bamboo and follow in proper order the driving rope of first screw thread guide slot and second screw thread guide slot coiling, the driving rope is set up to: when the winding drum rotates forwards to enable the curtain cloth to be wound on the winding drum, the transmission rope withdraws from the first thread guide groove circle by circle and synchronously winds along the second thread guide groove in sequence, and when the winding drum rotates backwards to enable the curtain cloth to be discharged from the winding drum, the transmission rope withdraws from the second thread guide groove circle by circle and synchronously winds along the first thread guide groove in sequence.

Furthermore, the taper of the first rope winding drum is larger than that of the second rope winding drum.

Furthermore, the small-diameter end of the first rope winding drum and the small-diameter end of the second rope winding drum are respectively provided with a fixing part for fixing the end part of the transmission rope.

Furthermore, the driver comprises a driving shell, a winding frame and an output shaft which are pivoted in the driving shell in parallel, and a flat spiral spring, two ends of which are respectively fixed on the winding frame and the output shaft, the first rope winding drum is in transmission connection with the output shaft, and the driving shell is fixedly connected with the base shell.

Furthermore, the rolling curtain driving device is assembled in an inner cavity of the winding drum, the driving shell and the winding drum are relatively fixed in the circumferential direction, the transmission mechanism further comprises a variable transmission case arranged between the second rope winding drum and the winding drum, the variable transmission case comprises a gear box fixed at one end of the base shell, a first transmission shaft and a second transmission shaft which are respectively pivoted in the gear box and respectively extend to the outside of the gear box by one end, and a multi-stage gear transmission pair assembled in the gear box, an input stage gear of the multi-stage gear transmission pair is coaxially fixed with the first transmission shaft, an output stage gear of the multi-stage gear transmission pair is coaxially fixed with the second transmission shaft, through holes for the first transmission shaft and the second transmission shaft to penetrate out are respectively formed in the gear box, the first transmission shaft is in transmission connection with the second rope winding drum, and the second transmission shaft is fixedly connected with a supporting frame of the rolling curtain.

Furthermore, the transmission mechanism further comprises a variable-speed transmission box arranged between the second rope winding drum and the winding drum, the variable-speed transmission box comprises a gear box fixed at one end of the base shell, a first transmission shaft and a second transmission shaft which are respectively pivoted in the gear box and respectively extend out of the gear box from one end, and a multi-stage gear transmission pair assembled in the gear box, an input stage gear of the multi-stage gear transmission pair is coaxially fixed with the first transmission shaft, an output stage gear of the multi-stage gear transmission pair is coaxially fixed with the second transmission shaft, through holes for the first transmission shaft and the second transmission shaft to penetrate through are respectively formed in the gear box, the first transmission shaft is in transmission connection with the second rope winding drum, and the second transmission shaft is in transmission connection with the winding drum.

Furthermore, the transmission mechanism further comprises a single-stage gear transmission pair arranged between the first rope winding drum and the output shaft, the single-stage gear transmission pair comprises a first transmission gear and a second transmission gear which are pivoted on the end face of one end, close to the driver, of the base shell and are meshed with each other, the first transmission gear is coaxially fixed with the output shaft, and the second transmission gear is coaxially fixed with the first rope winding drum.

Furthermore, a jack is arranged at the axis of the end face of the output shaft, and a gear shaft of the first transmission gear is coaxially inserted into the jack.

Further, the base shell includes the main casing body of one end open-ended and cover in end cover on the opening, one side of end cover is equipped with the elasticity bayonet socket, the integrative coaxial shaping of second drive gear is in the end of first rope winding section of thick bamboo, the end of first rope winding section of thick bamboo with still be equipped with the necking down portion between the second drive gear, first rope winding section of thick bamboo is gone into with necking down portion extrusion card the pin joint just on the end cover in the elasticity bayonet socket first rope winding section of thick bamboo with second drive gear is located respectively the inboard and the outside of end cover, first drive gear also the pin joint is located on the end cover lateral surface.

Furthermore, a cover housing which covers the first transmission gear and the second transmission gear correspondingly and is fixedly connected with the base housing and the driving housing is arranged between the base housing and the driving housing, and a through hole for the gear shaft of the first transmission gear to pass through is formed in the cover housing; the two opposite sides of one end, facing the base shell, of the housing are provided with first buckling parts, the two opposite sides of the end part of the base shell are correspondingly provided with second buckling parts, and the first buckling parts and the second buckling parts are buckled with each other.

