Double-counterweight shutter

Abstract

The invention relates to the technical field of building decoration, and provides a double-balance-weight shutter which comprises a window frame, blades and a winding and unwinding roller, the multiple blades are installed in the window frame, the winding and unwinding roller is rotationally connected into the window frame, the winding and unwinding roller is connected with a winding and unwinding rope, and the winding and unwinding rope is sequentially connected with all the blades in series; the window frame is rotationally connected with a driven roller, two driving ropes are wound between the winding and unwinding roller and the driven roller, and the two driving ropes are symmetrically distributed on the two sides of the blade; each driving rope is connected with a driving block, the driving blocks are installed in the window frame in a sliding mode, each driving block is connected with a balancing weight, when the driving blocks are driven to ascend and descend, the driving ropes drive the winding and unwinding roller and the driven roller to rotate synchronously, and the window frame is provided with a driving piece used for driving the driving blocks to ascend and descend. According to the double-balance-weight louver, opening and closing of the louver can be facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of building decoration, and in particular to a double-weighted shutter. Background Art

[0002] Shutters are a type of window that consists of many horizontal or vertical blades that can be rotated or slid to adjust light and sight. Shutters can be used indoors or outdoors to provide privacy control, light regulation, and visual effects. On a technical level, the design and manufacture of shutters involves many aspects such as material selection, structural design, and operating mechanisms to ensure durability, ease of use, and aesthetics.

[0003] In the prior art, a Venetian blind includes a window frame, blades, and a retractable roller. A plurality of blades are installed in the window frame. The retractable roller is rotatably connected to the window frame. The retractable roller is provided with a retractable rope. The retractable rope is connected in series with all the blades in sequence. By driving the retractable roller to rotate, the retractable rope can lift or lower all the blades to realize the opening and closing of the Venetian blind, thereby adjusting the indoor light.

[0004] However, when the retractable rollers of such blinds are manually driven, for larger blinds, due to the weight of the blades, the opening of the blinds requires the operator to exert a certain amount of force to overcome the weight of the blades in order to drive the retractable rollers to rotate, which is rather laborious and thus requires further improvement. Summary of the invention

[0005] In order to facilitate the opening and closing of the blinds, the present application provides a double-weighted blinds.

[0006] The double-weighted shutter provided in this application adopts the following technical solution: A double-counterweight shutter comprises a window frame, blades and a retractable roller, wherein the blades are installed in the window frame and a plurality of blades are provided, the retractable roller is rotatably connected to the window frame, the retractable roller is connected to a retractable rope, and the retractable rope is sequentially connected in series to all the blades; the window frame is rotatably connected to a driven roller, two driving ropes are wound between the retractable roller and the driven roller, and the two driving ropes are symmetrically distributed on both sides of the blade; each of the driving ropes is connected to a driving block, and the driving block is slidably installed in the window frame, and each of the driving blocks is connected to a counterweight block, and when the driving block is driven to rise and fall, the driving rope drives the retractable roller and the driven roller to rotate synchronously, and the window frame is provided with a driving member for driving the driving block to rise and fall.

[0007] By adopting the above-mentioned technical scheme, a counterweight block with a certain weight is set on the driving block through the setting of the counterweight block. When the shutter is switched from an open state to a closed state, the driving block forces the retracting roller to rotate, and the blades can switch from an open state to a closed state under their own weight; when the shutter is switched from a closed state to an open state, the counterweight block can balance the weight of the blades, so that the operator can use less force to drive the driving block to rise and fall, thereby making the shutter more stable and smooth when in use; on the other hand, by setting two counterweight blocks, the counterweight is divided into two, so that the counterweight block can be prepared in a smaller size, reducing the space occupancy rate of a single counterweight block inside the window frame.

[0008] Optionally, a guide wheel located on one side of the retracting roller is slidably installed in the window frame, and the end of the retracting rope away from the blade is wound around the guide wheel and connected to the retracting roller; a moving part is provided between the guide wheel and the retracting roller, and when the retracting roller rotates, the moving part drives the guide wheel to slide back and forth along the axial direction of the retracting roller.

[0009] By adopting the above-mentioned technical solution, through the arrangement of the guide wheel and the moving part, when the driving block is lifted and lowered to drive the retracting roller to rotate, the guide wheel slides back and forth along the axial direction of the retracting roller under the action of the moving part, thereby guiding the retracting rope, so that the retracting rope can be wound sequentially along the length direction of the retracting roller, reducing the possibility of the retracting rope being wound into a ball on the outer peripheral wall of the retracting roller and causing the retracting rope to be entangled with each other.

[0010] Optionally, a mounting seat is provided in the window frame, and the mounting seat is provided with a through hole for the retractable roller to pass through; the mounting seat is provided with a clamping component for clamping and fixing the retractable roller.

[0011] By adopting the above-mentioned technical solution and setting up the clamping assembly, when the blades of the shutter are in the open state, the deadweight of the blades reacts on the retracting roller, so that the retracting roller has a rotational force. This rotational force acts on the drive rope for a long time, which can easily cause irreversible deformation or breakage of the drive rope. When the blades are in the open state, the retracting roller can be clamped and fixed by the clamping assembly to offset part of the rotational force from the blades on the retracting roller, thereby increasing the service life of the drive rope.

