Curtain lifting control device and curtain

Abstract

The embodiment of the utility model provides a curtain lifting control device and a curtain, the device comprises two rope winding assemblies assembled on an upper beam, each rope winding assembly comprises a base, a rope winding drum, a bearing rope and a power assembly, and the outer end of the bearing rope is connected to a curtain body; each base is provided with an upper rope penetrating hole, a lower rope penetrating hole and a guide rod, and the outer end of the bearing rope penetrates through the upper rope penetrating hole, bypasses the upper portion of the guide rod and then penetrates out of the lower rope penetrating hole. The device further comprises two brake wheels, and clamping grooves are formed in the outer wheel faces of the brake wheels. The two locking rods are arranged on the different bases and can slide back and forth between the low position and the high position, the section, located between the upper rope penetrating hole and the guide rod, of the bearing rope passes through the lower portion of the locking rods and keeps abutting against the locking rods, and the low position of the sliding stroke interval of the locking rods is lower than the top of the guide rod. And when the locking rod slides down to the low position, the locking rod is correspondingly clamped into the clamping groove of the brake wheel to lock the brake wheel. The embodiment of the utility model can prevent the curtain body from askew lifting.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of curtains, and in particular to a curtain lifting control device and a curtain. Background Art

[0002] An existing curtain lifting and lowering drive device comprises: two rope winding assemblies assembled on the upper beam of the curtain at a predetermined interval, each rope winding assembly comprising a base, a rope winding drum pivotally mounted on the base and a bearing rope wound on the rope winding drum, the outer end of the bearing rope passes through the upper beam and extends downward and is connected to the curtain body of the curtain; and a power assembly assembled on the upper beam and driving the rope winding drums of the two rope winding assemblies to rotate synchronously through a transmission shaft.

[0003] During the specific implementation, the inventors found that the above-mentioned device had some defects when in use: since it is easy to apply unbalanced force to the curtain body when pulling the curtain body (for example, pulling the curtain body downward or lifting the curtain body upward at one end of the curtain body), the curtain body is skewed, so that the load-bearing rope connected to one end of the curtain body is tightened while the load-bearing rope connected to the other end of the curtain body is loose, the forces on both ends of the curtain body are unbalanced, the smoothness of lifting and lowering is poor, and the loose load-bearing rope is also prone to accidental entanglement, affecting the normal use of the curtain. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a curtain lifting control device which can prevent the curtain body from being lifted or lowered crookedly.

[0005] The technical problem to be further solved by the embodiments of the utility model is to provide a curtain that can prevent the curtain body from tilting and rising.

[0006] In order to solve the above technical problems, the embodiment of the utility model adopts the following technical solution: a curtain lifting control device, comprising:

[0007] Two rope winding assemblies assembled on the upper beam of the curtain at a predetermined interval, each rope winding assembly comprising a base, a rope winding drum pivotally mounted on the base, and a load-bearing rope wound on the rope winding drum, the outer end of the load-bearing rope passes through the upper beam, extends downward, and is connected to the curtain body of the curtain; and

[0008] A power assembly assembled on the upper beam and driving the rope drums of the two rope winding assemblies to rotate synchronously through a transmission shaft;

[0009] Each of the bases is provided with an upper rope-threading hole and a lower rope-threading hole, which are located at the top and bottom of the base and are offset from each other, and a guide rod between the upper rope-threading hole and the lower rope-threading hole. The outer end of the carrying rope passes through the upper rope-threading hole from top to bottom, passes over the guide rod and then passes through the lower rope-threading hole.

[0010] The curtain lifting control device also includes:

[0011] Two brake wheels coaxially fixed to the transmission shaft and arranged one-to-one with the two bases, wherein the outer wheel surface of the brake wheel is provided with a plurality of slots arranged adjacent to each other in sequence along the circumference of the brake wheel; and

[0012] Two locking rods are respectively arranged on different bases and can slide back and forth between a low position and a high position and are used to lock a corresponding brake wheel respectively. The section of the carrying rope between the upper rope hole and the guide rod passes under the locking rod and remains in contact with the locking rod. The low position of the sliding travel range of the locking rod is lower than the top of the guide rod. When the locking rod slides down to the low position, it is correspondingly engaged in the groove of the brake wheel to lock the brake wheel.

