A spring roller blind

Abstract

The utility model relates to a roller shutter technical field especially a spring roller, including position limiting axle axle core, lock axle axle core and aluminium pipe, the position limiting axle axle core surface is equipped with the position limiting axle sleeve, the position limiting axle axle core's surface threadedly equipped with the nut, the position limiting axle axle core's surface is equipped with the position limiting axle end cover, the position limiting axle axle core one side is equipped with the support twist core, the support twist core one side is connected with the support and penetrates, the support surface is equipped with the adjusting wheel, the adjusting wheel surface is equipped with the support sleeve. The utility model through increase the effective number of turns of spring, reduce the force difference in the process of taking out and putting, replace the damper, make the spring also can use normally under low temperature, improved the applicability of spring roller, avoided the dependence damper and damping liquid to realize the curtain stable taking out and putting, therefore, when using in the place of lower temperature, still can guarantee the curtain normal up collection, improved the environmental adaptability and reliability of product.

Description

Technical Field

[0001] This utility model relates to the field of roller blind technology, specifically a spring roller blind. Background Technology

[0002] With social development and progress, curtain products are constantly being updated. Curtains with beaded or pull cord operation pose safety hazards to children due to the pull cord or beaded operation. Therefore, cordless curtains have gradually become the main products that customers can demand and choose. However, due to the higher cost of motorized curtains, cordless spring curtains better meet market demand.

[0003] Currently, self-locking spring roller blinds produced and sold on the market all use a damper at the top of the spring rod to offset the spring force difference, so that the blinds can be raised and lowered smoothly. However, when used in low-temperature environments, the damping fluid in the damper is prone to failure, which can cause the blinds to fail to be raised and lowered properly, affecting the user experience and product reliability. In order to solve the above technical problems, it is necessary to design a spring roller blind to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a spring roller blind that reduces the force difference during the opening and closing process by increasing the effective number of spring coils, replacing the damper and enabling the spring to function normally at low temperatures. This solves the problem that the damping fluid in the damper of existing self-locking spring roller blinds is prone to failure when used in low-temperature environments, which leads to the curtain not being able to be opened and closed normally, affecting the user experience and product reliability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a spring roller blind, comprising a limiting shaft core, a locking shaft core, and an aluminum tube. A limiting shaft sleeve is fitted onto the surface of the limiting shaft core, a nut is threaded onto the surface of the limiting shaft core, a limiting shaft end cap is fitted onto the surface of the limiting shaft core, a bracket torsion core is fitted onto one side of the limiting shaft core, a bracket is connected through one side of the bracket torsion core, an adjusting wheel is fitted onto the surface of the bracket, a bracket sleeve is fitted onto the surface of the adjusting wheel, a bidirectional torsion spring is fitted onto the surface of the bracket, a pan head screw is connected through the left side of the bracket, a locking shaft sleeve is fitted onto the surface of the locking shaft core, and a locking shaft lock core is fitted onto the surface of the locking shaft core.

[0006] Preferably, a steel ball is provided in the groove on the surface of the lock shaft cylinder, a lock shaft spring is connected to the surface of the lock shaft cylinder by screws, a lock shaft end cap is fastened to the right side of the lock shaft sleeve, a composite spring head, an inner spring and a composite spring tail are respectively sleeved on the surface of the aluminum tube, a composite spring shaft is sleeved on the surface of the composite spring head, an outer spring is sleeved on the outside of the inner spring, and a rotating wheel inner core is connected to both sides of the aluminum tube by screws, and a rotating wheel is sleeved on the surface of the rotating wheel inner core.

[0007] Preferably, one side of the limiting shaft end cap extends into the inner cavity of the limiting shaft sleeve, and a retaining spring is snapped onto the surface of the limiting shaft core.

[0008] Preferably, a screw is connected through the surface of the bracket torsion core, and one end of the screw passes through the bracket torsion core and is threadedly connected to the limiting shaft core.

[0009] Preferably, the opening of the bidirectional torsion spring faces the side of the adjusting wheel fan-shaped boss, and the fan-shaped boss of the bracket torsion core is inserted into the other side of the bidirectional torsion spring opening.

[0010] Preferably, one side of the inner spring is fitted into the threaded groove of the composite spring tail, and the other side of the inner spring is fitted into the threaded groove of the composite spring head.

[0011] Preferably, one side of the outer spring is fitted into the threaded groove of the composite spring tail, and the other side of the outer spring is fitted into the threaded groove of the composite spring shaft.

