CN114934742A - Roller shutter driving device - Google Patents

Abstract

The embodiment of the present invention provides a roller blind driving device, which is used to drive the winding drum of the roller blind to rotate forwardly or reversely to make the curtains wound on the winding drum correspondingly retractable, including a driver and a transmission mechanism, and the transmission mechanism includes : base shell; the first and second rope drums, the first and second rope drums are both cones whose outer diameters gradually increase in the axial direction and their outer diameters increase in opposite directions. A first thread guide groove and a second thread guide groove extending helically along the axial direction are respectively provided on the outer sides of the first rope winding drum and the second rope winding drum; So that when the cord fabric is wound onto the winding drum, the drive rope is withdrawn from the first thread guide groove one by one, and is synchronously wound along the second thread guide slot in sequence. When the drum is paid out, the transmission rope is withdrawn from the second thread guide groove turn by turn and synchronously and sequentially wound along the first thread guide groove. This embodiment can realize the retracting and unwinding of the curtain fabric at a lower cost and stably.

Description

Roller shutter drive

technical field

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

Background technique

The roller blind driving device is used to drive the winding drum whose two ends are respectively pivoted on the corresponding support frame and the outer side of which is fixed with the curtain cloth to rotate to realize the control of the curtain cloth.

An existing roller blind driving device includes a driver arranged in the winding drum, a transmission rod fixed on the outer side of one end of the winding drum and inserted into the winding drum, and a transmission rod between the driver and the transmission rod. Transmission mechanism for power transmission. The driver drives the winding drum to rotate through the transmission mechanism to wind the curtain fabric onto the winding drum, so that the curtain fabric can be lifted correspondingly, so that the window is opened. The traditional transmission mechanism usually adopts a transmission structure such as gears. However, in the process of the curtain fabric rising (winding drum gradually rewinds the curtain fabric), the force of the curtain fabric acting on the driver gradually increases, and when the curtain fabric descends (the winding drum gradually unwinding) When the curtain cloth is used, the force of the curtain cloth acting on the driver gradually decreases. Therefore, a driver whose torque can also change synchronously is required to effectively maintain the normal rise and fall of the curtain cloth, and the cost of the variable torque driver is relatively high.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present invention is to provide a roller blind driving device, which can realize the retracting and unwinding of the blind fabric in a more labor-saving and low-cost manner.

In order to solve the above-mentioned technical problems, the embodiments of the present invention provide the following technical solutions: a roller blind driving device, which is used to drive the winding drum of the roller blind to rotate forward or reversely so that the curtains wound on the winding drum are correspondingly For retracting and unfolding, the roller blind driving device includes a driver, a transmission mechanism whose two ends are respectively connected with the output end of the driver and the winding drum to realize power transmission, and the transmission mechanism includes:

base shell;

The first rope reel and the second rope reel are pivoted side by side on the base shell in parallel in the axial direction. One end of the cone is gradually increasing, and the outer diameters of the first and second rope drums have opposite directions of increasing. The outer sides of the first and second rope drums are respectively provided a first thread guide groove and a second thread guide groove extending helically in the axial direction, the first rope reel and the second rope reel are respectively connected with the driver and the reel in a corresponding driving manner; and

The two ends are respectively fixed on the small diameter end of the first rope winding drum and the small diameter end of the second rope winding drum and are wound along the first thread guide groove and the second thread guide groove in sequence, so The transmission rope is set so that: when the winding drum is rotating forward to make the cord to be wound on the winding drum, the transmission rope is withdrawn from the first thread guide groove one by one and synchronously and sequentially along the winding drum. The second thread guide groove is wound, and when the winding drum is reversed so that the cord is paid out from the winding drum, the drive rope is withdrawn from the second thread guide groove turn by turn and synchronously winding along the first thread guide groove in sequence.

Further, the taper of the first rope reel is greater than the taper of the second rope reel.

Further, 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 fixing parts for fixing the ends of the transmission ropes.

Further, the driver includes a drive casing, a winding frame and an output shaft pivoted in the drive casing in parallel to each other, and a plane scroll with both ends respectively fixed on the winding frame and the output shaft. a spring, the first rope reel is in driving connection with the output shaft, and the drive casing is fixedly connected with the base casing.