[0012] Optionally, the clamping assembly includes a rotating ring, a clamping slider, a linkage and a rotating member. The rotating ring is rotatably mounted on a mounting seat and is coaxially arranged with the mounting seat. The clamping slider is slidably mounted on a surface of the mounting seat close to the rotating ring, and a plurality of clamping sliders are arranged around the central axis of the rotating ring. The plurality of clamping sliders are combined to form a passage for the retracting and releasing roller to pass through. The linkage is arranged between the rotating ring and the plurality of clamping sliders. When the rotating ring rotates, the linkage drives all the clamping sliders to move synchronously to expand or reduce the passage. The rotating member is arranged on the rotating ring to drive the rotating ring to rotate.

[0013] By adopting the above-mentioned technical scheme, through the arrangement of the rotating ring, the clamping slider, the linkage and the rotating member, when the blade is in the open state, the rotating ring is driven to rotate by the rotating member, and the rotating ring drives all the clamping sliders to slide synchronously under the action of the linkage member to narrow the penetration channel, so that multiple clamping sliders are clamped on the peripheral wall of the retracting roller at the same time, offsetting part of the rotational force from the blade on the retracting roller, and improving the service life of the driving rope; when it is necessary to lift or lower the blade, the rotating ring is driven to reverse, so that all the clamping sliders can be driven to separate from the peripheral wall of the retracting roller, thereby improving the operational convenience of the overall structure.

[0014] Optionally, each of the clamping sliders has a first abutment surface and a second abutment surface, and the first abutment surface and the second abutment surface of the clamping slider are vertically arranged; the first abutment surface of the clamping slider is used to abut against the peripheral wall of the receiving and releasing roller, and the first abutment surfaces of two adjacent clamping sliders are vertically arranged, and the second abutment surface of the clamping slider abuts against the first abutment surface of the adjacent clamping slider.

[0015] By adopting the above-mentioned technical solution, through the setting of the first abutment surface and the second abutment surface, all the clamping sliders are driven to move synchronously, so that the first abutment surfaces of all the clamping sliders are simultaneously pressed against the peripheral wall of the retracting roller to clamp and fix the retracting roller; the rotational force of the retracting roller reacts on the clamping slider to form a driving force on the clamping slider, and this driving force is transmitted to the adjacent clamping slider through the second abutment surface, thereby consuming part of the driving force and improving the clamping effect on the retracting roller.

[0016] Optionally, a sliding groove is provided on the surface of each of the clamping sliders, and the length directions of the sliding grooves of two adjacent clamping sliders are arranged vertically; a plurality of guide columns are arranged in the sliding groove, one end of the guide column is rotatably connected to the surface of the mounting seat, and the other end is inserted into the sliding groove, and each of the clamping sliders is slidably installed on the surface of the mounting seat through the corresponding plurality of guide columns.

[0017] By adopting the above-mentioned technical scheme, through the setting of the sliding groove and the guide column, and the cooperation of the sliding groove and the guide column, the clamping slider is slidably installed on the surface of the mounting seat; in addition, the guide column and the mounting seat are rotatably connected, so that when the clamping slider is displaced, the guide column can rotate around its own central axis, thereby reducing the friction between the clamping slider and the guide column, thereby improving the sliding smoothness of the clamping slider.

[0018] Optionally, the linkage part includes a linkage gear ring, a linkage rack and a linkage gear, the linkage gear ring is coaxially arranged on the inner circumferential wall of the rotating ring, the number of the linkage racks is arranged corresponding to the number of clamping sliders, each of the linkage racks is connected to the corresponding clamping slider, and both ends of the linkage racks are extended along the displacement direction of the corresponding clamping slider; the linkage gear is rotatably connected to the surface of the mounting seat, the number of the linkage gears is arranged corresponding to the number of linkage racks, and each of the linkage gears is meshed with the linkage gear ring and the corresponding linkage rack.

[0019] By adopting the above technical solution, through the linkage gear ring, linkage rack and linkage gear, when the rotating ring rotates, each clamping slider can be displaced under the action of its corresponding linkage rack and linkage gear to expand or reduce the penetration channel.

[0020] Optionally, the first abutment surface of each of the clamping sliders is connected to a pushing block, and a plurality of pushing grooves are provided on the peripheral wall of the retracting roller. The plurality of pushing grooves are arranged at intervals around the central axis of the retracting roller, and each of the pushing grooves has a third abutment surface for the pushing block to abut. When the clamping slider drives the pushing block to be inserted into the pushing groove and the third abutment surface of the pushing groove abuts against the pushing block, the third abutment surface of the pushing groove is perpendicular to the first abutment surface of the corresponding clamping slider.

[0021] By adopting the above-mentioned technical scheme, through the setting of the pushing block and the pushing groove, the first abutting surface of the clamping slider is driven to abut against the peripheral wall of the retracting roller, and then the pushing block is inserted into the pushing groove, thereby stopping the rotation of the retracting roller and reducing the possibility of free rotation of the retracting roller; in addition, the third abutting surface of the pushing groove is perpendicular to the first abutting surface of the corresponding clamping slider, so that the retracting roller is subjected to the rotational force from the blade and is transmitted to the corresponding clamping slider through the third abutting surface to form a driving force for the clamping slider, and this driving force can act vertically on the adjacent clamping slider to consume the driving force of the retracting roller and improve the clamping effect on the retracting roller.

