CN220748084U - Synchronous control pull rope winding device for curtain - Google Patents

Abstract

A synchronous control pull cord retractor for a window covering, comprising: the curtain structure comprises a first driving piece, a second driving piece, two unidirectional joint groups, a first rope winder, a second rope winder and a synchronous controller, wherein the first driving piece and the second driving piece are respectively provided with the unidirectional joint groups, and the first rope winder and the second rope winder are driven by the unidirectional joint groups, so that when the curtain structure pulls the ejector rod and the bottom rod to lift and move through the first driving piece and the second driving piece, the synchronous controller not only has the effects of engaging synchronous rotation and stopping, but also can form an idle state in due time through the unidirectional joint groups to have fool-proof effect, thereby avoiding the doubt of the damage of the synchronous controller caused by continuous pulling of the first driving piece and the second driving piece, and improving the practicability and the durability.

Description

Synchronous control pull rope winding device for curtain

Technical Field

The utility model relates to a curtain rolling device, in particular to a pull rope rolling device which is applied to synchronous control of a curtain capable of being adjusted to rise and fall in a bidirectional mode.

Background

According to the method, a window in a home or a workplace is provided with a curtain, so that light can be prevented from entering a room through the window, and the peeping of other people from the outside can be prevented, the curtain is controlled to lift through a pull rope to achieve the shielding effect, but sunlight can only enter the room from the bottom end of the window in a low-angle mode at the dusk moment, and if the curtain is lowered to the lowest position, the whole window can be shielded to cause the problems of darkness and poor ventilation in the room. The curtain can be folded up and down to be unfolded at the bottom end of the curtain, and can be lowered at the top end of the curtain to be mutually close to the bottom end of the curtain or raised to be close to the fixed curtain rod, so that the curtain can be controlled to be integrally positioned at a default position up and down, sunlight with different irradiation angles can be flexibly shielded, but the circulation of air and outdoor natural light is not blocked, and the improved curtain can solve the defects of the conventional telescopic curtain, but in order to independently control the bottom end or the top end of the curtain to be lifted up and down, the used linkage mechanism still has the defects of mutual interference and unsmooth operation, so that the improved curtain still has the necessity of development and improvement.

In view of this, the present inventors have conducted years of manufacturing development and design experience of related products, and have aimed at the above-mentioned objects, and have devised detailed designs and judicious evaluations, to obtain the practical utility model.

Disclosure of Invention

The utility model aims to solve the technical problems that the prior art has the defects, and provides a pull rope rolling device for synchronously controlling a curtain, which is mainly applied to a curtain structure capable of bidirectionally adjusting the lifting of the curtain, and comprises: the first driving piece and the second driving piece respectively drive a first rotating shaft and a second rotating shaft to rotate, the first driving piece and the second driving piece are respectively provided with a driving mandrel, the front end of the driving mandrel is provided with a connecting hole which is not round, the first rotating shaft and the second rotating shaft respectively penetrate through and combine with the first rope winding device and the second rope winding device to form linkage, the synchronous controller is provided with a first screw rod and a second screw rod which are in screw operation along a base body, the first screw rod is connected with the first rotating shaft to operate, the second screw rod is connected with the second rotating shaft to operate, and the end parts of the first screw rod and the second screw rod are mutually in linkage when abutted, and the synchronous controller is characterized in that: the front ends of the first driving piece and the second driving piece are both assembled with the one-way joint group, and the one-way joint group is used for connecting and linking the first rotating shaft and the second rotating shaft, wherein the one-way joint group is provided with a driven ring, a torsion spring, a driving piece, a rotating shell seat and a shell, the driven ring is rotatably sleeved outside the driving mandrel in a penetrating way, at least three braking claws are convexly arranged on the driven ring at equal intervals, the torsion spring is tightly arranged outside the driving mandrel in a surrounding way, two ends of the torsion spring are bent upwards and provided with two braking parts, the braking parts are pushed by the braking parts to drive the braking claws, one end of the driving piece is provided with a clutch convex part, the periphery of the clutch convex part is provided with a plurality of ratchets and tooth sockets, the other end of the driving piece is provided with a non-cylindrical combining convex column which is in fit with the connecting hole, the rotating shell seat covers the driven ring, the torsion spring and the driven ring, the inner wall of the rotating shell seat forms a clutch concave part, the periphery of the clutch concave part is provided with a plurality of idle grooves and corresponding idle grooves which are respectively matched with the rotating shell seat, the rotating shell seat is provided with the first end face and the rotating shell, the rotating shell is provided with the rotating end face of the rotating shell, the rotating shell is provided with the rotating shell, and the rotating shell is provided with the rotating shell of the rotating shell.

