Pull rope assembly and blinds

Abstract

The present invention discloses a pull rope assembly and a venetian blind, and relates to the technical field of building doors and windows, including a hollow glass window, an inner cavity of the hollow glass window is provided with a venetian blind, a lower beam is provided at the bottom of the venetian blind, a rope unit is connected to the middle of the lower beam, the other end of the rope unit is wound and connected to a winding disk located below the hollow glass window, a driving turntable unit that is magnetically adsorbed to the winding disk is rotatably installed outside the hollow glass window, the winding disk can rotate synchronously with the rotation of the driving turntable unit, and when the winding disk is wound and rotated, the lower beam lifts, folds and moves the venetian blind upward. The present invention can achieve that a user only needs to control the rotation state of the driving turntable unit at the same position of the hollow glass window, thereby reducing the movement range of the user's hand on the window when adjusting the venetian blind, and is also convenient for application to hollow glass windows of different specifications and sizes.

Description

Technical Field

[0001] The invention relates to the technical field of building doors and windows, and in particular to a pull cord assembly and a shutter. Background Art

[0002] Venetian blinds are a common window decoration and sunshade method. In a hollow glass window, the venetian blinds are usually arranged in the inner cavity of the hollow glass window. The opening and closing of the venetian blinds are controlled by a corresponding pull cord assembly. The folding of the venetian blinds is achieved by pulling the rope body. The longer the pulling distance of the rope body, the greater the folding degree. It is common to set a remote control motor at the pulling end of the pull cord assembly, or set a magnetic block assembly at the pulling end of the pull cord assembly that can be magnetically connected to the outside;

[0003] For example, the Chinese patent publication number is: CN111794664B, the name of the patent is "hollow glass shutter", and the patent includes "including a window frame, a plurality of shutters arranged in the window frame, a counterweight plate is connected below the shutter at the bottom, two adjacent shutters are connected by a connecting rope, the shutter at the bottom is connected to the counterweight plate by a connecting rope, a traction rope for pulling the shutter is provided in the window frame, the traction rope passes through the plurality of shutters and is connected to the counterweight plate, cavities are provided in the window frame at both ends of the shutter, a controller for controlling the movement of the traction rope is provided in the cavity, and an adjustment cavity is provided in the window frame below the shutter, and the adjustment cavity is connected to the cavity";

[0004] The existing Venetian blinds pull cord assembly is located in the inner cavity of the hollow glass window. One end of the pull cord of the pull cord assembly is connected to the bottom rail at the lowest end of the Venetian blinds. The other end of the pull cord is fixed with an inner magnetic component or an iron block component. The inner magnetic component can be adsorbed by the external magnet outside the hollow glass window, and the inner magnetic block can move synchronously with the external magnet, so that the Venetian blinds can be folded by pulling the cord body.

[0005] However, the shortcoming of the existing solution is that when the blinds need to be fully folded, the required moving distance of the external magnet is close to the entire window height. When the height of the window sash exceeds the reach of an ordinary person's arm, the above solution is difficult to apply. Therefore, in order to solve the above problem, we propose a pull cord assembly and a blind. Summary of the invention

[0006] The object of the present invention is to provide a pull cord assembly and a blind to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A pull rope assembly comprises a hollow glass window, wherein the inner cavity of the hollow glass window is provided with a venetian blind, a lower beam is provided at the bottom of the venetian blind, a rope unit is connected to the middle of the lower beam, the other end of the rope unit is wound and connected to a winding disk located below the hollow glass window, a driving turntable unit magnetically adsorbed to the winding disk is rotatably installed outside the hollow glass window, the winding disk can rotate synchronously with the rotation of the driving turntable unit, and when the winding disk rotates to wind up, the lower beam lifts, folds and moves the venetian blind upward.

[0009] Preferably, the rope unit includes a first connecting rope connected to the lower beam, and the rope unit also includes a second connecting rope connected to the winding drum, and the first connecting rope and the second connecting rope are connected via a bridging unit.

[0010] Preferably, the bridging unit includes a sliding block on which a rotating wheel is rotatably mounted, a pulley is connected between the rotating wheel and the first connecting rope, one end of the first connecting rope away from the lower beam is fixed to the hollow glass window, and the bottom end of the sliding block is connected to the second connecting rope.