[0022] Optionally, the mounting seat is slidably installed with a clamping column for clamping the end face of the retracting roller, and a reset spring is provided between the clamping column and the mounting seat, and the reset spring normally causes the clamping column to separate from the end face of the retracting roller; the clamping slider is provided with a pushing member, and when the first abutting surface of the clamping slider is pressed against the peripheral wall of the retracting roller, the pushing member drives the clamping column to press against the end face of the retracting roller.

[0023] By adopting the above-mentioned technical scheme, through the arrangement of the clamping column and the pushing member, when the blade is in the open state, the surrounding wall of the retracting roller is clamped and fixed by the clamping slider. During the movement of the clamping slider, the clamping column is driven by the pushing member to press against the end face of the retracting roller. The cooperation between the clamping column and the clamping slider improves the fixing effect of the retracting roller, thereby reducing the possibility that the steering force of the blade on the retracting roller acts on the drive rope for a long time, causing irreversible deformation of the drive rope.

[0024] Optionally, a guide groove is provided on the peripheral wall of the clamping column, and the guide groove has a guide surface; the pushing member includes a plurality of pushing blocks, and the plurality of pushing blocks are arranged corresponding to a plurality of clamping sliders, and each of the pushing blocks is connected to a corresponding clamping slider, and when the first abutting surface of the clamping slider is pressed against the peripheral wall of the retracting roller, the clamping slider drives the corresponding pushing block to insert into the guide groove, and pushes the clamping column to press against the end face of the retracting roller through the guide surface.

[0025] By adopting the above-mentioned technical solution, through the setting of the pushing block and the guide surface, in the process of the clamping slider moving to reduce the penetration channel, the pushing block can be driven to move synchronously, so that the pushing block is inserted into the guide groove, and the guide surface of the guide groove is used to push the clamping column, so that the clamping column can be clamped against the end face of the retracting rope, thereby improving the fixing effect of the retracting roller.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting a counterweight block, a counterweight block with a certain weight is set on the driving block. When the blinds are switched from an open state to a closed state, the driving block forces the retracting roller to rotate, and the blades can be switched from an open state to a closed state under their own weight; when the blinds are switched from a closed state to an open state, the counterweight block can balance the weight of the blades, so that the operator can use less force to drive the driving block to move up and down, thereby making the blinds more stable and smooth when in use; on the other hand, by setting two counterweight blocks, the counterweight is divided into two, so that the counterweight block can be prepared in a smaller size, reducing the space occupied by a single counterweight block inside the window frame; 2. Through the arrangement of the first abutting surface and the second abutting surface, all the clamping sliders are driven to move synchronously, so that the first abutting surfaces of all the clamping sliders are simultaneously pressed against the peripheral wall of the retracting roller to clamp and fix the retracting roller; the rotational force of the retracting roller reacts on the clamping slider to form a driving force on the clamping slider, and this driving force is transmitted to the adjacent clamping slider through the second abutting surface, thereby consuming part of the driving force and improving the clamping effect on the retracting roller; 3. Through the setting of the pushing block and the pushing groove, after the first abutting surface of the clamping slider is driven to abut against the peripheral wall of the retracting roller, the pushing block is inserted into the pushing groove, thereby stopping the rotation of the retracting roller and reducing the possibility of free rotation of the retracting roller; in addition, the third abutting surface of the pushing groove is perpendicular to the first abutting surface of the corresponding clamping slider, so that the retracting roller is subjected to the rotational force from the blade and is transmitted to the corresponding clamping slider through the third abutting surface to form a driving force for the clamping slider. This driving force can act vertically on the adjacent clamping slider to consume the driving force of the retracting roller and improve the clamping effect on the retracting roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of Example 1; Figure 2 is a partial cross-sectional view of the retractable roller of embodiment 1; Figure 3 yes Figure 2 The enlarged view of point A in the middle; Figure 4 yes Figure 2 The enlarged view of point B in the middle; Figure 5 is a partial cross-sectional view of the mounting seat according to Embodiment 2; Figure 6 is a partial cross-sectional view of a clamping assembly according to Embodiment 2; Figure 7 is a partial cross-sectional view of the push block embodied in Embodiment 3; Figure 8 is a partial cross-sectional view of the extension tube of embodiment 4; Fig. 9 is a partial cross-sectional view of a pusher according to Embodiment 4; Fig.10 It is a partial cross-sectional view of the abutment column according to the fourth embodiment.