[0013] Furthermore, a wire passing ring groove extending in a closed loop along the circumference of the brake wheel is provided in the middle of the outer wheel surface of the brake wheel, and the wire passing ring groove intersects and communicates with multiple slots in sequence. When the locking rod slides down to the low position, the load-bearing rope is pressed into the wire passing ring groove.

[0014] Furthermore, a pressing spring sheet is fixedly assembled on the base and elastically presses against the top surface of the locking rod to push the locking rod toward the lower position.

[0015] Furthermore, a receiving groove is formed at one end of the base, and the brake wheel, guide rod, locking rod and pressure spring are correspondingly arranged in the receiving groove, and the transmission shaft passes through the groove walls on the opposite sides of the receiving groove, and the groove walls on the opposite sides of the receiving groove are also respectively formed with a sliding groove for limiting the sliding direction of the locking rod.

[0016] Furthermore, the base includes a bottom box with an opening formed at the top and a mounting frame assembled at one end of the bottom box, the interior of the mounting frame penetrates from top to bottom to form the accommodating groove, the upper rope threading hole is formed on the top wall of the mounting frame, and the lower rope threading hole is formed on the bottom wall of the bottom box, and a fixed-point lead-out hole is also provided in the middle of the side wall of the bottom box near the opening, and the outer end of the load-bearing rope is led out from the rope drum, first passes through the fixed-point lead-out hole and then extends toward the upper rope threading hole.

[0017] Furthermore, a crossbeam corresponding to the groove walls on both sides of the accommodating groove is formed in the middle of the top notch of the accommodating groove, and the pressing spring sheet is assembled on the crossbeam with the aid of a spring sheet fixing block, and the elastic pressing end of the pressing spring sheet extends into the accommodating groove and presses against the top surface of the locking rod.

[0018] Furthermore, a positioning column is protruding from the top surface of the beam, a first positioning hole is formed at the fixed end of the pressure spring sheet, a second positioning hole is opened on the spring sheet fixing block, and both ends of the top notch of the accommodating groove also protrude toward the beam to form a hook, the pressure spring sheet and the spring sheet fixing block are respectively correspondingly mounted on the positioning column with the first positioning hole and the second positioning hole, and the opposite ends of the spring sheet fixing block are respectively clamped on the inner side of the hook and fixed relatively to the base to press the pressure spring sheet to be fixed on the beam.

[0019] Furthermore, the base also includes a cover plate that corresponds to the opening of the bottom box and covers the various components assembled in the bottom box. The load-bearing rope is also located on the inner side of the cover plate. The inner side surface of the cover plate is also provided with a convex rib that corresponds to the pressing on the spring fixing block.

[0020] On the other hand, in order to solve the above-mentioned further technical problems, the utility model further provides the following technical solutions: a curtain, comprising an upper beam, a curtain lifting control device assembled on the upper beam, and a curtain body arranged below the upper beam and connected to the curtain lifting control device, wherein the curtain lifting control device is a curtain lifting control device as described in any one of the above items.

[0021] Furthermore, the curtain body includes an upper curtain body and a lower curtain body arranged side by side up and down, and the curtain includes two curtain lifting control devices that are respectively connected to and control the upper curtain body and the lower curtain body. The two curtain lifting control devices are assembled side by side in the upper beam, and the bases belonging to the two curtain lifting control devices and located at the same end of the upper beam are connected as a whole.

[0022] By adopting the above technical scheme, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model coaxially fixes two brake wheels on the transmission shaft of the power assembly, and sets a locking rod which can slide back and forth between a low position and a high position on the base of each rope winding assembly corresponding to each brake wheel, and makes the load-bearing rope pass under the locking rod and keep contact with the locking rod, thereby, when the uneven force is applied when pulling down the curtain body causes any load-bearing rope to relax, or when there is an external force in the process of raising the curtain body, causing the curtain body to rise unbalancedly and also causing any load-bearing rope to relax, the corresponding locking rod will slide to the low position and fall into the clamping groove of the brake wheel to jam the brake wheel, thereby preventing the transmission shaft from rotating and transmitting, and the entire curtain body cannot continue to rise and fall, and only when the two load-bearing ropes are effectively straightened and tightened, each load-bearing rope forces the corresponding locking rod to move to the high position and disengage from the brake wheel, the transmission shaft is not restricted and can be transmitted normally, and the curtain body will be raised and lowered normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a structural schematic diagram of a partially disassembled state of an optional embodiment of the curtain lifting control device of the utility model.

