Synchronous belt driven overrunning roller screen

Abstract

This utility model discloses a synchronous belt-driven, stop-and-go retractable screen window, including a left guide rail and a right guide rail. Pulley assemblies are slidably connected to the surfaces of both the left and right guide rails. A synchronous toothed belt is fitted and meshed on the outer surfaces of a first gear, a second gear, and a third gear, and the synchronous toothed belt is fixedly engaged with the lower end of the pulley assembly. A retractable assembly is driven by the rotating ends of the two first gears. A drum is fixedly fitted on the outer surface of the retractable assembly, and a screen is fixedly connected to the outer surface of the drum. A handle is fixedly connected to the end of the screen. By turning the handle, the synchronous toothed belt can be rotated. The rotation of the synchronous toothed belt drives the first, second, and third gears to rotate. The first gear and the retractable assembly drive the drum to rotate. By pulling the end of the screen with the handle, the screen can be retracted and unfolded. The handle can be controlled to stop at any position, providing convenience for the screen window to be unfolded to any size.

Description

Technical Field

[0001] This utility model relates to the field of retractable screen technology, specifically a synchronous belt driven retractable screen. Background Technology

[0002] A roll-up screen is a type of window screen that uses a special structure to automatically roll up the screen, primarily for ventilation and mosquito prevention. Its frame is tightly attached to the window frame. When in use, the screen is pulled down; when not in use, it automatically rolls back into the casing. It saves space and provides a strong seal, making it suitable for high-end home décor. Its working principle is as follows: the screen is stored in a roller. When opening, the handle is pulled to unfold the screen, creating a ventilation channel; when closing, the screen automatically rolls back into the roller due to spring force.

[0003] However, there are still some problems and shortcomings in the use of roll-up screens on the market: when opening, the screen can only be fully opened, and it is not possible to open the screen to any size as needed; moreover, when closing the roll-up screen, the spring pulls the drum to roll it up. At this time, the tension generated by the spring will change from the maximum tension state to the minimum tension state. During this process, the spring drives the handle to move, which can easily hit the hand and cause injury to the user. Therefore, this problem urgently needs to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a synchronous belt-driven, stop-and-go retractable screen window to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a synchronous belt-driven, stop-and-go retractable screen window, comprising a left guide rail and a right guide rail. A left gear box is fixedly installed at the end of the left guide rail, and a left gear box cover is detachably installed on the surface of the left gear box. A right gear box is fixedly installed at the end of the right guide rail, and a right gear box cover is detachably installed on the surface of the right gear box. Pulley assemblies are slidably connected to the surfaces of both the left and right guide rails. A first gear, a second gear, and a third gear are rotatably connected to the inner sides of the left gear box and the left guide rail, and the right gear box and the right guide rail, respectively. A synchronous toothed belt is fitted and meshed on the outer surfaces of the first gear, the second gear, and the third gear, and the synchronous toothed belt is fixedly engaged at the lower end of the pulley assembly. A retractable assembly is driven to the rotating ends of the two first gears. A roll is fixedly fitted on the outer surface of the retractable assembly, and a screen is fixedly connected to the outer surface of the roll. A handle is fixedly connected to the end of the screen, and both ends of the handle are fixedly installed together with the two pulley assemblies through connecting bases.

[0006] Preferably, the pulley assembly includes two limiting pulleys and a pulley seat. The surface of the pulley seat is provided with a through groove, and multiple limiting pulleys are rotatably connected in the through groove. The surfaces of the left guide rail and the right guide rail are provided with limiting wheel grooves, and the limiting pulleys are rotatably installed in the limiting wheel grooves.

[0007] Preferably, both the left and right guide rails have concealed edge grooves on their surfaces, and both sides of the mesh extend into the concealed edge grooves.

[0008] Preferably, the end of the first gear in the left gear box is provided with a slotted groove, and the end of the first gear in the right gear box is provided with a hexagonal slot.