[0028] Description of reference numerals: 1. Window frame; 11. Driven roller; 12. Guide wheel; 13. Mounting ring groove; 14. First lifting seat; 15. Translation block; 2. Blade; 3. Retracting roller; 31. Retracting rope; 32. Pushing groove; 321. Third abutting surface; 33. Rotating wheel; 4. Driving rope; 41. Driving block; 42. Counterweight block; 43. Ball; 5. Moving part; 51. Reciprocating screw rod; 52. First gear; 53. Second gear; 6. Mounting seat; 61. Through hole; 62. Tightening column; 621. Guide groove; 622. Guide surface; 63. Reset spring; 64. Connecting block; 65. Limiting column; 66. Extension tube; 67. First avoidance groove; 68. Second avoidance groove; 7. Clamping assembly; 71. Rotating ring; 711. Push-pull sheet; 72. Clamping slider; 721. First abutting surface; 722. Second abutting surface; 723. Sliding groove; 724. Guide column; 725. Pushing block; 726. Anti-slip block; 727. Weight reduction groove; 73. Passageway; 74. Linkage gear ring; 75. Linkage rack; 76. Linkage gear; 77. Second lifting seat; 78. Push-pull strip; 781. Push-pull groove; 8. Pushing member; 81. Pushing block; 811. Connecting rod. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 -Attached Fig.10 This application is described in further detail.

[0030] Embodiment 1: The embodiment of the present application discloses a double-weighted shutter.

[0031] Reference Figure 1 , Figure 2 A double-weighted Venetian blind comprises a window frame 1, blades 2 and a retractable roller 3. In this embodiment, the window frame 1 is configured as a rectangular frame structure, and two transparent glasses (not shown in the figure) are installed in the window frame 1. The two transparent glasses are spaced apart along the thickness direction of the window frame 1. A plurality of blades 2 are provided, and the plurality of blades 2 are installed in the window frame 1 and located between the two transparent glasses.

[0032] The inner wall of the window frame 1 is provided with an installation ring groove 13, and the retracting roller 3 is rotatably installed on the inner wall of the installation ring groove 13 and is located above the blade 2. The retracting roller 3 is connected to a retracting rope 31, one end of the retracting rope 31 is fixedly connected to the outer peripheral wall of the retracting roller 3, and the other end is connected in series with all the blades 2 in sequence, driving the retracting roller 3 to rotate. The retracting rope 31 can lift or lower the blade 2.

[0033] Reference Figure 2 , Figure 3 , Figure 4A driven roller 11 is rotatably connected in the mounting annular groove 13 of the window frame 1, and the driven roller 11 is located below the blade 2. Both ends of the retractable roller 3 and the driven roller 11 are fixedly connected with rotating wheels 33. A driving rope 4 is connected between the rotating wheels 33 of the retractable roller 3 and the rotating wheels 33 of the driven roller 11, and the driving rope 4 is located in the mounting annular groove 13; the driving rope 4 is connected to a driving block 41, and the driving block 41 is slidably installed in the mounting annular groove 13 and can be lifted and lowered. One end of the driving rope 4 is fixedly connected to the driving block 41, and the other end passes around the rotating wheels 33 of the retractable roller 3 and the rotating wheels 33 of the driven roller 11 in turn and is fixedly connected to the driving block 41. The retractable roller 3 and the driven roller 11 are connected to each other through the driving rope 4 so that they can rotate synchronously.

[0034] It should be noted that, in the present embodiment, two drive ropes 4 are provided and symmetrically distributed on both sides of the blade 2, the number of drive blocks 41 is arranged corresponding to the number of drive ropes 4, and a counterweight block 42 is installed at the bottom of each drive block 41, and the counterweight block 42 is detachably connected to the drive block 41 by bolt connection.

[0035] Reference Figure 2 , Figure 3 The outer wall of the driving rope 4 is fixedly connected with a plurality of balls 43, and the plurality of balls 43 are arranged at intervals along the length direction of the driving rope 4; the outer peripheral wall of the rotating wheel 33 is provided with a plurality of grooves (not shown in the figure) for the balls 43 to be embedded, and the plurality of grooves are arranged at intervals around the central axis of the rotating wheel 33.

[0036] Reference Figure 1 , Figure 4 The window frame 1 is provided with a driving member for driving the driving block 41 to move up and down. In this embodiment, the driving member includes a first lifting seat 14, a first magnet and a second magnet. The first lifting seat 14 is arranged on the surface of the window frame 1, the first magnet (not shown in the figure) is embedded in the first lifting seat 14, and the second magnet (not shown in the figure) is embedded in the driving block 41. The first magnet and the second magnet are magnetically attracted to each other. The first lifting seat 14 is installed on the surface of the window frame 1 in the form of magnetic attraction and can drive the driving block 41 to move up and down.

[0037] Reference Figure 2 , Figure 3 A translation block 15 is slidably installed in the mounting annular groove 13, and a guide wheel 12 is rotatably connected to the side wall of the translation block 15. The guide wheel 12 is slidably installed on the inner wall of the mounting annular groove 13 of the window frame 1 through the translation block 15. The guide wheel 12 is located on one side of the retracting roller 3, and the end of the retracting rope 31 away from the blade 2 is wound around the guide wheel 12 and fixedly connected to the retracting roller 3; a moving member 5 is arranged between the guide wheel 12 and the retracting roller 3. When the retracting roller 3 rotates, the moving member 5 drives the guide wheel 12 to slide back and forth along the axial direction of the retracting roller 3.

[0038] The moving member 5 includes a reciprocating screw 51, a first gear 52 and a second gear 53. The reciprocating screw 51 is rotatably installed on the inner wall of the mounting ring groove 13. The axial direction of the reciprocating screw 51 is arranged parallel to the axial direction of the retracting roller 3. The reciprocating screw 51 is penetrated by the translation block 15 and is threadedly connected with the translation block 15. The first gear 52 is coaxially fixed to the peripheral wall of the reciprocating screw 51, and the second gear 53 is coaxially fixed to the peripheral wall of the retracting roller 3. The first gear 52 and the second gear 53 are meshed and transmitted.