[0011] Preferably, a sprocket is rotatably mounted on the sliding block, a counterweight chain is adapted to be transmitted on the sprocket, a magnetic sheet is fixed on the frame surface of the hollow glass window, and the counterweight chain can be fixed by adsorption to the magnetic sheet.

[0012] Preferably, a first fixed pulley and a second fixed pulley, both connected to the first connecting rope pulley, are rotatably installed above the inner cavity of the hollow glass window, the area between the first fixed pulley and the second fixed pulley constitutes a drooping area, and a beam shaft connected to the ladder rope of a venetian blind is rotatably installed above the inner cavity of the hollow glass window, a gear located in the drooping area is fixed on the beam shaft, a counterweight rack is meshed on one side of the gear, and a through hole is opened on the side of the counterweight rack for the first connecting rope to pass through.

[0013] Preferably, a plug-in hole is provided at the bottom of the counterweight rack, the plug-in hole is communicated with the through hole, and a guide rod fixed to the bottom wall of the inner cavity above the hollow glass window is adapted to be plugged into the plug-in hole.

[0014] Preferably, a shaft rod is fixedly passed through the disk body of the winding disk, the shaft rod is rotatably connected in the hollow glass window, and a ferromagnetic metal disk is fixed on the disk body of the winding disk.

[0015] Preferably, the second connecting rope is a ferromagnetic metal chain.

[0016] Preferably, the driving turntable unit comprises a magnet cake outside the insulating glass window, the outer movability of the magnet cake is adapted with a limiting ring, and the limiting ring is fixed outside the insulating glass window.

[0017] Preferably, a Venetian blind is provided with the above-mentioned pull cord assembly.

[0018] In the above technical scheme, a pull rope assembly provided by the present invention is achieved by arranging a winding disk in the hollow glass window body, the winding disk is connected to the lower beam below the blinds through a rope unit, and the winding disk can be driven by a driving turntable unit located outside the hollow glass window body to rotate, thereby achieving that the user only needs to control the rotation state of the driving turntable unit at the same position of the hollow glass window body to control the retracted and extended state of the blinds, reducing the movement range of the user's hand on the window body when adjusting the blinds, and also facilitating application to hollow glass windows of different specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a front cross-sectional schematic diagram of a pull cord assembly in a hollow glass window according to the present invention;

[0021] Figure 2 It is a schematic diagram of a pull cord assembly of the present invention in a state where the blinds are folded;

[0022] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle;

[0024] Figure 5 It is a schematic diagram of a counterweight chain of a pull rope assembly of the present invention;

[0025] Figure 6 A side cross-sectional view of a counterweight rack of a pull rope assembly of the present invention at the top of a hollow glass window;

[0026] Figure 7 It is a side cross-sectional schematic diagram of a driving turntable unit of a pull rope assembly of the present invention;

[0027] Figure 8 This is a front schematic diagram of a pull cord assembly in a hollow glass window according to the present invention;

[0028] Fig. 9It is a schematic diagram of the transmission connection between the first connecting rope and the beam shaft rod in another embodiment of a pull rope assembly of the present invention;

[0029] Fig.10 It is a cross-sectional schematic diagram of an annular groove of a pull rope assembly of the present invention;

[0030] Fig.11 This is a schematic diagram of a first connecting rope of a pull rope assembly of the present invention in an annular groove.

[0031] Description of reference numerals:

