Rope winder for curtain

Abstract

The rope winder for the curtain comprises a base and a shaft body for an external curtain pull rope to wind, the base is provided with a rope winding cavity for the shaft body to be rotatably connected, the bottom wall of the base is provided with two open holes for the external pull rope to partially penetrate into or out of the rope winding cavity, and the two open holes are formed in the two ends of the base respectively. The bottom wall of the base is provided with a guiding structure used for guiding the moving direction of the pull rope when the external pull rope is locally placed in or penetrates out, and an adjusting structure used for being in linkage fit with the guiding structure and applying pre-tightening force to the pull rope so as to adjust the tension of the pull rope. According to the rope winder, the problem that the winding path or the unfolding path of a pull rope is affected due to the fact that the pull rope is loaded by external acting force and shakes or shifts when the pull rope of a curtain penetrates out or penetrates in through a traditional rope winder is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of curtain cord reel devices, specifically a curtain cord reel device. Background Technology

[0002] In curtain raising and lowering control systems, the cord reel is the core component for retracting and releasing the curtain cord. Traditional curtain cord reels typically consist of a base and a shaft. The shaft winds the curtain cord, and the base has a cord reel cavity for the shaft to rotate. The cord passes through the opening in the base into or out of the cord reel cavity to raise and lower the curtain. However, existing cord reels have significant drawbacks in practical use: when the cord partially enters or exits the cord reel cavity, it is easily affected by external forces (such as the inertial force during curtain raising and lowering, the friction between the cord and the pulley system, and fluctuations in the user's pulling force), causing the cord to sway or shift. This swaying or shifting directly affects the cord's winding or unfolding path, leading to a series of problems: firstly, the cord may become unevenly wound, multi-layered, or even knotted during winding, reducing the cord reel's efficiency and lifespan; secondly, if the cord deviates from its path during unfolding, the curtain may not rise and fall smoothly, resulting in jamming, tilting, or other issues, affecting the user experience. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a curtain cord reel, which solves the problem that traditional cord reels experience shaking or displacement due to external forces when the curtain cord is inserted or removed, thus affecting the winding or unfolding path of the cord.

[0004] To achieve the above objectives, this utility model provides a curtain cord winder, including a base and a shaft for winding external curtain cords. The base has a cord winding cavity for the shaft to rotate. The bottom wall of the base has two openings for the external cord to partially enter or exit the cord winding cavity. The two openings are located at opposite ends of the base. The bottom wall of the base is provided with a guide structure for guiding the direction of movement of the cord when the external cord is partially inserted or exited, and an adjustment structure for working in conjunction with the guide structure to apply pre-tension to the cord to adjust the cord tension.

[0005] The advantages of adopting the above technical solution are as follows: By setting the guiding structure and the adjusting structure in conjunction with each other on the bottom wall of the base, the core problem of the pull rope swaying and shifting in traditional rope reels is solved. The guiding structure can accurately constrain the movement direction of the pull rope when it goes in / out, avoiding path deviation caused by external interference, and ensuring that the pull rope is stably wound or unwound along the preset trajectory. The adjusting structure dynamically adjusts the tension of the pull rope by applying pre-tension, effectively suppressing the slack or tight state of the pull rope. The synergistic effect of the two can significantly improve the control accuracy of the pull rope by the rope reel, reduce phenomena such as uneven winding and jamming, extend the service life of the equipment, and at the same time ensure the smoothness of the curtain raising and lowering and the user's operating experience.

[0006] The present invention further comprises: an adjustment cavity is provided at each of the two opening positions of the base; two adjustment plates are provided in the adjustment cavity; the adjustment cavity is connected to the bottom wall of the rope winding cavity and forms a guide groove; guide pulleys are rotatably connected to each of the two adjustment plates; the two guide pulleys are in clearance fit and a winding gap is formed between the two guide pulleys for partial winding of the external rope; the two guide pulleys are partially extended through the guide groove and are respectively set at the two sides of the adjacent opening; the guide pulleys are the guide structure.