[0039] The implementation principle of Example 1 of the present application is as follows: a counterweight block 42 with a certain weight is set on the driving block 41. When the shutter is switched from an open state to a closed state, the driving block 41 forces the retracting roller 3 to rotate, and the blade 2 can switch from an open state to a closed state under its own weight; when the shutter is switched from a closed state to an open state, the counterweight block 42 can balance the weight of the blade 2, so that the operator can use less force to drive the driving block 41 to rise and fall, thereby making the shutter more stable and smooth when in use; on the other hand, by setting two counterweight blocks 42, the counterweight is divided into two, so that the counterweight block 42 can be prepared in a smaller size, reducing the space occupancy rate of a single counterweight block 42 inside the window frame 1.

[0040] During the rotation of the retracting roller 3, under the meshing of the first gear 52 and the second gear 53, the reciprocating screw 51 can rotate synchronously to drive the guide wheel 12 to slide back and forth along the axial direction of the retracting roller 3, thereby guiding the retracting rope 31, so that the retracting rope 31 can be wound sequentially along the length direction of the retracting roller 3, reducing the possibility of the retracting rope 31 being wound into a ball on the outer peripheral wall of the retracting roller 3 and causing the retracting rope 31 to be entangled with each other.

[0041] Embodiment 2: The embodiment of the present application discloses a double-weighted shutter.

[0042] Reference Figure 5 , Figure 6 The difference between the double-weighted shutter disclosed in the embodiment of the present application and the embodiment 1 is that: In this embodiment, a mounting seat 6 is installed in the mounting ring groove 13 of the window frame 1. The mounting seat 6 is located on the side of the rotating wheel 33 away from the guide wheel 12. The mounting seat 6 is configured as a circular plate structure. The surrounding wall of the mounting seat 6 is fixedly connected with a plurality of connecting blocks 64. The connecting blocks 64 are fixedly installed on the inner wall of the mounting ring groove 13 away from the side wall of the mounting seat 6. The mounting seat 6 is fixedly installed in the window frame 1 through the plurality of connecting blocks 64 and is coaxially arranged between the retracting roller 3. A through hole 61 for the retracting roller 3 to pass through is provided on the surface of the mounting seat 6 close to the rotating wheel 3.

[0043] Reference Figure 5 , Figure 6The mounting seat 6 is provided with a clamping assembly 7 for clamping and fixing the retracting roller 3. In this embodiment, the clamping assembly 7 includes a rotating ring 71, a clamping slider 72, a linkage member and a rotating member. The rotating ring 71 is rotatably mounted on the mounting seat 6 and is coaxially arranged with the mounting seat 6. The clamping slider 72 is slidably mounted on the surface of the mounting seat 6 close to the rotating ring 71 and is located inside the rotating ring 71. A plurality of clamping sliders 72 are arranged around the central axis of the rotating ring 71, and the plurality of clamping sliders 72 are combined to form a penetration channel 73 for the retracting roller 3 to pass through.

[0044] Reference Figure 5 , Figure 6 , a sliding groove 723 is provided on the surface of each clamping slider 72, and the length direction of the sliding grooves 723 of two adjacent clamping sliders 72 is vertically arranged; a plurality of guide posts 724 are installed in the sliding groove 723 of each clamping slider 72, and the plurality of guide posts 724 are arranged at intervals along the length direction of the sliding groove 723, one end of each guide post 724 is rotatably connected to the surface of the mounting seat 6, and the other end is inserted into the sliding groove 723, and the outer diameter of the guide post 724 is adapted to the width of the sliding groove 723; an anti-slip block 726 is fixedly installed on the end surface of the guide post 724 away from the mounting seat 6, and the anti-slip block 726 abuts against the side wall of the clamping slider 72 away from the mounting seat 6, and each clamping slider 72 is slidably installed on the mounting seat 6 through the corresponding plurality of guide posts 724.

[0045] Reference Figure 5 , Figure 6 Each clamping slider 72 has a first abutting surface 721 and a second abutting surface 722, and the first abutting surface 721 and the second abutting surface 722 of the clamping slider 72 are vertically arranged. The first abutting surface 721 of each clamping slider 72 is used to abut against the peripheral wall of the receiving and releasing roller 3. The first abutting surfaces 721 of two adjacent clamping sliders 72 are vertically arranged, and the second abutting surface 722 of the clamping slider 72 abuts against the first abutting surface 721 of the adjacent clamping slider 72; the angle between the first abutting surface 721 of the clamping slider 72 and the displacement direction of the clamping slider 72, and the angle between the second abutting surface 722 of the clamping slider 72 and the displacement direction of the clamping slider 72 are both acute angles; a plurality of weight-reducing grooves 727 are provided on the surface of each clamping slider 72.