[0009] Preferably, the winding assembly includes a flat head, a hexagonal sleeve, a hexagonal bar, a spring fastener, a spring retaining tail, a preload spring, a snap-fit ​​sleeve, and a hexagonal short rod. The flat head is detachably inserted into the surface of the first gear inside the left gear box. The hexagonal sleeve is fixedly connected to the surface of the flat head. One end of the hexagonal bar is fixedly snapped into the hexagonal sleeve, and the other end of the hexagonal bar is fixedly snapped into the inner wall of the spring fastener. One end of the preload spring is fixedly connected to the surface of the spring fastener, and the other end of the preload spring is fixedly connected to the end of the spring retaining tail. The outer side of the spring retaining tail is snapped into the inner wall of the drum, and the inner side of the spring retaining tail is sleeved on the outer side of the hexagonal bar. The snap-fit ​​sleeve is fixedly snapped into the left end of the drum, and the inner side of the snap-fit ​​sleeve and the outer side of the flat head form a rotatable connection. One end of the hexagonal short rod is snapped into the end of the spring fastener, and the other end of the hexagonal short rod is snapped into the surface of the first gear inside the right gear box.

[0010] Preferably, a shaft core sleeve is fitted on the outer surface of the hexagonal short rod, two first bearings are provided on the inner side of the shaft core sleeve, and the two first bearings are fitted on the outer surface of the hexagonal short rod. A positioning spring is provided between the two first bearings. A clutch cap is integrally formed on the surface of the right gearbox cover, and a clutch plug is integrally formed on the outer surface of the hexagonal short rod, and the clutch plug can engage with the clutch cap.

[0011] Preferably, a second bearing is provided on the inner side of the clutch cap, and the inner side of the second bearing is sleeved on the outer surface of the hexagonal short rod.

[0012] Preferably, the outer surface of the clutch cap has four clearance grooves arranged in a ring array, and the surface of the clutch plug has two pin blocks symmetrically arranged, and the pin blocks can fit into the clearance grooves.

[0013] Beneficial effects

[0014] This utility model provides a synchronous belt-driven, stop-and-go retractable screen window, which has the following advantages:

[0015] 1. This synchronous belt-driven, stop-and-go retractable screen window, by setting up a first gear, a second gear, a third gear, a retractable assembly, a handle, etc., can drive the synchronous gear belt to rotate by pulling the handle. The rotation of the synchronous gear belt can drive the first gear, the second gear, and the third gear to rotate. The first gear and the retractable assembly are connected to drive the drum to rotate. With the handle pulling the end of the screen, the screen can be retracted and unfolded. The handle can be controlled to stop at any position, providing convenience for the screen window to be unfolded to any size.

[0016] 2. This synchronous belt-driven, stop-and-go retractable screen window uses a synchronous toothed belt to drive the drum to rotate, replacing the existing technology that uses a spring to drive the drum to rotate. The handle can be stopped at any position, thus effectively avoiding the problem that when closing the retractable screen window, the spring pulls the drum to retract, and the tension generated by the spring can easily cause the handle to hit the hand.

[0017] 3. This synchronous belt-driven, stop-and-go rewind screen utilizes a pre-tensioning spring to apply torque to the spring-fastening tail, which allows the drum, secured to the outside of the spring-fastening tail, to rotate adaptively. This ensures the screen remains taut, effectively preventing slack during unwinding and guaranteeing the screen's isolation effect.

[0018] 4. This synchronous belt-driven, stop-and-go rewind screen, when disassembling and cleaning the screen and reinstalling the roll, to prevent the preload spring torque from disappearing, is designed with a shaft sleeve, first bearing, positioning spring, clutch cap, and clutch plug. The clutch cap's clearance groove and the clutch plug's pin engage with each other to fix the hexagonal short rod, preventing it from rotating on its own. Fixing the hexagonal short rod also fixes the spring tensioner, making it easier to rotate the preload spring to apply appropriate torque, thus facilitating the screen disassembly and reinstallation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a synchronous belt-driven, stop-and-go retractable screen window proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of a synchronous belt driven, stop-and-go retractable screen window after the roller is completely removed, as proposed in this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the left guide rail of a synchronous belt driven stop-and-go retractable screen window proposed in this utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of a pulley assembly for a synchronous belt-driven, stop-and-go retractable screen window proposed in this utility model.

