TW202308545A - Curtain operated by cord capable of installing the cord winding mechanism and the transmission mechanism at any position of the curtain track, and the cord passes through the openings of the curtain track to allow operation - Google Patents

Abstract

The invention relates to a curtain operated by a cord, which contains: a curtain track, its two side walls being provided with openings; a cord pulling mechanism having a drive member and a cord, the cord pulling mechanism being installed in the curtain track; the cord passes through the curtain track from the openings of the curtain track, such that when the cord is pulled, the drive member is driven to rotate; a transmission mechanism set in the curtain track, the drive member driving the transmission axis of the transmission mechanism to rotate. The invention can install the cord winding mechanism and the transmission mechanism at any position of the curtain track, and the cord passes through the openings of the curtain track to allow operation.

Description

cord operated curtains

The present invention relates to curtains, in particular, refers to a curtain operated by a pull cord.

Curtains are necessary items in the home to block sunlight and adjust indoor brightness. There are many types of curtains, and different types of curtains have different operation methods. One of the common operation methods is to control the curtains with pull cords (including ropes or beads).

Known curtains controlled by stay cords have their stay cords and stay cord mechanisms exposed at one end of the curtain rail. This type has been in use for a long time and has never changed.

The invention aims to break through the traditional pattern and provide a brand-new type of curtain. The object of the present invention is to provide a cord-operated curtain, the cord of which can be arranged at any position of the curtain rail as required.

Another object of the present invention is to provide a cord-operated curtain so that the curtain has a simple and beautiful appearance.

In order to achieve the above-mentioned goals, the curtains operated by the pull cords provided by the present invention include: A curtain rail, which is a hollow elongated body, has two side walls; two openings are respectively arranged on the two side walls of the curtain rail; A drawstring mechanism has a seat body, a driving part and a pull cord. The drawstring mechanism is installed in the curtain rail; the drive part can rotate; The hole passes through the curtain rail, and when the pull cord is pulled, the driving part is driven to rotate; A transmission mechanism is installed in the curtain rail and includes a transmission shaft, which is arranged along the longitudinal direction of the curtain rail; the driving part of the drawstring mechanism drives the transmission shaft to rotate. In this way, the present invention can install the rope winding mechanism and the transmission mechanism at any position in the curtain rail according to the needs or the characteristics of the installation site, and the pull cord passes through the opening of the curtain rail. The drawstring mechanism is not exposed at the end of the curtain rail, so that the appearance of the curtain is simple and beautiful.

Preferably, the transmission mechanism further includes a transmission and stop assembly, and the driving part of the pull-cord mechanism drives the transmission shaft to rotate by the transmission and stop assembly; when the drive part does not drive the transmission shaft, the transmission The shaft is stopped by the transmission and stop assembly and cannot rotate.

Preferably, the transmission mechanism is arranged behind the pull cord mechanism, and the transmission and stop assembly includes: a pushing part, a follower, at least one stop coil and a ring body, and the stop coil has two ends , and set on the ring body, the center of the transmission part has a connecting hole; a pushed part is located on the transmission part, and the pushed part and the pushing part surround the ring body and the stop coil , the two ends of the stop coil are respectively located between the two ends of the pushing part and the two ends of the pushed part; the transmission shaft is connected with the connecting hole of the follower; Drive the pushed part to rotate, one end of the pushed part pushes one end of the stop coil and pushes the pushed part, so that the stop coil, the follower and the transmission shaft rotate; the pushed When one end of the part pushes one end of the stop coil, the stop coil tightens the ring so that the transmission shaft cannot rotate.

Preferably, the transmission mechanism further includes: a transmission part; the pushing part is arranged on the transmission part; the driving part of the drawstring mechanism drives the transmission part to rotate.

Preferably, it further includes: a deceleration mechanism, which is arranged between the cable-drawing mechanism and the transmission mechanism, and the driving part of the cable-drawing mechanism drives the transmission and stop assembly to act through the deceleration mechanism.

Preferably, the driving part of the pull-cord mechanism is connected to the input end of the deceleration mechanism; the output end of the deceleration mechanism is connected to the pushing part.

Preferably, the reduction mechanism has a ring gear, and a front frame installed in the ring gear, a rear frame, a sun gear and several planetary gears, the sun gear and the planetary gears are pivoted on the front between the frame and the rear frame, and the planetary gears mesh with the ring of the ring gear; the driving element is connected with the sun gear to generate linkage; the rear frame is connected to the transmission element to generate linkage.

