CN107165568B - Curtain body drive mechanism for cordless curtains - Google Patents

Abstract

The invention provides a curtain body transmission mechanism of a curtain without a pull rope, which comprises a winding unit, a guide unit and two pull ropes, wherein the winding unit is provided with two spring coiling wheels and a coil spring for connecting the two spring coiling wheels, each spring coiling wheel is meshed with a rope pulling wheel, so that the rope pulling wheels can be driven by the winding unit to synchronously rotate, the guide units are respectively adjacent to one rope pulling wheel and respectively provided with a rotatable first roller, the pull ropes are respectively wound on the first rollers, one end of each pull rope is connected with the rope pulling wheel, and the other end of each pull rope is positioned outside a base. Therefore, in the process that the pulling rope is wound on the pulling rope wheel or released from the pulling rope wheel through the rotation of the pulling rope wheel, the stability and the smoothness of the whole transmission process can be improved by utilizing the rotation of the first roller.

Description

Curtain body drive mechanism for cordless curtains

technical field

The invention relates to cordless curtains, in particular to a curtain body transmission mechanism for cordless curtains.

Background technique

General curtains can be divided into rope-drawn type and non-drawer type in structure. The so-called rope-drawn curtain mainly uses a rope to drive the height of the curtain body to change, so as to achieve the effect of unfolding and folding, and there is no Drawstring curtains use the hand to push up or pull down the lower beam, so that the curtain body can be unfolded or folded.

Taiwan Announcement Patent No. 263877 and Taiwan Announcement Patent No. 322458 respectively improve the transmission mechanism used to drive the curtain body up and down, but the aforementioned two patents still cannot effectively reduce the structural complexity after the improvement, and also cannot provide the curtain body. Ideal transmission effect.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a curtain body transmission mechanism for a cordless curtain, which can simplify the structure and provide a good transmission effect.

In order to achieve the above objective, the curtain body transmission mechanism provided by the present invention includes a base, a winding unit, two pulleys, two guide units, and two pull ropes. The rewinding unit has two coil spring wheels and a coil spring, the two coil spring wheels are rotatably arranged on the base and are engaged with each other, the coil spring is connected to the two coil spring wheels and can be selectively wound around One of the coil spring pulleys; the pull rope pulley is rotatably arranged on the base and engages with one of the coil spring pulleys respectively, so that the pull pulley is driven by the retracting unit to rotate synchronously; the guide unit is adjacent to the A first roller is arranged on the rope pulley, the first roller is rotatably arranged on the base, and the axial direction of the first roller is parallel to the axial direction of the coil spring wheel and the The axial direction of the pulley; the pulley is wound around the first roller, and one end of the two pulleys is connected to a pulley and can be wound around the pulley or the pulley through the rotation of the pulley. Released from the pull rope wheel, the other ends of the two pull ropes are located outside the base for connecting the lower beam.

It can be seen from the above that in the process of unfolding a curtain body connected to the lower beam, the pulling rope drives the pulling rope wheel to rotate through the pulling of the lower beam, and then the pulling pulley rope drives the coil spring wheel that is engaged with it. Rotate together to make the coil spring accumulate elastic restoring force through the rotation of the two coil spring wheels, and release the pulling force on the lower beam until the curtain body is fully unfolded. The pushing force of the coil spring and the elastic restoring force of the coil spring, the coil spring wheel will drive the pull rope wheel that meshes with it to rotate together, so that the pull rope is gradually wound around the pull rope wheel until the curtain body is completely retracted. Release the thrust on the lower beam. However, no matter in the process of unfolding or folding, by using the rotation of the guiding unit, the pulling rope can move stably and smoothly, so that a good transmission effect can be achieved in the whole operation process.

Description of drawings

FIG. 1 is an external perspective view of the present invention.

FIG. 2 is a partial perspective exploded view of the present invention.

3 is a partial top view of the present invention, mainly showing that the first and second rollers are wound around the pull rope.

Fig. 4 is similar to Fig. 3 and mainly shows that the pull rope is wound around the first roller.

FIG. 5 is similar to FIG. 3 and mainly shows that the pull rope is wound around the first, second and third rollers.

FIG. 6 is a plan view of the present invention used with a curtain, mainly showing the state of the curtain body being unfolded.

Fig. 7 is similar to Fig. 6, and mainly shows the state of the folded curtain body.

Description of reference numerals

10 Curtain body transmission mechanism 12 Upper beam

14 lower beam 16 curtain body

20 base 21 base

22 top plate 23 opening

24 cross bar 30 winding unit

32 coil spring wheel 34 coil spring

36 first axle 40 pulley

42 second axle 50 guide unit

51 The first roller 52 The second roller

53 The third roller 54 The first shaft

55 The second shaft 56 The third shaft

60 drawstring

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

Please refer to FIGS. 1 and 2 first, the curtain body transmission mechanism 10 of the present invention includes a base 20 , a winding unit 30 , two pulleys 40 , two guide units 50 , and two pull ropes 60 .

The base 20 is installed in an upper beam 12 and has a bottom plate 21 and a top plate 22 covering the bottom plate 21 . In addition, two ends of the base 20 respectively have an opening 23 and a cross set in the opening 23 . The rod 24 and the cross rod 24 are fixed between the top and bottom plates 21 and 22 , and the center of the cross rod 24 corresponds to the center of the opening 23 .

The coiling unit 30 has two coil spring wheels 32 and a coil spring 34. The two coil spring wheels 32 are respectively pivoted to the base 20 through a first axle 36 and are engaged with each other. The coil spring 34 is connected to the two coil springs. The wheel 32 can be wound around one of the coil spring wheels 32 through the relative rotation of the two coil spring wheels 32 .

