Rope winding module for venetian blind

Abstract

The utility model relates to the field of door and window design, and provides a rope winding module for a venetian blind.The rope winding module comprises a shell body, a side cover plate, a rope winding drum and a blade turning wheel, a first groove chamber and a second groove chamber are formed in the side face of one side of the shell body, and a first bearing used for containing the rope winding drum is arranged in the first groove chamber; a second support for placing the page turning wheel is arranged in the second groove chamber; the side cover plate is detachably installed on the shell body, a first clamping base and a second clamping base are arranged on the side face of the side cover plate, in the assembling state, the first bearing and the first clamping base jointly clamp and position the rope winding barrel, and the second bearing and the second clamping base jointly clamp and position the page turning wheel. On the basis, the assembling operation of the rope winder can be simplified, and the assembling efficiency and the production efficiency of the rope winder are improved.

Description

Technical Field

[0001] The present application relates to the field of door and window design, and in particular to a cord winding module for a venetian blind. Background Art

[0002] Built-in blinds insulating glass, also known as blinds, is a new energy-saving product that combines glass windows and blinds into one, which saves usage space and inconvenience, and achieves the comprehensive performance of insulating glass insulation and blinds sunshade.

[0003] The control methods of Venetian blinds mainly include manual control and electric control. Among them, the control module of electric Venetian blinds includes a Venetian blind motor, a transmission rod, a rope winder and a limiter. The transmission rod is passed through the rope winder and the limiter. The Venetian blind motor is fixedly connected to one end of the transmission rod to drive the transmission rod to rotate. The rope winder is used to reel in the pull cord of the Venetian blind to complete the lifting and flipping of the Venetian blind, and the limiter is used to limit the lifting and flipping of the Venetian blind, that is, the Venetian blind can stop moving after it is fully unfolded or fully folded.

[0004] The existing rope winder is usually installed inside the window frame of the blinds, and the overall volume is small. In addition, the rope winder has many parts and a complex structure, which leads to inconvenient assembly and low efficiency during production of the rope winder, which needs to be improved. Utility Model Content

[0005] Based on this, the present application provides a cord winding module for a Venetian blind, which can simplify the assembly operation of the cord winding device and improve the assembly efficiency and production efficiency of the cord winding device.

[0006] The present application provides a winding rope module for a venetian blind using the following technical solution:

[0007] A rope winding module for a venetian blind comprises a shell body, a side cover plate, a rope winding drum and a page turning wheel, a first slot chamber and a second slot chamber are provided on one side of the shell body, a first support for placing the rope winding drum is provided inside the first slot chamber, and a second support for placing the page turning wheel is provided inside the second slot chamber;

[0008] The side cover plate is detachably mounted on the shell body, and a first clamping seat and a second clamping seat are arranged on the side of the side cover plate. In the assembled state, the first support and the first clamping seat jointly clamp and position the rope drum, and the second support and the second clamping seat jointly clamp and position the page turning wheel.

[0009] By adopting the above-mentioned technical scheme, the present application forms an overall outer shell structure by combining the shell body and the side cover plate. During the specific assembly, the rope winding drum is placed on the first support, the page turning wheel is placed on the first support, and the remaining components are placed one by one at the corresponding positions of the shell body. Then, the side cover plate is covered on the shell body. The first clamping seat of the side cover plate can clamp the rope winding drum together with the first support to position the rope winding drum, and the second clamping seat of the side cover plate can clamp the page turning wheel together with the second support to position the rope winding drum, thereby quickly completing the one-time assembly and fixation of the internal components of the rope winding device, which can simplify the assembly operation of the rope winding device and improve the assembly efficiency and production efficiency of the rope winding device.

[0010] Optionally, a through hole is provided on the side of the side cover plate, and the shell body is provided with a quick-release assembly that cooperates with the through hole to limit the position; wherein the quick-release assembly includes a plurality of limiting plates arranged circumferentially, and each limiting plate is provided with a hook portion at one end away from the shell body, and when each limiting plate passes through the through hole, the hook portion abuts against the side of the side cover plate away from the shell body.

[0011] By adopting the above-mentioned technical scheme, by forcing each limiting plate to be inserted into the through hole, the hook portion at the end of the limiting plate can gradually abut against the inner wall of the through hole, thereby causing each limiting plate to gather and deform; after the hook portion passes through the through hole, each limiting plate is reset and opened, and the hook portion can abut against the side of the side cover away from the shell body, thereby realizing rapid assembly between the side cover and the shell body, and no auxiliary tools are required, which greatly improves the operating convenience of the assembler.

