A horizontal folding automatic descending type double-layer curtain system with single cycle bead pulling control

Abstract

The utility model discloses a horizontal folding automatic descending type's double -deck window curtain system of single cycle pull bead control, including top rail, bottom rail, middle rail, first window curtain, second window curtain, pull bead, second window curtain lifting rope, first window curtain lifting rope, control assembly, the control assembly sets up inside top rail, one end of control assembly is around with pull bead, one end of second window curtain lifting rope and first window curtain lifting rope is rolled and is established in control assembly, the middle rail is located below top rail, the bottom rail is located below middle rail, second window curtain folding is installed between bottom rail and middle rail, first window curtain folding is installed between middle rail with top rail, through control assembly and the action cooperation of rope pulley and pull bead, realize single rope control window curtain and realize the single cycle action of first window curtain unfolding, second window curtain unfolding, second window curtain storage and first window curtain storage, compared with existing window curtain is more simple and beautiful and convenient operation, and the integration degree is high.

Description

Technical Field

[0001] This utility model relates to the field of curtains, specifically to a double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle pull bead. Background Technology

[0002] Existing curtains typically have two beaded pulls, one for controlling the opening of the curtain and the other for rotating the curtain slats to adjust the light-blocking level; or another beaded pull for controlling the opening and closing of the sheer curtain. Because the curtains are often quite tall, users need to pull the beaded pulls from below, resulting in very long beaded pulls. These two pulls are also prone to tangling, making the curtains inconvenient to use, aesthetically unappealing, and lacking in simplicity. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a horizontally folding, automatically descending double-layer curtain system with single-cycle pull bead control to solve the above-mentioned problems.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a horizontally folding, automatically descending double-layer curtain system controlled by a single-cycle pull bead, comprising a top rail, a bottom rail, a middle rail, a first curtain, a second curtain, pull beads, a second curtain cord, a first curtain cord, and a control assembly; the control assembly is disposed inside the top rail, one end of the control assembly is wound with a pull bead, one end of the second curtain cord and the first curtain cord are wound inside the control assembly, the other end of the second curtain cord is fixedly installed to the bottom rail, the first curtain cord is fixedly installed to the middle rail, the middle rail is located below the top rail, the bottom rail is located below the middle rail, the second curtain is folded and installed between the bottom rail and the middle rail, and the first curtain is folded and installed between the middle rail and the top rail; by pulling the individual pull bead, the second curtain cord and the first curtain cord in the control assembly are simultaneously released, simultaneously retracted, individually released, and individually retracted, thereby realizing the opening and closing of the first curtain and the second curtain.

[0005] Preferably, the control assembly includes a first curtain rotation shaft, a sheave, a second curtain rotation shaft, a reversing assembly, a linkage assembly, a coil brake assembly, a damping assembly, a locking assembly, and an end-stop assembly; both the second curtain rotation shaft and the first curtain rotation shaft pass through the linkage assembly, at least two coil brake assemblies, the damping assembly, and the locking assembly; one end of the second curtain rotation shaft is connected to the end-stop assembly, and the other end is connected to the first output end of the reversing assembly; one end of the first curtain is hinged to the top rail, and the other end is connected to the second output end of the reversing assembly; the input end of the reversing assembly is connected to the sheave; the control assembly includes a first curtain open state and a first curtain retracted state. The system has two states: the first curtain is in its unfolded state, and the second curtain is in its retracted state. When both the first and second curtains are in their retracted state, and the pull bead is pulled downwards for the first time, the control assembly enters the first curtain unfolded state. The reversing component outputs torque to the first curtain's rotating shaft through the second output terminal. The linkage component is in a state where the first and second curtain's rotating shafts are linked. At this time, both the second and first curtain cords are in the unwinding state, and both the bottom and middle rails descend. The first curtain unfolds as the middle rail descends. When the first curtain is unfolded to its maximum extent, and the pull bead is pulled downwards in the opposite direction for the first time, the system enters the second curtain unfolded state. The reversing component then outputs torque to the first curtain's rotating shaft through the first output terminal. The output end supplies power to the second curtain rotating shaft. The linkage component is in a state where the first and second curtain rotating shafts are disconnected. The first curtain rotating shaft is locked by the locking component, causing the bottom rail to suspend. At this time, the second curtain rotating shaft rotates in the reverse direction, causing the cord brake component to wind up the second curtain cord, raising the center rail, thus unfolding the second curtain and retracting the first curtain. When it reaches a preset height, releasing the pull bead locks the second curtain rotating shaft by the locking component. When the pull bead is pulled forward a second time, the locking component can reverse to release the locking state of the second curtain rotating shaft, thus entering the second curtain retracting state. At this time, the first... The two curtain shafts continue to rotate in the opposite direction, thereby releasing the first curtain cord, causing the center rail to descend, which in turn causes the second curtain to retract while the first curtain unfolds. When the second curtain is lowered to its maximum extent, the end limiting component pushes the second curtain shaft to move radially, causing the reversing component to switch the torque from the first output end to the second output end. Thus, when the pull bead is pulled in the opposite direction for the second time, the first curtain enters the retracted state. At this time, the linkage component is on the turntable where the first curtain shaft and the second curtain shaft are linked. At this time, the second curtain cord and the first curtain cord are in the retracted state, causing the bottom rail and the center rail to rise, and the first curtain retracts as the center rail rises.