[0032] 1. Hollow glass window; 1.1. First fixed pulley; 1.2. Second fixed pulley; 2. Venetian blind; 3. Lower beam; 4. Rope unit; 4.1. First connecting rope; 4.2. Second connecting rope; 5. Winding disk; 5.1. Shaft; 5.2. Ferromagnetic metal disk; 6. Driving turntable unit; 6.1. Magnet; 6.2. Limiting ring; 6.3. Mounting ring; 6.4. Ball; 7. Bridge unit; 7.1. Sliding block; 7.2. Rotating wheel; 7.3, sprocket; 7.4, counterweight chain; 7.41, chain; 7.42, counterweight block; 7.5, magnetic sheet; 8, beam shaft; 9, gear; 10, counterweight rack; 11, through hole; 12, plug-in hole; 13, guide rod; 14, supporting plate; 15, rectangular groove; 16, worm wheel; 17, worm; 18, first sleeve; 19, second sleeve; 20, long strip mouth; 21, annular groove; 22, tooth groove; 23, bump block. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1-11 A pull rope assembly provided by an embodiment of the present invention comprises a hollow glass window 1, an inner cavity of the hollow glass window 1 is provided with a venetian blind 2, a lower beam 3 is provided at the bottom of the venetian blind 2, a rope unit 4 is connected to the middle of the lower beam 3, the other end of the rope unit 4 is wound and connected to a winding disk 5 located below the hollow glass window 1, and a driving turntable unit 6 magnetically adsorbed with the winding disk 5 is rotatably installed outside the hollow glass window 1, and the winding disk 5 can rotate synchronously with the rotation of the driving turntable unit 6, and when the winding disk 5 rotates to rewind, the lower beam 3 lifts and folds the venetian blind 2 and moves upward;

[0035] Specifically, the hollow glass window 1 is composed of a window frame and at least two glass plates, and the cavity of the hollow glass window 1 is formed between the window frame and the two glass plates. The blinds 2, the lower beam 3, the rope unit 4, the driving turntable unit 6, and the winding disk 5 are all in the cavity. A continuously formed rectangular groove 15 is opened on the entire circumferential inner wall surface of the window frame. The groove space of the rectangular groove 15 can accommodate the placement and installation of the rope unit 4 and the winding disk 5. Both ends of the lower beam 3 extend into the groove body of the corresponding rectangular groove. The blinds 2 and the lower beam 3 have the same structure and relative installation position and method as those in the prior art, and will not be repeated. When the winding disk 5 rotates, the rope unit 4 can generate a pulling force in the vertical direction on the lower beam 3;

[0036] When the shutter 2 needs to be folded, the reel 5 is rotated by controlling the driving turntable unit 6 outside the hollow glass window 1, for example; when the reel 5 rotates forward, the lower beam 3 moves upward to lift and fold the shutter 2 under the transmission action of the rope unit 4; when the reel 5 rotates reversely, the lower beam 3 moves downward to release and unfold the shutter 2 under the transmission action of the rope unit 4. During the whole process, the user only needs to control the rotation state of the driving turntable unit at the same position of the hollow glass window to control the retracted and extended state of the shutter, thereby reducing the movement range of the user's hand on the window when adjusting the shutter, and facilitating application on hollow glass windows of different specifications and sizes.

[0037] In another embodiment provided by the present invention, the rope unit 4 includes a first connecting rope 4.1 connected to the lower beam 3, the first connecting rope 4.1 can be movably passed through the reserved holes on each louver bar on the louver curtain 2, the bottom end of the first connecting rope 4.1 is fixed to the midpoint of the lower beam 3, the rope unit 4 also includes a second connecting rope 4.2 connected to the winding drum 5, and the first connecting rope 4.1 and the second connecting rope 4.2 are connected by a bridge unit 7;

[0038] Wherein, the bridging unit 7 comprises a sliding block 7.1, which moves vertically on the vertical window frame of the hollow glass window body 1. Preferably, a track groove is provided in the rectangular groove on the window frame, and the sliding block 7.1 can slide vertically on the track groove. A rotating wheel 7.2 is rotatably installed on the sliding block 7.1. The rotating wheel 7.2 is pulley-connected with the first connecting rope 4.1. An annular groove matching the first connecting rope 4.1 is provided on the circumference of the wheel body of the rotating wheel 7.2. The pulley connection means that the first connecting rope 4.1 is clamped with the rotating wheel 7.2 on the circumference of the wheel body. The rotating wheel 7.2 can roll relatively on the first connecting rope 4.1. The end of the first connecting rope 4.1 away from the lower beam 3 is fixed to the hollow glass window body 1, and the bottom end of the sliding block 7.1 is connected to the second connecting rope 4.2.

