WO2019223708A1

WO2019223708A1 - Roller blind that freely opens/closes up and down

Info

Publication number: WO2019223708A1
Application number: PCT/CN2019/087906
Authority: WO
Inventors: 张集文
Original assignee: Zhang Jiwen
Priority date: 2018-05-24
Filing date: 2019-05-22
Publication date: 2019-11-28
Also published as: CN108533162A; EP3825507A4; EP3825507B1; EP3825507A1; CN108533162B

Abstract

A roller blind that freely opens and closes up and down, which comprises a roller shaft, a drawing cord and a drawing device. An end part of the roller shaft is provided with a movable pulley (1), and the drawing cord comprises a lifting section (31) and a pull-down section (32) which are drawn by the drawing device to move synchronously; the lifting section (31) and the pull-down section (32) bypass the movable pulley (1) and then tension upward and downward respectively so as to keep the movable pulley (1) stable, such that the movable pulley (1) may rotate while lifting, thus achieving the free up and down opening and closing of the roller blind.

Description

Freely opening and closing roller shutter

Technical field

The present invention relates to a roller blind, and in particular to a roller shutter which can open and close freely up and down with more reliable operation.

Background technique

Roller curtains are easy to use, beautiful and elegant, and are widely used in home life and office. The current roll curtain type curtain is generally used in a manner that a roll is fixed on the upper end of a window, the roll is rotated, and the curtain is rolled or released. Such curtains are first opened from the lower part of the window, so that the upper part of the window is shaded and the lower part is lighted. When opened, the lower part of the window cannot block the view and the upper part cannot be lighted.

In actual life, private spaces such as rooms, reception rooms, bathrooms, school classrooms, and some office spaces often require the lower half of the window to block the view, and the upper half to use daylight. This requires a roll-up curtain. In order to block the line of sight or direct light in different places, sometimes it is necessary to block in the middle or upper part of the window. The ideal roller shutter function can open any size at any position.

For example, Chinese patent ZL201320482322.5 discloses a top-opening roller shutter. This patent connects the two ends of the reel to a movable pulley mechanism, which enables the traction rope to drive the reel to rotate while driving the pulley and the reel to move up and down. The speed at which the curtain is released or wound on the reel is similar, and the lower end of the curtain is kept basically stationary, thereby achieving a dynamic top-opening curtain effect. The patent also realizes that it can be blocked at any position of the window by setting a clutch mechanism between the movable pulley and the reel.

In order to further improve the design of this patent, Chinese patent ZL201620022532.X discloses a roll-up curtain that can be unfolded at any position, including a reel, a curtain, a movable pulley at both ends of the reel, and a traction rope. The two ends of the traction rope are connected respectively. Two motor-driven winders, by controlling the movement of the two motors, the curtain can be opened from top to bottom, or the expanded size of the curtain can be adjusted at any position, so that the curtain can be blocked at any position in the lower, middle or upper part of the window .

The roller blinds disclosed in the above patents rely on the reel's own gravity and the pulling rope's pulling force to drive the reel's rotation. If the reel's own gravity is not enough, it will be difficult for the reel to rotate when it is raised and lowered, thereby destroying the top-open effect. In addition, the roller blinds disclosed in the above patents rely on a winder to wind or loosen the traction rope to drive the reel. When the traction rope is released, the fall of the reel also depends on gravity, which makes the roller blind unsuitable for some need to tilt or For horizontal installation. At the same time, the setting of the winder takes up design space, which is not conducive to the optimization of the entire system.

Summary of the Invention

The invention provides a roller shutter which can be opened and closed freely up and down, so that the movement of the reel does not depend on its own gravity, so that the operation is more reliable, and it can be used in occasions that require tilting or horizontal installation.

The roller blind can be opened and closed freely, including a roller shaft, a traction rope and a traction device. The end of the roller shaft is provided with a movable pulley. The traction rope includes an upper lifting section and a lowering section which are moved synchronously by the traction device. After the and pull-down sections bypass the moving pulley, they are tightened up and down to keep the moving pulley stable.

The lifting section and the pull-down section may be a split structure. In this case, the traction device is a winder provided at one or both ends of the lifting section and the pull-down section. The winding device has a simple structure and can be driven by a motor or Manually driven, the lifting section and the pull-down section can be connected to the winder at only one end, or both ends can be connected. When the winding devices at both ends of the lifting section are retracted, the winding devices at both ends of the pulling section are put at the same speed. When the thread is being pulled, the moving pulley only moves up and down without rotation; and when the winder at one end of the lifting section closes and the winder at the other end releases the wire at the same speed, and the winder at both ends of the pull-down section moves in the opposite direction , The moving pulley only rotates without lifting; and when the winder at one end of the lifting section is stationary and the winder at the other end is unwinding or winding and the winding device at the lower section moves in the opposite direction, the moving pulley is lifting At the same time, it can rotate automatically to open or close the roller blind.