[0012] Optionally, there are multiple groups of quick-release components, and each group of quick-release components is respectively arranged around the shell body; the number of through holes is adapted to the number of quick-release components.

[0013] By adopting the above technical solution, the provision of multiple sets of quick-release components is conducive to improving the stability of the connection between the shell body and the side cover plate at various locations, thereby ensuring the production quality of the product.

[0014] Optionally, it further includes a guide rope mechanism, which includes a threaded rod and a guide seat, and the guide seat is provided with a threaded groove for the threaded rod to match and pass through;

[0015] A third support for placing the threaded rod is provided inside the first groove chamber, and a third clamping seat is provided on the side of the side cover plate. In the assembled state, the third support and the third clamping seat jointly clamp and position the threaded rod, and the side cover plate and the shell body respectively abut against two opposite sides of the guide seat;

[0016] A transmission assembly is provided between the threaded rod and the rope drum, which is used for automatically driving the threaded rod to rotate when the rope drum rotates.

[0017] By adopting the above technical solution, the present application can quickly position the threaded rod through the cooperation of the third support of the shell body and the third clamping seat of the side cover plate, which has the advantages of convenient assembly and high efficiency; and the rope drum and the threaded rod are connected by a transmission assembly, and when the rope drum rotates and the pull rope wound on the outer peripheral side of the rope drum is continuously wound, the threaded rod can rotate with the rope drum. By winding the pull rope around the guide seat, the rotation of the threaded rod can drive the guide seat to move along the axis direction of the rope drum, so that the pull rope is orderly wound around the outer peripheral side of the rope drum, reducing the occurrence of tangled wire.

[0018] Optionally, the transmission assembly includes a transition gear and two transmission gears, and the two transmission gears are respectively fixed to the rope drum and the threaded rod; limit slots are respectively provided on the opposite sides of the shell body and the side cover plate, and the transition gear is fixedly connected to the rotating shaft rod, and a limit wheel is fixed to the end of the rotating shaft rod away from the transition gear. In the assembled state, the limit wheel is clamped in the two limit slots, and the transition gear is meshed with the two transmission gears for transmission at the same time.

[0019] By adopting the above-mentioned technical solution, the installation of the transmission gear can be facilitated through the cooperation of the limiting wheel and the limiting slot, and when the side cover plate is installed on the shell body, the two can jointly position the limiting wheel, so that the transition gear can simultaneously engage with the two transmission gears for transmission, so that the rotation of the rope drum can smoothly drive the threaded rod to rotate, and then drive the guide seat to move along the axial direction of the rope drum.

[0020] Optionally, it further comprises a transmission rod, the cross-section of the transmission rod is polygonal, and the rope drum is coaxially provided with a first plug hole for the transmission rod to be matched and plugged in;

[0021] The page turning wheel is coaxially provided with an installation groove, a freely rotatable sleeve member is installed inside the installation groove, and the sleeve member is provided with a second plug hole for matching and plugging the transmission rod;

[0022] A limiting component for limiting the rotation angle of the page turning wheel is also provided on the outer side of the page turning wheel.

[0023] By adopting the above technical solution, the transmission rod is used to connect with the venetian blind motor inside the venetian blind. Since the transmission rod matches the first plug hole inserted in the rope drum, when the venetian blind motor runs and drives the transmission rod to rotate, the rope drum can rotate with the transmission rod, thereby controlling the lifting and lowering of the venetian blind. In addition, since the transmission rod matches the sleeve member inserted in the installation groove, at the initial stage of the rotation of the transmission rod, the friction between the sleeve member and the page-turning wheel can make the page-turning wheel rotate with the transmission rod, and after the page-turning wheel rotates a certain angle, the limit component of the page-turning wheel makes the page-turning wheel unable to continue to rotate. At this time, the venetian blind completes the flipping action, and the sleeve member idles relative to the page-turning wheel.

[0024] Optionally, the limiting component is protrudingly arranged on the outer peripheral surface of the page turning wheel, the shell body is provided with a first abutting portion, and the side cover plate is provided with a second abutting portion. When the limiting component abuts against the first abutting portion or the second abutting portion, the limiting component is in an extreme position.

[0025] By adopting the above technical solution, by setting the first abutment portion and the second abutment portion, after the transmission rod drives the page turning wheel to rotate, the limiting component can finally abut against the first abutment portion or the second abutment portion, so that the page turning wheel stops in position and the flipping action of the blind is completed.