After the technical scheme is adopted, the embodiment of the utility model provides an at least, following beneficial effect has: the embodiment of the utility model provides a drive mechanism adopts basic shell, first wire winding section of thick bamboo, second wire winding section of thick bamboo and driving rope, and first wire winding section of thick bamboo and second wire winding section of thick bamboo are the external diameter along the axial from one end to the taper cylinder that the other end increases gradually, and the external diameter of first wire winding section of thick bamboo and second wire winding section of thick bamboo increases opposite direction progressively, because the both ends of driving rope are fixed in respectively the path end of first wire winding section of thick bamboo and the path end of second wire winding section of thick bamboo and follow in proper order first screw thread guide slot and second screw thread guide slot are convoluteed, on the one hand, when winding section of thick bamboo corotation makes the curtain cloth be convoluteed to the winding section of thick bamboo, export rotary power by the driver and make curtain cloth roll to the winding section of thick bamboo, at this moment, because the driving rope withdraws from first screw thread guide slot circle by circle and follow in proper order in step the second screw thread guide slot in step, the driving rope acts on the pulling force of second wire winding section of thick bamboo is great, and the pulling force that acts on first wire winding section of thick bamboo is less, thereby can adopt the driver that the torque variation interval of constant torque output is less to drive first wire winding section of thick bamboo, reduce the driver cost; on the other hand, when the winding drum rotates reversely to enable the curtain cloth to be discharged from the winding drum, the curtain cloth is pulled by a user to enable the curtain cloth to be discharged from the winding drum, at the moment, the transmission rope exits from the second thread guide groove circle by circle and is synchronously and sequentially wound along the first thread guide groove, the tensile force of the transmission rope on the first rope winding drum is large, the tensile force of the transmission rope on the second rope winding drum is small, and therefore the user can pull the curtain cloth more conveniently.

Drawings

Fig. 1 is a schematic view of a splitting structure of an optional embodiment of the rolling shutter driving device of the present invention.

Fig. 2 is a schematic view of an assembly structure of an optional embodiment of the rolling shutter driving device of the present invention.

Fig. 3 is a schematic sectional view of the first and second rope drums according to an optional embodiment of the rolling shutter driving device of the present invention.

Fig. 4 is a schematic view of a split structure of a single-stage gear transmission pair of an optional embodiment of the rolling shutter driving device of the present invention.

Fig. 5 is a schematic cross-sectional view of a single-stage gear transmission pair according to an alternative embodiment of the rolling shutter driving device of the present invention.

Fig. 6 is a schematic view of a split structure of a driver according to an optional embodiment of the rolling shutter driving device of the present invention.

Fig. 7 is a schematic sectional view of a driver of an alternative embodiment of the rolling shutter driving device of the present invention.

Fig. 8 is a schematic structural view of the roller blind driving device according to an optional embodiment of the present invention after the base housing is disassembled.

Detailed Description

The present application will now be described in further detail with reference to the accompanying drawings and specific examples. It should be understood that the following illustrative embodiments and description are only for explaining the present invention, and are not to be construed as limiting the present invention, and that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

As shown in fig. 1-3, an optional embodiment of the present invention provides a roller blind driving device, which is used for driving the roller blind to rotate forward or backward around the winding drum 1 so as to wind the cord fabric 10 on the roller drum 1 correspondingly, wherein the roller blind driving device includes a driver 3, and a transmission mechanism 5, both ends of which are respectively connected with the output end of the driver 3 and the roller drum 1 correspondingly to realize power transmission, and the transmission mechanism 5 includes:

a base shell 50;

the first rope winding drum 52 and the second rope winding drum 54 are axially parallelly pivoted on the base shell 50 side by side, the first rope winding drum 52 and the second rope winding drum 54 are both conical drums with gradually increasing outer diameters from one end to the other end along the axial direction, the increasing directions of the outer diameters of the first rope winding drum 52 and the second rope winding drum 54 are opposite, a first thread guide groove 521 and a second thread guide groove 523 which extend spirally along the axial direction are correspondingly arranged on the outer side surfaces of the first rope winding drum 52 and the second rope winding drum 54 respectively, and the first rope winding drum 52 and the second rope winding drum 54 are further correspondingly in transmission connection with the driver 3 and the winding drum 1 respectively; and