[0024] Figure 2 It is a structural schematic diagram of a partially disassembled state of another optional embodiment of the curtain lifting control device of the utility model.

[0025] Figure 3 It is a structural schematic diagram of a disassembled state of a part of the curtain lifting control device of the utility model which is assembled on a mounting frame.

[0026] Figure 4 It is a structural schematic diagram of a combined state in which a part of the curtain lifting control device of the utility model is assembled on a mounting frame.

[0027] Figure 5 The utility model is a planar cross-sectional schematic diagram of a locking rod and a brake wheel in a curtain lifting control device in a meshing state.

[0028] Figure 6 The utility model is a planar cross-sectional schematic diagram of a curtain lifting control device in which a locking rod and a brake wheel are in a disengaged state.

[0029] Figure 7 It is a planar cross-sectional schematic diagram of another optional embodiment of the curtain lifting control device of the utility model, in which the locking rod and the brake wheel are in a disengaged state.

[0030] Figure 8 It is a structural schematic diagram of an optional embodiment of the curtain of the utility model.

[0031] Fig. 9 The utility model is a schematic plan cross-sectional view of a curtain in which two locking rods and brake wheels of a curtain lifting control device are in a disengaged state in an optional embodiment of the curtain. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present invention may be combined with each other without conflict.

[0033] like Figure 1-Figure 6 As shown, an optional embodiment of the utility model provides a curtain lifting control device, comprising:

[0034] Two rope winding assemblies assembled on the upper beam 10 of the curtain at a predetermined interval, each rope winding assembly comprising a base 11, a rope winding drum 12 pivotally mounted on the base 11, and a load rope 13 wound around the rope winding drum 12, the outer end of the load rope 13 passes through the upper beam 10, extends downward, and is connected to the curtain body 100 of the curtain; and

[0035] A power assembly 3 assembled on the upper beam 10 and driving the rope drums 12 of the two rope winding assemblies to rotate synchronously through the transmission shaft 2;

[0036] Each of the bases 11 is provided with an upper rope-threading hole 111 and a lower rope-threading hole 112, which are located at the top and bottom of the base 11 and are offset from each other, and a guide rod 113 between the upper rope-threading hole 111 and the lower rope-threading hole 112. The outer end of the carrying rope 13 passes through the upper rope-threading hole 111 from top to bottom, passes over the guide rod 113, and then passes through the lower rope-threading hole 112.

[0037] The curtain lifting control device also includes:

[0038] Two brake wheels 4 fixed coaxially with the transmission shaft 2 and arranged one-to-one with the two bases 11, wherein the outer wheel surface of the brake wheel 4 is provided with a plurality of slots 40 arranged adjacent to each other in sequence along the circumference of the brake wheel 4; and

[0039] Two locking rods 5 are respectively arranged on different bases 11 and can slide back and forth between a low position and a high position and are used to lock a corresponding brake wheel 4 respectively. The section of the carrying rope 13 located between the upper rope threading hole 111 and the guide rod 113 passes under the locking rod 5 and remains in contact with the locking rod 5. The low position of the sliding stroke range of the locking rod 5 is lower than the top of the guide rod 113. When the locking rod 5 slides down to the low position, it is correspondingly engaged in the slot 40 of the brake wheel 4 to lock the brake wheel 4.