[0023] Figure 5 This is an exploded view of the winding assembly of a synchronous belt-driven, stop-and-go wind-up screen window proposed in this utility model.

[0024] Figure 6 This is a schematic diagram of the hexagonal sleeve three-dimensional structure of a synchronous belt driven stop-and-go retractable screen window proposed in this utility model;

[0025] Figure 7 A cross-sectional view of a hexagonal short rod structure for a synchronous belt-driven, stop-and-go retractable screen window proposed in this utility model.

[0026] Figure 8 This is a three-dimensional structural diagram of the right gear box of a synchronous belt driven stop-and-go wind-up screen window proposed in this utility model.

[0027] Figure 9 This is a three-dimensional structural diagram of the clutch cap and clutch plug of a synchronous belt driven stop-and-go retractable screen window proposed in this utility model.

[0028] In the diagram: 1. Left guide rail; 2. Right guide rail; 3. Left gearbox; 4. Left gearbox cover; 5. Right gearbox; 6. Right gearbox cover; 7. Pulley assembly; 8. First gear; 9. Second gear; 10. Third gear; 11. Synchronous toothed belt; 12. Rewinding assembly; 13. Drum; 14. Mesh; 15. Handle; 16. Limiting pulley; 17. Pulley seat; 18. Limiting wheel groove; 19. Concealed edge groove; 20. Slotted head; 21. Hexagonal sleeve; 22. Hexagonal bar; 23. Spring fastener; 24. Spring fastening tail; 25. Preload spring; 26. Snap-fit ​​sleeve; 27. Hexagonal short rod; 28. Shaft core sleeve; 29. ​​First bearing; 30. Positioning spring; 31. Clutch cap; 32. Clutch plug; 33. Second bearing; 34. Clearance groove; 35. Pin block. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1, please refer to Figure 1-9This utility model provides a technical solution: a synchronous belt driven stop-and-go retractable screen window, including a left guide rail 1 and a right guide rail 2. A left gear box 3 is fixedly installed at the end of the left guide rail 1, and a left gear box cover 4 is detachably installed on the surface of the left gear box 3. A right gear box 5 is fixedly installed at the end of the right guide rail 2, and a right gear box cover 6 is detachably installed on the surface of the right gear box 5. Pulley assemblies 7 are slidably connected to the surfaces of both the left guide rail 1 and the right guide rail 2. A first gear 8, a second gear 9, and a third gear 10 are rotatably connected to the inner sides of the left gear box 3 and the left guide rail 1, and the right gear box 5 and the right guide rail 2, respectively. A synchronous toothed belt 11 is fitted and meshed on the outer surfaces of the first gear 8, the second gear 9, and the third gear 10. The surface of the synchronous toothed belt 11 is provided with teeth (not shown in the figure), and the synchronous toothed belt 11 is fixedly engaged with the lower end of the pulley assembly 7. The rotation of the two first gears 8... The rotating end is connected to a winding assembly 12. A drum 13 is fixedly sleeved on the outer surface of the winding assembly 12. A screen 14 is fixedly connected to the outer surface of the drum 13. A handle 15 is fixedly connected to the end of the screen 14. The two ends of the handle 15 are fixedly installed together with two pulley assemblies 7 through connecting bases. By setting up a first gear 8, a second gear 9, a third gear 10, the winding assembly 12, and the handle 15, the handle 15 can be turned to drive the synchronous toothed belt 11 to rotate. The rotation of the synchronous toothed belt 11 can drive the first gear 8, the second gear 9, and the third gear 10 to rotate. The first gear 8 and the winding assembly 12 are connected to drive the drum 13 to rotate. With the handle 15 pulling the end of the screen 14, the screen 14 can be wound up and unfolded. The handle 15 can be controlled to stop at any position, providing convenience for the screen to be unfolded to any size.