Further, the roller blind driving device is assembled in the inner cavity of the winding drum, the drive housing and the winding drum are relatively fixed in the circumferential direction, and the transmission mechanism further comprises a A speed change transmission box between the two rope reels and the winding drum, the speed change transmission box includes a gear box fixed at one end of the base shell, pivoted in the gear box and respectively extending to the other end with one end. The first transmission shaft and the second transmission shaft outside the gearbox and the multi-stage gear transmission pair assembled in the gearbox, the input stage gear of the multi-stage gear transmission pair is coaxially fixed with the first transmission shaft , the output stage gear of the multi-stage gear transmission pair is coaxially fixed with the second transmission shaft, and the gear box is respectively provided with perforations for the first transmission shaft and the second transmission shaft to pass through, The first transmission shaft is in driving connection with the second roping drum, and the second transmission shaft is fixedly connected with the support frame of the roller blind.

Further, the transmission mechanism further includes a speed change transmission box arranged between the second rope reel and the winding drum, the speed change transmission box includes a gear box fixed on one end of the base shell, pivoting respectively. The first transmission shaft and the second transmission shaft, which are arranged in the gear box and respectively extend out of the gear box at one end, and a multi-stage gear transmission pair assembled in the gear box, the multi-stage gear transmission pair The input stage gear is fixed coaxially with the first transmission shaft, and the output stage gear of the multi-stage gear transmission pair is coaxially fixed with the second transmission shaft. The transmission shaft and the second transmission shaft pass through the through hole, the first transmission shaft is drivingly connected with the second rope drum, and the second transmission shaft is drivingly connected with the winding drum.

Further, the transmission mechanism further includes a single-stage gear transmission pair arranged between the first rope reel and the output shaft, and the single-stage gear transmission pair includes a pair of gears that are both pivoted on the base shell and close to the A first transmission gear and a second transmission gear meshing with each other on one end face of the driver, the first transmission gear and the output shaft are fixed coaxially, and the second transmission gear is coaxial with the first rope reel Axle is fixed.

Further, an end face of the output shaft is provided with an insertion hole at the shaft center, and the gear shaft of the first transmission gear is coaxially inserted into the insertion hole.

Further, the base shell includes a main casing with an opening at one end and an end cover covering the opening, one side of the end cover is provided with an elastic bayonet, and the second transmission gear is integrally formed coaxially at the end cover. The end of the first rope reel is also provided with a necking portion between the end of the first rope reel and the second transmission gear, and the first rope reel is squeezed and clamped by the necking portion. The elastic bayonet is pivoted on the end cover, the first rope reel and the second transmission gear are located on the inner side and the outer side of the end cover, respectively, and the first transmission gear is also pivoted on the end cover. on the outside of the cover.

Further, a corresponding cover covering the first transmission gear and the second transmission gear and fixedly connecting the base casing and the driving casing is also provided between the base casing and the driving casing. The casing is provided with a through hole for the gear shaft of the first transmission gear to pass through; the opposite sides of the end of the casing facing the base casing are provided with first snap parts, and the opposite ends of the end of the base casing are provided with first snap parts. The two sides are correspondingly provided with second buckle parts, and the first buckle parts and the second buckle parts are mutually buckled.

After the above technical solution is adopted, the embodiment of the present invention has at least the following beneficial effects: the transmission mechanism of the embodiment of the present invention adopts a base shell, a first rope reel, a second rope reel and a transmission rope, and the first rope reel and the second reel The rope drums are all cones whose outer diameters gradually increase from one end to the other in the axial direction, and the outer diameters of the first and second rope drums are in opposite directions. The small diameter end of the first rope reel and the small diameter end of the second rope reel are wound along the first thread guide groove and the second thread guide groove in sequence. When the cord is wound up on the winding drum by the forward rotation, the rotary power is output by the driver to make the cord fabric wind up to the winding drum. winding along the second thread guide groove in sequence, the pulling force of the transmission rope acting on the second rope reel is relatively large, while the pulling force acting on the first rope reel is relatively small, so that a constant torque output or output can be used. A driver with a smaller torque variation interval drives the first rope reel, reducing the cost of the driver; on the other hand, when the reel is reversed to make the cord unwind from the reel, the user pulls the cord to make the cord reel. The curtain fabric is released from the winding drum. At this time, the transmission rope is withdrawn from the second thread guide groove one by one and wound along the first thread guide groove synchronously and sequentially. larger, and the pulling force acting on the second rope reel is smaller, so that the user is more labor-saving when pulling the cord fabric.

Description of drawings

FIG. 1 is a schematic diagram of a split structure of an optional embodiment of the roller shutter driving device of the present invention.

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

3 is a schematic cross-sectional structural diagram of a first rope reel and a second rope reel of an optional embodiment of the roller blind driving device of the present invention.