a driving rope 56 having both ends fixed to the small diameter end of the first rope winding drum 52 and the small diameter end of the second rope winding drum 54, respectively, and sequentially wound along the first thread guide groove 521 and the second thread guide groove 523, wherein the driving rope 56 is configured to: when the winding drum 1 rotates forward to wind the screen cloth 10 onto the winding drum 1, the driving rope 56 is withdrawn from the first threaded guide groove 521 one by one and wound along the second threaded guide groove 541 in synchronization with one another, and when the winding drum 1 rotates backward to wind the screen cloth 10 from the winding drum 1, the driving rope 56 is withdrawn from the second threaded guide groove 541 one by one and wound along the first threaded guide groove 521 in synchronization with one another.

The embodiment of the present invention provides a transmission mechanism 5, which employs a base shell 50, a first rope winding drum 52, a second rope winding drum 54 and a transmission rope 56, wherein the first rope winding drum 52 and the second rope winding drum 54 are conical drums with outer diameters gradually increasing from one end to the other end along an axial direction, and the increasing directions of the outer diameters of the first rope winding drum 52 and the second rope winding drum 54 are opposite, because two ends of the transmission rope 56 are respectively fixed to a small diameter end of the first rope winding drum 52 and a small diameter end of the second rope winding drum 54 and are wound along the first thread guide groove 521 and the second thread guide groove 541 in sequence, on one hand, when the cord 10 is wound onto the winding drum 1 by the positive rotation of the winding drum 1, the cord 10 is wound onto the winding drum 1 by the driver 3 outputting rotary power, at this time, because the transmission rope 56 is withdrawn from the first thread guide groove 521 loop by loop and is wound along the second thread guide groove 541 in sequence, the tension applied to the second rope winding drum 54 is large, and the transmission rope 52 is applied to the first rope winding drum 52, thereby the torque output by the constant torque driver is reduced, and the torque output of the first rope winding drum 52 is reduced; on the other hand, when the winding drum 1 is rotated reversely to let the fabric 10 out of the winding drum 1, the user pulls the fabric 10 to let the fabric 10 out of the winding drum 1, and at this time, the driving cord 56 is withdrawn from the second thread guide 541 one by one and is synchronously and sequentially wound along the first thread guide 521, and the pulling force of the driving cord 56 on the first winding drum 52 is large, and the pulling force on the second winding drum 54 is small, so that the user can pull the fabric 10 more easily.

In an alternative embodiment of the invention, as shown in fig. 1 and 3, the taper of the first rope drum 52 is greater than the taper of the second rope drum 54. In this embodiment, the taper of the first rope reel 52 is set to be larger than that of the second rope reel 54, the outer diameter of the first rope reel 52 is gradually changed faster than that of the second rope reel 54, and the tension of the driving rope 54 acting on the first rope reel 52 and the second rope reel 54 respectively can be better adapted to the torque output by the driver 3. In practical implementation, the taper of the first winding drum 52 and the taper of the second winding drum 54 can be flexibly set according to the torque force output by the driver 3, so that the user can pull the curtain cloth 10 more easily.

In an alternative embodiment of the present invention, as shown in fig. 1, the small diameter end of the first rope reel 52 and the small diameter end of the second rope reel 54 are further provided with a fixing portion 523 for fixing the end portion of the driving rope 56. In this embodiment, the fixing portion 523 is further provided to facilitate the installation and fixation of the end portion of the transmission rope 56. In specific implementations, the fixing portion 523 can be implemented in many ways, for example: fixing holes, fixing posts, fixing bolts, etc., which are used in the embodiment of fig. 1.