[0006] Preferably, the reversing assembly includes a first housing, a reduction gear set, a reversing input shaft, a first rotating disk, a second rotating disk, a first gear, a second gear, a first output shaft sleeve, and a second output shaft sleeve; the rope pulley is hingedly installed in the first housing, and a third gear is provided on the side of the rope pulley; the input end of the reduction gear set meshes with the third gear, and the output end of the reduction gear set is fixedly connected to the reversing input shaft; the reversing input shaft, the first rotating disk, the first gear, and the first output shaft sleeve are arranged on the extended axis of the second curtain rotating shaft, and the second gear and the second output shaft sleeve are arranged on the extended axis of the first curtain rotating shaft; a first axial groove is provided on the reversing input shaft, and the first rotating disk is limited and disposed in the first axial groove; the first rotating disk... A second rotating disk is fixedly mounted on an output shaft sleeve. A limit sleeve is provided on the second rotating disk, and a pusher parallel to the second rotating disk is sleeved on the limit sleeve. A spring is provided between the pusher and the second rotating disk. The first gear is hinged to one end of the reversing input shaft near the reduction gear set. An elastic limit slider is provided on the first housing corresponding to the position of the first rotating disk. A first limit track and a second limit track are provided on the first rotating disk corresponding to the elastic limit slider. Wedge-shaped protrusions are arrayed on both sides of the first rotating disk. A wedge-shaped protrusion is also provided on the side of the second rotating disk near the first rotating disk. A wedge-shaped protrusion is also provided on the side of the first gear near the first rotating disk. The second gear is meshed with the first gear.

[0007] Preferably, the locking assembly includes a second housing and an inner bushing, an outer bushing, a movable ball, and a buffer spring mirror-distributed within the second housing. The inner bushing is hinged to the second housing, and the outer bushing is sleeved on the inner bushing. One end of the buffer spring is disposed on the inner bushing, and the other end is sleeved and fixed on the outer bushing. The outer bushing can only rotate unidirectionally relative to the inner bushing. A first cyclic limiting groove for accommodating the movable ball is formed on the circumferential surface of the outer bushing. A straight groove for accommodating the movable ball is formed inside the second housing, such that half of the movable ball is located in the first cyclic limiting groove, and the other half is located in the straight groove. The first cyclic limiting groove includes a forward-pulling cyclic section, a reverse locking section, and a reverse-pulling unlocking section. When the pull bead is pulled, the outer bushing and the inner bushing rotate with the second curtain rotation shaft or the first curtain rotation shaft, at which time the movable ball begins to rotate. Finally, when the pull action stops or the bead is released, the weight of the bottom rail and the middle rail causes the second curtain rotating shaft and the first curtain rotating shaft to rotate in opposite directions. At this time, the movable ball moves in the opposite direction into the reverse locking section, thereby preventing the second curtain rotating shaft and the first curtain rotating shaft from continuing to rotate. When the bead is pulled in the opposite direction continuously, the movable ball moves from the reverse locking section into the reverse unlocking section. Thus, by utilizing the fact that the outer bushing can only rotate in one direction relative to the inner bushing, the first curtain rotating shaft and the second curtain rotating shaft can rotate in opposite directions. When it is necessary to continue pulling the bead in the forward direction, the bead must first be pulled in the reverse direction, so that the movable ball moves from the reverse locking section into the reverse unlocking section. Then, the bead is pulled in the forward direction, so that the movable ball returns from the reverse unlocking section to the forward pull cycle section, thereby enabling the first curtain rotating shaft and the second curtain rotating shaft to continue to rotate in the forward direction.

[0008] Preferably, the linkage assembly includes a third housing, a sliding plate, a return spring, a hinge seat, a linkage bushing, a swing plate, a fourth gear, a fifth gear, a lifting rod, and a sixth gear. The bottom of the third housing has a sliding groove radially toward the rotation axis of the second curtain. The sliding plate is positioned within the sliding groove. The upper limit of the third housing has a lifting rod that can only move up and down. The bottom of the lifting rod abuts against the swing plate. The bottom of the top rail has a first thread hole corresponding to the position of the lifting rod. The bottom of the third housing has a second thread hole corresponding to the cord brake assembly. The sliding plate has a third thread hole offset from the first thread hole. One end of the second curtain cord and one end of the first curtain cord pass through the first thread hole in sequence. The first, second, and third thread guide holes are wound onto the cord brake assembly. The return spring is positioned between the sliding plate and the third housing. An elastic diaphragm is installed on the first thread guide hole, which protrudes in the corresponding direction when the second and first curtain cords are pulled. The bottom of the lifting rod abuts against the elastic diaphragm. The fourth gear is fixedly mounted on the linkage sleeve. The fifth gear is hinged to the swing plate and meshes with the fourth gear. The sixth gear is sleeved on the second curtain rotation shaft. When the swing plate swings toward the second curtain rotation shaft, the fifth gear meshes with the sixth gear. When the lifting rod rises with the elastic diaphragm and lifts the swing plate, the fifth gear disengages from the sixth gear.

[0009] Preferably, the rope brake assembly includes a brake drum, a rotating drum, a brake bushing, and a brake protrusion; the brake drum is arranged parallel to the rotating drum; one end of the brake bushing enters one end of the brake drum, and the brake drum is hinged; an inclined groove is formed at the end of the brake drum near the brake bushing; a wedge-shaped brake block is arranged in a circular array at the end of the brake bushing away from the brake bushing, and a brake limiting block is arranged at the other end corresponding to the inclined groove; the brake protrusion is disposed on the third housing, and the brake protrusion is also spaced apart from the wedge-shaped brake block.

[0010] Preferably, the brake drum and the rotating drum are arranged in a conical shape.

[0011] Preferably, the cross-sections of the second curtain rotation axis and the first curtain rotation axis are polygonal.