[0046] Reference Figure 5 , Figure 6The linkage member is arranged between the rotating ring 71 and the plurality of clamping sliders 72. When the rotating ring 71 rotates, the linkage member drives all the clamping sliders 72 to move synchronously to expand or reduce the penetration channel 73; the linkage member includes a linkage gear ring 74, a linkage rack 75 and a linkage gear 76. The linkage gear ring 74 is coaxially fixed to the inner circumferential wall of the rotating ring 71. The number of linkage racks 75, the linkage gears 76 and the number of clamping sliders 72 are correspondingly arranged. Each linkage rack 75 is fixedly connected to the corresponding side wall of the clamping slider 72, and both ends of each linkage rack 75 are extended along the displacement direction of the corresponding clamping slider 72; each linkage gear 76 is rotatably connected to the surface of the mounting seat 6, and each linkage gear 76 is meshed with the linkage gear ring 74 and the corresponding linkage rack 75.

[0047] Reference Figure 5 , Figure 6 The rotating member is arranged on the rotating ring 71 to drive the rotating ring 71 to rotate. In this embodiment, the rotating member includes a second lifting seat 77, a push-pull bar 78, a third magnet and a fourth magnet. The second lifting seat 77 is arranged on the surface of the window frame 1, and the push-pull bar 78 is slidably installed in the mounting ring groove 13. The two ends of the push-pull bar 78 are extended in the height direction. The upper end side wall of the push-pull bar 78 is provided with a push-pull groove 781. The rotating ring 71 is installed with a push-pull sheet 711. One end of the push-pull sheet 711 is fixedly installed on the outer peripheral wall of the rotating ring 71, and the other end is inserted into the push-pull groove 781 of the push-pull bar 78, driving the push-pull bar 78 to rise and fall, and the push-pull bar 78 drives the rotating ring 71 to rotate around its own central axis through the push-pull sheet 711; two limit columns 65 are fixedly installed on the surface of the mounting seat 6 close to the rotating ring 71, and the two limit columns 65 are used to limit the maximum rotation angle of the rotating ring 71.

[0048] The third magnet (not shown in the figure) is embedded in the second lifting seat 77, and the fourth magnet (not shown in the figure) is embedded in the push-pull strip 78. The third magnet and the fourth magnet are magnetically attracted to each other. The second lifting seat 77 is installed on the surface of the window frame 1 by magnetic attraction and can drive the push-pull strip 78 to move up and down. In other embodiments, the rotating ring 71 can also be driven electrically, such as by a motor.

[0049] The implementation principle of Example 2 of the present application is as follows: when the blade 2 is in the open state, the rotating ring 71 is driven to rotate, and the rotating ring 71 can drive all the clamping sliders 72 to slide synchronously to reduce the penetration channel 73, so that multiple clamping sliders 72 are clamped on the peripheral wall of the retracting roller 3 at the same time, offsetting part of the rotational force from the blade 2 on the retracting roller 3, and improving the service life of the driving rope 4; when it is necessary to lift or lower the blade 2, the rotating ring 71 is driven to reverse, so that all the clamping sliders 72 can be driven to separate from the peripheral wall of the retracting roller 3, thereby improving the operational convenience of the overall structure.

[0050] The first abutting surfaces 721 of all the clamping sliders 72 simultaneously abut against the peripheral wall of the retracting roller 3. The rotational force of the retracting roller 3 reacts on the clamping slider 72 to form a driving force on the clamping slider 72. The driving force is transmitted to the adjacent clamping slider 72 through the second abutting surfaces 722, thereby consuming part of the driving force and improving the clamping effect on the retracting roller 3.

[0051] Embodiment 3: The embodiment of the present application discloses a double-weighted shutter.

[0052] Reference Figure 7 The difference between the double-weighted shutter disclosed in the embodiment of the present application and the embodiment 2 is that: In the present embodiment, the first abutting surface 721 of each clamping slider 72 is fixedly connected to a pushing block 725, and a plurality of pushing grooves 32 are provided on the peripheral wall of the retracting roller 3, and the plurality of pushing grooves 32 are arranged at intervals around the central axis of the retracting roller 3; each pushing groove 32 has a third abutting surface 321 for the pushing block 725 to abut against, and when the clamping slider 72 drives the pushing block 725 to insert into the pushing groove 32 and the third abutting surface 321 of the pushing groove 32 abuts against the pushing block 725, the third abutting surface 321 of the pushing groove 32 is perpendicular to the first abutting surface 721 of the corresponding clamping slider 72 (that is, the side wall where the pushing block 725 abuts against the third abutting surface 321 is vertically arranged with the first abutting surface 721 of the corresponding clamping slider 72).

[0053] In order to enable the pushing block 725 to be inserted into the pushing groove 32 and the third abutting surface 321 of the pushing groove 32 to be perpendicular to the first abutting surface 721 of the corresponding clamping slider 72, an identification scale line (not shown in the figure) can be set on the surface of the window frame 1, and the identification scale line is located on one side of the first lifting seat 14 to guide the lifting height of the first lifting seat 14. The height of the first lifting seat 14 is fine-tuned by the identification scale line, so that when the blade 2 is in the open state and the retracting roller 3 is in the stationary state, the pushing block 725 can be inserted into the pushing groove 32 and the third abutting surface 321 of the pushing groove 32 is perpendicular to the first abutting surface 721 of the corresponding clamping slider 72.