In an alternative embodiment of the present invention, as shown in fig. 1, 6 and 7, the driver 3 includes a driving housing 30, a winding frame 32 and an output shaft 34 pivoted in parallel to each other in the driving housing 30, and a flat spiral spring 36 fixed at both ends to the winding frame 32 and the output shaft 34, respectively, the first rope winding drum 52 is in transmission connection with the output shaft 34, and the driving housing 30 is fixedly connected with the base shell 50. In the embodiment, the driver 3 is composed of the driving shell 30, the winding frame 32, the output shaft 34 and the flat spiral spring 36, the structure is simple, and the flat spiral spring 36 is used for winding between the winding frame 32 and the output shaft 34, so that the rotary power can be effectively output; in addition, the roller shutter driving device is assembled in the inner cavity of the winding drum 1, so that the mounting structure can be effectively simplified, and the occupied volume of the whole roller shutter is reduced.

In an optional embodiment of the present invention, as shown in fig. 1, 4 and 5, the rolling curtain driving device is assembled in an inner cavity of the winding drum 1, the driving housing 30 and the winding drum 1 are relatively fixed in a circumferential direction, the transmission mechanism 5 further includes a speed change transmission case 57 disposed between the second winding drum 54 and the winding drum 4, the speed change transmission case 57 includes a gear box 571 fixed at one end of the base housing 50, a first transmission shaft 573 and a second transmission shaft 575 respectively pivoted in the gear box 571 and respectively extending to the outside of the gear box 571 with one end, and a multi-stage gear transmission pair 577 assembled in the gear box 571, an input stage gear 577a of the multi-stage gear transmission pair 577 is coaxially fixed with the first transmission shaft 573, an output stage gear 577b of the multi-stage gear transmission pair 577 is coaxially fixed with the second transmission shaft 575, a through hole for the first transmission shaft 577 and the second transmission shaft 575 penetrates through is respectively opened on the gear box 571, the first transmission shaft 575 is connected with the second winding drum 54, and the rolling curtain supporting frame 5737 is connected with the second winding drum 5737. In the embodiment, the variable-speed transmission case 57 is arranged between the second rope winding drum 54 and the winding drum 4, and the multi-stage gear transmission pair 577 of the variable-speed transmission case 57 is used for realizing power transmission, so that the transmission structure is relatively simple, and the transmission ratio can be flexibly designed by reasonably selecting different gear types; in addition, in the scheme that the roller blind driving device is arranged in the inner cavity of the winding drum 1, the first transmission shaft 573 is in transmission connection with the second rope winding drum 54, the second transmission shaft 575 is fixedly connected with the supporting frame 7 of the roller blind, during specific transmission, the second transmission shaft 575 and the output-stage gear 577b are relatively fixed, and structures such as the winding drum 1 rotate relative to the second transmission shaft 575, so that power transmission can be effectively realized. In practice, the gear box 571 is further assembled by two half-shells for easy assembly.

In an optional embodiment of the present invention, the transmission mechanism 5 further includes a transmission case 57 disposed between the second rope reel 54 and the winding reel 4, the transmission case 57 includes a gear case 571 fixed at one end of the base shell 50, a first transmission shaft 573 and a second transmission shaft 575 respectively pivoted in the gear case 571 and respectively extending to the outside of the gear case 571 at one end, and a multi-stage gear pair 577 assembled in the gear case 571, an input stage gear 577a of the multi-stage gear pair 577 is coaxially fixed with the first transmission shaft 573, an output stage gear 577b of the multi-stage gear pair 577 is coaxially fixed with the second transmission shaft 575, the gear case 571 is respectively provided with through holes 571a through which the first transmission shaft 573 and the second transmission shaft 575 penetrate, the first transmission shaft 573 is in transmission connection with the second rope reel 54, and the second transmission shaft 575 is in transmission connection with the winding reel 1. In this embodiment, in the scheme that the rolling curtain driving device is externally disposed outside the winding drum 1, the first transmission shaft 573 is in transmission connection with the second rope winding drum 54, and the second transmission shaft 575 is in transmission connection with the winding drum 1, so that power transmission can be effectively realized.

In an optional embodiment of the present invention, as shown in fig. 3, fig. 7 and fig. 8, the transmission mechanism 5 further includes a single-stage gear transmission pair 58 disposed between the first rope winding drum 52 and the output shaft 34, the single-stage gear transmission pair 58 includes a first transmission gear 581 and a second transmission gear 583 which are both pivoted on an end face of the base shell 50 close to the driver 3 and are engaged with each other, the first transmission gear 581 is coaxially fixed with the output shaft 34, and the second transmission gear 583 is coaxially fixed with the first rope winding drum 52. In this embodiment, the single-stage gear transmission pair 58 composed of the first transmission gear 581 and the second transmission gear 583 can effectively realize the power between the first rope winding drum 52 and the second transmission shaft 34, and flexibly adjust the transmission ratio.