Preferably, the traction rope is a closed loop structure, and the up-and-down freely opening and closing roller blind includes a plurality of tensioning wheels for tensioning the traction rope, and at least one of the tensioning wheels is a traction wheel constituting the traction device. Compared with the split structure, the closed-loop structure adds a tensioning device, but the winder for retracting the traction rope is omitted, and the synchronous movement of the lifting section and the pulling-down section can be guaranteed.

More preferably, it includes two traction wheels, which respectively tow different ends of the upper section and the lower section. When the two traction wheels are towing both ends of the lifting section or the pulling section at the same speed, the movable pulley can be prevented from rotating, and only the lifting movement can be performed, so that the height of the roller blind can be adjusted.

Further preferably, the two traction wheels are respectively driven by two different motors.

The two traction wheels can also be provided with only one driving motor, which drives one of the traction wheels and the other traction wheel is driven by it. In order to achieve the above function, a clutch device is provided between the two traction wheels. The clutch device may be a gear set, which includes a medium gear. When the medium gear meshes with the other gears, the two traction wheels are linked, and when the medium gear is withdrawn, the two traction wheels are disconnected.

Further preferably, the two traction wheels are respectively driven by two sets of bead chains-sprocket wheels. The two traction wheels are each driven by a set of bead chains-sprocket wheels. By selecting different combinations of bead chains, the combination of movement modes between the two traction wheels is achieved, so that the curtain can switch between different movement modes.

Preferably, the traction rope is a bead chain or a timing belt.

Preferably, guide grooves are provided on both sides of the up-and-down freely opening and closing roller blind, and the traction device, the traction rope and the movable pulley are provided on the guide groove. The guide groove can restrict the lateral swing of the movable pulley, so that the roller blind has the function of resisting wind, and can realize the modularization of the device and facilitate the assembly.

Preferably, the traction rope and the traction device are symmetrically arranged, and the traction devices on both sides are coaxially connected, and the coaxial connection can transmit the driving force on one side to the other side, thereby ensuring synchronous movement of the traction ropes on both sides.

In the present invention, the traction rope is provided with a lifting section and a pull-down section. The lifting section and the pull-down section tension the moving pulley in two opposite directions to keep the balance. When the lifting section and the pulling section are moved synchronously by traction, the moving pulley Rotation can occur at the same time of lifting, so that under the condition of not relying on gravity, the reel can open or retract the curtain at the same time when lifting, so that the curtain can be opened and closed freely.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of Embodiment 1 of a roller blind according to the present invention.

FIG. 2 is a schematic structural view of a second embodiment of a roller blind according to the present invention.

FIG. 3 is a schematic structural diagram of a disconnected state of the roller blind clutch device shown in FIG. 2.

FIG. 4 is a schematic structural view of a combined state of the roller blind clutch device shown in FIG. 2.

FIG. 5 is a schematic structural view of another driving mode of the roller blind shown in FIG. 2.

FIG. 6 is a schematic diagram of the overall installation structure of the roller blind of the present invention; FIG.

FIG. 7 is a schematic structural diagram of a roller blind embodiment 5 of the present invention; FIG.

Among them, 1 is a movable pulley, 2 is a cord, 31 is a lifting section, 32 is a pull-down section, 33, 34 are connecting sections, 41, 42, 43, 44, 44 are winders, and 51, 52, 53, 54 are tensioners. Wheel, 6 is the counterweight, 7 is the gear, 8 is the guide slot, 91, 92 are the motor, 10 is the controller, 11 is the transmission rod, 12 is the fixed gear seat, 61, 62, 63, 64 are bead chains .

Detailed ways

Example 1

As shown in FIG. 1, a roller shutter that can be opened and closed freely includes a reel (not shown), a movable pulley 1, a traction rope, and a cord 2. The upper end of the cord 2 is fixed on the reel, and the lower end is a free end. Heavy piece 6.

The traction rope of the present invention includes a lifting section 31 and a pulling section 32. Both ends of the lifting section 31 are connected to the winder 41 and the winder 42. Both ends of the lower section are connected to the winder 43 and the winder 44. The lifting section 31 is tensioned upward after bypassing the movable pulley 1, and the pull-down section 32 tensions the movable pulley downward, so that the movable pulley 1 remains stable at all times.

When the winder 42 and the winder 44 are stationary, the winder 41 is released, and the winder 43 is wound, the winding axis moves downward and winds up the cord at the same time, thereby achieving the effect of opening the cord. When the winder 42 and the winder 44 are stationary, the winder 41 is wound, and the winder 43 is released, the winding axis moves upward and releases the cord at the same time, thereby achieving the effect of the cord closing upward.