[0040] In the embodiment of the utility model, two brake wheels 4 are coaxially fixed on the transmission shaft 2 of the power assembly 3, and a locking rod 5 that can slide back and forth between a low position and a high position is arranged on the base 11 of each rope winding assembly corresponding to each brake wheel 4, and the load rope 13 passes under the locking rod 5 and keeps contact with the locking rod 5, so that when the uneven force is applied when the curtain body 100 is pulled down, causing any one of the load ropes 13 to relax, or when an external force is applied during the process of raising the curtain body 100, When the curtain body 100 rises unbalancedly and causes any one of the load-bearing ropes 13 to relax, the corresponding locking rod 5 will slide to a low position and fall into the slot 40 of the brake wheel 4 to jam the brake wheel 4, thereby preventing the transmission shaft 2 from rotating and transmitting. The entire curtain body 100 cannot continue to rise or fall. Only when the two load-bearing ropes 13 are effectively straightened and tightened, each load-bearing rope 13 forces the corresponding locking rod 5 to move to a high position and disengage from the brake wheel 4, the transmission shaft 2 is not restricted and can transmit normally, and the curtain body 100 will rise or fall normally.

[0041] In a specific implementation, the rope winding assembly also includes an externally threaded tube 14, one end of which is inserted into the axial hole of the rope winding drum 12 and the other end is correspondingly fixed on the base 11, the transmission shaft 2 passes through the center hole of the externally threaded tube 14, the rope winding drum 12 is correspondingly threadedly connected to the externally threaded tube 14 and is also relatively fixed to the transmission shaft 2 in the circumferential direction, so that the rope winding drum 12 is driven by the transmission shaft 2 to rotate and move axially relative to the externally threaded tube 14 to realize the retraction and release of the load-bearing rope 13, and then the maximum unwinding length of the curtain body 100 is limited by limiting the length of the rope winding drum 12 to retract and release the load-bearing rope 13.

[0042] In another embodiment of the present invention, Figure 3 As shown, a wire-passing ring groove 41 extending in a closed loop along the circumference of the brake wheel 4 is provided in the middle of the outer wheel surface of the brake wheel 4, and the wire-passing ring groove 41 intersects and communicates with the plurality of the clamping grooves 40 in sequence, and the load-bearing rope 13 is pressed into the wire-passing ring groove 41 when the locking rod 5 slides down to the low position. In this embodiment, by providing a wire-passing ring groove 41 intersecting and communicating with the plurality of the clamping grooves 40 in sequence on the outer wheel surface of the brake wheel 4, when the locking rod 5 is in the low position and clamped into the clamping groove 40, the load-bearing rope 13 can be pressed into the wire-passing ring groove 41, thereby avoiding interference between the load-bearing rope 13 and the brake wheel 4, and having high reliability. In specific implementation, a sprocket wheel can be used as the brake wheel 4.

[0043] In another embodiment of the present invention, Figure 3 and Figure 5As shown, the base 11 is also fixedly assembled with a corresponding pressing spring piece 114 that elastically presses against the top surface of the locking rod 5 to push the locking rod 5 toward the low position. In this embodiment, the pressing spring piece 114 is arranged above the locking rod 5 to apply force to push the locking rod 5 to move toward the low position. When the carrying rope 13 is not pulled and tightened, the pressing spring piece 114 can react in real time to prompt the locking rod 5 to quickly move down to the low position and then fall into and remain in the slot 40 of the brake wheel 4, thereby locking the transmission shaft 2 to prevent the curtain body 100 from continuing to rise and fall unbalancedly. Moreover, when the curtain body 100 is raised and lowered, it is necessary to apply a slightly larger pulling force so that the reverse thrust applied by the carrying rope 13 on the locking rod 5 is sufficient to overcome the elastic pressing force of the pressing spring piece 114 and the weight of the locking rod 5 itself, so that the locking rod 5 can be moved out of the slot 40, thereby preventing the curtain body 100 from being pulled due to accidental touch.