Preferably, it further includes: a casing, an accommodating space is formed inside; the ring body is fixed in the accommodating space of the casing.

Preferably, the transmission and stop assembly of the transmission mechanism further includes; an inner ring, which is arranged in the accommodation space of the housing and cannot rotate; the inner peripheral surface of the ring is pivoted with a number of rolling elements, The body is sheathed on the inner ring, and the moving rolling element contacts the outer peripheral surface of the inner ring; the ring body, the rolling elements and the inner ring form a one-way bearing.

Please refer to Fig. 1 to Fig. 4, it is a curtain 10 operated by a pull cord provided by a preferred embodiment of the present invention. The rope or pearl chain of curtain product, in this preferred embodiment, described stay cord is an example with pearl chain. The curtain 10 includes: a curtain rail 20 , a drawstring mechanism 30 , and a transmission mechanism 50 . The relevant components of the curtain 10 are installed in the curtain rail 20 .

The curtain rail 20 is a hollow elongated body, such as an extruded body, with a single-shaped cross section and two side walls 22; two openings 24 are respectively arranged on the two side walls 22 of the curtain rail, and correspond to each other. The components of the curtain 10 described below are installed in the inner space of the curtain rail 20 .

The pull cord mechanism 30 has a seat body 32, a driver 34 and a pull cord 36, the drive member 34 is installed in the seat body 32, and can rotate; the pull cord 36 can drive the drive member 34 to rotate, the The driving member 34 also drives the pushing part 51 of the transmission mechanism 50 to rotate. The seat body 32 is formed by buckling a front half seat 321 and a rear half seat 322 , so that the driving member 34 is installed between the two half seats 321 , 322 . The front half seat 321 and the rear half seat 322 are fastened to each other by buckles 323 , 324 .

Please refer to FIG. 5 and FIG. 6 together, wherein, FIG. 6 omits the transmission shaft of the transmission mechanism 50 to facilitate understanding of related components and structures. The driving member 34 is a pearl plate in this embodiment, and is a hollow ring body, and is sleeved on the cylindrical portion 325 of the front end surface of the rear half seat 322, so that it can rotate freely. The hollow shaft portion 35 at the front end of the driver 34 protrudes forward from the hole 326 of the front half seat 321 and is fastened with a fastener 327 . The pull cord 36 is a pearl chain, which is connected in a circle and is wound around the outer periphery of the driving member 34 . The pull cord 36 passes through the curtain rail 20 from the two openings 24 , and the driving member 34 is rotated when the pull cord 36 is pulled. When the driving member 34 rotates, it drives the transmission mechanism 50 , thereby causing the transmission shaft 58 of the transmission mechanism 50 to rotate.

The drawstring mechanism 30 is installed in the curtain rail 20, the seat body 32 is configured to match the inner wall surface of the curtain rail 20, and is fitted with the rib 26 on the inner peripheral surface of the curtain rail 20, so that the seat The body 32 is constrained by the configuration of the inner wall of the curtain rail 20, and can only move longitudinally of the curtain rail 20, but cannot rotate.

The transmission mechanism 50 has a pusher 51. When the driving member 34 rotates, it drives the pusher 51 to rotate, so that the pusher 51 pushes at least one stop coil 60 and a follower 54. In this embodiment, A retaining coil 60. The pushing part 51 can be integrally formed with the driving part 34 and fixed on the rear end surface of the driving part 34 , so that the driving part 34 directly drives the pushing part 51 to rotate. Or, as shown in this preferred embodiment, the curtain 10 further includes a deceleration mechanism 40, which is arranged between the drawstring mechanism 30 and the transmission mechanism 50, and the driving member 34 is driven by the deceleration mechanism 40. Pushing part 51. The deceleration mechanism makes the operation of the curtain more labor-saving.