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

FIG. 5 is a schematic cross-sectional structural diagram of a single-stage gear transmission pair according to an optional embodiment of the roller shutter driving device of the present invention.

FIG. 6 is a schematic diagram of the split structure of the driver of an optional embodiment of the rolling shutter driving device of the present invention.

FIG. 7 is a schematic cross-sectional structural diagram of a driver of an optional embodiment of the roller shutter driving device of the present invention.

FIG. 8 is a schematic structural diagram of an optional embodiment of the rolling shutter driving device of the present invention after the base shell is disassembled.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention, but not to limit the present invention, and, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other .

As shown in FIG. 1-FIG. 3, an optional embodiment of the present invention provides a roller blind driving device, which is used to drive the winding drum 1 of the roller blind to rotate forward or reversely, so that the winding drum 1 is wound to the winding drum 1. The curtains 10 on the roller blind are correspondingly retracted, and the roller blind driving device includes a driver 3, a transmission mechanism 5 whose two ends are respectively connected with the output end of the driver 3 and the winding drum 1 to realize power transmission. Institution 5 includes:

base shell 50;

The first rope reel 52 and the second rope reel 54 are pivoted side by side on the base shell 50 in parallel in the axial direction. To the cone that gradually increases from one end to the other end, and the outer diameters of the first rope drum 52 and the second rope drum 54 increase in opposite directions, the first rope drum 52 and the second rope. The outer surface of the drum 54 is respectively provided with a first thread guide groove 521 and a second thread guide groove 523 which extend along the axial direction. 3 and the winding drum 1 corresponding to the transmission connection; and

The two ends are respectively fixed to the small diameter end of the first rope reel 52 and the small diameter end of the second rope reel 54 and are wound along the first thread guide groove 521 and the second thread guide groove 523 in sequence. The transmission rope 56 is arranged such that when the winding drum 1 is rotated forward so that the cord 10 is wound on the winding drum 1, the driving rope 56 is removed from the first thread The guide grooves 521 are withdrawn one by one and are wound along the second thread guide grooves 541 synchronously and sequentially. The rope 56 is withdrawn from the second thread guide groove 541 one by one and wound along the first thread guide groove 521 synchronously and sequentially.

The transmission mechanism 5 of the embodiment of the present invention adopts a base shell 50 , a first rope winding drum 52 , a second rope winding drum 54 and a transmission rope 56 . The cone is gradually increasing from one end to the other end, and the outer diameters of the first rope reel 52 and the second rope reel 54 increase in opposite directions. Since the two ends of the transmission rope 56 are respectively fixed to the first rope The small diameter end of the drum 52 and the small diameter end of the second rope drum 54 are wound along the first thread guide groove 521 and the second thread guide groove 541 in sequence. When the cord 10 is wound onto the winding drum 1, the driver 3 outputs rotational power to make the cord 10 rewind to the winding drum 1. At this time, the drive rope 56 is driven from the first thread guide groove 521 Exiting one by one and winding along the second thread guide groove 541 synchronously and sequentially, the pulling force of the transmission rope 56 acting on the second rope winding drum 54 is relatively large, while the pulling force acting on the first rope winding drum 52 is relatively small. Therefore, the driver 3 with a constant torque output or with a small output torque variation interval can be used to drive the first rope reel 52, thereby reducing the cost of the driver 3; When being released from the winding drum 1, the user pulls the curtain fabric 10 to release the curtain fabric 10 from the winding drum 1. At this time, the transmission rope 56 is withdrawn from the second thread guide groove 541 one by one and synchronously and sequentially along the When the first thread guide groove 521 is wound, the pulling force of the driving rope 56 acting on the first rope winding drum 52 is relatively large, while the pulling force acting on the second rope winding drum 54 is relatively small, so that the user can pull the curtain fabric 10 more easily. Effortless.

In an optional embodiment of the present invention, as shown in FIG. 1 and FIG. 3 , the taper of the first rope reel 52 is greater than the taper of the second rope reel 54 . In this embodiment, the taper of the first rope reel 52 is set to be greater than the taper of the second rope reel 54, the outer diameter of the first rope reel 52 is gradually changed faster than the second rope reel 54, and the transmission rope The pulling force 54 acting on the first rope reel 52 and the second rope reel 54 respectively can better match the torsion force output by the driver 3 . In a specific implementation, the taper of the first rope reel 52 and the second rope reel 54 can be flexibly set according to the torque output by the driver 3 , so that the user can save more effort when pulling the cord fabric 10 .