[0044] In another embodiment of the present invention, Figures 3 to 7 As shown, a receiving groove 115 is formed at one end of the base 11, and the brake wheel 4, guide rod 113, locking rod 5 and pressure spring piece 114 are correspondingly arranged in the receiving groove 115, and the transmission shaft 2 passes through the groove walls on the opposite sides of the receiving groove 115, and the groove walls on the opposite sides of the receiving groove 115 are respectively formed with a slide groove 1150 for limiting the sliding direction of the locking rod 5. In this embodiment, by providing the receiving groove 115 inside the base 11, the brake wheel 4, the guide rod 113, the locking rod 5 and the pressure spring piece 114 can be effectively accommodated, and the slide groove 1150 formed on the groove walls on the opposite sides of the receiving groove 115 can effectively guide and limit the sliding of the guide rod 113 to prevent the guide rod 113 from deflecting. In a specific implementation, it can be as follows Figure 5 and Figure 6 The slide groove 1150 shown extends perpendicularly to the bottom surface of the base 11, and can also be Figure 7 The shown slide groove 1150 extends in a direction having a predetermined inclination angle with the bottom surface of the base 11. When extending obliquely, the extension direction of the slide groove 1150 can be designed in combination with the direction of the thrust applied by the load-bearing rope 13 to the locking rod 5 when the load-bearing rope 13 is pulled. Preferably, the extension direction of the slide groove 1150 is designed to be consistent with the direction of the thrust applied by the load-bearing rope 13 to the locking rod 5, which can relatively save effort and reduce structural wear.

[0045] In another embodiment of the present invention, Figure 2As shown, the base 11 includes a bottom box 116 with an opening formed at the top and a mounting frame 117 assembled at one end of the bottom box 116. The interior of the mounting frame 117 is penetrated from top to bottom to form the accommodating groove 115. The upper rope threading hole 111 is formed on the top wall of the mounting frame 117, and the lower rope threading hole 112 is formed on the bottom wall of the bottom box 116. A fixed-point lead-out hole 1161 is also provided in the middle of the side wall of the bottom box 116 near the opening. After the outer end of the carrying rope 13 is led out from the rope drum 12, it first passes through the fixed-point lead-out hole 1161 and then extends toward the upper rope threading hole 111. This embodiment designs the base 11 as a separate and assembled bottom box 116 and mounting frame 117, thereby facilitating the design and molding of the base 11 and the detailed structures thereon; in addition, the fixed-point lead-out holes 1161 provided on the bottom box 116 can reasonably utilize the space of the base 11 for threading layout, and smoothly guide the load-bearing rope 13 extending from the rope drum 12 to the upper rope threading hole 111, making the wiring more regular.

[0046] In another embodiment of the present invention, Figure 3 and Figure 5 As shown, a crossbeam 1151 corresponding to the groove walls on opposite sides of the accommodating groove 115 is formed in the middle of the top notch of the accommodating groove 115, and the pressing spring piece 114 is assembled on the crossbeam 1151 by means of a spring piece fixing block 118. The elastic pressing end of the pressing spring piece 114 extends into the accommodating groove 115 and presses on the top surface of the locking rod 5. In this embodiment, the crossbeam 1151 is formed on the accommodating groove 115, so as to facilitate the stable and effective assembly of the pressing spring piece 114.

[0047] In another embodiment of the present invention, Figure 3 and Figure 5As shown, a positioning column 1152 is protruding from the top surface of the beam 1151, a first positioning hole 1140 is formed at the fixed end of the pressure spring sheet 114, and a second positioning hole 1180 is formed on the spring sheet fixing block 118. The two ends of the top notch of the accommodating groove 115 also protrude toward the beam 1151 to form a hook 1153. The pressure spring sheet 114 and the spring sheet fixing block 118 are respectively correspondingly sleeved on the positioning column 1152 with the first positioning hole 1140 and the second positioning hole 1180, and the opposite ends of the spring sheet fixing block 118 are respectively clamped on the inner side of the hook 1153 and fixed relatively to the base 11 to press the pressure spring sheet 114 to be fixed on the beam 1151. In this embodiment, the positioning column 1152 cooperates with the corresponding first positioning hole 1140 and the second positioning hole 1180 to quickly position the pressure spring sheet 114 and the spring sheet fixing block 118 on the beam 1151, and the opposite ends of the spring sheet fixing block 118 are also respectively connected with the hooks 1153 provided at the two ends of the accommodating groove 115 in a one-to-one snap connection, so that the spring sheet fixing block 118 can be firmly assembled on the beam 1151, and the pressure spring sheet 114 is also pressed and fixed on the beam 1151 at the same time, the assembly operation is simple, and the structural stability is good. In a specific implementation, the two end portions of the spring clip fixing block 118 and the matching portions of the hook 1153 are designed with guiding slopes, so that when assembling the spring clip fixing block 118, the two ends of the spring clip fixing block 118 are effectively guided to slide relative to the corresponding hook 1153 and elastically deform to be stuck in the inner side of the hook 1153, and after the spring clip fixing block 118 is stuck in the inner side of the hook 1153 and restores the deformation, it can also maintain good abutment with the corresponding hook 1153 without looseness.