[0054] The implementation principle of Example 3 of the present application is as follows: after the first abutment surface 721 of the clamping slider 72 is driven to abut against the peripheral wall of the retracting roller 3, the pushing block 725 is inserted into the pushing groove 32, thereby stopping the rotation of the retracting roller 3 and reducing the possibility of free rotation of the retracting roller 3; in addition, the third abutment surface 321 of the pushing groove 32 is perpendicular to the first abutment surface 721 of the corresponding clamping slider 72, so that the retracting roller 3 is subjected to the rotational force from the blade 2 and is transmitted to the corresponding clamping slider 72 through the third abutment surface 321 to form a driving force for the clamping slider 72, and this driving force can act vertically on the adjacent clamping slider 72 to consume the driving force of the retracting roller 3 and improve the clamping effect on the retracting roller 3.

[0055] Embodiment 4: The embodiment of the present application discloses a double-weighted shutter.

[0056] Reference Figure 8 , Fig. 9 , Fig.10 The difference between the double-weighted shutter disclosed in the embodiment of the present application and the embodiment 2 is that: In this embodiment, the side wall of the mounting seat 6 away from the rotating ring 71 is integrally formed with an extension tube 66, and the through hole 61 extends into the extension tube 66. A clamping column 62 is slidably installed in the extension tube 66, and the clamping column 62 is used to clamp the end surface of the retracting roller 3; a return spring 63 is installed between the clamping column 62 and the extension tube 66, and one end of the return spring 63 is fixedly connected to the side wall of the clamping column 62 away from the retracting roller 3, and the other end is fixedly connected to the inner wall of the extension tube 66. The return spring 63 normally causes the clamping column 62 to separate from the end surface of the retracting roller 3.

[0057] Reference Fig. 9 , Fig.10 The clamping slider 72 is provided with a pushing member 8. When the first abutting surface 721 of the clamping slider 72 is pressed against the peripheral wall of the retracting roller 3, the pushing member 8 drives the pressing column 62 to press against the end surface of the retracting roller 3; a guide groove 621 is provided on the peripheral wall of the pressing column 62, and the guide groove 621 is arranged in a ring shape around the central axis of the pressing column 62. The guide groove 621 has an annular guide surface 622. The pushing member 8 includes a plurality of pushing blocks 81, and the plurality of pushing blocks 81 are arranged corresponding to the plurality of clamping sliders 72. The side wall of each pushing block 81 is fixedly connected with a connecting rod 811, and one end of the connecting rod 811 is fixedly connected to the pushing block 81, and the other end passes through the mounting seat 6 and is fixedly connected to the corresponding clamping slider 72. The pushing block 81 and the corresponding clamping slider 72 are connected to each other through the connecting rod 811.

[0058] The mounting seat 6 is provided with a first avoidance groove 67 for avoiding the connecting rod 811, and the outer wall of the extension tube 66 is provided with a second avoidance groove 68 for the pushing block 81 to be inserted into the through hole 61; when the first abutting surface 721 of the clamping slider 72 is pressed against the peripheral wall of the retracting roller 3, the clamping slider 72 drives the corresponding pushing block 81 to insert into the guide groove 621, and pushes the abutting column 62 to press against the end surface of the retracting roller 3 through the guide surface 622.

[0059] The implementation principle of Example 4 of the present application is as follows: when the blade 2 is in the open state, the surrounding wall of the retracting roller 3 is clamped and fixed by the clamping slider 72. During the movement of the clamping slider 72, the pushing block 81 can be driven to move synchronously, so that the pushing block 81 is inserted into the guide groove 621, and the guide surface 622 of the guide groove 621 is used to push the clamping column 62, so that the clamping column 62 can be clamped on the end surface of the retracting rope 31. The cooperation between the clamping column 62 and the clamping slider 72 improves the fixing effect of the retracting roller 3, thereby reducing the possibility that the steering force of the blade 2 on the retracting roller 3 acts on the driving rope 4 for a long time, causing the driving rope 4 to undergo irreversible deformation.

[0060] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double-weighted blind, comprising a window frame (1), blades (2) and a retractable roller (3), wherein the blades (2) are installed in the window frame (1) and are provided in plurality, the retractable roller (3) is rotatably connected in the window frame (1), the retractable roller (3) is connected to a retractable rope (31), and the retractable rope (31) sequentially connects all the blades (2) in series; characterized in that: The window frame (1) is rotatably connected to a driven roller (11); two driving ropes (4) are wound between the retractable roller (3) and the driven roller (11); the two driving ropes (4) are symmetrically distributed on both sides of the blade (2); each of the driving ropes (4) is connected to a driving block (41); the driving block (41) is slidably installed in the window frame (1); each of the driving blocks (41) is connected to a counterweight block (42); when the driving block (41) is driven to rise or fall, the driving rope (4) drives the retractable roller (3) and the driven roller (11) to rotate synchronously; the window frame (1) is provided with a driving member for driving the driving block (41) to rise or fall.

2. A double-weighted shutter according to claim 1, characterized in that: A guide wheel (12) is slidably installed in the window frame (1) and is located on one side of the retractable roller (3); the end of the retractable rope (31) away from the blade (2) is wound around the guide wheel (12) and connected to the retractable roller (3); a moving part (5) is provided between the guide wheel (12) and the retractable roller (3); when the retractable roller (3) rotates, the moving part (5) drives the guide wheel (12) to slide back and forth along the axial direction of the retractable roller (3).