In an optional embodiment of the present invention, as shown in FIG. 1 , the small diameter end of the first rope winding drum 52 and the small diameter end of the second rope winding drum 54 are respectively provided with a device for fixing the transmission rope 56 . Fixed part 523 at the end. In this embodiment, the fixing portion 523 is also provided to facilitate the installation and fixing of the end of the transmission rope 56 . During specific implementation, there are many implementations of the fixing portion 523 , such as fixing holes, fixing posts, fixing pins, etc. In the embodiment of FIG. 1 , fixing holes are used.

In an optional embodiment of the present invention, as shown in FIG. 1 , FIG. 6 and FIG. 7 , the driver 3 includes a drive housing 30 , and a winding frame 32 pivoted in the drive housing 30 in parallel to each other. and the output shaft 34 and the flat scroll spring 36 whose two ends are respectively fixed on the winding frame 32 and the output shaft 34, the first bobbin 52 is connected with the output shaft 34 in a transmission, and the driving The casing 30 is fixedly connected to the base casing 50 . In this embodiment, the driver 3 is composed of a drive housing 30 , a winding frame 32 , an output shaft 34 and a flat scroll spring 36 , and the structure is simple. Winding can effectively output rotational power; in addition, assembling the roller blind drive device in the inner cavity of the winding drum 1 can effectively simplify the installation structure and reduce the occupied volume of the overall roller blind.

In an optional embodiment of the present invention, as shown in FIG. 1 , FIG. 4 and FIG. 5 , the roller blind driving device is assembled in the inner cavity of the winding drum 1 , and the driving housing 30 is connected to the The winding drum 1 is relatively fixed in the circumferential direction, and the transmission mechanism 5 further includes a variable speed transmission box 57 arranged between the second rope winding drum 54 and the winding drum 4 , and the variable speed transmission box 57 includes A gear box 571 fixed to one end of the base shell 50, a first transmission shaft 573 and a second transmission shaft 575 respectively pivoted in the gear box 571 and extending out of the gear box 571 at one end, and assembled in the gear box 571. The multi-stage gear transmission pair 577 in the gear box 571, the input stage gear 577a of the multi-stage gear transmission pair 577 is fixed coaxially with the first transmission shaft 573, and the output stage of the multi-stage gear transmission pair 577 The gear 577b is fixed coaxially with the second transmission shaft 575, and the gear box 571 is respectively provided with through holes 571a for the first transmission shaft 573 and the second transmission shaft 575 to pass through. The shaft 573 is drivingly connected with the second rope reel 54, and the second driving shaft 575 is fixedly connected with the support frame 7 of the roller blind. In this embodiment, a variable speed transmission box 57 is also arranged between the second rope reel 54 and the winding drum 4, and the multi-stage gear transmission pair 577 of the variable speed transmission box 57 is used to realize power transmission. The transmission structure is relatively simple, and through reasonable The choice of different gear types can flexibly design the transmission ratio; moreover, in the solution of the roller blind drive device built into the inner cavity of the winding drum 1, the first transmission shaft 573 is drive-connected with the second rope winding drum 54 , the second transmission shaft 575 is fixedly connected with the support frame 7 of the roller blind. During the specific transmission, the second transmission shaft 575 and the output stage gear 577b are relatively fixed, while the winding drum 1 and other structures are relatively fixed relative to the second transmission. The rotation of the shaft 575 can effectively realize power transmission. During specific implementation, for the convenience of assembly, the gear box 571 is assembled from two half-shells.

In an optional embodiment of the present invention, the transmission mechanism 5 further includes a speed change transmission box 57 disposed between the second rope reel 54 and the winding drum 4, and the speed change transmission box 57 includes a fixed The gear box 571 at one end of the base shell 50, the first transmission shaft 573 and the second transmission shaft 575 respectively pivoted in the gear box 571 and extending out of the gear box 571 at one end, and assembled in the gear box 571. The multi-stage gear transmission pair 577 in the gear box 571, the input stage gear 577a of the multi-stage gear transmission pair 577 is fixed coaxially with the first transmission shaft 573, and the output stage gear of the multi-stage gear transmission pair 577 577b is fixed coaxially with the second transmission shaft 575. The gear box 571 is respectively provided with through holes 571a for the first transmission shaft 573 and the second transmission shaft 575 to pass through. 573 is drivingly connected with the second rope reel 54 , and the second transmission shaft 575 is drivingly connected with the winding drum 1 . In this embodiment, in the solution in which the roller blind driving device is externally placed outside the winding drum 1, the first transmission shaft 573 is drivingly connected to the second rope winding drum 54, and the second transmission shaft 575 is connected to the winding drum 54. The cylinder 1 is connected by transmission, which can effectively realize the power transmission.