[0007] The advantages of adopting the above technical solution are as follows: By setting an adjustment plate and a gap fit structure of guide pulleys in the adjustment cavity, an efficient rope guiding mechanism is constructed. The winding gap formed by the two guide pulleys can accurately limit the winding path of the rope. The rotation connection design of the pulleys can significantly reduce the frictional resistance when the rope moves, avoiding the rope wear problem that is easily caused by traditional rigid guide structures. The layout of the pulleys on both sides of the opening can form a two-way constraint on the rope. Even under high-speed winding or sudden external force, the rope can still maintain the fit between the rope and the shaft, preventing stacking or jumping caused by uneven tension. This structure has both guiding accuracy and movement flexibility, and is especially suitable for high-frequency curtain systems, significantly improving equipment reliability.

[0008] The present invention further comprises: the adjustment cavity is connected to the bottom wall of the base and forms two adjustment holes, the two adjustment holes are arranged in a one-to-one correspondence with the positions of the two adjustment plates, the adjustment structure includes two adjustment shafts, the two adjustment shafts are arranged in a one-to-one correspondence with the two adjustment holes and are threadedly connected, the two adjustment shafts are respectively rotatably connected to their respective adjacent adjustment plates, and the adjustment holes are arranged perpendicularly to the bottom wall of the rope winding cavity.

[0009] The advantages of adopting the above technical solution are: the threaded connection design between the adjusting shaft and the adjusting hole in the above technology realizes the convenient and adjustable function of the preload. Users can drive the adjusting plate to move in a direction perpendicular to the bottom wall of the rope winding cavity by rotating the adjusting shaft, thereby changing the relative height of the two guide pulleys and accurately controlling the magnitude of the preload on the rope. The self-locking characteristic of the threaded connection can ensure that the adjusted preload is kept stable, avoiding the problem of elastic decay caused by long-term use of traditional spring structures.

[0010] The present invention further includes: a linkage shaft is provided on both sides of the guide pulley; a rotating shaft is rotatably connected between the guide pulley and the two linkage shafts; a sliding hole is provided on the adjustment plate corresponding to the position of the two linkage shafts; the ends of the two linkage shafts are slidably disposed in their respective corresponding sliding holes; and a micro-motion spring is connected between the ends of the two linkage shafts and the top wall of the adjustment plate; the micro-motion spring is sleeved on the linkage shaft.

[0011] The advantages of adopting the above technical solution are as follows: In the above technology, a linkage shaft, a sliding hole, and a micro-motion spring are added between the guide pulley and the adjusting plate to construct a dynamic tension compensation mechanism. The elastic deformation of the micro-motion spring can buffer external impact forces in real time. When the pull rope is subjected to a sudden external force, the linkage shaft slides in the sliding hole and compresses the spring. The elastic reaction force maintains the stability of the pull rope preload, avoiding sudden tension changes caused by rigid connection. This structure can provide constant basic tension during normal operation and absorb energy through the adaptive adjustment of the spring under extreme working conditions, effectively suppressing pull rope vibration and displacement. At the same time, the limiting effect of the sliding hole on the linkage shaft can prevent excessive pulley offset, ensuring that the guiding structure maintains accurate guiding performance for a long time and improving the system's anti-interference capability.

[0012] The present invention is further provided that a bearing is connected between the rotating shaft and the linkage shaft.

[0013] The advantages of adopting the above technical solution are: by setting a bearing between the rotating shaft and the linkage shaft, the rotation performance of the guide pulley is significantly optimized. The low friction characteristics of the bearing can greatly reduce the mechanical loss when the pulley rotates. Even under long-term high-load operation, it can still maintain a smooth rotation state and avoid the problem of rope dragging and jamming caused by excessive frictional resistance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of the present invention;

[0015] Figure 2 This is a cross-sectional view of the combined state of the guiding structure and the adjusting structure in this utility model;

[0016] Figure 3 This is a simplified schematic view showing the interaction between the guide pulley and the external curtain cord in this utility model. Detailed Implementation