[0048] In another embodiment of the present invention, Figure 3 and Figure 5 As shown, the base 11 further includes a cover plate 119 correspondingly covering the opening of the bottom box 116 and correspondingly covering the various components assembled in the bottom box 116, and the carrying rope 13 is also correspondingly located on the inner side of the cover plate 119, and the inner side of the cover plate 119 is further provided with a convex rib 1190 correspondingly pressed against the spring sheet fixing block 118. In this embodiment, by further providing the cover plate 119, the components assembled in the bottom box 116 can be covered to prevent the normal movement of the movable components in the bottom box 116 from being affected by foreign objects, thereby improving safety; in addition, the convex rib 1190 provided on the inner side of the cover plate 119 can effectively press against the spring sheet fixing block 118 to further fix the pressing spring sheet 114.

[0049] On the other hand, Figure 1As shown, the utility model also provides a curtain, including an upper beam 10, a curtain lifting control device assembled on the upper beam 10, and a curtain body 100 arranged below the upper beam 10 and connected to the curtain lifting control device, wherein the curtain lifting control device is a curtain lifting control device as described in any one of the above embodiments. The curtain of the embodiment of the utility model adopts the curtain lifting control device as described in any one of the above embodiments, which can prevent the curtain from being skewed during the lifting process of the curtain body 100.

[0050] It should be noted that although Figure 1 The curtain shown is a honeycomb curtain, but the curtain lifting control device provided in the embodiment of the utility model can also be applied to curtains such as blinds and Roman blinds.

[0051] In another embodiment of the present invention, in order to further realize the lifting and lowering control of the curtain body 100 of the segmented curtain, as shown in FIG. Figure 8 and Fig. 9 As shown, the curtain body 100 includes an upper curtain body 101 and a lower curtain body 102 arranged side by side, and the curtain includes two curtain lifting control devices correspondingly connected to and controlling the upper curtain body 101 and the lower curtain body 102, and the two curtain lifting control devices are assembled side by side in the upper beam 10, and the bases 11 belonging to the two curtain lifting control devices and located at the same end of the upper beam 10 are connected as a whole. In this embodiment, two curtain lifting control devices are provided to connect the upper curtain body 101 and the lower curtain body 102 to drive the upper curtain body 101 and the lower curtain body 102 to move respectively, so as to achieve different shielding effects on the window. In addition, by correspondingly connecting the bases 11 belonging to the two curtain lifting control devices and located at the same end of the upper beam 10, specifically, the base box 116 corresponding to the base 11 can be integrated into one component for integrated molding, and the mounting frame 117 is also correspondingly connected as one component for integrated molding, thereby reducing the number of components and facilitating manufacturing and assembly. The upper curtain body 101 and the lower curtain body 102 may correspond to honeycomb curtain bodies, venetian blind curtain bodies, Roman curtain bodies, etc.

[0052] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many variations without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A curtain lifting control device, comprising: Two rope winding assemblies assembled on the upper beam of the curtain at a predetermined interval, each rope winding assembly comprising a base, a rope winding drum pivotally mounted on the base, and a load-bearing rope wound on the rope winding drum, the outer end of the load-bearing rope passes through the upper beam, extends downward, and is connected to the curtain body of the curtain; and A power assembly assembled on the upper beam and driving the rope drums of the two rope winding assemblies to rotate synchronously through a transmission shaft; characterized in that: Each of the bases is provided with an upper rope-threading hole and a lower rope-threading hole, which are located at the top and bottom of the base and are offset from each other, and a guide rod between the upper rope-threading hole and the lower rope-threading hole. The outer end of the carrying rope passes through the upper rope-threading hole from top to bottom, passes over the guide rod and then passes through the lower rope-threading hole. The curtain lifting control device also includes: Two brake wheels coaxially fixed to the transmission shaft and arranged one-to-one with the two bases, wherein the outer wheel surface of the brake wheel is provided with a plurality of slots arranged adjacent to each other in sequence along the circumference of the brake wheel; and Two locking rods are respectively arranged on different bases and can slide back and forth between a low position and a high position and are used to lock a corresponding brake wheel respectively. The section of the carrying rope between the upper rope hole and the guide rod passes under the locking rod and remains in contact with the locking rod. The low position of the sliding travel range of the locking rod is lower than the top of the guide rod. When the locking rod slides down to the low position, it is correspondingly engaged in the groove of the brake wheel to lock the brake wheel.