[0039] In actual use, when the winding disk 5 rotates forward, the second connecting rope 4.2 pulls the sliding block 7.1 downward, and the rotating wheel 7.2 generates a downward pulling force on the first connecting rope 4.1. At the same time, the rotating wheel 7.2 rolls on the first connecting rope 4.1, so that the first connecting rope 4.1 is pulled downward by the rotating wheel 7.2, so that the lower beam 3 lifts and folds the blind 2 and moves upward, that is, when the sliding block 7.1 moves downward by one unit, the lower beam 3 moves upward by two units, and the sliding block 7.1 moves upward by one unit. The lower beam 3 moves down a distance of two units, thereby greatly reducing the number of revolutions required for the winding disk 5 and saving operation time. In other words, under normal circumstances, the number of revolutions required for the winding disk 5 to switch from a fully extended state to a fully folded state is N, and the first connecting rope 4.1 is connected to the second connecting rope 4.2 by a bridging unit 7, so that the number of revolutions required for the winding disk to switch from a fully extended state to a fully folded state is only N / 2, and the number of revolutions required for the winding disk 5 is reduced by half, so that the winding and unfolding states of the venetian blind can be quickly operated.

[0040] In another embodiment provided by the present invention, a sprocket 7.3 is rotatably mounted on the sliding block 7.1, and a counterweight chain 7.4 is adapted to be driven on the sprocket 7.3. Preferably, the counterweight chain 7.4 includes a chain 7.41, and counterweight blocks 7.42 are evenly distributed and fixed on the chain rope 7.41. Preferably, the counterweight blocks 7.42 are evenly distributed on both sides of the chain 7.41. The counterweight blocks 7.42 are made of ferromagnetic metal, such as iron, iron-sodium alloy, iron-nickel alloy, etc., and the hollow glass window 1 is fixed with a frame surface. The magnetic sheet 7.5 is a long strip, and a plurality of slots that can mesh with the sprocket 7.3 are provided on the magnetic sheet 7.5. The length direction line of the magnetic sheet 7.5 is perpendicular to the horizontal plane. The counterweight chain 7.4 can be adsorbed and fixed to the magnetic sheet 7.5. The sprocket 7.3 can mesh with the counterweight chain 7.4 during the rotation process. The counterweight chain 7.4 is vertically linearly distributed on the magnetic sheet 7.5. The magnetic sheet 7.5 and the counterweight chain 7.4 are both located on the moving trajectory line of the sprocket 7.3.

[0041] In actual use, the sprocket 7.3 rotates synchronously with the movement of the slider 7.1. For example, when the slider 7.1 moves downward, the sprocket 7.3 rolls along the counterweight chain 7.4. At the same time, since the sprocket 7.3 is meshed with the counterweight chain 7.4, the counterweight chain 7.4 is transferred to the slider 7.1 as the sprocket 7.3 rotates. In other words, the sprocket 7.3 rotates as the slider 7.1 moves. During the rotation, the sprocket 7.3 transfers the counterweight chain 7.4 on the magnetic sheet 7.5 to the slider 7.1, so that the overall weight of the slider 7.1 is gradually increased, thereby reducing the winding resistance of the winding drum 5 when the winding drum 5 rotates forward, which is conducive to the normal rotation of the winding drum 5; similarly, when the slider 7.1 moves upward, the sprocket 7.3 transfers the counterweight chain 7.4 on the slider 7.1 to the magnetic sheet 7.5 during the rotation.

[0042] In another embodiment provided by the present invention, a first fixed pulley 1.1 and a second fixed pulley 1.2, both connected to a first connecting rope 4.1 pulley, are rotatably installed at the upper position of the inner cavity of the hollow glass window 1. The first fixed pulley 1.1 and the second fixed pulley 1.2 are both located at the upper position of the hollow glass window 1. The first fixed pulley 1.1 is located at the top position of the first connecting rope 4.1 that passes through the louver blades of the venetian blind 2. The second fixed pulley 1.2 is located at a corner position of the hollow glass window 1. The area between the first fixed pulley 1.1 and the second fixed pulley 1.2 constitutes a sagging area. The first connecting rope 4.1 located in the sagging area has a collapsed state and a stretched state. The hollow glass window 1 A beam shaft 8 connected to the ladder rope of the venetian blind 2 is rotatably installed above the cavity. The beam shaft 8 is connected to the ladder line at the top of the venetian blind 2 to provide a hanging structure for the suspension of the venetian blind 2. When the beam shaft 8 is axially deflected, the slats on the venetian blind 2 are deflected, thereby changing the light transmittance of the venetian blind 2. The specific connection method between the beam shaft 8 and the venetian blind 2 is the same as the prior art and is not repeated. It should be particularly noted that a gear 9 located in the sagging area is fixed to the beam shaft 8, and a counterweight rack 10 is meshed on one side of the gear 9. The length direction line of the counterweight rack 10 is perpendicular to the horizontal plane, and a through hole 11 is provided on the side of the counterweight rack 10 for the first connecting rope 4.1 to pass through;