3. The double-weighted shutter according to claim 1, characterized in that: A mounting seat (6) is provided in the window frame (1), and the mounting seat (6) is provided with a through hole (61) for the retractable roller (3) to pass through; the mounting seat (6) is provided with a clamping assembly (7) for clamping and fixing the retractable roller (3).

4. A double-weighted shutter according to claim 3, characterized in that: The clamping assembly (7) comprises a rotating ring (71), a clamping slider (72), a linkage member and a rotating member. The rotating ring (71) is rotatably mounted on the mounting seat (6) and is coaxially arranged with the mounting seat (6). The clamping slider (72) is slidably mounted on the surface of the mounting seat (6) close to the rotating ring (71). A plurality of clamping sliders (72) are arranged around the central axis of the rotating ring (71). The plurality of clamping sliders (72) are combined to form a through-channel (73) for the retractable roller (3) to pass through. The linkage member is arranged between the rotating ring (71) and the plurality of clamping sliders (72). When the rotating ring (71) rotates, the linkage member drives all the clamping sliders (72) to move synchronously to expand or reduce the through-channel (73). The rotating member is arranged on the rotating ring (71) to drive the rotating ring (71) to rotate.

5. A double-weighted shutter according to claim 4, characterized in that: Each of the clamping sliders (72) has a first abutting surface (721) and a second abutting surface (722), and the first abutting surface (721) and the second abutting surface (722) of the clamping slider (72) are arranged vertically; the first abutting surface (721) of the clamping slider (72) is used to abut against the peripheral wall of the receiving and releasing roller (3), and the first abutting surfaces (721) of two adjacent clamping sliders (72) are arranged vertically, and the second abutting surface (722) of the clamping slider (72) abuts against the first abutting surface (721) of the adjacent clamping slider (72).

6. The double-weighted shutter according to claim 4, characterized in that: A sliding groove (723) is provided on the surface of each clamping slider (72), and the length directions of the sliding grooves (723) of two adjacent clamping sliders (72) are arranged vertically; a plurality of guide columns (724) are arranged in the sliding groove (723), one end of the guide column (724) is rotatably connected to the surface of the mounting seat (6), and the other end is inserted into the sliding groove (723), and each clamping slider (72) is slidably installed on the surface of the mounting seat (6) through the corresponding plurality of guide columns (724).

7. The double-weighted shutter according to claim 4, characterized in that: The linkage member comprises a linkage gear ring (74), a linkage rack (75) and a linkage gear (76); the linkage gear ring (74) is coaxially arranged on the inner peripheral wall of the rotating ring (71); the number of the linkage racks (75) is arranged corresponding to the number of the clamping sliders (72); each linkage rack (75) is connected to the corresponding clamping slider (72); both ends of the linkage rack (75) are extended along the displacement direction of the corresponding clamping slider (72); the linkage gear (76) is rotatably connected to the surface of the mounting seat (6); the number of the linkage gears (76) is arranged corresponding to the number of the linkage racks (75); each linkage gear (76) is meshed with the linkage gear ring (74) and the corresponding linkage rack (75).

8. The double-weighted shutter according to claim 5, characterized in that: The first abutment surface (721) of each clamping slider (72) is connected to a pushing block (725), and a plurality of pushing grooves (32) are provided on the peripheral wall of the retracting roller (3). The plurality of pushing grooves (32) are arranged at intervals around the central axis of the retracting roller (3), and each pushing groove (32) has a third abutment surface (321) for the pushing block (725) to abut against. When the clamping slider (72) drives the pushing block (725) to insert into the pushing groove (32) and the third abutment surface (321) of the pushing groove (32) abuts against the pushing block (725), the third abutment surface (321) of the pushing groove (32) is perpendicular to the first abutment surface (721) of the corresponding clamping slider (72).

9. The double-weighted shutter according to claim 5, characterized in that: The mounting seat (6) is slidably mounted with a clamping column (62) for clamping against the end face of the retractable roller (3); a return spring (63) is provided between the clamping column (62) and the mounting seat (6); the return spring (63) normally causes the clamping column (62) to separate from the end face of the retractable roller (3); the clamping slider (72) is provided with a pushing member (8); when the first abutting surface (721) of the clamping slider (72) is pressed against the peripheral wall of the retractable roller (3), the pushing member (8) drives the clamping column (62) to press against the end face of the retractable roller (3).

10. The double-weighted shutter according to claim 9, characterized in that: The peripheral wall of the clamping column (62) is provided with a guide groove (621), and the guide groove (621) has a guide surface (622); the pushing member (8) includes a plurality of pushing blocks (81), and the plurality of pushing blocks (81) are arranged corresponding to a plurality of clamping sliders (72), and each of the pushing blocks (81) is connected to a corresponding clamping slider (72). When the first abutting surface (721) of the clamping slider (72) is pressed against the peripheral wall of the retracting roller (3), the clamping slider (72) drives the corresponding pushing block (81) to be inserted into the guide groove (621), and pushes the clamping column (62) to be pressed against the end surface of the retracting roller (3) through the guide surface (622).

Images