[0026] Optionally, the shell body is provided with a first matching portion, and the side cover plate is provided with a second matching portion. In the assembled state, the first matching portion and the second matching portion are snap-fitted and adapted to limit lateral movement between the shell body and the side cover plate.

[0027] By adopting the above technical solution, the lateral offset between the shell body and the side cover plate can be limited through the cooperation of the first matching portion and the second matching portion, so that after the rope drum and the page turning wheel are installed, it is ensured that the two are in a coaxial state, which is conducive to the smooth installation of the transmission rod.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. When the side cover is closed on the shell body, the first clamping seat of the side cover can clamp and position the rope drum together with the first support, and the second clamping seat of the side cover can clamp and position the page turning wheel together with the second support, so as to quickly complete the one-time assembly and fixation of the internal components of the rope reel, simplify the assembly operation of the rope reel, and improve the assembly efficiency and production efficiency of the rope reel;

[0030] 2. By setting a plurality of limit plates, after the hooking parts pass through the through holes, each hooking part can be pressed against the side of the side cover plate away from the shell body, thereby realizing the rapid assembly between the side cover plate and the shell body without the aid of auxiliary tools, which greatly improves the operation convenience of the assembler;

[0031] 3. Through the cooperation of the first matching portion and the second matching portion, the lateral offset between the shell body and the side cover plate can be limited, so that after the installation of the rope drum and the page turning wheel is completed, it is ensured that the two are in a coaxial state, which is conducive to the smooth installation of the transmission rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is an exploded view of the side cover plate and the shell body in this embodiment;

[0033] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0034] Figure 3 is a schematic structural diagram of the shell body in this embodiment;

[0035] Figure 4 is a schematic structural diagram of the side cover plate in this embodiment;

[0036] Figure 5 It is a schematic diagram of the structure of the rope winding drum, the page turning wheel and the rope guiding mechanism in this embodiment;

[0037] Figure 6 is a schematic structural diagram of the transition gear in this embodiment;

[0038] Figure 7 yes Figure 5 Enlarged view of point B in the middle.

[0039] Description of reference numerals: 1, shell body; 11, first slot chamber; 12, second slot chamber; 13, first support; 14, second support; 15, third support; 16, quick release assembly; 161, limit plate; 162, hook portion; 17, first abutting portion; 18, first matching portion;

[0040] 2. Side cover; 21. Through hole; 22. First card seat; 23. Second card seat; 24. Third card seat; 25. Limiting card slot; 26. Second abutting part; 27. Second matching part; 3. Rope drum; 31. First plug hole; 4. Page turning wheel; 41. Mounting slot; 42. Sleeve member; 421. Second plug hole; 43. Limiting member;

[0041] 5. Transmission rod; 6. Guide rope mechanism; 61. Threaded rod; 62. Guide seat; 621. Threaded groove; 7. Transmission assembly; 71. Transition gear; 711. Rotating shaft rod; 712. Limiting wheel; 72. Transmission gear; 8. Flip rope; 9. Pull rope. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-7 This application is described in further detail.

[0043] The embodiment of the present application discloses a cord winding module for a venetian blind, which is used to be connected to a venetian blind motor to control the flipping and lifting of the venetian blind.

[0044] Reference Figure 1A rope winding module for a venetian blind comprises a shell body 1, a side cover plate 2, a rope winding drum 3, a page turning wheel 4, a transmission rod 5 and a rope guiding mechanism 6. A first slot chamber 11 and a second slot chamber 12 are arranged on one side of the shell body 1, and the first slot chamber 11 and the second slot chamber 12 are arranged side by side along the length direction of the shell body 1; the side cover plate 2 is detachably mounted on the shell body 1 and covers the first slot chamber 11 and the second slot chamber 12. Among them, a quick release component 16 is arranged on the side of the shell body 1, and the number of the quick release components 16 is provided in multiple groups, and all the quick release components 16 are distributed around the shell body component; the side cover plate 2 is provided with a through hole 21, and the through hole 21 penetrates the two opposite sides of the side cover plate 2, and the number of the through holes 21 is equal to the number of the quick release components 16, and each group of quick release components 16 is respectively plugged and limitedly matched with each through hole 21.

[0045] Specific reference Figure 2 The quick-release assembly 16 includes a plurality of limit plates 161, all of which are arranged circumferentially to form a full circle, and the outer diameter of the full circle is smaller than and equal to the inner diameter of the through hole 21; each limit plate 161 is provided with an integrally formed hook portion 162 at one end away from the shell body 1, and the hook portion 162 is located on the side of the limit plate 161 away from the central axis of the full circle.