[0043] The counterweight rack 10 has a plug-in hole 12 at the bottom thereof, the axis of which is perpendicular to the horizontal plane, the plug-in hole 12 is connected to the through hole 11, a guide rod 13 is inserted into the plug-in hole 12, a support plate 14 is fixed to the bottom of the guide rod 13, and the support plate 14 is fixed to the groove wall of the rectangular groove 15;

[0044] In actual use, when the venetian blind 2 is fully extended, the lower beam 3 is located at the bottom of the hollow glass window 1. When the transmittance of the venetian blind 2 needs to be adjusted, the reel 5 continues to rotate in the opposite direction, so that the lower beam 3 is supported by the bottom of the hollow glass window 1 and is not pulled by the first connecting rope 4.1. At the same time, the first connecting rope 4.1 located in the sagging area is in a collapsed state, and the counterweight rack 10 moves downward in the vertical direction, and the gear 9 of the counterweight rack 10 drives the beam shaft 8 to deflect, thereby changing the light transmittance of the venetian blind 2. The deflection angle of the louver, that is, when the lower beam 3 is supported by the bottom of the hollow glass window 1, the rotation angle of the winding disk 5 is controlled to control the collapse degree of the first connecting rope 4.1 in the sagging area, thereby controlling the movement of the counterweight rack 10 in the vertical direction, thereby realizing the control of the deflection angle of the louver of the louver 2. The whole process is simple to operate, and there is no need to set an additional control component for changing the deflection angle of the louver of the louver 2 outside the hollow glass window 1, which simplifies the outside of the hollow glass window 1.

[0045] In another embodiment provided by the present invention, a worm wheel 16 located in the sagging area is fixed on the beam shaft 8, a worm 17 is meshed on one side of the worm wheel 16, the length direction line of the worm 17 is perpendicular to the horizontal plane, the top of the worm 17 is movably sleeved with a first sleeve 18 fixed to the inner top wall of the rectangular groove 15, the bottom of the worm 17 is movably sleeved with a second sleeve 19, and symmetrical long strip openings 20 are opened on both sides of the first sleeve 18. The worm 17 can move vertically in a straight line in the vertical direction of the first sleeve 18 and the second sleeve 19, the axis lines of the first sleeve 18 and the second sleeve 19 are on the same straight line, and the bottom end of the second sleeve 19 is fixed to the support plate 14;

[0046] The worm 17 is located in the long strip opening 20, and an annular groove 21 is provided on the rod body. The groove body of the annular groove 21 is engaged with the first connecting rope 4.1. A plurality of evenly distributed tooth grooves 22 are provided on the groove side wall of the annular groove 21. Each tooth groove 22 forms an annular tooth surface on the annular groove 21. A plurality of evenly distributed convex blocks 23 are fixed on the first connecting rope 4.1. The convex block 23 can be selected as a rubber block or a knot formed by tying the first connecting rope 4.1. The convex block 23 can mesh and rotate with the annular tooth surface formed by each tooth groove 22 on the annular groove 21 when moving through the annular groove 21, thereby rotating the worm 17. When the worm 17 rotates, the worm wheel 16 deflects accordingly.

[0047] In actual use, when the first connecting rope 4.1 is transformed from a collapsed state to a stretched state, the worm 17 moves upward as the first connecting rope 4.1 is stretched under the clamping action of the annular groove 21, and the worm wheel 16 is deflected, thereby changing the deflection angle of the louver blades of the venetian blind 2. In addition, when the first connecting rope 4.1 moves in the annular groove 21, the first connecting rope 4.1 and the protrusion block 23 can mesh and rotate with the annular tooth surface formed by each tooth groove 22 on the annular groove 21, thereby causing the worm 17 to rotate. When the worm 17 rotates, the worm wheel 16 is deflected accordingly, which is beneficial to further ensure that the deflection angle of the louver blades of the venetian blind 2 can be controlled.