[0031] The synchronous toothed belt 11 drives the drum 13 to rotate, replacing the existing technology that uses a spring to drive the drum 13 to rotate. The handle 15 can be paused at any position, thus effectively avoiding the problem that when closing and rewinding the screen window, the spring pulls the drum 13 to rewind, and the tension generated by the spring can easily cause the handle 15 to hit the hand.

[0032] The pulley assembly 7 includes two limiting pulleys 16 and a pulley seat 17. The surface of the pulley seat 17 is provided with a through groove, and multiple limiting pulleys 16 are rotatably connected in the through groove. The surfaces of the left guide rail 1 and the right guide rail 2 are provided with limiting wheel grooves 18. The limiting pulleys 16 are rotatably installed in the limiting wheel grooves 18. By setting the limiting pulleys 16, the pulley seat 17 and the limiting wheel grooves 18, the movement of the pulley seat 17 can be facilitated by the rolling of the limiting pulleys 16 in the limiting wheel grooves 18, thereby facilitating the movement of the handle 15.

[0033] Both the left guide rail 1 and the right guide rail 2 have concealed edge grooves 19 on their surfaces. Both sides of the mesh 14 extend into the concealed edge grooves 19. By setting the concealed edge grooves 19, the two sides of the mesh 14 can be limited, effectively preventing mosquitoes from passing through the two sides of the mesh 14.

[0034] The first gear 8 in the left gear box 3 has a slotted end, and the first gear 8 in the right gear box 5 has a hexagonal slot. The winding assembly 12 includes a slotted head 20, a hexagonal sleeve 21, a hexagonal bar 22, a spring tensioner 23, a spring fastening tail 24, a preload spring 25, a snap-fit ​​sleeve 26, and a hexagonal short rod 27. The slotted head 20 is detachably inserted into the surface of the first gear 8 in the left gear box 3. The hexagonal sleeve 21 is fixedly connected to the surface of the slotted head 20. One end of the hexagonal bar 22 is fixedly snapped into the hexagonal sleeve 21, and the other end of the hexagonal bar 22 is fixedly snapped into the inner wall of the spring tensioner 23. One end of the preload spring 25 is fixedly connected to the spring tensioner 23. On the surface, the other end of the preload spring 25 is fixedly connected to the end of the spring fastening tail 24, and the outer side of the spring fastening tail 24 is snapped into the inner wall of the drum 13. The inner side of the spring fastening tail 24 is sleeved on the outer side of the hexagonal bar 22. The snap-fit ​​sleeve 26 is fixedly snapped into the left end of the drum 13. The inner side of the snap-fit ​​sleeve 26 and the outer side of the I-head 20 form a rotatable connection. One end of the hexagonal short rod 27 is snapped into the end of the spring fastener 23, and the other end of the hexagonal short rod 27 is snapped into the surface of the first gear 8 in the right gear box 5. By setting the snap-fit ​​sleeve 26, the end of the drum 13 can be limited, effectively preventing the end of the drum 13 from rubbing against the left gear box cover 4.

[0035] Since the diameter of the mesh 14 roll changes when the drum 13 winds up the mesh 14, in order to prevent the mesh 14 from becoming loose, the winding assembly 12 is set up. The pre-tensioning spring 25 applies pressure torque to the spring fastening tail 24, which can make the drum 13, which is locked to the outside of the spring fastening tail 24, rotate adaptively, so that the screen can be tightened. This effectively prevents the mesh 14 from becoming loose during the unfolding process and ensures the isolation effect of the mesh 14.