[0012] Preferably, the end-positioning assembly includes a fourth housing, a first helical gear, a second helical gear, an external threaded bushing, and an internal threaded bushing; one end of the external threaded bushing is hinged to the fourth housing, and the other end is hinged to the first helical gear; one end of the first helical gear is hinged to the fourth housing; the second helical gear is disposed beside the first helical gear and meshes with the first helical gear; the axis of the second helical gear intersects with that of the first helical gear; both ends of the second helical gear are hinged to and positioned by the fourth housing; the fourth housing has a second positioning groove corresponding to the external threaded bushing; the internal threaded bushing is sleeved on the external threaded bushing and extends outward into the second positioning groove.

[0013] The main technical advantages of this utility model are: by coordinating the operation of the control assembly with the rope wheel and the pull bead, a single-rope control of the curtain can achieve a single-cycle operation of opening the first curtain, opening the second curtain, closing the second curtain, and closing the first curtain. Compared with existing curtains, this is simpler, more beautiful, easier to operate, and has a high degree of integration. Attached Figure Description

[0014] Figure 1 This is a front view of the present invention; Figure 2 Top sectional view of the control assembly; Figure 3 This is a top sectional view of the commutation assembly; Figure 4 A side section view of the locked component; Figure 5 Hide the front view of the second housing for the locking component; Figure 6 Hide the top view of the second housing for the locking component; Figure 7 Rear view mirror image of the second housing hidden for locking components; Figure 8 The bottom view of the second housing is hidden to conceal the locking component; Figure 9 This is a side sectional view of the linked components; Figure 10 Top view of the linkage assembly and the coil brake assembly Figure 11 This is a top view of the end-position limiting component.

[0015] The attached diagram is labeled as follows: 1-Top rail, 11-First thread guide hole, 2-Bottom rail, 3-Middle rail, 4-First curtain, 5-Second curtain, 6-Pull bead, 7-Second curtain cord, 8-First curtain cord, 9-Control assembly, 91-First curtain rotating shaft, 92-Rope pulley, 93-Second curtain rotating shaft, 94-Reversing assembly, 941-First housing, 9411-Elastic limit slider, 942-Reduction gear set, 943-Reversing input shaft, 944-First... 9441-Limiting bushing, 9442-Push plate, 9443-First limiting track, 9444-Second limiting track, 9445-Wedge-shaped protrusion, 945-Second rotating disk, 946-First gear, 947-Second gear, 948-First output bushing, 949-Second output bushing, 950-Third gear, 95-Linkage assembly, 951-Third housing, 9511-Second wire hole, 952-Sliding plate, 9521- Third cable guide hole, 953-Reset spring, 954-Hinge seat, 955-Linkage bushing, 956-Swing plate, 957-Fourth gear, 958-Fifth gear, 959-Lifting rod, 960-Sixth gear, 96-Rope winding brake assembly, 961-Brake drum, 962-Rotating drum, 963-Brake bushing, 964-Brake protrusion, 9611-Inclined groove, 9631-Wedge-shaped brake block, 9632-Brake limit block, 97-Resistant 98-Locking component, 981-Second housing, 982-Inner bushing, 983-Outer bushing, 984-Moving ball, 985-Buffer spring, 986-First limiting groove, 9811-Straight groove, 99-End limiting component, 991-Fourth housing, 992-First helical gear, 993-Second helical gear, 994-External threaded bushing, 995-Internal threaded bushing, A-Forward pull circulation section, B-Reverse locking section, C-Reverse pull unlocking section. Detailed Implementation

[0016] The following detailed description of preferred embodiments of the present invention, in conjunction with the accompanying drawings, will make the technical solution of the present invention easier to understand and master.

[0017] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right side", "left end", "above", "back", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, unless otherwise specified in this specific embodiment, the connection or fixing method between components can be achieved by bolt fixing, pin fixing, or pin connection commonly used in the prior art. Therefore, it will not be described in detail in this embodiment.

[0019] This utility model provides a horizontally folding, automatically descending double-layer curtain system with single-cycle beaded control, such as... Figure 1-2 As shown, the system includes a top rail 1, a bottom rail 2, a middle rail 3, a first curtain, a second curtain, a beaded cord 6, a second curtain cord 7, a first curtain cord 8, and a control assembly 9. The control assembly 9 is located inside the top rail 1. One end of the control assembly 9 is wound with the beaded cord 6. One end of the second curtain cord 7 and the first curtain cord 8 are wound inside the control assembly 9. The other end of the second curtain cord 7 is fixedly installed to the bottom rail 2. The first curtain cord 8 is fixedly installed to the middle rail 3. The middle rail 3 is located below the top rail 1, and the bottom rail 2 is located below the middle rail 3. The second curtain is folded and installed between the bottom rail 2 and the middle rail 3, and the first curtain is folded and installed between the middle rail 3 and the top rail 1. By pulling the individual beaded cord 6, the control assembly 9 can be driven to achieve single-cycle synchronous release, synchronous retraction, individual release, and individual retraction of the second curtain cord 7 and the first curtain cord 8, thereby realizing the unfolding and retraction of the first curtain and the second curtain. In this embodiment, the first curtain and the second curtain are either a sheer curtain or a blackout curtain.