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 disposed between the first rope reel 52 and the output shaft 34 A gear transmission pair 58, the single-stage gear transmission pair 58 includes a first transmission gear 581 and a second transmission gear 583 that are both pivoted on one end face of the base shell 50 close to the driver 3 and mesh with each other. The first transmission gear 581 is fixed coaxially with the output shaft 34 , and the second transmission gear 583 is fixed coaxially with the first rope reel 52 . In this embodiment, the single-stage gear transmission pair 58 is also composed of the first transmission gear 581 and the second transmission gear 583, which can effectively realize the power between the first rope reel 52 and the second transmission shaft 34, and is flexible and flexible. Adjust the transmission ratio.

In an optional embodiment of the present invention, as shown in FIG. 7 , the end face of the output shaft 34 is provided with a socket 341 at the shaft center, and the gear shaft 581a of the first transmission gear 581 is coaxially inserted into the shaft. inside the socket 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 to effectively The transmission cooperation between the second transmission shaft 34 and the first transmission gear 581 is 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 case 50 includes a main casing 501 with an opening 501a at one end and an end cover 503 covering the opening 501a. There is an elastic bayonet 503a on the side, the second transmission gear 583 is integrally formed at the end of the first rope reel 52, the end of the first rope reel 52 and the second transmission gear 583 There is also a necking portion 525 between the necks 525 and the first rope reel 52 is squeezed into the elastic bayonet 503a by the necking portion 525 to be pivotally connected to the end cover 503 and the first rope reel 52 and the second transmission gear 583 are located on the inner side and the outer side of the end cover 503 respectively, and the first transmission gear 581 is also pivoted on the outer side of the end cover 503 . In this embodiment, the second transmission gear 583 is pivotally connected to the outer side of the end cover 503 by using the first rope reel 52 to squeeze the necked portion 525 into the elastic bayonet 503a, and the base shell 50 corresponds to the main casing 501 and the end cover 503, which is convenient for assembly.

In an optional embodiment of the present invention, as shown in FIG. 8 , a corresponding cover is further provided between the base casing 50 and the drive casing 30 to cover the first transmission gear 581 and the second transmission gear 583 And fixedly connect the base case 50 and the cover case 585 of the drive case 30, the cover case 585 is provided with a through hole 585a for the gear shaft 581a of the first transmission gear 581 to pass through; the cover case 585 The opposite sides facing the end of the base shell 50 are provided with first snap portions 585b, and the opposite sides of the end portion of the base shell 50 are provided with second snap portions 50a correspondingly. The two locking portions 50a are locked with each other. In this embodiment, the first transmission gear 581 and the second transmission gear 583 inside are effectively protected by the cover 585, and the overall spatial layout is optimized; In combination, the connection and fixation of the base case 50 and the cover case 585 can be quickly realized, and the disassembly and assembly are relatively convenient. In specific implementation, the first snap portion 585b can be a snap block, and a snap piece with a snap hole for the snap block can be used; of course, the second snap portion 50a can also be a snap block, the first snap portion The 585b uses a clasp with a snap hole for the snap block to snap into.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the scope of protection of the spirit of the present invention and the claims, many forms can be made, which all fall within the protection scope of the present invention.

Claims (10)