Preferably, a snap-locking protrusion is disposed at the center of the clutch protrusion of the driving member, a through hole is disposed at the center of the clutch recess of the rotary housing, and the through hole penetrates through the snap-locking protrusion to be locked, so that the driving member is further rotationally limited in the rotary housing.

Preferably, the periphery of the first driving piece and the second driving piece is provided with a plurality of buckling grooves, and the periphery of the shell is provided with a plurality of elastic buckling pieces which are in buckling combination with the buckling grooves.

Efficacy against prior art:

the first driving piece and the second driving piece are respectively provided with the unidirectional joint group, and the unidirectional joint groups are connected with the first rotating shaft and the second rotating shaft, so that when the curtain structure pulls the ejector rod and the bottom rod to lift and act through the first driving piece and the second driving piece, the synchronous controller not only has the effects of synchronous rotation and blocking, but also can form an idle state at proper time through the unidirectional joint groups to have fool-proof effect, thereby avoiding the worry that the synchronous controller is damaged due to continuous pulling of the first driving piece and the second driving piece, achieving the purpose of protecting the first driving piece, the second driving piece and the synchronous controller, being beneficial to improving the durability of the first driving piece and the second driving piece and having practical improvement.

Drawings

Fig. 1 is a perspective view of the present utility model.

Fig. 2 is an exploded perspective view of the rope winding device of the present utility model.

Fig. 3 is an exploded view of the present utility model in which the front end of the first (second) driving member is provided with a one-way joint group.

Fig. 4 is a cross-sectional view of the installation of the window covering structure of the present utility model.

Fig. 5 is an enlarged partial cross-sectional view of the window attachment of the present utility model.

FIG. 6 is a schematic view of the present utility model with the bottom bar lowered and the curtain deployed via the first drive member.

Fig. 7 is an enlarged partial cross-sectional view of the first driving member of the present utility model controlling the lowering of the bottom bar.

Fig. 8 is an operational cross-sectional view of the first driving member of the present utility model controlling the lowering of the bottom bar.

Fig. 9 is a schematic view of the first driving member controlling the bottom rod to descend and the driving member idling in the rotary housing.

FIG. 10 is a cross-sectional view of the bottom bar of the present utility model lowered to the bottom and the first screw positioned against one end of the housing.

FIG. 11 is a schematic view of the bottom bar of the present utility model lowered to the bottom and the first driving member idle.

Fig. 12 is an enlarged partial cross-sectional view of the second driver of the present utility model controlling the lowering of the jack.

Fig. 13 is an operational sectional view of the second driving member of the present utility model for controlling the lowering of the jack.

Fig. 14 is a schematic view of the second driving member controlling the ejector rod to descend and the driving member idling in the rotary housing.

FIG. 15 is a schematic view showing the second driving member of the present utility model continuously controlling the ejector rod to descend, and the second screw rod is positioned against the second screw rod.

Fig. 16 is a schematic view showing the second driving member of the present utility model continuously pulled to form an idle state.

Fig. 17 is an enlarged partial cross-sectional view of the second driving member of the present utility model controlling the elevation of the jack.

Fig. 18 is an operational sectional view of the second driving member of the present utility model for controlling the lift of the jack.

Fig. 19 is an enlarged partial cross-sectional view of the first driving member of the present utility model controlling the elevation of the bottom bar.

Fig. 20 is an operational cross-sectional view of the first driving member of the present utility model controlling the elevation of the bottom bar.

FIG. 21 is a schematic view of the unidirectional joint assembly of the present utility model idling in the second driving member.

Fig. 22 is a schematic view of the rotating housing inside the second driving member of the present utility model idling outside the driving member.