The reduction mechanism 40 has a hollow front frame 41 , a hollow rear frame 42 , a sun gear 43 and three planetary gears 45 pivotally disposed between the front frame 41 and the rear frame 42 . A ring gear 46 is formed in a frame body. In this embodiment, the frame body and the rear half seat 322 are integrally formed so that the ring gear 46 is located at the rear end of the seat body 32 . The front frame, the rear frame 42 , the sun gear 43 and the planetary gear 45 are arranged in the ring gear 46 , and the three planetary gears 45 are meshed with the teeth of the ring gear 46 . The non-circular or polygonal (for example hexagonal) post 44 provided at the front end of the sun gear 43 passes through the hole in the center of the front frame 41 and is plugged into the corresponding non-circular or polygonal post of the driver 34. The angular (for example, hexagonal) connection hole 341 makes the driving member 34 and the sun gear 43 have a synchronously rotating interlocking relationship. It can be understood that the connecting post 44 and the connecting hole 341 are interchangeable, that is, the connecting post 44 can be arranged on the rear end surface of the driving member 34 , and the connecting hole 341 can be arranged in the large male gear 43 . The cover 48 of the reduction mechanism 40 is to close the rear end of the ring gear 46, so that the aforementioned related components 41, 42, 43, 45 will not fall out of the ring gear. The surrounding surface of the cover 48 buckles the buckle portion 328 of the base body 32 (or the aforementioned frame body) with a plurality of buckle portions 481 . The rope-drawing mechanism 30 , the deceleration mechanism 40 and the transmission mechanism 50 are arranged concentrically and rotate concentrically.

The transmission mechanism 50 is arranged behind the reduction mechanism 40 and includes: a transmission and stop assembly and a transmission shaft 58. The transmission and stop assembly includes: the pushing part 51, a transmission part 52, the driven part 54, The retaining coil 60 , a metal ring 62 and a rear shell 65 . The rear shell 65 is a cylindrical shell with an open front end and a closed rear end, and an accommodating space 66 inside. The back shell 65 is fixed on the rear end of the cover 48 with a threaded element (not shown) and its similar connecting elements. The body 62 is disposed in the receiving space 66 of the rear case 65 and is covered by the rear case. The ring body 62 is fixed in the rear shell 65 .

The aforementioned pushing part 51 is a convex wall, preferably an arc-shaped convex wall with a predetermined arc length, and is arranged on the rear end surface of the disc-shaped transmission member 52 . Please refer to FIG. 6 , the center of the front end of the transmission member 52 is inserted through the hole 482 of the cover 48 with a shaft portion 521 , and the tenon 53 at the front end of the transmission member 52 and the tenon of the rear frame 42 of the reduction mechanism 40 421 connection, so that the driving member 34 can drive the transmission member 52 and the pushing part 51 to rotate through the reduction mechanism 40 . The hollow shaft portion 422 of the rear frame 42 also passes through the hole 482 of the cover 48 . The sun gear 43 of the reduction mechanism 40 is its input end, which is connected to the driving member 34; Afterwards, the transmission member 52 is driven to rotate, that is, the transmission mechanism 50 is driven to operate.

The central part of the follower 54 is provided with a non-circular or polygonal (such as quadrangular) connecting hole 55; a pushed part 56 is located on the rear end surface of the follower 54, which is a convex wall, and is shaped like A circular convex wall is preferred. The driven member 54 is located behind the transmission member 52 , and the pushing portion 51 and the pushed portion 56 form a circle and surround the ring body 62 and the retaining coil 60 together, as shown in FIG. 7 . A ring 57 is positioned on the inner peripheral surface of the rear shell 65 and wraps around the outer periphery of the transmission member 52 .

The retaining coil 60 is formed by winding a metal wire body into a predetermined number of turns, and its two ends 601, 602 protrude outward and keep a distance. The ring body 62 is installed in the accommodation space 66 of the rear shell 65, the stop coil 60 is sleeved on the outer peripheral surface of the ring body 62, when the stop coil 60 tightens the ring body 62, it cannot Rotate on the ring. In practice, the ring body 62 can be fixed in the rear shell 65, for example, fixedly connected to the rear end surface of the rear shell, so the ring system is fixed and cannot be moved or rotated. Please refer to FIG. 7 , the pushing part 51 and the pushed part 56 surround the ring body 62 and the retaining coil 60 together, and the two ends 601 and 602 of the retaining coil 60 are located at the pushing part 51 and the retaining coil 60 respectively. In the gap between the pushed parts 56, that is, one end 601 of the stop coil 60 is located between the first end 501 of the push part 50 and the first end 561 of the pushed part 56, and the second end 601 of the stop coil The end 602 is located between the second end 502 of the pushing part 50 and the second end 562 of the pushed part 56 . Under this design, when either end 501, 502 of the pushing part 50 pushes either end 601, 602 of the stop coil 60, the coil body of the stop coil 60 can be expanded (that is, inside the coil The diameter increases), so that the stop coil can rotate freely on the ring body 62. When any end 601, 602 of the stop coil 60 is pushed by either end 561, 562 of the pushed part 56, the body of the stop coil shrinks (that is, the inner diameter of the coil shrinks), and the ring is tightened. Body 62 cannot rotate on the ring body. In this embodiment, the second end 602 of the retaining coil 60 is engaged with the engaging portion 563 of the second end 562 of the pushed portion 56 .