[0046] Also refer to Figure 1 When the side cover plate 2 needs to be installed on the shell body 1, by passing each limiting plate 161 through the through hole 21, the hook portion 162 can gradually abut against the inner wall of the through hole 21, thereby causing each limiting plate 161 to gather together and deform; after the hook portion 162 passes through the through hole 21, each limiting plate 161 is reset and opened, and the hook portion 162 can abut against the side of the side cover plate 2 away from the shell body 1, thereby realizing rapid assembly between the side cover plate 2 and the shell body 1.

[0047] Reference Figure 3 , Figure 4 The first groove chamber 11 of the shell body 1 is provided with a first support 13 for placing the rope drum 3. The first support 13 is arranged in a semi-circular cone. There are two first supports 13, which are arranged at intervals along the length direction of the shell body 1. The side of the side cover plate 2 is provided with a first clamping seat 22. The shape and number of the first clamping seat 22 are the same as the first support 13. In the assembled state, the two first supports 13 can respectively abut against the two first clamping seats 22, thereby clamping and positioning the two ends of the rope drum 3. It can be understood that the assembled state mentioned here is the state when the side cover plate 2 is fixed to the shell body 1.

[0048] In addition, it should be noted that when the first support 13 and the first clamping seat 22 jointly position the rope drum 3, there is a clearance fit between the rope drum 3 and the first support 13 and the second support 14, so as to facilitate the smooth rotation of the rope drum 3.

[0049] A second support 14 for placing the page turning wheel 4 is provided inside the second slot chamber 12 of the shell body 1. The number of the second support 14 is set to two and is arranged at intervals along the length direction of the shell body 1. A second clamping seat 23 is provided on the side of the side cover plate 2. The number of the second clamping seat 23 is equal to the number of the second support 14. In the assembled state, the two second clamping seats 23 can respectively abut against the two second supports 14, thereby clamping and positioning the page turning wheel 4. Correspondingly, after the page turning wheel 4 is fixed, there is also a clearance fit between the second support 14 and the second clamping seat 23, so as to facilitate the smooth rotation of the page turning wheel 4.

[0050] Reference Figure 5 One end of the transmission rod 5 is fixedly connected to the output shaft of the blind motor, and the other end of the transmission rod 5 is inserted through the rope drum 3 and the page turning wheel 4; in this embodiment, the cross-sectional shape of the transmission rod 5 is a polygon, preferably a regular polygon, and a first plug hole 31 is coaxially opened in the middle of the rope drum 3. The shape and size of the first plug hole 31 are the same as those of the transmission rod 5, so that after the transmission rod 5 is inserted through the first plug hole 31 of the rope drum 3, it can drive the rope drum 3 to rotate together. At the same time, refer to Figure 1 The pull cord 9 for controlling the lifting and lowering of each shutter blade in the venetian blind is wound around the rope drum 3, and the end of the pull cord 9 is fixedly connected to the rope drum 3, so that the rotation of the rope drum 3 can drive the venetian blind to be retracted and extended.

[0051] Reference Figure 1 The rope guide mechanism 6 is arranged inside the first slot chamber 11, and is used to guide the pull rope 9 to be wound around the rope drum 3 in an orderly manner, thereby reducing the possibility of entanglement; the rope guide mechanism 6 includes a threaded rod 61 and a guide seat 62. Back Figure 3 and Figure 4 The first slot chamber 11 of the shell body 1 is provided with a third support 15 for placing the threaded rod 61, and the side of the side cover plate 2 is provided with a third clamping seat 24. The number of the third support 15 and the third clamping seat 24 are both two. In the assembled state, the two third clamping seats 24 can respectively abut against the two third supports 15, thereby clamping and positioning the threaded rod 61. Correspondingly, after the threaded rod 61 is fixed, there is also a clearance fit between the third support 15 and the third clamping seat 24, so as to facilitate the smooth rotation of the threaded rod 61.