[0020] The control assembly 9 includes a first curtain rotating shaft 91, a rope pulley 92, a second curtain rotating shaft 93, a reversing assembly 94, a linkage assembly 95, a rope brake assembly 96, a damping assembly 97, a locking assembly 98, and an end-stopping assembly 99. Both the second curtain rotating shaft 93 and the first curtain rotating shaft 91 pass through the linkage assembly 95, at least two rope brake assemblies 96, the damping assembly 97, and the locking assembly 98. One end of the second curtain rotating shaft 93 is connected to the end-stopping assembly 99, and the other end is connected to the first output end of the reversing assembly 94. One end of the first curtain is hinged to the top rail 1, and the other end is connected to the second output end of the reversing assembly 94. The input end of the reversing assembly 94 is connected to the rope pulley 92. The damping assembly 97 is used for… The system is designed to slow down the rotation speed of the second curtain rotating shaft 93 and the first curtain rotating shaft 91, preventing the bottom rail 2 and the middle rail 3 from falling too quickly. The rope wheel 92 is used to convert the pulling action of the pull bead 6 into the axial rotation of the rope wheel 92. The reversing component 94 is used to control the torque output switching of the rope wheel 92 on the second curtain rotating shaft 93 and the first curtain rotating shaft 91. The winding brake component 96 is used to wind up or release the second curtain rope 7 and the first curtain rope 8. The linkage component 95 is used to control the synchronous rotation or independent rotation of the second curtain rotating shaft 93 and the first curtain rotating shaft 91. The locking component 98 is used to lock the bottom rail 2 and the middle rail 3 as they fall naturally, thereby maintaining the height of the bottom rail 2 and the middle rail 3, and unlocking is achieved by rotating in the opposite direction. The control assembly 9 includes a first curtain open state, a first curtain closed state, a second curtain open state, and a second curtain closed state. When both the first and second curtains are in the closed state, and the pull bead 6 is pulled downwards for the first time, the control assembly 9 enters the first curtain open state. The reversing component 94 outputs torque to the first curtain rotating shaft 91 through the second output terminal. The linkage component 95 is in a state where the first curtain rotating shaft 91 and the second curtain rotating shaft 93 are linked. At this time, both the second curtain cord 7 and the first curtain cord 8 are in the unwinding state, and both the bottom rail 2 and the middle rail 3 descend. The first curtain descends along with the middle rail 3. The first curtain unfolds to its maximum extent. When the pull bead 6 is pulled down in the opposite direction for the first time, the second curtain unfolds. The reversing component 94 outputs the twist to the second curtain rotating shaft 93 through the first output end. The linkage component 95 is in a state where the first curtain rotating shaft 91 and the second curtain rotating shaft 93 are disconnected. The first curtain rotating shaft 91 is locked by the locking component 98, causing the bottom rail 2 to stop. At this time, the second curtain rotating shaft 93 rotates in the opposite direction, causing the rope brake component 96 to wind up the second curtain rope 7, causing the middle rail 3 to rise, thereby causing the second curtain to unfold and the first curtain to retract. When it rises to the preset position... After the height is reached, when the pull bead 6 is released, the second curtain rotating shaft 93 is locked by the locking component 98; when the pull bead 6 is pulled forward a second time, the locking component 98 can reverse to release the locked state of the second curtain rotating shaft 93, thereby entering the second curtain storage state. At this time, the second curtain rotating shaft 93 continues to rotate in the reverse direction, thereby releasing the first curtain cord 8, causing the center rail 3 to descend, thus causing the second curtain to be stored and the first curtain to be unfolded; when the second curtain is lowered to its maximum range, the end limiting component 99 pushes the second curtain rotating shaft 93 to move radially, causing the reversing component 94 to switch the torque from the first output end. When the second output end is reached and the pull bead 6 is pulled in the opposite direction for the second time, the first curtain enters the retracted state. At this time, the linkage component 95 is on the turntable where the first curtain rotation shaft 91 and the second curtain rotation shaft 93 are linked. At this time, the second curtain rope 7 and the first curtain rope 8 are in the retracted state, causing the bottom rail 2 and the middle rail 3 to rise, and the first curtain retracts as the middle rail 3 rises. Through the coordinated action of the control assembly 9, the rope wheel 92 and the pull bead 6, the curtain can be controlled by a single rope to open and close the first curtain, open and close the second curtain, and close the second curtain. Compared with existing curtains, this is simpler, more beautiful and easier to operate, with a high degree of integration.

[0021] In this embodiment, the pull bead 6 can be replaced by a pull cord.