The transmission shaft 58 is a polygonal (such as quadrangular) rod body, which extends through the pull cord mechanism 30, the deceleration mechanism 40 and the transmission mechanism 50 along the longitudinal direction of the curtain rail 20, that is, passes through the seat body 32. The hole in the center of the driving member 34, the hole extending through the center of the front frame 41, the rear frame 42, the large sun gear 43, the cover 48, the hole extending through the center of the transmission member 62, and the ring body 62 and the rear shell 65, and is connected to the connection hole 55 of the follower 54, and the follower 54 and the transmission shaft 58 form a synchronously rotating interlocking relationship.

Please refer to Fig. 8, the transmission shaft 58 is threaded and stretched through several rope reel mechanisms 70 installed in the curtain rail 20, as shown by phantom lines, when the transmission shaft 58 rotates clockwise or counterclockwise, it can drive the reel The mechanism 70 rotates to retract or release the rope to control the opening and closing of the curtain or the blade. The two ends of the curtain rail 20 can be covered by end caps 28 to keep the appearance.

Take the curtain 10 of the present invention equipped with a curtain drapery as an example. When in use, pulling the pull cord 34 can drive the driving member 34 to rotate clockwise or counterclockwise, and then drive the driven member 54 and the transmission shaft 58 in a clockwise direction. Turn clockwise or counterclockwise, and the rope winding mechanism 70 will wind up or release the rope, so that the curtain can be opened or hung down. After the user stops applying force, the stop spring 60 can keep the curtain drapery at the raised and lowered height.

Please refer to Fig. 5 and Fig. 7, and take the direction of Fig. 7 as the criterion, and take the driving member 34 to rotate clockwise to roll up the curtain, and to rotate counterclockwise to hang down the curtain as an example. To raise the curtain When the user pulls the pull cord 36 on the right side of Figure 7, the driver 34 will be driven to rotate clockwise, and the driver 34 will drive the sun gear 43 of the deceleration mechanism 40 to rotate together, and drive the rear frame 42 to the decelerated speed. Rotate, the rear frame 42 rotates clockwise together with the transmission member 52, so that the second end 512 of the pushing part 51 pushes the second end 602 of the stop coil 60 in a clockwise direction, and the stop coil 60 The inner diameter will expand, so that the pushing part 51 can push the pushed part 56, so that the stop coil 60 and the follower 54 can rotate clockwise together with the transmission part 52 and the pushing part 51, and the transmission The shaft 58 is driven by the follower 54 to drive the rope winding mechanism 70 to wind up the rope and open the curtain curtain upwards.

After the force of pulling the pull cord 36 is released, the gravity of the curtain drapery drives the transmission shaft 58 and the follower 54 to rotate counterclockwise. At this time, the second end 562 of the pushed part 56 pushes the stop spring the second end 602 of the ring 60, and shrink the coil body of the stop coil (that is, the inner diameter of the coil is reduced), and then tighten the ring body 62 to produce a tightening effect, so that the coil and the driven coil Part 54 cannot be rotated, allowing the curtain cloth curtain to remain on the adjusted height.

Similarly, based on the direction in FIG. 7 , when the curtain is to be hung down, the user pulls the pull cord 36 on the left side of FIG. deceleration, the rear frame 42 drives the transmission member 52 to rotate counterclockwise at a decelerated speed, so that the first end 511 of the pushing part 51 pushes the first end 601 of the stop coil 60 in the counterclockwise direction to stop The inner diameter of the spring coil 60 will expand, so that the pushing part 51 can push the pushed part 56, so that the stop coil 60 and the driven part 54 can rotate counterclockwise together with the transmission part 52 and the pushing part 51 , the power transmission shaft 58 is driven by the follower 54 to drive the rope winding mechanism 70 to release the rope, and the curtain drapery is hung down.

After stopping pulling the stay cord 36, the gravity system of the curtain cloth drives the transmission shaft 58 and the follower 54 to rotate, and the second end 562 of the pushed part 56 pushes the second end 602 of the stop coil 60, And make the ring body of stop coil shrink, and then be bound in this ring body 62 tightly, make coil and follower 54 can't rotate, curtain drapery remains on the height that is adjusted.