2. The curtain lifting control device according to claim 1, characterized in that: A wire passing ring groove extending in a closed loop along the circumference of the brake wheel is provided in the middle of the outer wheel surface of the brake wheel. The wire passing ring groove intersects and communicates with multiple clamping grooves in sequence. When the locking rod slides down to the low position, the load-bearing rope is pressed into the wire passing ring groove.

3. The curtain lifting control device according to claim 1, characterized in that: The base is also fixedly assembled with a pressing spring sheet which elastically presses against the top surface of the locking rod to push the locking rod toward the low position.

4. The curtain lifting control device according to claim 3, characterized in that: A receiving groove is formed at one end of the base, and the brake wheel, guide rod, locking rod and pressure spring are correspondingly arranged in the receiving groove. The transmission shaft passes through the groove walls on the opposite sides of the receiving groove, and the groove walls on the opposite sides of the receiving groove are respectively formed with sliding grooves for limiting the sliding direction of the locking rod.

5. The curtain lifting control device according to claim 4, characterized in that: The base includes a bottom box with an opening formed at the top and a mounting frame assembled at one end of the bottom box, the interior of the mounting frame penetrates from top to bottom to form the accommodating groove, the upper rope threading hole is formed on the top wall of the mounting frame, and the lower rope threading hole is formed on the bottom wall of the bottom box, and a fixed-point lead-out hole is also provided in the middle of the side wall of the bottom box near the opening, and the outer end of the carrying rope is led out from the rope drum, first passes through the fixed-point lead-out hole and then extends toward the upper rope threading hole.

6. The curtain lifting control device according to claim 5, characterized in that: A crossbeam corresponding to the groove walls on both sides of the accommodating groove is formed in the middle of the top notch of the accommodating groove, and the pressing spring sheet is assembled on the crossbeam with the help of a spring sheet fixing block. The elastic pressing end of the pressing spring sheet extends into the accommodating groove and presses on the top surface of the locking rod.

7. The curtain lifting control device according to claim 6, characterized in that: A positioning column is protruding from the top surface of the beam, a first positioning hole is formed at the fixed end of the pressure spring sheet, a second positioning hole is opened on the spring sheet fixing block, and both ends of the top notch of the accommodating groove also protrude toward the beam to form a hook, the pressure spring sheet and the spring sheet fixing block are respectively correspondingly sleeved on the positioning column with the first positioning hole and the second positioning hole, and the opposite ends of the spring sheet fixing block are respectively clamped on the inner side of the hook and fixed relatively to the base to press the pressure spring sheet to be fixed on the beam.

8. The curtain lifting control device according to claim 7, characterized in that: The base also includes a cover plate that corresponds to the opening of the bottom box and covers the various components assembled in the bottom box. The load-bearing rope is also located on the inner side of the cover plate. The inner side surface of the cover plate is also provided with a convex rib that corresponds to the pressing on the spring fixing block.

9. A curtain comprising an upper beam, a curtain lifting control device assembled on the upper beam, and a curtain body arranged below the upper beam and connected to the curtain lifting control device, characterized in that: The curtain lifting control device is the curtain lifting control device as described in any one of claims 1-8.

10. The curtain according to claim 9, characterized in that The curtain body includes an upper curtain body and a lower curtain body arranged side by side up and down, and the curtain includes two curtain lifting control devices which are respectively connected to and control the upper curtain body and the lower curtain body. The two curtain lifting control devices are assembled side by side in the upper beam, and the bases belonging to the two curtain lifting control devices and located at the same end of the upper beam are connected as a whole.

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