[0022] As a preferred option, such as Figure 3As shown, the reversing assembly 94 includes a first housing 941, a reduction gear set 942, a reversing input shaft 943, a first rotating disk 944, a second rotating disk 945, a first gear 946, a second gear 947, a first output shaft sleeve 948, and a second output shaft sleeve 949. The pulley 92 is hinged within the first housing 941, and a third gear 950 is disposed beside the pulley 92. The input end of the reduction gear set 942 meshes with the third gear 950, and the output end of the reduction gear set 942 is fixedly connected to the reversing input shaft 943. The reversing input shaft 943, the first rotating disk 944, the first gear 946, and the first output shaft... A sleeve 948 is disposed on the extended axis of the second curtain rotation shaft 93, and a second gear 947 and a second output sleeve 949 are disposed on the extended axis of the first curtain rotation shaft 91. A first axial groove is provided on the reversing input shaft 943, and a first rotating disk 944 is limited and disposed within the first axial groove. A second rotating disk 945 is fixedly mounted on the first output sleeve 948, and a limiting sleeve 9441 is provided on the second rotating disk 945. A pusher 9442, parallel to the second rotating disk 945, is sleeved on the limiting sleeve 9441, and a spring is provided between the pusher 9442 and the second rotating disk 945. The reversing input shaft 948... The first gear 946 is hinged to one end of the input shaft 943 near the reduction gear set 942; an elastic limiting slider 9441 is provided on the first housing 941 at the position corresponding to the first rotating disk 944, and a first limiting track 9443 and a second limiting track 9444 are provided on the first rotating disk 944 corresponding to the elastic limiting slider 9441; wedge-shaped protrusions 9445 are arrayed on both sides of the first rotating disk 944, and wedge-shaped protrusions 9445 are also provided on the side of the second rotating disk 945 near the first rotating disk 944; and wedge-shaped protrusions 9445 are also provided on the side of the first gear 946 near the first rotating disk 944. The second gear 947 meshes with the first gear 946; when the first rotating disk 944 receives a radial thrust, the elastic limiting slider 9441 deforms downward, thereby causing the first rotating disk 944 to move axially, so that the elastic limiting slider 9441 changes from the corresponding first limiting track 9443 to the second limiting track 9444, or from the corresponding second limiting track 9444 to the first limiting track 9443; the wedge-shaped protrusion 9445 is provided with an inclined surface and a right-angled surface, and when the first rotating disk 944 rotates in one direction, a radial thrust can be generated by the inclined surface of the wedge-shaped protrusion 9445 on the second rotating disk 945 and the inclined surface between the first rotating disk 944;This causes the first rotating disk 944 to move laterally and approach the first gear 946. At this time, the wedge-shaped protrusion 9445 on the other side of the first rotating disk 944 abuts against the right-angled surface of the wedge-shaped protrusion 9445 on the first gear 946, thereby enabling the first rotating disk 944 to drive the first gear 946 to rotate. Similarly, when the first rotating disk 944 rotates in the opposite direction, the inclined surfaces of the wedge-shaped protrusion 9445 on the first rotating disk 944 and the first gear 946 abut against each other, causing the first rotating disk 944 to move radially toward the second rotating disk 945. The second rotating disk 945 is also provided with a second axial groove. When the first rotating disk 944 approaches the second rotating disk 945, the first rotating disk... One end of 944 enters the second axial groove, so that when the first rotating disk 944 rotates in the opposite direction, the inclined surface of the wedge-shaped protrusion 9445 abuts against the inclined surface, but the first rotating disk 944 abuts against the second axial groove and cannot push the first rotating disk 944 to move axially; when the second curtain falls to its lowest position, the end limiting component 99 pushes the second curtain rotating shaft 93 to move radially toward the second rotating disk 945, so that the pusher 9442 on the second rotating disk 945 pushes the first rotating disk 944 to move radially and disengage from the second axial groove. At this time, the thrust generated by the inclined surface of the wedge-shaped protrusion 9445 abutting against the inclined surface causes the first rotating disk 944 to move toward the first gear 946.

[0023] As a preferred option, such as Figure 4-8As shown, the locking assembly 98 includes a second housing 981 and an inner bushing 982, an outer bushing 983, a movable ball 984, and a buffer spring 985 mirror-distributed within the second housing 981. The inner bushing 982 is hinged to the second housing 981, and the outer bushing 983 is sleeved on the inner bushing 982. One end of the buffer spring 985 is disposed on the inner bushing 982, and the other end is sleeved on and fixed to the outer bushing 983. The outer bushing 983 can only rotate unidirectionally relative to the inner bushing 982. A first cyclic limiting groove 986 for accommodating the movable sphere 984 is formed on the circumferential surface of the second housing 981; a straight groove 9811 for accommodating the movable sphere 984 is formed inside the second housing 981, such that half of the movable sphere 984 is located in the first cyclic limiting groove 986 and the other half is located in the straight groove 9811; the first cyclic limiting groove 986 includes a forward pull cyclic section A, a reverse locking section B, and a reverse pull unlocking section C; when the pull bead 6 is pulled, the outer bushing 983 and the inner bushing 982 move with the second curtain rotation shaft 93 or The first curtain rotating shaft 91 rotates, and the movable ball 984 is always located within the forward pull circulation section A. When the pulling action stops or the pull bead 6 is released, the weight of the bottom rail 2 and the middle rail 3 causes the second curtain rotating shaft 93 and the first curtain rotating shaft 91 to rotate in opposite directions. At this time, the movable ball 984 moves in the opposite direction into the reverse locking section B, thereby preventing the second curtain rotating shaft 93 and the first curtain rotating shaft 91 from continuing to rotate. When the pull bead 6 is continuously pulled in the opposite direction, the movable ball 984 moves from the reverse locking section B into the reverse release section. Locking section C; thus, by utilizing the fact that the outer bushing 983 can only rotate in one direction relative to the inner bushing 982, the first curtain rotating shaft 91 and the second curtain rotating shaft 93 can rotate in opposite directions; when it is necessary to continue to pull the pull bead 6 in the forward direction, the pull bead 6 needs to be pulled in the reverse direction first, so that the movable ball 984 enters the reverse pull unlocking section C from the reverse locking section B, and then the pull bead 6 is pulled downwards in the forward direction, so that the movable ball 984 returns from the reverse pull unlocking section C to the forward pull cycle section A, thereby enabling the first curtain rotating shaft 91 and the second curtain rotating shaft 93 to continue to rotate in the forward direction.