In an alternative embodiment of the present invention, as shown in fig. 7, a plug hole 341 is disposed at the axial center of the end surface of the output shaft 34, and the gear shaft 581a of the first transmission gear 581 is coaxially inserted into the plug hole 341. In this embodiment, the output shaft 34 and the first transmission gear 581 are coaxially inserted into the insertion hole 341 in the center of the rod 4 of the second transmission shaft 3 by using the gear shaft 581a of the first transmission gear 581, so that the transmission matching between the second transmission shaft 34 and the first transmission gear 581 is effectively realized, the assembly is also convenient, and the space is saved.

In an optional embodiment of the present invention, as shown in fig. 8, the base shell 50 includes a main shell 501 having an opening 501a at one end and an end cover 503 covering the opening 501a, one side of the end cover 503 is provided with an elastic bayonet 503a, the second transmission gear 583 is integrally and coaxially formed at the end of the first rope winding drum 52, a necking portion 525 is further provided between the end of the first rope winding drum 52 and the second transmission gear 583, the first rope winding drum 52 is pressed and clamped into the elastic bayonet 503a by the necking portion 525 and is pivoted on the end cover 503, the first rope winding drum 52 and the second transmission gear 583 are respectively located at the inner side and the outer side of the end cover 503, and the first transmission gear 581 is also pivoted on the outer side of the end cover 503. In this embodiment, the first rope winding drum 52 is pressed and clamped into the elastic bayonet 503a by the necking portion 525 to pivotally connect the second transmission gear 583 to the outer side surface of the end cap 503, and the base shell 50 correspondingly adopts the main shell 501 and the end cap 503, thereby facilitating assembly.

In an alternative embodiment of the present invention, as shown in fig. 8, a cover 585 for covering the first transmission gear 581 and the second transmission gear 583 and fixedly connecting the base shell 50 and the driving shell 30 is further disposed between the base shell 50 and the driving shell 30, and a through hole 585a for passing the gear shaft 581a of the first transmission gear 581 is disposed on the cover 585; the housing 585 is provided with first buckle 585b towards the relative both sides of the one end of base shell 50, the relative both sides of the tip of base shell 50 correspond and are provided with second buckle 50a, first buckle 585b and second buckle 50a lock each other. In this embodiment, the first transmission gear 581 and the second transmission gear 583 in the housing 585 are further effectively protected, so that the overall spatial layout is optimized; and the first fastening part 585b and the second fastening part 50a are fastened with each other, so that the base shell 50 and the housing 585 can be connected and fixed quickly, and the assembly and disassembly are relatively convenient. In specific implementation, the first fastening portion 585b may be a fastening block, or a fastening piece having a fastening hole for fastening the fastening block; of course, the second locking portion 50a may be a locking block, and the first locking portion 585b may be a locking piece having a locking hole into which the locking block is locked.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the scope of the present invention, and these forms are all within the protection scope of the present invention.

Claims

1. The utility model provides a roll up curtain drive arrangement for the winding drum corotation or the reversal of drive roll curtain so that convolute to the corresponding receipts and releases of curtain cloth on the winding drum, roll up curtain drive arrangement include driver, both ends respectively with the output of driver with the winding drum corresponds the drive mechanism who connects in order to realize power transmission, its characterized in that, drive mechanism includes:

a base shell;

a driving rope having both ends fixed to the small diameter end of the first rope winding drum and the small diameter end of the second rope winding drum respectively and sequentially wound along the first thread guide groove and the second thread guide groove, the driving rope being configured to: when the winding drum rotates forwards to enable the curtain cloth to be wound on the winding drum, the transmission rope withdraws from the first thread guide groove circle by circle and synchronously winds along the second thread guide groove in sequence, and when the winding drum rotates backwards to enable the curtain cloth to be discharged from the winding drum, the transmission rope withdraws from the second thread guide groove circle by circle and synchronously winds along the first thread guide groove in sequence.