The rope pulley 40 is pivoted on the base 20 through a second axle 42 and engages with a coil spring wheel 32 respectively, so that the pull rope pulley 40 can be driven by the coil spring pulley 32 engaged with it to rotate synchronously.

The guide unit 50 is adjacent to the pulley 40 and has a first roller 51 , a second roller 52 , and a third roller 53 . The first roller 51 is pivoted on the The base 20 is located at a front side of the base 20 , the second roller 52 is pivoted to the base 20 through a second shaft 55 and is located at a rear side of the base 20 , and the third roller 53 passes through a The third shaft member 56 is pivotally mounted on the base 20 and arranged side by side with the second roller 52 . The first, second and third rollers 51 , 52 and 53 are all made of plastic material.

One end of the pulling rope 60 is fixed to the pulling wire wheel 40 , so that the pulling wire 60 can be wound around the pulling wire wheel 40 or released from the pulling wire wheel 40 through the rotation of the pulling wire wheel 40 . When passing through the guide unit 50, the pull cord 60 can be wound in different ways according to the different sizes of the curtains. If it is used with a small size curtain, as shown in FIG. 3, the pull cord 60 can be wound around the first roller 51 once. Afterwards, it passes through the opening 23 of the base 20 and goes out of the base 20 to connect with the lower beam 14. If it is used with a large-sized curtain, as shown in FIG. After the half-turn of the column 51 and the half-turn of the second roller 52, it is wound around the third roller 53 for one turn, and finally passes out of the base 20 through the opening 23 of the base 20. If it is used with ordinary size curtains, As shown in FIG. 4 , the pulling rope 60 can be wound around the first roller 51 and the second roller 52 half a turn in a reverse manner, and then pass through the opening 23 of the base 20 and pass out of the base 20 . . However, no matter what the winding method is, when the pulling rope 60 passes through the opening 23 of the base 20 , it will be pressed against the center of the cross bar 24 of the base 20 , so as to increase the movement stability.

It can be seen from the above structure that when a curtain body 16 between the upper and lower beams 12 and 14 is to be unfolded, the lower beam 14 is first pulled down by applying force, so that the pull rope 60 is pulled by the lower beam 14 to drive the pull rope The pulley 40 rotates, and then during the rotation of the rope pulley 40, it will drive the coil spring wheel 32 meshing with it to rotate together, so that the coil spring 34 accumulates elastic restoring force through the relative rotation of the two coil spring wheels 32 until the After the curtain body 16 is fully unfolded, the pulling force on the lower beam 14 is released. At this time, there will be a static balance between the weight of the lower beam 14 and the elastic force of the coil spring 34, so that the curtain body 16 can remain in the unfolded state.

When the curtain body 16 is to be folded, the user needs to exert force to push the lower beam 14 upward, and the elastic restoring force of the coil spring 34 is sufficient to drive the two coil spring wheels 32 to rotate in the opposite direction at the same time with the assistance of the user's pushing force. In the process of reverse rotation, the wheel 32 will drive the rope pulley 40 meshed with it to rotate, and then the rope pulley 40 will start to wind up the rope 60 when it rotates, until the curtain body 16 is completely retracted, use Then, the pushing force applied to the lower beam 14 is released, and the weight of the lower beam 14 and the elastic force of the coil spring 34 will again exhibit a static balance, so that the curtain body 16 is kept in a collapsed state.

The rollers 51 , 52 , and 53 in the guide unit 50 that are wound by the pull cord 60 can be pulled by the frictional force with the pull cord 60 no matter in the process of unfolding the curtain body 16 or collapsing the curtain body 16 . The actuation of the rope 60 is rotated, so that the stability and smoothness of the actuation of the pull rope 60 can be increased, so that a good transmission effect can be achieved in the overall operation process.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in further detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (3)

1. A curtain body transmission mechanism of a cordless curtain is characterized in that, comprising: a base; A coiling unit has two coil spring wheels and a coil spring, the two coil spring wheels are rotatably arranged on the base and meshed with each other, the coil spring is connected to the two coil spring wheels and can be selectively coiled in one of the coil spring wheels; Two pull rope pulleys, the two pull rope pulleys are rotatably arranged on the base and respectively engage with one of the coil spring pulleys; Two guiding units are respectively disposed adjacent to a pulley wheel and respectively have a first roller rotatably disposed on the base, the axial direction of the first roller is parallel to the axial direction of the coil spring wheel and the the axial direction of the pulley; and Two pull ropes are respectively wound around the first roller, one end of the two pull ropes is connected to a pull pulley and can be wound around the pull pulley or from the pull pulley through the rotation of the pull pulley Released, the other ends of the two pull ropes are located outside the base; Each of the guide units also has a second roller, the second roller is rotatably arranged on the base and is located on two opposite sides of the base respectively with the first roller, and the pull rope is wound around the base. The first roller half-circle is wound around the second roller half-circle. 2 . The curtain body transmission mechanism for cordless curtains according to claim 1 , wherein each of the guiding units further has a third roller, and the second and third rollers are respectively rotatable and mutually rotatable. 3 . It is arranged on the base side by side and is located on two opposite sides of the base respectively with the first roller, and the pulling rope is wound around the third roller once. 3 . The curtain body transmission mechanism for cordless curtains as claimed in claim 1 , wherein both ends of the base have an opening and a cross bar disposed in the opening respectively, and the center of the cross bar corresponds to the center of the cross bar. 4 . In the center of the opening, the pulling rope is pressed against the center of the cross bar and protrudes out of the base through the opening.

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