Symbol description:

10 first driving member

11 drive spindle

111 connecting hole

12 snap groove

13 first rotating shaft

14 pull rope

20 second driving member

21 drive spindle

211 connecting hole

22 snap groove

23 second rotation shaft

24 pull rope

30 one-way joint group

31 driven ring

311 brake claw

32 torsion spring

321, braking part

33 driving member

331 clutch convex part

332 ratchet teeth

333 tooth space

334 spring button convex column

335 joining the studs

34 rotating housing seat

341 clutch recess

342 idle groove

343 steel ball

344 through hole

345 convex column

346 through hole

35 casing

351 through-hole

352 spring buckle piece

40 first rope winder

50 second rope winder

60 synchronous controller

61, seat body

62 first screw

63 second screw

70 curtain structure

71 upper beam

72 push rod

73 bottom bar

74 curtain sheet

75 rope body

Detailed Description

For a further understanding and appreciation of the objects, features, and advantages of the present utility model, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

first, please refer to fig. 1, 2 and 3, a curtain synchronous control cord winding device, which comprises: the first driving member 10 and the second driving member 20 each have a driving spindle 11, 21, the front ends of the driving spindles 11, 21 have a non-circular hole-shaped connecting hole 111, 211, the peripheries of the first and second driving members 10, 20 are provided with a plurality of fastening slots 12, 22, the front ends of the first and second driving members 10, 20 are respectively provided with a unidirectional joint group 30, and the unidirectional joint group 30 is respectively connected with a first rotating shaft 13 and a second rotating shaft 23 to drive the first rotating shaft 23, wherein the unidirectional joint group 30 has a driven ring 31, a torsion spring 32, a driving member 33, a rotating housing 34 and a housing 35, the driven ring 31 is rotatably sleeved outside the driving spindles 11, 21, at least three braking claws 311 are equidistantly and convexly arranged on the driven ring 31, the torsion spring 32 is tightly arranged outside the driving spindles 11 and 21 in a surrounding way, two ends of the torsion spring 32 are respectively provided with two braking parts 321 which are upwards bent, the braking claws 311 are driven by pushing the braking parts 321, one end of the driving piece 33 is provided with a clutch convex part 331, a plurality of ratchets 332 and tooth sockets 333 thereof are equidistantly arranged on the periphery of the clutch convex part 331, a snap convex column 334 is arranged at the center of the clutch convex part 331, the other end of the driving piece 33 is provided with a non-cylindrical combining convex column 335 which is matched and connected with the connecting holes 111 and 211, the rotating housing 34 covers the driven ring 31, the torsion spring 32 and the driving piece 33 and is connected with the driven ring 31 to form a linkage, the inner wall of the rotating housing 34 forms a clutch concave part 341, the clutch concave 341 has a plurality of idle grooves 342 and a plurality of steel balls 343 corresponding to the idle grooves 342, and is engaged with the clutch convex 331 of the driving member 33 to form a clutch state, a through hole 344 is provided at the center of the clutch concave 341 of the rotary housing 34, the through hole 344 is connected by passing through the snap-fit convex stud 334, a convex stud 345 is provided at the front end of the rotary housing 34, a non-circular hole-shaped through hole 346 is provided at the end surface of the convex stud 345 for connecting the first and second rotating shafts 13 and 23, the housing 35 covers the rotary housing 34, the driving member 33, the torsion spring 32 and the driven ring 31, a through hole 351 is provided at the front end surface of the housing 35 for the convex stud 345 to pass through, the rotary housing 34 is further rotatably limited in the casing 35, a plurality of elastic buckling pieces 352 are arranged at the periphery of the casing 35 and are buckled and fixed with buckling grooves 12, 22 of the first driving member 10 and the second driving member 20, the first rotating shaft 13 and the second rotating shaft 23 respectively penetrate through and combine with the first rope winder 40 and the second rope winder 50 to form linkage, the synchronous controller 60 is provided with a first screw rod 62 and a second screw rod 63 which are in screwing motion along a housing 61, the first screw rod 62 is connected with the first rotating shaft 13 to be actuated, the second screw rod 63 is connected with the second rotating shaft 23 to be actuated, and the end parts of the first screw rod 62 and the second screw rod 63 are mutually in interlocking motion when abutted.