[0012] Preferably, bearings are fitted on both sides of the inner surface of the rotating wheel core, and the bearings are located in the inner cavity of the rotating wheel core.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model increases the effective number of spring coils, reduces the force difference during the opening and closing process, and replaces the damper, so that the spring can be used normally at low temperatures, thus improving the applicability of the spring roller blind.

[0015] 2. This utility model's spring roller blind features a cordless design, fundamentally eliminating the safety hazards to children caused by traditional corded curtains. It provides a safer environment for families, especially those with children, effectively reducing the risk of accidents. Compared to motorized curtains, cordless spring roller blinds are less expensive, making them more price-competitive in the market and meeting the needs of more consumers for affordable curtains. This facilitates the widespread promotion and application of the product. It avoids relying on dampers and damping fluids to achieve smooth opening and closing of the curtains, ensuring normal operation even in low-temperature environments, thus improving the product's environmental adaptability and reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the assembly of the limiting shaft sleeve and the limiting shaft core of this utility model;

[0019] Figure 4 This is a schematic diagram of the assembly of the bracket torsion core and the bracket sleeve of this utility model;

[0020] Figure 5 This is a schematic diagram of the assembly of the locking shaft and locking sleeve of this utility model;

[0021] Figure 6 This is a schematic diagram of the assembly of the rotating wheel and the inner core of the rotating wheel according to this utility model.

[0022] In the diagram: 1. Snap ring; 2. Limiting shaft end cap; 3. Nut; 4. Limiting shaft sleeve; 5. Limiting shaft core; 6. Locking shaft core; 7. Pan head screw; 8. Bracket torsion core; 9. Bracket sleeve; 10. Double-acting torsion spring; 11. Adjusting wheel; 12. Bracket; 13. Locking shaft core; 14. Locking shaft sleeve; 15. Aluminum tube; 16. Locking shaft spring; 17. Composite spring shaft; 18. Composite spring head; 19. Composite spring tail; 20. Outer spring; 21. Rotating wheel; 22. Rotating wheel inner core; 23. Bearing; 24. Inner spring; 25. Locking shaft end cap; 26. Steel ball. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0024] Example 1: As Figures 1-6 A spring roller blind includes a limiting shaft core 5, a locking shaft core 13, and an aluminum tube 15. A limiting shaft sleeve 4 is fitted on the surface of the limiting shaft core 5, a nut 3 is threaded onto the surface of the limiting shaft core 5, a limiting shaft end cap 2 is fitted onto the surface of the limiting shaft core 5, a bracket torsion core 8 is fitted on one side of the limiting shaft core 5, a bracket 12 is connected through one side of the bracket torsion core 8, an adjusting wheel 11 is fitted on the surface of the bracket 12, a bracket sleeve 9 is fitted on the surface of the adjusting wheel 11, a bidirectional torsion spring 10 is fitted on the surface of the bracket 12, a pan head screw 7 is connected through the left side of the bracket 12, a locking shaft sleeve 14 is fitted on the surface of the locking shaft core 13, and a locking shaft lock core 6 is fitted onto the surface of the locking shaft core 13. The spring roller blind is a cordless design, which fundamentally eliminates the safety hazards to children caused by traditional corded curtains due to cords or beads, providing a safer environment for family use, especially suitable for families with children, effectively reducing the risk of accidents. Compared with electric curtain products, cordless spring roller blinds are less expensive.

[0025] like Figure 1A steel ball 26 is set in the groove on the surface of the locking cylinder 6. The locking cylinder 6 is connected to the locking spring 16 by an M1.6X5 screw. The right side of the locking cylinder sleeve 14 is fastened with a locking cylinder end cap 25. The surface of the aluminum tube 15 is respectively fitted with a composite spring head 18, an inner spring 24, and a composite spring tail 19. The surface of the composite spring head 18 is fitted with a composite spring shaft 17. The outer spring 20 is fitted outside the inner spring 24. Both sides of the aluminum tube 15 are connected to the inner core of the wheel 22 by screws. The surface of the inner core of the wheel 22 is fitted with a wheel 21. By increasing the effective number of spring coils, the force difference during the opening and closing process is reduced, replacing the damper, so that the spring can be used normally at low temperatures. This improves the applicability of the spring roller blind and avoids the reliance on dampers and damping fluid to achieve smooth opening and closing of the curtain. When used in low-temperature areas, it can still ensure that the curtain can be opened and closed normally, improving the environmental adaptability and reliability of the product and providing a safer environment for home use.