1. A roller blind driving device, which is used to drive the reel of the roller blind to rotate forwardly or reversely to make the curtains wound on the reel correspondingly retractable, the roller blind driving device comprises a driver, two The transmission mechanism is respectively connected with the output end of the driver and the winding drum to realize power transmission. The transmission mechanism includes: base shell; The first rope reel and the second rope reel are pivoted side by side on the base shell in parallel in the axial direction. One end of the cone is gradually increasing, and the outer diameters of the first and second rope drums have opposite directions of increasing. The outer sides of the first and second rope drums are respectively provided a first thread guide groove and a second thread guide groove extending helically in the axial direction, the first rope reel and the second rope reel are respectively connected with the driver and the reel in a corresponding driving manner; and The two ends are respectively fixed on the small diameter end of the first rope winding drum and the small diameter end of the second rope winding drum and are wound along the first thread guide groove and the second thread guide groove in sequence, so The transmission rope is set so that: when the winding drum is rotating forward to make the cord to be wound on the winding drum, the transmission rope is withdrawn from the first thread guide groove one by one and synchronously and sequentially along the winding drum. The second thread guide groove is wound, and when the winding drum is reversed so that the cord is paid out from the winding drum, the drive rope is withdrawn from the second thread guide groove turn by turn and synchronously winding along the first thread guide groove in sequence. 2 . The roller blind driving device according to claim 1 , wherein the taper of the first rope reel is greater than the taper of the second rope reel. 3 . 3 . The roller blind driving device according to claim 1 , wherein the small diameter end of the first rope reel and the small diameter end of the second rope reel are respectively provided with ends for fixing the transmission rope. 4 . fixed part of the part. 4. The roller shutter driving device according to claim 1, wherein the driver comprises a driving housing, a winding frame and an output shaft pivoted in the driving housing parallel to each other, and two ends are respectively fixed on The winding frame and the flat scroll spring on the output shaft, the first rope reel is in driving connection with the output shaft, and the drive casing is fixedly connected with the base casing. 5 . The roller blind driving device according to claim 4 , wherein the roller blind driving device is assembled in the inner cavity of the winding drum, and the driving housing and the winding drum are in the circumferential direction. 6 . Relatively fixed, the transmission mechanism further includes a speed change transmission box arranged between the second rope reel and the winding drum, and the speed change transmission box includes a gear box fixed on one end of the base shell, respectively. A first transmission shaft and a second transmission shaft pivoted in the gear box and extending out of the gear box with one end respectively, and a multi-stage gear transmission pair assembled in the gear box, the multi-stage gear transmission The input stage gear of the pair is coaxially fixed with the first transmission shaft, and the output stage gear of the multi-stage gear transmission pair is coaxially fixed with the second transmission shaft. A transmission shaft and a through hole pierced by the second transmission shaft, the first transmission shaft is drivingly connected with the second rope reel, and the second transmission shaft is fixedly connected with the support frame of the roller blind. 6. The roller blind driving device according to claim 1 or 4, wherein the transmission mechanism further comprises a speed change transmission box arranged between the second rope reel and the reel, the The gear box includes a gear box fixed at one end of the base shell, a first transmission shaft and a second transmission shaft respectively pivoted in the gear box and extending out of the gear box at one end, and assembled in the gear box. A multi-stage gear transmission pair in the gearbox, the input stage gear of the multi-stage gear transmission pair is fixed coaxially with the first transmission shaft, and the output stage gear of the multi-stage gear transmission pair is fixed with the second transmission shaft coaxially fixed, the gear box is respectively provided with perforations for the first transmission shaft and the second transmission shaft to pass through, the first transmission shaft is drivingly connected with the second rope reel, the second transmission shaft The drive shaft is connected with the winding drum in a drive. 7. The roller blind driving device according to claim 4, wherein the transmission mechanism further comprises a single-stage gear transmission pair arranged between the first rope reel and the output shaft. The stage gear transmission pair includes a first transmission gear and a second transmission gear that are both pivoted on one end face of the base shell close to the driver and mesh with each other, the first transmission gear and the output shaft are fixed coaxially, The second transmission gear is fixed coaxially with the first rope reel. 8 . The rolling shutter driving device according to claim 7 , wherein an end face of the output shaft is provided with a socket at the shaft center, and the gear shaft of the first transmission gear is coaxially inserted into the socket. 9 . inside the hole. 9 . The roller shutter driving device according to claim 7 , wherein the base shell comprises a main shell with an opening at one end and an end cover covering the opening, and one side of the end cover is provided with an elastic A bayonet, the second transmission gear is integrally formed at the end of the first rope reel, and a necking portion is also provided between the end of the first rope reel and the second transmission gear, so The first rope reel is squeezed and clamped into the elastic bayonet by the necking portion and is pivotally connected to the end cover, and the first rope reel and the second transmission gear are located on the inner side of the end cover and the second transmission gear respectively. On the outer side, the first transmission gear is also pivoted on the outer side of the end cover. 10. The rolling shutter driving device according to claim 7 or 9, wherein a corresponding cover is further provided between the base housing and the driving housing to cover the first transmission gear and the second transmission gear and fixedly connect the base casing and the drive casing, the casing is provided with a through hole for the gear shaft of the first transmission gear to pass through; the opposite two ends of the casing facing the base casing. A first snap portion is provided on the side, and a second snap portion is correspondingly provided on two opposite sides of the end portion of the base shell, and the first snap portion and the second snap portion are mutually snapped.

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