In addition, as mentioned above, the ring body 62 can be fixed in the housing 65 , for example integrally molded with the housing in an embedded manner. In this preferred embodiment, the ring body 62 is installed in the casing 65 in another way. In this embodiment, an inner ring member 67 is encased in the sleeve post 68 of the rear housing 65, and the sleeve post 68 is fixed on the rear end surface of the rear housing; the inner hole 671 of the inner ring member 67 and the shape of the sleeve post 68 are Noncircular or polygonal (such as hexagonal), so the inner ring part 67 cannot rotate. The inner peripheral surface of the ring body 62 is pivotally provided with a plurality of rolling elements 69 of balls or rollers, and the ring body 62 is concentrically sleeved on the inner ring member 67, and the moving rolling element 69 is in contact with the inner ring member 67. peripheral surface. The ring body 62, the rolling elements 69 and the inner ring part 67 form a one-way bearing (the inner ring part 67 becomes the inner ring of the one-way bearing shaft), in order to eliminate the pushing part 51 and the pushed part. 56 pushes the clearance of the retaining coil 60 and assists the retaining action of the retaining coil 60 . The above-mentioned action system of forming the one-way bearing: when the active force drives the ring body 62 from one direction, the ring body 62 can rotate; otherwise, when the active force is in the opposite direction, the ring body 62 does not rotate. In this embodiment, when the pull cord 36 is pulled so that the pushing part 51 pushes the stop coil 60, the ring body 62 is subjected to a rotational force and rotates, so that the stop coil 60 and the ring body 62 can Turn together to implement the operation of raising and lowering the curtain. When the stay cord 36 is not pulled, the ring body 62 remains stationary and cannot rotate, and the stop coil 60 tightens the ring body 62 so that the curtain is positioned at the adjusted height.

The structural feature of the present invention is to make the stay cord 36 pass through the opening 24 of the curtain rail 20. As can be seen in Figure 1, the rope winding mechanism 30, the deceleration mechanism 40 and the transmission mechanism 50 of the present invention form a module, together Installed in the curtain rail 20, and can be arranged at any position in the curtain rail 20, or arranged at any end close to the curtain rail. According to the position of the stay cord 36 required for the curtain installation occasion, the opening 24 is opened at any position of the curtain rail 20 for the stay cord 36 to pass through. For example, as shown in the embodiment of FIG. 9 , the opening 24 and the components of the present invention are arranged at the center of the curtain rail 20 so that the stay cord 36 passes through the center of the curtain rail 20 .

Furthermore, using the present invention, the two ends of the curtain rail are flat, and there is no drawstring mechanism exposed at one end of the curtain rail, so the curtain has a simple and beautiful appearance.

The above disclosed embodiments are only to illustrate the characteristics of the present invention and not to limit them. Any equivalent modification of the present invention should be regarded as the protection scope of the present invention. The present invention is the first structure of similar articles, and has the effect of enhancement, which is in line with the requirements of the patent.

10: Curtains 20: curtain rail 22: side wall 24: opening 26: Ribs 28: End cap 30: Drawstring Mechanism 32: seat body 321: Front half seat 322: Rear seat 323, 324: Buckle 325: cylindrical part 326: hole 327: Fasteners 328: Buckle 34: Driver 341: Connecting hole 36: drawstring 40:Deceleration mechanism 41: front frame 42: rear frame 421: tenon 422: Shaft 43: sun gear 44: post 45: Planetary gear 46: ring gear 48: Capping 481: Buckle 482: hole 50: transmission mechanism 51: Promotion Department 511: first end 512: second end 52: Transmission parts 521: Shaft 53: tenon 54: follower 55: Connection hole 56: Pushed Department 561: first end 562: second end 563: Embedded part 57: Ring 58: Drive shaft 60:Stop coil 601: first end 602: second end 62: ring body 65: Shell 66:Accommodating space 67: Inner ring parts 671: inner hole 68: set column 69: Rolling elements 70: Rope winding mechanism

The purpose, characteristics and achieved effects of the present invention can be understood from the description and drawings of the following preferred embodiments, wherein: Fig. 1 is a perspective view of a cord-operated curtain in a preferred embodiment of the present invention. Fig. 2 is a perspective view of another viewing angle of a curtain in a preferred embodiment of the present invention. Fig. 3 is an exploded perspective view of one of the curtains in Fig. 1 . Fig. 4 is an exploded perspective view of another angle of the curtain in Fig. 1 . Fig. 5 is a sectional view of section line 5-5 in Fig. 1 . Fig. 6 is a cross-sectional view of line 6-6 in Fig. 1, and the transmission shaft of the transmission mechanism is omitted. Fig. 7 is a sectional view of section line 7-7 in Fig. 5 . Fig. 8 is a top view of a curtain in a preferred embodiment of the present invention. Fig. 9 is a perspective view of a curtain in another preferred embodiment of the present invention.