[0026] like Figures 1-3 One side of the limiting shaft end cover 2 extends into the inner cavity of the limiting shaft sleeve 4. The surface of the limiting shaft core 5 is fitted with a retaining spring 1. By setting the limiting shaft end cover 2, the limiting shaft sleeve 4 can be sealed to prevent external dust from entering and extend the service life of the spring roller shutter. By setting the retaining spring 1, the limiting shaft end cover 2 can be limited, which improves the stability of the limiting shaft end cover 2.

[0027] like Figure 2 A screw is connected through the surface of the bracket torsion core 8. One end of the screw passes through the bracket torsion core 8 and is threadedly connected to the limit shaft core 5. By setting the screw, the bracket torsion core 8 and the limit shaft core 5 are connected, and the connection is stable.

[0028] like Figure 4 The opening of the bidirectional torsion spring 10 faces the fan-shaped protrusion of the adjusting wheel 11. The fan-shaped protrusion of the bracket torsion core 8 is inserted into the other side of the opening of the bidirectional torsion spring 10. The adjusting wheel 11 is then fitted onto the inner rod of the bracket 12, followed by the bidirectional torsion spring 10, with its opening facing the fan-shaped protrusion of the adjusting wheel 11. The bracket sleeve 9 and bracket torsion core 8 are then sequentially installed, with the fan-shaped protrusion of the bracket torsion core 8 inserted into the other side of the opening of the bidirectional torsion spring 10. The two uprights of the bidirectional torsion spring 10 are positioned at the fan-shaped protrusion of the adjusting wheel 11 and the bracket torsion core 8, respectively. The fan-shaped boss of the bracket torsion core 8 is located in the middle. After installation, it is fixed to the inner rod of the bracket 12 with pan head screws 7. The bracket sleeve 9 can rotate flexibly clockwise and counterclockwise. When fine-tuning, the adjusting wheel 11 is rotated. The fan-shaped boss of the adjusting wheel 11 pushes the bidirectional torsion spring 10, which drives the fan-shaped boss of the bracket torsion core 8 to rotate in the inner rod of the bracket 12. The bracket torsion core 8 is forced to push the bidirectional torsion spring 10. The bidirectional torsion spring 10 and the inner rod of the bracket 12 are locked and cannot be rotated. When fine-tuning, the adjusting wheel 11 can be rotated. The required state can be achieved through the transmission of the torsion core without unloading the force.

[0029] like Figures 1-2 One side of the inner spring 24 is fitted into the threaded groove of the composite spring tail 19, and the other side of the inner spring 24 is fitted into the threaded groove of the composite spring head 18.

[0030] like Figures 1-2 One side of the outer spring 20 is fitted into the threaded groove of the composite spring tail 19, and the other side of the outer spring 20 is fitted into the threaded groove of the composite spring shaft 17. The outer spring 20 and the inner spring 24 have opposite spring twist directions but the same torque. Through the transmission connection of the composite spring tail 19, the spring achieves twice the spring effect with half the length of space, which indirectly lengthens the spring and increases the effective number of spring coils, thereby reducing the force difference during the opening and closing of the curtain and making it open and close smoothly.

[0031] like Figure 6 Bearings 23 are fitted on both sides of the inner surface of the inner core 22 of the rotating wheel. The bearings 23 are located in the inner cavity of the inner core 22 of the rotating wheel. The bearings 23 are respectively installed into the grooves at both ends of the rotating wheel 21, and the inner core 22 of the rotating wheel is installed into the bearings 23. Through the cooperation between the rotating wheel 21 and its limiting aluminum tube 15, the spring rod is prevented from swinging back and forth in the limiting aluminum tube 15 and hitting the tube wall, thus creating unnecessary noise. The bearings 23 enable the rotating wheel 21 to rotate normally and smoothly, avoiding the curtain from getting stuck.