[0052] Back to Figure 5 A transmission assembly 7 is provided between the threaded rod 61 and the rope drum 3, which is used to automatically drive the threaded rod 61 to rotate when the rope drum 3 rotates; specifically, the transmission assembly 7 includes a transition gear 71 and two transmission gears 72, and the two transmission gears 72 are respectively fixed to the rope drum 3 and the threaded rod 61; Figure 6 The transition gear 71 is fixedly connected to a rotating shaft rod 711, and a limiting wheel 712 is fixed to the end of the rotating shaft rod 711 away from the transition gear 71. Figure 3 , Figure 4 The shell body 1 and the side cover plate 2 are provided with limiting slots 25 on their opposite sides. In the assembled state, the two limiting slots 25 are arranged opposite to each other, and the limiting wheel 712 can be clamped inside the two limiting slots 25, and the transition gear 71 is meshed with the two transmission gears 72 at the same time to smoothly drive the threaded rod 61 to rotate.

[0053] Back to Figure 5 The guide seat 62 is provided with a thread groove 621, and the threaded rod 61 can match and pass through the thread groove 621, so that the guide seat 62 is threadedly connected to the threaded rod 61; it should be noted that in the assembled state, the shell body 1 and the side cover plate 2 can respectively abut against the two opposite sides of the guide seat 62, thereby limiting the rotation of the guide seat 62, so that the guide seat 62 can only move along the axial direction of the threaded rod 61. At this time, the pull rope 9 is wound around the guide seat 62 and then wound around the rope drum 3. The movement of the guide seat 62 can play a role in organizing the pull rope 9, so that the pull rope 9 is wound around the outer circumference of the rope drum 3 in an orderly manner.

[0054] Reference Figure 7 , a mounting groove 41 is coaxially provided in the middle of the page-turning wheel 4. The cross-sectional shape of the mounting groove 41 is circular, and a sleeve 42 is installed inside the mounting groove 41. The sleeve 42 can rotate freely in the mounting groove 41; a damping layer is bonded to the outer peripheral surface of the sleeve 42 to increase the friction resistance between the sleeve 42 and the page-turning wheel 4. A second plug hole 421 is provided in the middle of the sleeve 42 for the transmission rod 5 to be matched and plugged. The shape and size of the second plug hole 421 are the same as those of the transmission rod 5, so that after the transmission rod 5 is inserted into the second plug hole 421 of the rope drum 3, it can drive the sleeve 42 to rotate together, and the friction force can force the page-turning wheel 4 to rotate together. The flip rope 8 used to control the flipping of each louver in the venetian blind is wound behind the page-turning wheel 4 and partially fixed to the page-turning wheel 4, so that the rotation of the page-turning wheel 4 can drive the venetian blind to flip and change direction.

[0055] An integrally formed limiting component 43 is also provided on the outer side of the page turning wheel 4 to limit the rotation angle of the page turning wheel 4; the limiting component 43 is protrudingly arranged on the outer peripheral surface of the page turning wheel 4. Figure 3 , Figure 4 The shell body 1 is provided with a first abutment portion 17, and the side cover plate 2 is provided with a second abutment portion 26. The first abutment portion 17 and the second abutment portion 26 are both located on the moving path of the limiting component 43. When the transmission rod 5 drives the page-turning wheel 4 to rotate, the limiting component 43 can abut against the first abutment portion 17 or the second abutment portion 26, thereby making the page-turning wheel 4 at the extreme position of rotation, ensuring that the positioning of the blind is maintained after the blind is flipped.

[0056] In addition, back to Figure 3 and Figure 4The outer side surface of the shell body 1 is provided with an integrally formed first matching portion 18, and the outer side surface of the side cover plate 2 is provided with an integrally formed second matching portion 27; the specific shapes of the first matching portion 18 and the second matching portion 27 are as described in the figure. In the assembled state, the first matching portion 18 can be engaged with the second matching portion 27, thereby limiting the lateral movement between the shell body 1 and the side cover plate 2, so as to facilitate the coaxiality between the rope drum 3 and the page turning wheel 4, and ensure that the transmission rod 5 is smoothly passed through the rope drum 3 and the page turning wheel 4.

[0057] The implementation principle of a cord-winding module for a venetian blind in the embodiment of the present application is as follows:

[0058] The shell body 1 and the side cover plate 2 in the present application are combined together to form an integral shell structure. During the specific assembly, the rope winding drum 3, the page turning wheel 4, the threaded rod 61 and the limiting wheel 712 are placed one by one at the corresponding positions of the shell body 1, and then the side cover plate 2 is quickly fixed to the shell body 1 using the quick-release assembly 16. After the side cover plate 2 is covered on the shell body 1, the assembly and fixation of the internal components of the rope winder can be completed at one time, which greatly simplifies the assembly operation of the rope winder and improves the assembly efficiency and production efficiency of the rope winder.