[0048] In another embodiment provided by the present invention, a shaft 5.1 is fixedly passed through the body of the winding drum 5, and the shaft 5.1 is rotatably connected in the hollow glass window 1, that is, rotatably mounted with the wall surface of the rectangular groove of the window frame, and a ferromagnetic metal disk 5.2 is fixed on the body of the winding drum 5. Further, the second connecting rope 4.2 is a ferromagnetic metal chain, and the ferromagnetic metal disk 5.2 and the ferromagnetic metal chain can be selected from pure iron, iron-sodium alloy, iron-nickel alloy, etc.

[0049] The driving turntable unit 6 includes a magnet cake 6.1 outside the hollow glass window 1, the magnet cake 6.1 is a round magnet block, the magnet cake 6.1 can be a neodymium magnet, a crank rod is installed on the magnet cake 6.1, the outer movably adaptable limit ring 6.2 of the magnet cake 6.1, the limit ring 6.2 can limit the magnet cake 6.1 outside the hollow glass window 1 without falling off, the magnet cake 6.1 can rotate in the limit ring 6.2, the limit ring 6.2 is fixed outside the hollow glass window 1, the magnet cake 6.1 is fixedly sleeved with a mounting ring 6.3 on the circumference of the cake body, and a plurality of balls 6.4 are movably installed on the ring body of the mounting ring 6.3, and the trajectory line of each ball 6.4 coincides with the contour line of the ring body of the limit ring 6.2;

[0050] In actual use, the magnet cake 6.1 is placed in the limiting ring 6.2, at which time the ball 6.4 contacts the ring body of the mounting ring 6.3, and the magnet cake 6.1 and the ferromagnetic metal disk 5.2 are magnetically attracted. At this time, the winding disk 5 rotates synchronously when the magnet cake 6.1 is rotated, and the ball 6.4 reduces the friction resistance when the magnet cake 6.1 rotates on the limiting ring 6.2. For example, when the magnet cake 6.1 rotates clockwise, the winding disk 5 rotates forward, and the second connecting rope 4.2 is wound on the winding disk 5. Since the second connecting rope 4.2 is a ferromagnetic metal chain, the magnetic attraction strength between the winding disk 5 and the magnet cake 6.1 is increased, which is conducive to increasing the magnetic torque between the winding disk 5 and the magnet cake 6.1.

[0051] In other words, the folding principle of the venetian blind 2 is that the rising lower beam 3 supports each suspended venetian blind. As the lower beam 3 rises, more venetian blinds are piled on the lower beam 3. At this time, the pulling force required to pull the first connecting rope 4.1 of the lower beam 3 gradually increases, thereby increasing the upper limit of the magnetic torque between the winding disk 5 and the magnet 6.1. However, the greater the magnetic torque between the winding disk 5 and the magnet 6.1, the greater the resistance of the magnet 6.1 when it rotates. Therefore, the increase or decrease of the winding amount of the second connecting rope 4.2 made of ferromagnetic metal on the winding disk 5 is synchronized with the increase or decrease of the venetian blinds on the lower beam 3. The more venetian blinds are on the lower beam 3, the more the winding disk 5 and the magnet cake 6.1 also increases, so that the magnetic torque force between the winding drum 5 and the magnet cake 6.1 can be automatically and synchronously controlled according to the actual lifting and lowering conditions of the lower beam 3. For example, when the lower beam 3 moves from the bottom of the insulating glass window 1 to the middle of the insulating glass window 1, the magnetic torque force between the winding drum 5 and the magnet cake 6.1 increases from 5 units to 8 units, and when the lower beam 3 moves from the middle of the insulating glass window 1 to the top of the insulating glass window 1, the magnetic torque force between the winding drum 5 and the magnet cake 6.1 increases from 8 units to 11 units, thereby reducing the total resistance of the shaft rod and the magnet cake 6.1 when the blinds 2 are retracted and extended.