The structure is assembled and applied, as shown in fig. 2 to 5, the pull cord winding device is applied to a curtain structure capable of bidirectionally adjusting the lifting of the curtain, the curtain structure 70 comprises an upper beam 71, a top rod 72, a bottom rod 73, a curtain sheet 74 between the top rod 72 and the bottom rod 73, and a plurality of cord bodies 75 respectively controlling the lifting actions of the top rod 72 and the bottom rod 73, the front ends of the first driving member 10 and the second driving member 20 are respectively provided with a unidirectional joint group 30, the clutch directions of the two unidirectional joint groups 30 are opposite, one ends of the first rotating shaft 13 and the second rotating shaft 23 are respectively penetrated through penetrating holes 346 of the second unidirectional joint group 30 on the rotating shell seat 34, the first and the second cord winding devices 40 and 50 are respectively penetrated through penetrating holes of the first rotating shaft 13 and the second rotating shaft 23 to form linkage, the first and the second rotating shafts 62 and 63 of the synchronous controller 60 are firstly screwed on the seat body 61, the first and the second rotating shaft 62 and the second rotating shaft 63 are respectively screwed on the seat body 61, the ends of the first and the second rotating shaft 62 and the second rotating shaft 63 are respectively screwed on the second rotating shaft 62 and the second rotating shaft 60, the second rotating shaft 60 and the second rotating shaft 60 are respectively wound on the second rotating shaft 60 and the second rotating shaft 60, the synchronous shaft 60 is respectively wound on the second rotating shaft 60 and the lifting device 50 to form the synchronous structure.

In the actual use state of the structure, as shown in fig. 5 to 9, when the curtain structure 70 is not in use, the bottom rod 73 concentrates the curtain sheet 75 upwards below the top rod 72, the top rod 72 is propped upwards against the bottom of the upper beam 71, so that the curtain structure 70 forms a completely opened and transparent state, the ends of the first and second screws 62 and 63 of the synchronous controller 60 are matched, the first driving member 10 controls the bottom rod 73 to lift and lower, the second driving member 20 controls the top rod 72 to lift and lower, accordingly, when the pull rope 14 of the first driving member 10 is pulled clockwise and the bottom rod 73 is controlled to lower to form the unfolding state of the curtain sheet 74, the driving spindle 11 of the first driving member 10 synchronously drives the torsion spring 32 and the driving member 33 of the unidirectional joint set 30 to rotate, when the torsion spring 32 rotates clockwise along with the driving spindle 11, the detent portion 321 pushes the detent claw 311 of the driven ring 31, so as to drive the rotating housing 34 to rotate and drive the first rope winder 40 to unwind the rope 75 through the rotation of the first rotating shaft 13, so that the bottom rod 73 drops vertically naturally to achieve the purpose that the curtain 74 spreads downwards to form a shade, and the driving member 33 pushes the steel ball 343 into the idle groove 342 of the clutch concave portion 341 through the ratchet teeth 332 when acting clockwise, so that the clutch convex portion 331 and the clutch concave portion 341 form a disengaged state, and the driving member 33 rotates in the rotating housing 34 in an idle motion; at the same time, the first screw 62 of the synchronous controller 60 rotates along the base 61 and gradually moves away from the second rotating shaft 23 as the first rotating shaft 13 rotates; in addition, when the bottom rod 73 is completely lowered, as shown in fig. 10 and 11, the first screw 62 is screwed against one end of the base 61 to form a limit state, and the first rotating shaft 13 is limited to be unable to be rotated, at this time, the rotating housing 34 and the driven ring 31 form an unable rotating state along with the first rotating shaft 13, and the braking portion 321 of the torsion spring 32 is abutted against the unable rotating driven ring 31 to release the driving spindle 11, so that when the first driving member 10 continuously pulls the pull rope 14, the driving spindle 11 still rotates and drives the driving member 33 to idle in the rotating housing 34, thereby avoiding damage to the component caused by continuously pulling the pull rope 14.