[0024] As a preferred option, such as Figure 9-10As shown, the linkage assembly 95 includes a third housing 951, a sliding plate 952, a return spring 953, a hinge seat 954, a linkage bushing 955, a swing plate 956, a fourth gear 957, a fifth gear 958, a lifting rod 959, and a sixth gear 960. The bottom of the third housing 951 has a sliding groove radially toward the second curtain rotation shaft 93. The sliding plate 952 is limited within the sliding groove. The upper limit of the third housing 951 has a lifting rod 959 that can only move up and down. The bottom of the lifting rod 959 abuts against the swing plate 956. The bottom of the top rail 1 has a first thread hole 1 corresponding to the position of the lifting rod 959. 1. The bottom of the third housing 951 is provided with a second thread hole 9511 corresponding to the cord brake assembly 96. The sliding plate 952 is provided with a third thread hole 9521 that is offset from the first thread hole 11. One end of the second curtain cord 7 and the first curtain cord 8 passes through the first thread hole 11, the second thread hole 9511 and the third thread hole 9521 in sequence and is then wound onto the cord brake assembly 96. The return spring 953 is disposed between the sliding plate 952 and the third housing 951. When the second curtain cord 7 and the first curtain cord 8 are in a straightened state, the tension generated pushes the sliding plate 952 to compress the return spring 953, so that the second thread hole 9511... Aligned with the third thread hole 9521, and using the hinge seat 954 to generate a swinging force on the swing plate 956, thereby disengaging the fifth gear 958 from the sixth gear 960. An elastic diaphragm is installed on the first thread hole 11, which protrudes in the corresponding direction when the second curtain cord 7 and the first curtain cord 8 are pulled. The bottom of the lifting rod 959 abuts against the elastic diaphragm. The fourth gear 957 is fixedly mounted on the linkage sleeve 955. The fifth gear 958 is hinged to the swing plate 956 and meshes with the fourth gear 957. The sixth gear 960 is sleeved on the second curtain rotation shaft 93. When the swing plate 956 rotates towards the second curtain... When shaft 93 swings, the fifth gear 958 meshes with the sixth gear 960. When the lifting rod 959 rises as the elastic diaphragm bulges upward and lifts the swing plate 956, the fifth gear 958 and the sixth gear 960 are disengaged. In the first curtain open state, the second curtain cord 7 and the first curtain cord 8 are in the unwinding state, causing the lifting rod 959 to descend, keeping the fifth gear 958 and the sixth gear 960 engaged. In the second curtain open state, the second curtain cord 7 remains stationary, while the first curtain cord 8 is in the winding state, causing the lifting rod 959 to rise and lift the swing plate 956, disengaging the fifth gear 958 and the sixth gear 960.In the second curtain retracted state, the second curtain cord 7 remains stationary, while the first curtain cord 8 is in the unwinding state. However, at this time, the second curtain rotating shaft 93 rotates clockwise. The meshing torque between the fifth gear 958 and the sixth gear 960 is less than the torque driving the first curtain rotating shaft 91. This causes the fifth gear 958 to rotate around the first curtain rotating shaft 91 due to the thrust of the sixth gear 960. Furthermore, gravity causes the fifth gear 958 to strike the sixth gear 960, resulting in the effect that only the second curtain rotating shaft 93 rotates. In the first curtain retracted state, the second curtain cord 7 and the first curtain cord 8 are in the retracted state. Although the meshing force of the fifth gear 958 and the sixth gear 960 is greater than the force of the lifting rod 959, the fifth gear 958 and the sixth gear 960 remain meshed. As a preferred option, such as Figure 10 As shown, the rope brake assembly 96 includes a brake drum 961, a rotating drum 962, a brake bushing 963, and a brake protrusion 964; the brake drum 961 is arranged parallel to the rotating drum 962; one end of the brake bushing 963 enters one end of the brake drum 961, and the brake drum 961 is hinged; an inclined groove 9611 is provided at the end of the brake drum 961 near the brake bushing 963; a wedge-shaped brake block 9631 is arranged in a circular array at the end of the brake bushing 963 away from the brake bushing 963, and a brake limiting block 9632 is provided at the other end corresponding to the inclined groove 9611; the brake... The brake protrusion 964 is disposed on the third housing 951. The brake protrusion 964 is also spaced apart from the wedge-shaped brake block 9631. After the action of pulling the pull bead 6 is completed, the bottom rail 2 and the middle rail 3 pull down the second curtain cord 7 and the first curtain cord 8, causing the brake drum 961 to rotate actively. This causes the inclined groove 9611 to move relative to the brake protrusion 964, thereby pushing the brake protrusion 964 and the brake bushing 963 to move radially. Subsequently, the wedge-shaped brake block 9631 on the brake bushing 963 abuts against the brake protrusion 964, thereby stopping the brake drum 961 from rotating, thus realizing automatic braking when the curtain falls.

[0025] Preferably, the brake drum 961 and the rotating drum 962 are arranged in a conical shape to facilitate the winding of the second curtain rope 7 and the first curtain rope 8 on the brake drum 961.

[0026] Preferably, the cross-sections of the second curtain rotating shaft 93 and the first curtain rotating shaft 91 are polygonal. In this embodiment, the cross-sections of the second curtain rotating shaft 93 and the first curtain rotating shaft 91 are hexagonal.

[0027] As a preferred option, such as Figure 11As shown, the end-limiting assembly 99 includes a fourth housing 991, a first helical gear 992, a second helical gear 993, an externally threaded bushing 994, and an internally threaded bushing 995. One end of the externally threaded bushing 994 is hinged to the fourth housing 991, and the other end is hinged to the first helical gear 992. One end of the first helical gear 992 is hinged to the fourth housing 991. The second helical gear 993 is disposed beside the first helical gear 992 and meshes with it. The axis of the second helical gear 993 intersects with that of the first helical gear 992. Both ends of the second helical gear 993 are hinged to and limited by the fourth housing 991. The fourth housing 991 has a second helical gear 995 corresponding to the externally threaded bushing 994. The limiting groove is provided, and the internal threaded bushing 995 is sleeved on the external threaded bushing 994 and extends outward into the second limiting groove. The external threaded bushing 994 rotates with the second curtain rotating shaft 93, and the internal threaded bushing 995 moves toward the first helical gear 992 under the transmission action of the thread. When the internal threaded bushing 995 abuts against the first helical gear 992, the second curtain retracts to its minimum range. At this time, the internal threaded bushing 995 and the external threaded bushing 994 together generate torque on the first helical gear 992, and the first helical gear 992 generates torque on the second helical gear 993. Since the second helical gear 993 is limited, it pushes the first helical gear 992 in the opposite direction to generate radial thrust toward the external threaded bushing 994 and the second curtain rotating shaft 93.