2. Roller blind drive as claimed in claim 1, characterized in that the taper of the first rope drum is greater than the taper of the second rope drum.

3. The blind driving apparatus according to claim 1, wherein the small diameter end of the first winding drum and the small diameter end of the second winding drum are further provided with fixing portions for fixing the ends of the driving cord, respectively.

4. The rolling shutter driving device according to claim 1, wherein the driver includes a driving housing, a winding frame and an output shaft pivotally disposed in parallel with each other in the driving housing, and a flat spiral spring having two ends fixed to the winding frame and the output shaft, respectively, the first winding drum is in transmission connection with the output shaft, and the driving housing is fixedly connected with the base housing.

5. The rolling blind driving apparatus according to claim 4, wherein the rolling blind driving apparatus is assembled in an inner cavity of the winding drum, the driving housing and the winding drum are relatively fixed in a circumferential direction, the transmission mechanism further includes a speed-changing transmission box disposed between the second rope winding drum and the winding drum, the speed-changing transmission box includes a gear box fixed at one end of the base housing, a first transmission shaft and a second transmission shaft respectively pivoted in the gear box and respectively extending to an outside of the gear box with one end, and a multi-stage gear transmission pair assembled in the gear box, an input stage gear of the multi-stage gear transmission pair is coaxially fixed with the first transmission shaft, an output stage gear of the multi-stage gear transmission pair is coaxially fixed with the second transmission shaft, the gear box is respectively provided with a through hole for the first transmission shaft and the second transmission shaft to penetrate through, the first transmission shaft is connected with the second rope winding drum in a transmission manner, and the second transmission shaft is fixedly connected with a supporting frame of the rolling blind.

6. The rolling shutter driving device according to claim 1 or 4, wherein the transmission mechanism further includes a speed-changing transmission case disposed between the second rope winding drum and the winding drum, the speed-changing transmission case includes a gear box fixed at one end of the base housing, a first transmission shaft and a second transmission shaft respectively pivoted in the gear box and respectively extending to the outside of the gear box with one end, and a multi-stage gear transmission pair assembled in the gear box, an input stage gear of the multi-stage gear transmission pair is coaxially fixed with the first transmission shaft, an output stage gear of the multi-stage gear transmission pair is coaxially fixed with the second transmission shaft, the gear box is respectively provided with through holes for the first transmission shaft and the second transmission shaft to pass through, the first transmission shaft is in transmission connection with the second rope winding drum, and the second transmission shaft is in transmission connection with the winding drum.

7. The rolling shutter driving device according to claim 4, wherein the transmission mechanism further comprises a single-stage gear transmission pair disposed between the first rope winding drum and the output shaft, the single-stage gear transmission pair includes a first transmission gear and a second transmission gear, both of which are pivotally disposed on an end surface of the base shell near the driver and are engaged with each other, the first transmission gear is coaxially fixed with the output shaft, and the second transmission gear is coaxially fixed with the first rope winding drum.

8. The roll screen driving apparatus as claimed in claim 7, wherein the end surface of the output shaft is provided with a socket at the axial center, and the gear shaft of the first transmission gear is coaxially inserted into the socket.

9. The rolling shutter driving device according to claim 7, wherein the base housing includes a main housing with an opening at one end and an end cover covering the opening, an elastic bayonet is provided at one side of the end cover, the second transmission gear is integrally and coaxially formed at the end of the first rope winding drum, a necking portion is further provided between the end of the first rope winding drum and the second transmission gear, the first rope winding drum is clamped into the elastic bayonet by squeezing the necking portion and is pivoted to the end cover, the first rope winding drum and the second transmission gear are respectively located at the inner side and the outer side of the end cover, and the first transmission gear is also pivoted to the outer side of the end cover.

10. The rolling screen driving device according to claim 7 or 9, wherein a cover is further provided between the base housing and the driving housing for covering the first transmission gear and the second transmission gear and fixedly connecting the base housing and the driving housing, and the cover is provided with a through hole for passing a gear shaft of the first transmission gear; the two opposite sides of one end, facing the base shell, of the housing are provided with first buckling parts, the two opposite sides of the end part of the base shell are correspondingly provided with second buckling parts, and the first buckling parts and the second buckling parts are buckled with each other.