Rope winding device of shutter

Abstract

The utility model relates to the technical field of shutters, and discloses a rope winding device of a shutter, which comprises a mounting seat, a rotatable rotating rod arranged in the mounting seat, two rope winding shafts symmetrically arranged outside the rotating rod and capable of moving along the length direction of the rotating rod, and a reciprocating component arranged on the rotating rod and capable of moving along the length direction of the rotating rod. The reciprocating moving assembly comprises a double-thread lead screw and a gear connecting piece, the double-thread lead screw is arranged in the mounting base, and the double-thread lead screw can synchronously rotate along with the rotating rod through the gear connecting piece; by arranging the reciprocating moving assembly, rotation of the double-thread lead screw can be achieved, when the rope is wound, the rope winding shaft can synchronously move transversely, the winding position of the rope on the rope winding shaft is evenly changed while the rope is wound and unwound, the rope on the rope winding shaft is always kept neat and orderly, and the rope winding efficiency is improved. And high efficiency and stability of the whole rope winding and unwinding process are ensured.

Description

Technical Field

[0001] This utility model relates to the field of venetian blind technology, and in particular to a venetian blind cord winding device. Background Technology

[0002] Venetian blinds are a common window shading and privacy protection device, consisting of multiple parallel slats. The amount of light entering and the visibility of the view can be controlled by adjusting the angle of the slats. The cord winding mechanism of Venetian blinds is one of its important components, responsible for controlling the raising, lowering and rotating of the slats, thereby achieving effective management of light and privacy.

[0003] Current venetian blind cord rewinding devices mainly consist of a cord rewinding base and a rotatable cord rewinding shaft (drum) located inside it. In actual operation, the cord rewinding shaft mostly rotates in a fixed position. This fixed-position rotation method has obvious drawbacks: due to the lack of an effective guidance or adjustment mechanism, the cord is very likely to be concentrated and wrapped in a certain part of the cord rewinding shaft when rewinding. As the amount of cord rewinding increases, the cord thickness in this part will be much greater than in other areas. This not only leads to a messy cord arrangement, affecting the smooth release of the cord, but may also damage the cord due to excessive local stress, reducing the cord's service life and safety. When the cord needs to be released, this messy arrangement will seriously hinder the smooth release of the cord, and may cause problems such as jamming, tangling, and knotting, greatly affecting the normal use and operation of the venetian blinds. On the other hand, excessively thick rope buildup in certain areas can cause a sharp increase in pressure and friction in that area, resulting in localized stress on the rope that far exceeds its normal tolerance. Over time, this excessive localized stress will gradually damage the internal structure of the rope, leading to wear, breakage, and other damage, ultimately reducing the rope's service life. Utility Model Content

[0004] This utility model proposes a cord winding device for louvers to solve the problems of existing cord winding devices causing the cords to be arranged in a disorderly manner, affecting the smoothness of subsequent cord release; and also potentially causing damage to the cords due to excessive local stress.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cord winding device for a venetian blind, including a mounting base, a rotatable rotating rod installed inside the mounting base, two cord winding shafts symmetrically arranged outside the rotating rod, the cord winding shafts being movable along the length direction of the rotating rod, and further including:

[0006] A reciprocating moving assembly includes a double-threaded lead screw and a gear connector. The double-threaded lead screw is located inside a mounting base. The gear connector allows the double-threaded lead screw to rotate synchronously with a rotating rod. The gear connector connects the double-threaded lead screw and the rotating rod. Two lead screw nut seats are symmetrically mounted on the outside of the double-threaded lead screw. Each lead screw nut seat is connected to a collar on its outside. The collar is sleeved on the outside of the rope winding shaft near its end, and the rope winding shaft is rotatably connected to the collar.

[0007] Preferably, the gear connecting member includes:

[0008] The first toothed ring is fixed to one end of the outer side of the rotating rod;

[0009] The second toothed ring is fixed to the outer end of the double-threaded screw and is engaged with the first toothed ring.

[0010] Preferably, guide grooves are provided at both ends of the outer wall of the rotating rod along the length direction, and a guide strip is fixed to the inner wall of the rope winding shaft, the guide strip being slidably fitted into the guide groove.

[0011] Preferably, an annular protrusion is fixed on the outer wall of the winding shaft near its end, and an annular groove is formed on the inner wall of the collar, with the annular protrusion slidingly fitted into the annular groove.

[0012] Preferably, a threading hole is provided on the outer wall of the annular protrusion, directly opposite the position of the rope winding shaft.

[0013] Preferably, a connecting wheel is installed at the end of the rotating rod, and a groove is formed on the outer circumference of the connecting wheel.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] (1) By setting a reciprocating moving component, when the rope is wound and released, the first toothed ring drives the second toothed ring to rotate, thereby realizing the rotation of the double threaded screw. This allows the rope shaft to move laterally synchronously when the rope is wound, so that the rope winding position on the rope shaft can be changed evenly while the rope is wound and released, ensuring that the rope winding on the rope shaft is always neat and orderly, thus ensuring the efficiency and stability of the entire rope winding and releasing process.