[0059] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cord winding module for a venetian blind, characterized in that: The invention comprises a shell body (1), a side cover plate (2), a rope drum (3) and a page turning wheel (4); a first slot chamber (11) and a second slot chamber (12) are provided on one side of the shell body (1); a first support (13) for placing the rope drum (3) is provided inside the first slot chamber (11); and a second support (14) for placing the page turning wheel (4) is provided inside the second slot chamber (12); The side cover plate (2) is detachably mounted on the shell body (1); a first clamping seat (22) and a second clamping seat (23) are provided on the side surface of the side cover plate (2); in an assembled state, the first support (13) and the first clamping seat (22) jointly clamp the positioning rope reel (3); and the second support (14) and the second clamping seat (23) jointly clamp the positioning page turning wheel (4).

2. The cord winding module for a venetian blind according to claim 1, characterized in that: The side surface of the side cover plate (2) is provided with a through hole (21), and the shell body (1) is provided with a quick-release assembly (16) that cooperates with the through hole (21) to limit the position; wherein the quick-release assembly (16) comprises a plurality of limiting plates (161) arranged in a circumferential direction, and each of the limiting plates (161) is provided with a hook portion (162) at one end away from the shell body (1); when each of the limiting plates (161) passes through the through hole (21), the hook portion (162) abuts against the side surface of the side cover plate (2) away from the shell body (1).

3. The cord winding module for a venetian blind according to claim 2, characterized in that: The number of the quick-release components (16) is provided in a plurality of groups, and each group of the quick-release components (16) is respectively arranged around the shell body (1); the number of the through holes (21) is adapted to the number of the quick-release components (16).

4. The cord winding module for a Venetian blind according to claim 1, characterized in that: It also includes a rope guide mechanism (6), the rope guide mechanism (6) including a threaded rod (61) and a guide seat (62), the guide seat (62) being provided with a threaded groove (621) for the threaded rod (61) to pass through; A third support (15) for placing the threaded rod (61) is provided inside the first groove chamber (11), and a third clamping seat (24) is provided on the side of the side cover plate (2); in the assembled state, the third support (15) and the third clamping seat (24) jointly clamp and position the threaded rod (61), and the side cover plate (2) and the shell body (1) respectively abut against two opposite sides of the guide seat (62); A transmission assembly (7) is provided between the threaded rod (61) and the rope winding drum (3), and is used to automatically drive the threaded rod (61) to rotate when the rope winding drum (3) rotates.

5. The cord winding module for a venetian blind according to claim 4, characterized in that: The transmission assembly (7) comprises a transition gear (71) and two transmission gears (72), wherein the two transmission gears (72) are respectively fixed to the rope drum (3) and the threaded rod (61); The shell body (1) and the side cover plate (2) are respectively provided with limiting slots (25) on opposite sides thereof; the transition gear (71) is fixedly connected to a rotating shaft rod (711); a limiting wheel (712) is fixedly disposed at an end of the rotating shaft rod (711) away from the transition gear (71); in an assembled state, the limiting wheel (712) is clamped inside the two limiting slots (25), and the transition gear (71) is simultaneously meshed with the two transmission gears (72) for transmission.

6. The cord winding module for a Venetian blind according to claim 1, characterized in that: It also comprises a transmission rod (5), the cross-section of the transmission rod (5) being in the shape of a polygon, and the rope drum (3) being coaxially provided with a first plug hole (31) for mating and plugging the transmission rod (5); The page turning wheel (4) is coaxially provided with a mounting groove (41), a freely rotatable sleeve member (42) is installed inside the mounting groove (41), and the sleeve member (42) is provided with a second plug hole (421) for matching and plugging the transmission rod (5); A limiting component (43) for limiting the rotation angle of the page turning wheel (4) is also provided on the outer side of the page turning wheel (4).

7. The cord winding module for a Venetian blind according to claim 6, characterized in that: The limiting component (43) is protrudingly arranged on the outer peripheral surface of the page turning wheel (4), the shell body (1) is provided with a first abutting portion (17), and the side cover plate (2) is provided with a second abutting portion (26); when the limiting component (43) abuts against the first abutting portion (17) or the second abutting portion (26), the limiting component (43) is in an extreme position.

8. The cord winding module for a Venetian blind according to claim 1, characterized in that: The shell body (1) is provided with a first matching portion (18), and the side cover plate (2) is provided with a second matching portion (27); in an assembled state, the first matching portion (18) and the second matching portion (27) are snap-fitted and adapted to limit lateral movement between the shell body (1) and the side cover plate (2).

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