When the winder 41 and the winder 42 are wound at the same time and the winder 43 and the winder 44 are released at the same time, the reel together with the cord rises as a whole; when the winder 41 and the winder 42 are released at the same time and the winder 43 is released When it is wound with 44 at the same time, the reel and the curtain are lowered as a whole, so that they can be blocked at any position of the window.

Example 2

As shown in FIG. 2, a roller shutter can be opened and closed freely, including a reel (not shown in the figure), a movable pulley 1 and a curtain fabric 2. The traction rope includes a lifting section 31 and a pull-down section 32 connected by connecting

sections

33 and 34. As a closed-loop structure, the tension is arranged on four tension wheels, wherein the tension wheel 51 and the tension wheel 52 are traction wheels, and they can be manually driven or driven by a motor. The traction rope can be various ropes with low elongation, or a bead chain, or a timing belt can be used. Of course, the tensioning pulley and the movable pulley also need to choose a structure matching the traction rope. When the traction rope is a bead chain, the tensioning pulley and the moving pulley are sprocket wheels; when the traction rope is a timing belt, the tensioning pulley and the moving pulley are timing belt pulleys.

The upper lifting section 31 of the traction rope is tensioned upwards around the movable pulley 1 and the lower section 32 is tensioned downwards around the movable pulley 2 to keep the movable pulley 1 stable. The upper end of the cord fabric 2 is fixed on the reel, and the lower end is provided with a weight 6.

As shown in FIG. 3, the movable pulley 1, the traction rope, and the tensioning pulley are provided with guide grooves 8. A tension gear 7 is provided on the tensioning pulley 52, and a fixed tooth base 12 is provided on the guide groove 8 and can be engaged with the medium gear 7. The tensioning wheel 51 and the tensioning wheel 52 are provided with coaxial ring gears, and the medium gear 7 always meshes with the ring gear on the tensioning wheel 52. When the tensioning wheel 52 is required to rotate, as shown in FIG. 4, the intermediate gear 7 is rotated around the axis of the tensioning wheel 52 to make it mesh with the ring gear on the tensioning wheel 51, and the tensioning wheel 51 drives the tensioning wheel 51. The tight wheel 52 rotates.

As shown in FIGS. 3 and 4, the manner in which the pull-up section 31 is wound around the tensioning wheel 52 is different from the manner adopted in FIG. 2. This connection method can be used to link the tensioning wheel 51 and the tensioning wheel 52 through the gear 7 to achieve traction. Both ends of the rope lifting section 31 move upward or downward simultaneously.

By manually or electrically driving the tensioning wheel 51 and engaging or disengaging the intermediary gear 7, the combined actions of the two traction wheels as described below can be achieved by rotation, stationary, and different rotation directions:

When the tensioning wheel 51 rotates clockwise, the intermediate gear 7 keeps disengaged from the ring gear on the tensioning wheel 51 and meshes with the fixed tooth base 12, so that the tensioning wheel 52 is stationary. Due to the traction of the tensioning wheel 51, the lifting The segment 31 is gradually extended, and the pull-down segment 32 is gradually shortened. The traction rope drives the pulley 1 to descend and rotates counterclockwise, and the curtain is rolled up, so that the roller curtain is opened from top to bottom to achieve a top-opening effect.

When the tensioning wheel 51 rotates counterclockwise, the medium gear 7 remains disengaged from the ring gear on the tensioning wheel 51 and meshes with the fixed tooth base 12, so that the tensioning wheel 52 is stationary. Due to the traction of the tensioning wheel 51, the lifting The section 31 is gradually shortened, and the pull-down section 32 is gradually extended. The traction rope drives the pulley 1 to rise at the same time and clockwise rotation occurs, and the curtain is released, thereby achieving the effect of closing the roller blind from bottom to top.

When the tensioning wheel 51 rotates counterclockwise, the intermediate gear 7 is disengaged from the fixed gear seat 12 and meshes with the ring gear on the tensioning wheel 51, and the tensioning wheel 52 is also rotated counterclockwise, as shown in FIG. 4. As the traction rope is reversely wound on the tensioning wheel 52, at this time both ends of the lifting section 31 of the traction rope are shortened at the same time, the movable pulley 1 rises but does not rotate, and the cord is hoisted as a whole. Otherwise, the curtain is lowered as a whole, so as to achieve the effect of covering the window at any position.