Furthermore, when the pull rope 24 of the second driving member 20 is pulled counterclockwise and the push rod 72 is controlled to descend, as shown in fig. 12 to 14, the driving spindle 21 of the second driving member 20 synchronously drives the torsion spring 32 and the driving member 33 of the unidirectional joint set 30 to rotate, wherein when the torsion spring 32 rotates counterclockwise along with the driving spindle 21, the braking claw 311 of the driven ring 31 is pushed by the braking portion 321 at the same time, so as to drive the rotating housing 34 to rotate and drive the second rope winder 50 to release the rope 75 through the rotation of the second rotating shaft 23, so that the push rod 72 is naturally lowered and the curtain sheet 74 is collected in the direction of the bottom rod 73, and meanwhile, the push rod 72 is lowered away from the upper beam 71 to form a light transmission effect of the upper half of the curtain, and when the driving member 33 moves counterclockwise, the steel ball 343 is pushed into the idle groove 342 of the clutch concave 341 through the ratchet 332, so that the clutch convex 331 and the clutch concave 341 form a disengaged state, and the driving member 33 is idle-rotated in the rotating housing 34; at the same time, the second screw 63 of the synchronous controller 60 rotates along the base 61 and gradually approaches the first screw 62 as the second rotating shaft 23 rotates; furthermore, when the top rod 72 descends and the curtain sheet 74 is collected downward above the bottom rod 73, as shown in fig. 15 and 16, the second screw 63 is screwed against the first screw 62 to form a positioning state, and the second rotating shaft 23 is limited from being rotated, at this time, the rotating housing 34 and the driven ring 31 form a non-rotating state along with the second rotating shaft 23, and the braking portion 321 of the torsion spring 32 is abutted against the non-rotating driven ring 31 to release the driving mandrel 11, so that when the second driving member 20 continuously pulls the pull rope 24, the driving mandrel 21 still rotates and drives the driving member 33 to idle in the rotating housing 34, thereby avoiding damage to the part caused by continuously pulling the pull rope 14.

When the pull rope 24 of the second driving member 20 is pulled and the push rod 72 is controlled to move upward, as shown in fig. 17 and 18, the pull rope 24 pulls the driving spindle 21 clockwise, and at this time, the driving spindle 21 drives the torsion spring 32 and the driving member 33 to rotate clockwise, and the driving member 33 guides the steel balls 343 into the tooth slots 333 through the ratchet teeth 332 of the clutch protrusion 331, and the steel balls 343 are abutted against the tooth slots 333 and the openings of the idle slots 342, so that the clutch protrusion 331 and the clutch recess 341 form a snap-in state, so that the rotating housing seat 34 is directly driven to rotate through the driving member 33, and the second rotating shaft 23 is further driven to rotate clockwise and the second rope winder 50 is driven to wind up the rope body 75, so that the push rod 72 moves upward and the curtain 74 is spread out toward the upper beam 71, thereby forming a shading effect of the upper half of the curtain; at the same time, the second screw 63 of the synchronous controller 60 rotates along the base 61 and gradually moves away from the first screw 62 as the second rotating shaft 23 rotates.

When the pull rope 14 of the first driving member 10 is pulled and the bottom rod 73 is controlled to move upwards, as shown in fig. 19 and 20, the pull rope 14 pulls the driving spindle 11 to rotate anticlockwise, at this time, the driving spindle 11 drives the torsion spring 32 and the driving member 33 to rotate anticlockwise, and the driving member 33 guides the steel balls 343 into the tooth grooves 333 through the ratchet teeth 332 of the clutch convex portion 331, and the steel balls 343 are abutted between the tooth grooves 333 and the openings of the idle grooves 342, so that the clutch convex portion 331 and the clutch concave portion 341 form a meshing state, and the driving member 33 can directly drive the rotating housing 34 to rotate, and then drive the first rotating shaft 13 to rotate anticlockwise and drive the first rope winder 40 to wind up the rope body 75, so that the bottom rod 73 can move upwards and the curtain sheet 74 is folded towards the push rod 72, thereby forming a light transmission effect of the curtain; at the same time, the first screw 62 of the synchronous controller 60 rotates along the base 61 and gradually approaches the second screw 63 as the first shaft 13 rotates.

In addition, when the top rod 72 is not fully abutted against the bottom of the upper beam 71 and the pull rope 14 of the first driving member 10 is continuously pulled to lift the bottom rod 73 to fold the curtain sheet 74, the first screw 62 is simultaneously driven to close to the second screw 63 during the lifting process of the bottom rod 73, when the curtain sheet 74 is fully folded between the top rod 72 and the bottom rod 73, the first screw 62 is closely matched with the second screw 63 (as shown in fig. 19), and when the curtain sheet 74 is folded by the first driving member 10, the rotating housing 34 is engaged by the driving member 33 to form a direct transmission state, so that the folding force is large and the second screw 63 can be simultaneously driven to rotate by the first screw 62, thereby synchronously rotating the second rotating shaft 23 and driving the second rope winder 50 to fold the rope body 75, the push rod 72 is synchronously pushed up, and when the second rotating shaft 23 is synchronously rotated, as shown in fig. 21 and 22, the rotating housing 34 of the second driving member 20 and the driven ring 31 synchronously rotate clockwise along with the second rotating shaft 23, and the braking claw 311 of the driven ring 31 reversely pushes the braking portion 321 of the torsion spring 32, so that the torsion spring 32 is released and idles outside the driving spindle 11, so that the driven ring 31 and the rotating housing 34 do not drive the driving spindle 21 to rotate when rotating, and the rotating housing 34 idles outside the driving member 33, thereby avoiding linking the second driving member 20 to ensure the stability of the structure operation, and further improving the convenience and practicability of the curtain operation.