[0032] In use, install the limiting shaft sleeve 4 onto the limiting shaft core 5, screw the two nuts 3 into the limiting sleeve, attach the limiting shaft end cap 2, and insert the retaining spring 1 into the annular groove at the top of the limiting shaft core 5. The limiting is achieved by the movement of the two nuts 3 within the limiting shaft sleeve 4. When the limiting shaft sleeve 4 rotates, it drives the nuts 3 to rotate, causing them to move up and down within the sleeve. When the nuts 3 move to both ends, the limiting shaft sleeve 4 cannot rotate in one direction, thus limiting the curtain. Install the locking shaft sleeve 14 into the locking shaft core 13, fix the locking shaft spring 16 to the locking shaft lock cylinder 6 with an M1.6X5 screw, insert the 3mm steel ball 26 into the groove on the surface of the locking shaft lock cylinder 6, and install the locking shaft lock cylinder 6 assembly into the locking shaft sleeve 1. 4. The 3mm steel ball 26 is inserted into the semi-circular slide of the locking shaft sleeve 14. The locking shaft end cap 25 is then fastened into the locking shaft sleeve 14. When the curtain is rotated, it will drive the locking shaft sleeve 14 to rotate. The 3mm steel ball 26 in the semi-circular slide of the locking shaft sleeve 14 will roll in the groove of the locking shaft core 6. When the curtain is pulled down to the end and released, the sleeve rotates in the opposite direction, and the steel ball 26 rolls into the slot of the locking shaft core 6, driving the locking shaft core 6 to rotate. The locking shaft core 6 drives the locking shaft spring 16 to rotate through the screw. The locking shaft spring 16 rotates and locks the locking shaft core 13. This transmission achieves the effect of preventing the curtain from springing back. When the curtain is pulled down a short distance and then released, the 3mm steel ball 26 will disengage from the slot of the locking shaft core 6 and roll in the groove of the locking shaft core 6. The curtain is then released from its limit and retracts normally.

[0033] In summary, this spring roller blind, through its bidirectional torsion spring 10, locking shaft sleeve 14, locking shaft lock core 6, steel ball 26, locking shaft spring 16, composite spring head 18, inner spring 24, composite spring tail 19, composite spring pivot 17, and outer spring 20, solves the problem that existing self-locking spring roller blinds are prone to damping fluid failure in low-temperature environments, which leads to the curtains failing to retract properly, affecting user experience and product reliability.

Claims

1. A spring roller blind, comprising a limiting shaft core (5), a locking shaft core (13), and an aluminum tube (15), characterized in that: The surface of the limiting shaft core (5) is fitted with a limiting shaft sleeve (4), the surface of the limiting shaft core (5) is threaded with a nut (3), the surface of the limiting shaft core (5) is fitted with a limiting shaft end cap (2), one side of the limiting shaft core (5) is fitted with a bracket torsion core (8), one side of the bracket torsion core (8) is connected to a bracket (12), the surface of the bracket (12) is fitted with an adjusting wheel (11), the surface of the adjusting wheel (11) is fitted with a bracket sleeve (9), the surface of the bracket (12) is fitted with a bidirectional torsion spring (10), the left side of the bracket (12) is connected to a pan head screw (7), the surface of the locking shaft core (13) is fitted with a locking shaft sleeve (14), and the surface of the locking shaft core (13) is fitted with a locking shaft lock core (6).

2. A spring roller blind according to claim 1, characterized in that: A steel ball (26) is provided in the groove on the surface of the lock shaft core (6). A lock shaft spring (16) is connected to the surface of the lock shaft core (6) by screws. A lock shaft end cap (25) is fastened to the right side of the lock shaft sleeve (14). A composite spring head (18), an inner spring (24) and a composite spring tail (19) are respectively fitted on the surface of the aluminum tube (15). A composite spring shaft (17) is fitted on the surface of the composite spring head (18). An outer spring (20) is fitted on the outside of the inner spring (24). A rotating wheel inner core (22) is connected to both sides of the aluminum tube (15) by screws. A rotating wheel (21) is fitted on the surface of the rotating wheel inner core (22).

3. A spring roller blind according to claim 1, characterized in that: One side of the limiting shaft end cap (2) extends into the inner cavity of the limiting shaft sleeve (4), and a retaining spring (1) is snapped onto the surface of the limiting shaft core (5).

4. A spring roller blind according to claim 1, characterized in that: A screw is connected through the surface of the bracket torsion core (8), and one end of the screw passes through the bracket torsion core (8) and is threadedly connected to the limiting shaft core (5).

5. A spring roller blind according to claim 1, characterized in that: The opening direction of the bidirectional torsion spring (10) faces the side of the fan-shaped boss of the adjusting wheel (11), and the fan-shaped boss of the bracket torsion core (8) is inserted into the other side of the opening direction of the bidirectional torsion spring (10).

6. A spring roller blind according to claim 2, characterized in that: One side of the inner spring (24) is fitted into the threaded groove of the composite spring tail (19), and the other side of the inner spring (24) is fitted into the threaded groove of the composite spring head (18).

7. A spring roller blind according to claim 2, characterized in that: One side of the outer spring (20) is fitted into the threaded groove of the composite spring tail (19), and the other side of the outer spring (20) is fitted into the threaded groove of the composite spring shaft (17).

8. A spring roller blind according to claim 2, characterized in that: Bearings (23) are fitted on both sides of the surface of the inner core (22) of the wheel, and the bearings (23) are located in the inner cavity of the inner core (22).

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