[0028] The main technical advantages of this utility model are: by coordinating the operation of the control assembly with the rope wheel and the pull bead, a single-rope control of the curtain can achieve a single-cycle operation of opening the first curtain, opening the second curtain, closing the second curtain, and closing the first curtain. Compared with existing curtains, this is simpler, more beautiful, easier to operate, and has a high degree of integration.

[0029] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A horizontally folding, automatically descending double-layer curtain system with single-cycle beaded control, characterized in that, The system includes a top rail, a bottom rail, a middle rail, a first curtain, a second curtain, a beaded cord, a first curtain cord, a second curtain cord, and a control assembly. The control assembly is located inside the top rail. One end of the control assembly is wound with a beaded cord. One end of the second and first curtain cords is wound inside the control assembly. The other end of the second curtain cord is fixedly installed to the bottom rail. The first curtain cord is fixedly installed to the middle rail, which is located below the top rail. The bottom rail is located below the middle rail. The second curtain is folded and installed between the bottom and middle rails, and the first curtain is folded and installed between the middle and top rails. By pulling the individual beaded cords, the second and first curtain cords within the control assembly can be simultaneously released, simultaneously retracted, individually released, and individually retracted, thereby enabling the opening and closing of both the first and second curtains.

2. The double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle beaded loop as described in claim 1, characterized in that, The control assembly includes a first curtain rotation shaft, a sheave, a second curtain rotation shaft, a reversing assembly, a linkage assembly, a coil brake assembly, a damping assembly, a locking assembly, and an end-stop assembly. Both the second and first curtain rotation shafts pass through the linkage assembly, at least two coil brake assemblies, the damping assembly, and the locking assembly. One end of the second curtain rotation shaft is connected to the end-stop assembly, and the other end is connected to the first output end of the reversing assembly. One end of the first curtain is hinged to the top rail, and the other end is connected to the second output end of the reversing assembly. The input end of the reversing assembly is connected to the sheave. The control assembly includes a first curtain open state, a first curtain closed state, and a second... The control assembly enters the first curtain unfolded state and the second curtain retracted state when both the first and second curtains are retracted. Upon first pulling down the pull bead, the control assembly enters the first curtain unfolded state. The reversing component outputs torque to the first curtain's rotating shaft via the second output terminal. The linkage component is in a state where the first and second curtain's rotating shafts are linked. At this time, both the second and first curtain cords are in the unwinding state, and both the bottom and middle rails descend. The first curtain unfolds as the middle rail descends. When the first curtain is unfolded to its maximum extent and the pull bead is pulled down in the opposite direction for the first time, the control assembly enters the second curtain unfolded state. The reversing component outputs torque via the first output terminal. The second curtain rotating shaft is connected to the first curtain rotating shaft, and the linkage component is in a disconnected state. The first curtain rotating shaft is locked by the locking component, causing the bottom rail to stop. At this time, the second curtain rotating shaft rotates in the opposite direction, causing the cord brake component to wind up the second curtain cord, causing the middle rail to rise, thereby opening the second curtain and retracting the first curtain. When it rises to a preset height, releasing the pull bead locks the second curtain rotating shaft by the locking component. When the pull bead is pulled forward a second time, the locking component can reverse to release the locking state of the second curtain rotating shaft, thus entering the second curtain retracting state. The curtain shaft continues to rotate in the opposite direction, thereby releasing the first curtain cord, causing the center rail to descend, which in turn causes the second curtain to retract while the first curtain unfolds. When the second curtain is lowered to its maximum extent, the end limiting component pushes the second curtain shaft to move radially, causing the reversing component to switch the torque from the first output end to the second output end. Thus, when the pull bead is pulled in the opposite direction for the second time, the first curtain enters the retracted state. At this time, the linkage component is on the turntable where the first curtain shaft and the second curtain shaft are linked. At this time, the second curtain cord and the first curtain cord are in the retracted state, causing the bottom rail and the center rail to rise, and the first curtain retracts as the center rail rises.

3. The double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle beaded loop as described in claim 2, characterized in that, The reversing assembly includes a first housing, a reduction gear set, a reversing input shaft, a first rotating disk, a second rotating disk, a first gear, a second gear, a first output shaft sleeve, and a second output shaft sleeve. The rope pulley is hinged within the first housing, and a third gear is disposed beside the rope pulley. The input end of the reduction gear set meshes with the third gear, and the output end of the reduction gear set is fixedly connected to the reversing input shaft. The reversing input shaft, the first rotating disk, the first gear, and the first output shaft sleeve are arranged on the extended axis of the second curtain rotating shaft, and the second gear and the second output shaft sleeve are arranged on the extended axis of the first curtain rotating shaft. A first axial groove is provided on the reversing input shaft, and the first rotating disk is limited within the first axial groove. The first output shaft sleeve... A second rotating disk is fixedly mounted on a bushing. A limiting bushing is provided on the second rotating disk. A pusher parallel to the second rotating disk is sleeved on the limiting bushing. A spring is provided between the pusher and the second rotating disk. The first gear is hinged to one end of the reversing input shaft near the reduction gear set. An elastic limiting slider is provided on the first housing corresponding to the position of the first rotating disk. A first limiting track and a second limiting track are provided on the first rotating disk corresponding to the elastic limiting slider. Wedge-shaped protrusions are arranged in an array on both sides of the first rotating disk. A wedge-shaped protrusion is also provided on the side of the second rotating disk near the first rotating disk. A wedge-shaped protrusion is also provided on the side of the first gear near the first rotating disk. The second gear is meshed with the first gear.