By the structure of the above specific embodiment, the following benefits can be obtained: the first and second driving members 10 and 20 of the present utility model are respectively provided with the unidirectional joint set 30, and the unidirectional joint set 30 is used to connect the first and second rotating shafts 13 and 23, so that when the curtain structure 70 pulls the top rod 72 and the bottom rod 73 to lift and move through the first and second driving members 10 and 20, not only the synchronous controller 60 can have the effects of engaging synchronous rotation and blocking, but also the unidirectional joint set 30 can form an idle state at proper time to have the fool-proof effect, thereby avoiding the problem that the synchronous controller 60 is damaged due to the continuous pulling of the first and second driving members 10 and 20, achieving the purpose of protecting the first and second driving members 10 and 20 and the synchronous controller 60, and being helpful for improving the durability of the first and second driving members 10 and 20 and improving the practicality.

The foregoing is merely illustrative of a preferred embodiment of the present utility model, and is not intended to limit the scope of the utility model; all such equivalent changes and modifications as defined by the claims should be considered as falling within the scope of the present utility model.

Claims (3)

1. A kind of curtain synchronous control stay cord furling device, mainly apply to a kind of curtain structure that can adjust the curtain to go up and down bidirectionally, it includes: the first driving piece and the second driving piece respectively drive a first rotating shaft and a second rotating shaft to rotate, the first driving piece and the second driving piece are respectively provided with a driving mandrel, the front end of the driving mandrel is provided with a connecting hole which is not round, the first rotating shaft and the second rotating shaft respectively penetrate through and combine with the first rope winding device and the second rope winding device to form linkage, the synchronous controller is provided with a first screw rod and a second screw rod which are in screw operation along a base body, the first screw rod is connected with the first rotating shaft to operate, the second screw rod is connected with the second rotating shaft to operate, and the end parts of the first screw rod and the second screw rod are mutually in linkage when abutted, and the synchronous controller is characterized in that: the front ends of the first driving piece and the second driving piece are both assembled with the one-way joint group, and the one-way joint group is used for connecting and linking the first rotating shaft and the second rotating shaft, wherein the one-way joint group is provided with a driven ring, a torsion spring, a driving piece, a rotating shell seat and a shell, the driven ring is rotatably sleeved outside the driving mandrel in a penetrating way, at least three braking claws are convexly arranged on the driven ring at equal intervals, the torsion spring is tightly arranged outside the driving mandrel in a surrounding way, two ends of the torsion spring are bent upwards and provided with two braking parts, the braking parts are pushed by the braking parts to drive the braking claws, one end of the driving piece is provided with a clutch convex part, the periphery of the clutch convex part is provided with a plurality of ratchets and tooth sockets, the other end of the driving piece is provided with a non-cylindrical combining convex column which is in fit with the connecting hole, the rotating shell seat covers the driven ring, the torsion spring and the driven ring, the inner wall of the rotating shell seat forms a clutch concave part, the periphery of the clutch concave part is provided with a plurality of idle grooves and corresponding idle grooves which are respectively matched with the rotating shell seat, the rotating shell seat is provided with the first end face and the rotating shell, the rotating shell is provided with the rotating end face of the rotating shell, the rotating shell is provided with the rotating shell, and the rotating shell is provided with the rotating shell of the rotating shell.

2. The device for synchronously controlling a pull cord and a winding up a curtain as claimed in claim 1, wherein a snap-on protrusion is provided at the center of the clutch protrusion of the driving member, a through hole is provided at the center of the clutch recess of the rotary housing, and the through hole penetrates through the snap-on protrusion to be engaged with the snap-on protrusion, so as to further limit the driving member to the rotary housing.

3. The rope winding device for synchronously controlling curtains according to claim 1, wherein a plurality of buckling grooves are formed in the peripheries of the first driving member and the second driving member, and a plurality of elastic buckling pieces are formed in the periphery of the casing and are in buckling connection with the buckling grooves.