Example 3

As shown in FIG. 5, the arrangement of the reel (not shown in the figure), the guide groove 8, the movable pulley 1, the cord 2, the traction rope, and the fixed pulley is the same as that in the embodiment 2, without a gear and a fixed tooth seat. The tensioning wheel 51 and the tensioning wheel 52 are driven by a motor 91 and a motor 92, respectively. The motor 91 and the motor 92 are controlled by the controller 10. Through the controller 10, various programs can be set to control the rotation and stationary of the motor 91 and the motor 92, respectively. And different directions of rotation, so that the two traction wheels achieve the combined action as described in Embodiment 2, so that the curtain can be opened or closed or blocked at any position of the window.

By making the diameter of the movable pulley and the reel the same or similar, it can be ensured that the bottom end of the cord is always kept up and down or the motion is not obvious when the cord is opened or retracted.

Example 4

As shown in FIG. 6, guide grooves 8 are provided on both sides of the roller blind, and the traction rope, the movable pulley 1 and the tensioning pulley are all installed on the guide groove 8. The traction rope, the tensioning pulley, and the movable pulley on both sides of the roller blind are arranged symmetrically. The roller is arranged between the two movable pulleys 1 and the cord is wound on the roller. In order to achieve synchronous movement, the traction wheels on both sides are coaxially connected through the transmission rod 11, so that only the driving wheels on one side can be driven to realize the synchronous movement of the two moving pulleys.

The two ends of the weight 6 at the lower end of the cord 2 are connected to the corresponding positions of the pull-down section of the traction rope, which will not affect the retracting and lifting of the cord and the overall lifting. Therefore, the up-and-down freely opening and closing roller blind of the present invention can be applied to inclined or horizontal installation.

Example 5

As shown in FIG. 7, the tensioning wheel 51 and the tensioning wheel 52 are each independently manually driven by a group of bead chains and sprocket wheels. The closed-loop bead chain driving the tensioning wheel 52 freely sags into two sections of 61 and 62, and the closed-loop bead chain driving the tensioning wheel 51 freely sags into two sections of 63 and 64.

Pulling 61 downward, the tensioning wheel 51 rotates counterclockwise, the tensioning wheel 52 is stationary, the traction rope drives the pulley 1 to rise at the same time and clockwise rotation occurs, and the curtain is released, thereby achieving the effect of closing the roller blind from bottom to top. Conversely, when pulling down 62, the traction rope drives the pulley 1 to descend and rotate counterclockwise, and the curtain is rolled up, thereby achieving the effect of opening the curtain from the top to the bottom.

Pulling down 61 and 64 at the same time, the traction rope drives the pulley 1 to rise without rotation, and the whole cord rises. Conversely, if 62 and 63 are pulled downwards, the traction rope drives the pulley 1 to descend without rotation, and the cord as a whole is lowered.

Pulling 61 and 63 down at the same time, the traction rope drives the pulley 1 to stop lifting and rotates counterclockwise, and the reel can stay at any position and the curtain is released downward. Conversely, if 62 and 64 are pulled downwards, the traction rope drives the pulley 1 to stop lifting and rotate clockwise, and the reel can stay at any position and the cord is rolled up.

In this embodiment, two sets of manually driven bead chains and sprocket wheels are provided, and the movement between the two traction wheels is realized by selecting a combination of bead chains, so that the curtain can switch between different movement modes.

Claims

The roller blind can be opened and closed freely, including a roller, a traction rope, and a traction device. An end of the roller is provided with a movable pulley. The traction rope includes an upper lifting section and a lower section that are synchronously moved by the traction device. After the upper and lower sections bypass the moving pulley, they are tightened up and down to keep the moving pulley stable.
The roller shutter of free opening and closing as claimed in claim 1, wherein the traction device is a winder provided at one end or both ends of the lifting section and the lowering section.
The roller shutter with free-opening and closing as claimed in claim 1, wherein the traction rope is a closed loop structure, and the roller shutter includes a plurality of tensioning wheels for tensioning the traction rope, and at least one of the tensioning wheels is a component. The traction wheel of the traction device is described.
The roller shutter according to claim 3, comprising two traction wheels, the two traction wheels respectively towing different ends of the lifting section and the pull-down section.
The roller shutter according to claim 4, wherein the two traction wheels are driven by two different motors.
The up-and-down freely opening and closing roller blind according to claim 4, wherein a clutch device is provided between the two traction wheels.
The roller shutter with free-opening and closing according to claim 1, wherein the traction rope is a bead chain or a timing belt.
The roller shutter according to claim 1, wherein guide rollers are provided on both sides of the roller shutter, and the traction device, the traction rope, and the movable pulley are provided on the guide roller.
The roller shutter with free-opening and closing according to claim 1, wherein the traction rope and the traction device are symmetrically arranged, and the traction devices on both sides are coaxially connected.
The roller shutter according to claim 4, wherein the two traction wheels are respectively driven by two sets of bead chains and sprocket wheels.