4. The double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle beaded loop as described in claim 2, characterized in that, The locking assembly includes a second housing and an inner bushing, an outer bushing, a movable ball, and a buffer spring mirror-displayed within the second housing. The inner bushing is hinged to the second housing, and the outer bushing is sleeved on the inner bushing. One end of the buffer spring is disposed on the inner bushing, and the other end is sleeved on and fixed to the outer bushing. The outer bushing can only rotate unidirectionally relative to the inner bushing. A first cyclic limiting groove for accommodating the movable ball is formed on the circumferential surface of the outer bushing. A straight groove for accommodating the movable ball is formed inside the second housing, such that half of the movable ball is located in the first cyclic limiting groove, and the other half is located in the straight groove. The first cyclic limiting groove includes a forward pulling cyclic section, a reverse locking section, and a... The reverse-pull unlocking section: When the pull bead is pulled, the outer and inner bushings rotate with the second or first curtain rotating shaft. At this time, the movable ball remains within the forward-pulling cycle section. When the pulling action stops or the pull bead is released, the weight of the bottom and middle rails causes the second and first curtain rotating shafts to rotate in opposite directions. At this time, the movable ball moves in the reverse direction into the reverse-locking section, thus preventing the second and first curtain rotating shafts from continuing to rotate. When the pull bead is continuously pulled in the reverse direction, the movable ball moves from the reverse-locking section into the reverse-pull unlocking section. Thus, by utilizing the fact that the outer bushing can only rotate in one direction relative to the inner bushing, the first and second curtain rotating shafts can rotate in opposite directions. When it is necessary to continue pulling the pull bead forward, the pull bead must first be pulled in the opposite direction, so that the movable ball enters the reverse pull unlocking section from the reverse locking section. Then, continue to pull the pull bead forward, so that the movable ball returns from the reverse pull unlocking section to the forward pull cycle section, thereby enabling the first curtain rotation shaft and the second curtain rotation shaft to continue to rotate in the forward direction.

5. The double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle beaded loop as described in claim 4, characterized in that, The linkage assembly includes a third housing, a sliding plate, a return spring, a hinge seat, a linkage bushing, a swing plate, a fourth gear, a fifth gear, a lifting rod, and a sixth gear. The bottom of the third housing has a sliding groove radially towards the rotation axis of the second curtain. The sliding plate is positioned within the sliding groove. The upper limit of the third housing has a lifting rod that can only move up and down. The bottom of the lifting rod abuts against the swing plate. The bottom of the top rail has a first thread hole corresponding to the position of the lifting rod. The bottom of the third housing has a second thread hole corresponding to the cord brake assembly. The sliding plate has a third thread hole offset from the first thread hole. One end of the second curtain cord and one end of the first curtain cord pass through the first thread hole, the second thread hole, and the third thread hole, respectively. The second and third thread guide holes are subsequently wound onto the cord brake assembly; the return spring is disposed between the sliding plate and the third housing; an elastic diaphragm is covered and installed on the first thread guide hole, which protrudes in the corresponding direction when the second and first curtain cords are pulled; the bottom of the lifting rod abuts against the elastic diaphragm; the fourth gear is fixedly mounted on the linkage bushing; the fifth gear is hinged to the swing plate and meshes with the fourth gear; the sixth gear is sleeved on the second curtain rotation shaft; when the swing plate swings toward the second curtain rotation shaft, the fifth gear meshes with the sixth gear; when the lifting rod rises as the elastic diaphragm protrudes upward and lifts the swing plate, the fifth gear disengages from the sixth gear.

6. The double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle beaded loop as described in claim 5, characterized in that, The rope brake assembly includes a brake drum, a rotating drum, a brake bushing, and a brake protrusion; the brake drum is arranged parallel to the rotating drum; one end of the brake bushing enters one end of the brake drum, and the brake drum is hinged; an inclined groove is provided at the end of the brake drum near the brake bushing; a wedge-shaped brake block is arranged in a circular array at the end of the brake bushing away from the brake bushing, and a brake limiting block is provided at the other end corresponding to the inclined groove; the brake protrusion is disposed on the third housing, and the brake protrusion is also spaced apart from the wedge-shaped brake block.

7. A double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle beaded loop as described in claim 6, characterized in that, The brake drum and the rotating drum are arranged in a conical shape.

8. A double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle beaded loop as described in claim 2, characterized in that, The cross-sections of the second curtain rotation axis and the first curtain rotation axis are polygonal.

9. A double-layer curtain system with horizontal folding and automatic lowering controlled by a single-cycle beaded loop as described in claim 2, characterized in that, The end-positioning component includes a fourth housing, a first helical gear, a second helical gear, an external threaded bushing, and an internal threaded bushing. One end of the external threaded bushing is hinged to the fourth housing, and the other end is hinged to the first helical gear. One end of the first helical gear is hinged to the fourth housing. The second helical gear is disposed beside the first helical gear and meshes with it. The axes of the second helical gear and the first helical gear intersect. Both ends of the second helical gear are hinged to and positioned by the fourth housing. The fourth housing has a second positioning groove corresponding to the external threaded bushing. The internal threaded bushing is sleeved on the external threaded bushing and extends outward into the second positioning groove.

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