10: Curtains

20: curtain rail

22: side wall

24: opening

28: End cap

30: Drawstring Mechanism

36: drawstring

40:Deceleration mechanism

50: transmission mechanism

58: Drive shaft

Claims (9)

A cord operated window covering comprising: A curtain rail is a hollow elongated body with two side walls; two openings are respectively arranged on the two side walls of the curtain rail and correspond to each other; A cord-drawing mechanism has a base, a driver and a cord, the cord-drawing mechanism is installed in the curtain rail; the driver is rotatably installed in the seat; the cord is wound around the The driving part is passed through the curtain rail from the two openings, and the driving part is driven to rotate when the pull cord is pulled; A transmission mechanism is installed in the curtain rail and includes a transmission shaft, which is arranged along the longitudinal direction of the curtain rail; the driving part of the drawstring mechanism drives the transmission shaft to rotate. The curtain as described in claim 1, wherein: the transmission mechanism further includes a transmission and stop assembly, and the drive part of the pull cord mechanism drives the transmission shaft to rotate by the transmission and stop assembly; the drive part does not drive When the transmission shaft is used, the transmission shaft is stopped by the transmission and stop assembly and cannot rotate. The curtain as described in claim 2, wherein: the transmission mechanism is arranged behind the pull cord mechanism, and the transmission and stop assembly includes: a pushing part, a follower, at least one stop coil and a ring body, the The retaining coil has two ends, and is sheathed on the ring body, and the center of the transmission part has a connecting hole; a pushed part is arranged on the transmission part, and the pushed part surrounds the ring together with the pushing part Body and the stop coil, the two ends of the stop coil are respectively located between the two ends of the pushing part and the two ends of the pushed part; the transmission shaft is connected with the connecting hole of the follower, so that The transmission shaft is linked with the follower; the driving part of the pull cord mechanism drives the pushed part to rotate, and one end of the pushed part pushes one end of the stop coil and pushes the pushed part to make the pushed part The stop coil, the follower and the transmission shaft rotate; when one end of the pushed part pushes one end of the stop coil, the stop coil tightens the ring so that the transmission shaft cannot rotate. The curtain as described in claim 3, wherein: the transmission mechanism further includes: a transmission part; the pushing part is arranged on the transmission part; the driving part of the drawstring mechanism drives the transmission part to rotate. The curtain as described in claim 1 further includes: a speed reduction mechanism, which is arranged between the pull cord mechanism and the transmission mechanism, and the driving part of the pull rope mechanism drives the transmission shaft to rotate through the speed reduction mechanism. The curtain as described in claim 3 further includes: a deceleration mechanism, which is arranged between the drawstring mechanism and the transmission mechanism, and has an input end and an output end; the drive part of the drawstring mechanism is connected to The input end of the deceleration mechanism; the output end of the deceleration mechanism is linked with the pushing part. The curtain as described in claim 4 further includes: a reduction mechanism with a ring gear, and a front frame installed in the ring gear, a rear frame, a sun gear and several planetary gears, the sun gear The planetary gears are pivotally arranged between the front frame and the rear frame, and the planetary gears mesh with the ring of the ring gear; the driving member is connected with the sun gear to generate linkage; the rear frame and the transmission member Connect to generate linkage. The curtain as described in any one of Claims 1 to 7 further includes: a housing with an accommodating space formed therein; the ring is fixed in the accommodating space of the housing. The curtain as described in any one of Claims 1 to 7 further includes: a housing with an accommodating space formed therein; an inner ring member disposed in the accommodating space of the housing and unable to rotate; the ring body A number of rolling elements are pivoted on the inner peripheral surface of the inner ring, the ring is sleeved on the inner ring, and the moving rolling element contacts the outer peripheral surface of the inner ring; the ring, the rolling elements and the inner ring form a single towards the bearing.

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