[0036] Example 2 includes Example 1, and based on Example 1, this utility model provides a technical solution: a shaft core sleeve 28 is sleeved on the outer surface of the hexagonal short rod 27, two first bearings 29 are provided on the inner side of the shaft core sleeve 28, and the two first bearings 29 are sleeved on the outer surface of the hexagonal short rod 27. A positioning spring 30 is provided between the two first bearings 29. A clutch cap 31 is integrally formed on the surface of the right gearbox cover 6, and a clutch plug 32 is integrally formed on the outer surface of the hexagonal short rod 27, and the clutch plug 32 can engage with the clutch cap 31.

[0037] A second bearing 33 is provided on the inner side of the clutch cap 31. The inner side of the second bearing 33 is sleeved on the outer surface of the hexagonal short rod 27. By providing the second bearing 33, the friction between the clutch cap 31 and the hexagonal short rod 27 can be effectively reduced.

[0038] The outer surface of the clutch cap 31 has four clearance grooves 34 arranged in a ring array. The surface of the clutch plug 32 has two pin blocks 35 symmetrically arranged, and the pin blocks 35 can fit into the clearance grooves 34.

[0039] After a period of use, the mesh 14 needs to be cleaned. When disassembling and cleaning the mesh 14 and reinstalling the roll 13, in order to prevent the torque of the preload spring 25 from disappearing, the shaft sleeve 28, the first bearing 29, the positioning spring 30, the clutch cap 31 and the clutch plug 32 are set up. The clutch cap 31 and the clearance groove 34 and the pin block 35 of the clutch plug 32 are engaged with each other to fix the hexagonal short rod 27, preventing the hexagonal short rod 27 from rotating on its own. By fixing the hexagonal short rod 27, the spring tensioner 23 can be fixed, which makes it easy to rotate the preload spring 25 to charge it with appropriate torque, thus facilitating the disassembly and reassembly of the mesh 14.

[0040] When the right gear box 5 and the right gearbox cover 6 are installed together, the clearance groove 34 of the clutch cap 31 will separate from the pin block 35 of the clutch plug 32. At this time, the clutch cap 31 will not affect the free rotation of the clutch plug 32, thus ensuring the normal operation of the drum 13.

[0041] Working principle: When the synchronous belt-driven roll-up screen is in use, pulling the handle 15 applies tension to one end of the screen 14. As the handle 15 moves, the pulley assembly 7 moves accordingly. The pulley assembly 7 drives the synchronous toothed belt 11 to rotate, which in turn causes the first gear 8, the second gear 9, and the third gear 10 to rotate synchronously. The rotation of the first gear 8 drives the flat head 20 and the hexagonal short rod 27 to rotate synchronously. The rotation of the flat head 20 drives the hexagonal sleeve 21 to rotate, which in turn drives the hexagonal rod 22 to rotate. At the same time, the rotation of the hexagonal short rod 27 drives the spring tensioner 23 to rotate, which in turn drives the pre-tension spring 25 and the spring fastening tail 24 to rotate. The rotation of the spring fastening tail 24, in conjunction with the pre-tension spring 25, applies torque to the spring fastening tail 24, which in turn drives the drum 13 to rotate, thus realizing the rolling and unrolling of the screen 14. The handle 15 can be stopped at any position, providing convenience for the screen to be rolled up to any size.

[0042] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0043] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A synchronous belt driven overstop rolling screen, comprising a left guide rail (1) and a right guide rail (2), characterized in that: A left gear box (3) is fixedly installed at the end of the left guide rail (1), and a left gear box cover (4) is detachably installed on the surface of the left gear box (3). A right gear box (5) is fixedly installed at the end of the right guide rail (2), and a right gear box cover (6) is detachably installed on the surface of the right gear box (5). Pulley assemblies (7) are slidably connected to the surfaces of the left guide rail (1) and the right guide rail (2). A first gear (8), a second gear (9), and a third gear (10) are rotatably connected to the inner sides of the left gear box (3) and the left guide rail (1), as well as the right gear box (5) and the right guide rail (2). The outer surfaces of the gears (8), the second gear (9) and the third gear (10) are fitted with a synchronous toothed belt (11), and the synchronous toothed belt (11) is fixedly snapped onto the lower end of the pulley assembly (7). The rotating ends of the two first gears (8) are connected to a winding assembly (12). The outer surface of the winding assembly (12) is fixedly fitted with a drum (13). The outer surface of the drum (13) is fixedly connected with a mesh (14). The end of the mesh (14) is fixedly connected with a handle (15). The two ends of the handle (15) are fixedly installed together with the two pulley assemblies (7) through a connecting base.