[0017] This utility model provides a curtain cord winder, including a base 1 and a shaft 11 for winding external curtain cords. The base 1 has a cord winding cavity 12 rotatably connected to the shaft 11. The bottom wall of the base 1 has two openings 13 for partially inserting or exiting the cord winding cavity 12, located at opposite ends of the base 1. The bottom wall of the base 1 is provided with a guide structure for guiding the movement of the cord when partially inserting or exiting, and a pre-tensioning force applied to the cord in conjunction with the guide structure for adjustment. The tension adjustment structure for the pull rope includes an adjustment cavity 14 at each of the two openings 13 on the base 1. Each adjustment cavity 14 contains two adjustment plates 2. The adjustment cavity 14 is connected to the bottom wall of the rope winding cavity 12 and forms a guide groove 141. Guide pulleys 21 are rotatably connected to each of the two adjustment plates 2. The two guide pulleys 21 are in clearance fit, and a winding gap 211 is formed between them for partial winding of the pull rope. The two guide pulleys 21 partially extend out of the guide groove 141 and are positioned separately. The guide pulleys 21 are positioned on both sides of the adjacent openings 13, serving as the guiding structure. The adjusting cavity 14 connects to the bottom wall of the base 1 and forms two adjusting holes 15. The two adjusting holes 15 are positioned one-to-one with the two adjusting plates 2. The adjusting structure includes two adjusting shafts 22, which are threadedly connected to the two adjusting holes 15. The two adjusting shafts 22 are rotatably connected to their respective adjacent adjusting plates 2. The adjusting holes 15 are perpendicular to the bottom wall of the winding cavity 12. The guide pulley 21 is provided with a linkage shaft 23 on both sides. The guide pulley 21 is rotatably connected to the two linkage shafts 23 by a rotating shaft 231. The adjusting plate 2 is provided with a sliding hole 24 corresponding to the position of the two linkage shafts 23. The ends of the two linkage shafts 23 are slidably disposed in their respective corresponding sliding holes 24, and the ends of the two linkage shafts 23 are connected to the top wall of the adjusting plate 2 by a micro spring 25. The micro spring 25 is sleeved on the linkage shaft 23. The rotating shaft 231 is connected to the linkage shaft 23 by a bearing 232.

[0018] The external curtain cord described in the above technology is attached to the instruction manual. Figure 3 The symbol 3 is used for illustration only.

[0019] The accompanying drawings in the above technical specifications are for reference and illustration only. Their specific dimensions and shapes are not limited and can be adjusted according to actual production and assembly requirements.

[0020] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A curtain cord winder, comprising a base and a shaft for winding an external curtain cord, wherein the base has a cord winding cavity for rotatably connecting the shaft, and the bottom wall of the base has two openings for the external curtain cord to partially enter or exit the cord winding cavity, the two openings being located at opposite ends of the base, characterized in that: The base bottom wall is provided with a guide structure for guiding the movement direction of the pull rope when the external pull rope is partially inserted or protruded, and an adjustment structure for working in conjunction with the guide structure to apply pre-tension to the pull rope to adjust the tension of the pull rope.

2. A curtain cord reel according to claim 1, characterized in that: The base is provided with adjustment cavities at the two opening positions. Two adjustment plates are provided in the adjustment cavities. The adjustment cavities are connected to the bottom wall of the rope winding cavity and form guide grooves. Guide pulleys are rotatably connected to the two adjustment plates. The two guide pulleys are in clearance fit and a winding gap is formed between the two guide pulleys for the external rope to be partially wound. The two guide pulleys are partially inserted through the guide grooves and are respectively set at the two sides of the adjacent openings. The guide pulleys are the guide structure.

3. A curtain cord reel according to claim 2, characterized in that: The adjustment cavity is connected to the bottom wall of the base and forms two adjustment holes. The two adjustment holes are arranged in a one-to-one correspondence with the positions of the two adjustment plates. The adjustment structure includes two adjustment shafts, which are threadedly connected to the two adjustment holes. The two adjustment shafts are rotatably connected to their respective adjacent adjustment plates. The adjustment holes are arranged perpendicularly to the bottom wall of the rope winding cavity.

4. A curtain cord reel according to claim 3, characterized in that: Both sides of the guide pulley are provided with linkage shafts, and the guide pulley is rotatably connected to the two linkage shafts by a rotating shaft. The adjustment plate is provided with sliding holes corresponding to the positions of the two linkage shafts. The ends of the two linkage shafts are slidably set in their respective corresponding sliding holes, and the ends of the two linkage shafts are connected to the top wall of the adjustment plate by a micro-motion spring. The micro-motion spring is sleeved on the linkage shaft.

5. A curtain cord reel according to claim 4, characterized in that: A bearing is connected between the rotating shaft and the linkage shaft.

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