[0052] In another embodiment provided by the present invention, a Venetian blind is provided with the above-mentioned pull rope assembly. During actual use, the winding disk 5 is controlled to rotate by driving the turntable unit 6, thereby controlling the lifting and lowering of the Venetian blind 2. In addition, the driving turntable unit 6 can also adjust the light transmittance of the Venetian blind 2 in the unfolded state. Moreover, during the lifting and lowering process of the entire lower beam 3, the length of the rope unit 4 wound by the driving turntable unit 6 is half of the folded length of the Venetian blind 2, and the pulling force exerted on the winding disk 5 during the winding process is in a state tending to a constant force, and the operation process is time-saving and labor-saving.

[0053] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pull cord assembly, comprising a hollow glass window (1), wherein a venetian blind (2) is arranged in the inner cavity of the hollow glass window (1), and a lower beam (3) is arranged at the bottom of the venetian blind (2), characterized in that: A rope unit (4) is connected to the middle of the lower beam (3), and the other end of the rope unit (4) is wound and connected to a winding disk (5) located below the hollow glass window (1). A driving turntable unit (6) magnetically adsorbed to the winding disk (5) is rotatably mounted outside the hollow glass window (1), and the winding disk (5) can rotate synchronously with the rotation of the driving turntable unit (6). When the winding disk (5) rotates to wind up, the lower beam (3) lifts, folds, and moves upward to lift the blind (2); The rope unit (4) comprises a first connecting rope (4.1) connected to the lower beam (3), and the rope unit (4) further comprises a second connecting rope (4.2) connected to the winding drum (5), and the first connecting rope (4.1) and the second connecting rope (4.2) are connected via a bridging unit (7); A first fixed pulley (1.1) and a second fixed pulley (1.2) are rotatably mounted above the inner cavity of the hollow glass window (1), both of which are connected to the pulley of the first connecting rope (4.1); the area between the first fixed pulley (1.1) and the second fixed pulley (1.2) constitutes a drooping area; a beam shaft (8) connected to the ladder rope of the venetian blind (2) is rotatably mounted above the inner cavity of the hollow glass window (1); a gear (9) located in the drooping area is fixed to the beam shaft (8); a counterweight rack (10) is meshed with one side of the gear (9); and a through hole (11) is provided on the side of the counterweight rack (10) for the first connecting rope (4.1) to movably pass through; The bottom of the counterweight rack (10) is provided with a plug-in hole (12), the plug-in hole (12) is connected to the through hole (11), and a guide rod (13) fixed to the bottom wall of the inner cavity above the hollow glass window (1) is adapted to be plugged into the plug-in hole (12).

2. A pull cord assembly according to claim 1, characterized in that: The bridging unit (7) comprises a sliding block (7.1), a rotating wheel (7.2) is rotatably mounted on the sliding block (7.1), the rotating wheel (7.2) is pulley-connected to a first connecting rope (4.1), one end of the first connecting rope (4.1) away from the lower beam (3) is fixed to the hollow glass window (1), and the bottom end of the sliding block (7.1) is connected to a second connecting rope (4.2).

3. A pull cord assembly according to claim 2, characterized in that: A sprocket (7.3) is rotatably mounted on the sliding block (7.1), a counterweight chain (7.4) is adapted to be driven on the sprocket (7.3), a magnetic sheet (7.5) is fixed on the frame surface of the hollow glass window (1), and the counterweight chain (7.4) can be adsorbed and fixed to the magnetic sheet (7.5).

4. A pull cord assembly according to claim 1, characterized in that: A shaft rod (5.1) is fixedly passed through the body of the winding reel (5), the shaft rod (5.1) is rotatably connected in the hollow glass window (1), and a ferromagnetic metal disk (5.2) is fixedly disposed on the body of the winding reel (5).

5. A pull cord assembly according to claim 1, characterized in that: The second connecting rope (4.2) is a ferromagnetic metal chain.

6. A pull cord assembly according to claim 1, characterized in that: The driving turntable unit (6) comprises a magnet cake (6.1) outside the insulating glass window (1), the outer movable adapter of the magnet cake (6.1) is provided with a limiting ring (6.2), and the limiting ring (6.2) is fixed outside the insulating glass window (1).

7. A shutter, characterized in that: The shutter is provided with a pull cord assembly according to any one of claims 1 to 6.

Images