2. A synchronized belt drive stay-open roller screen according to claim 1, wherein: The pulley assembly (7) includes two limiting pulleys (16) and a pulley seat (17). The surface of the pulley seat (17) is provided with a through groove, and multiple limiting pulleys (16) are rotatably connected in the through groove. The surfaces of the left guide rail (1) and the right guide rail (2) are provided with limiting wheel grooves (18), and the limiting pulleys (16) are rolled in the limiting wheel grooves (18).

3. A synchronized belt drive stay-open roller screen according to claim 1, wherein: The surfaces of the left guide rail (1) and the right guide rail (2) are provided with hidden edge grooves (19), and both sides of the mesh (14) extend into the hidden edge grooves (19).

4. A synchronized belt drive stay-open roller screen according to claim 1, wherein: The end of the first gear (8) in the left gear box (3) is provided with a slot, and the end of the first gear (8) in the right gear box (5) is provided with a hexagonal slot.

5. A synchronous belt-driven, stop-and-go retractable screen window according to claim 4, characterized in that: The winding assembly (12) includes a flat head (20), a hexagonal sleeve (21), a hexagonal bar (22), a spring fastener (23), a spring fastening tail (24), a preload spring (25), a snap-fit ​​sleeve (26), and a hexagonal short rod (27). The flat head (20) is detachably inserted into the surface of the first gear (8) inside the left gear box (3). The hexagonal sleeve (21) is fixedly connected to the surface of the flat head (20). One end of the hexagonal bar (22) is fixedly snapped into the hexagonal sleeve (21), and the other end of the hexagonal bar (22) is fixedly snapped into the inner wall of the spring fastener (23). One end of the preload spring (25) is fixedly connected to... The surface of the spring fastener (23) has the other end of the pre-tension spring (25) fixedly connected to the end of the spring fastening tail (24), and the outer side of the spring fastening tail (24) is snapped into the inner wall of the drum (13). The inner side of the spring fastening tail (24) is sleeved on the outer side of the hexagonal bar (22). The snap-fit ​​sleeve (26) is fixedly snapped into the left end of the drum (13). The inner side of the snap-fit ​​sleeve (26) and the outer side of the slit head (20) form a rotating connection. One end of the hexagonal short rod (27) is snapped into the end of the spring fastener (23), and the other end of the hexagonal short rod (27) is snapped into the surface of the first gear (8) in the right gear box (5).

6. A synchronous belt-driven, stop-and-go retractable screen window according to claim 5, characterized in that: The outer surface of the hexagonal short rod (27) is fitted with a shaft core sleeve (28). The inner side of the shaft core sleeve (28) is provided with two first bearings (29), and the two first bearings (29) are fitted on the outer surface of the hexagonal short rod (27). A positioning spring (30) is provided between the two first bearings (29). The surface of the right gearbox cover (6) is integrally formed with a clutch cap (31). The outer surface of the hexagonal short rod (27) is integrally formed with a clutch plug (32), and the clutch plug (32) can engage with the clutch cap (31).

7. A synchronous belt-driven, stop-and-go retractable screen window according to claim 6, characterized in that: The clutch cap (31) is provided with a second bearing (33) on its inner side, and the inner side of the second bearing (33) is sleeved on the outer surface of the hexagonal short rod (27).

8. A synchronous belt-driven, stop-and-go retractable screen window according to claim 6, characterized in that: The outer surface of the clutch cap (31) is provided with four relief grooves (34) in a ring array. The surface of the clutch plug (32) is symmetrically provided with two pin blocks (35), and the pin blocks (35) can fit into the relief grooves (34).

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