[0016] (2) The guide bar moves in a straight line along the guide groove, which effectively avoids unstable phenomena such as left and right deviation, swaying or twisting that may occur during the movement of the rope shaft, thus greatly ensuring the stability of the rope shaft during movement; the annular convex bar slides along the annular groove, which can ensure that the rope shaft moves laterally while rotating synchronously with the rotating rod when winding and unwinding the rope, so that the winding and unwinding of the rope can be carried out in a stable and coordinated state. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a structural diagram of the mounting base of this utility model in the removed state;

[0020] Figure 3 This is a schematic diagram of the structure of the rope winding shaft of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the collar of this utility model;

[0022] In the diagram: 1. Mounting base; 2. Rotating rod; 3. Rope winding shaft;

[0023] 4. Reciprocating moving assembly; 41. Double threaded lead screw; 42. First toothed ring; 43. Second toothed ring; 44. Lead screw nut seat; 45. Collar;

[0024] 5. Threading hole; 6. Guide groove; 7. Connecting wheel; 8. Guide bar; 9. Annular convex bar; 10. Annular groove. Detailed Implementation

[0025] 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.

[0026] This utility model provides, for example Figures 1-4The illustrated cord rewinding device for a venetian blind includes a mounting base 1. A rotatable rotating rod 2 is installed inside the mounting base 1. Two cord rewinding shafts 3 are symmetrically arranged on the outside of the rotating rod 2. A threading hole 5 is opened on the outer wall of an annular protrusion 9, directly opposite the position of the cord rewinding shaft 3. The window cord wound on the cord rewinding shaft 3 passes through the corresponding threading hole 5. The cord rewinding shaft 3 can move along the length direction of the rotating rod 2. A connecting wheel 7 is installed at the end of the rotating rod 2. A cord groove is opened on the outer circumference of the connecting wheel 7. The shape and size of this cord groove are adapted to the pull cord to be installed later. In the inner wall of the cord groove, bead grooves are opened. These bead grooves are evenly distributed to provide just the right rolling space for the beads. The pull cord is spaced with beads. When the pull cord is inserted into the cord groove, the beads will naturally embed into the groove. In this way, when the user pulls the pull cord from the outside, the smooth rolling of the beads in the groove can efficiently convert the pulling force into the rotational power of the connecting wheel 7, thereby accurately making the connecting wheel 7 rotate in the expected direction and speed.

[0027] In addition, the cord winding device of the louver also includes a reciprocating moving component 4, which includes a double-threaded screw 41 and a gear connector. The double-threaded screw 41 is located inside the mounting base 1. The gear connector allows the double-threaded screw 41 to rotate synchronously with the rotating rod 2. A gear connector is connected between the double-threaded screw 41 and the rotating rod 2. Two screw nut seats 44 are symmetrically installed on the outside of the double-threaded screw 41. Each screw nut seat 44 is connected to a collar 45. The collar 45 is sleeved on the outside of the cord winding shaft 3 near the end, and the cord winding shaft 3 is rotatably connected to the collar 45.

[0028] See Figure 2 As shown, the gear connecting component includes:

[0029] The first toothed ring 42 is fixed to one end of the outer side of the rotating rod 2;

[0030] The second toothed ring 43 is fixed to the outer end of the double-threaded screw 41 and is engaged with the first toothed ring 42.

[0031] See Figure 2 and Figure 3 As shown, guide grooves 6 are provided at both ends of the outer wall of the rotating rod 2 along the length direction. A guide bar 8 is fixed on the inner wall of the rope winding shaft 3. The guide bar 8 slides in the guide groove 6. The guide bar 8 moves in a straight line along the guide groove 6, which effectively avoids unstable phenomena such as left and right deviation, swaying or twisting that may occur during the movement of the rope winding shaft 3. This greatly ensures the stability of the rope winding shaft 3 when it moves, so that the associated rope pulling and releasing actions can be carried out more accurately and orderly.

[0032] See Figure 3 and Figure 4 As shown, an annular protrusion 9 is fixed on the outer wall of the rope winding shaft 3 near its end, and an annular groove 10 is provided on the inner wall of the collar 45. The annular protrusion 9 slides in the annular groove 10. By using the annular protrusion 9 to slide along the annular groove 10, it is possible to ensure that the rope winding shaft 3 moves laterally while rotating synchronously with the rotating rod 2 during rope winding and unwinding. This allows the rope winding and unwinding actions to be carried out in a stable and coordinated state, greatly improving the accuracy and reliability of the entire mechanical device.

[0033] In summary, in practical use, the rotating rod 2 is driven to rotate by the forward or reverse rotating connecting wheel 7, thereby rotating the rope winding shaft 3 and realizing the winding and unwinding of the rope. Specifically, while the connecting wheel 7 rotates, the first toothed ring 42 drives the meshing second toothed ring 43 to rotate, thereby realizing the rotation of the double threaded screw 41. This allows the rope winding shaft 3 to move laterally synchronously when the connecting wheel 7 rotates to wind the rope. While winding and unwinding the rope, the winding position of the rope on the rope winding shaft 3 is changed evenly, ensuring that the rope winding on the rope winding shaft 3 remains neat and orderly. This ensures the efficiency and stability of the entire rope winding and unwinding process, greatly improving the reliability and practicality of the mechanical device and providing a strong guarantee for the smooth winding and unwinding of the blinds.

[0034] 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 cord winding device for a venetian blind, comprising a mounting base (1), wherein a rotatable rotating rod (2) is mounted inside the mounting base (1), and two cord winding shafts (3) are symmetrically arranged on the outside of the rotating rod (2), characterized in that, The rope winding shaft (3) can move along the length direction of the rotating rod (2), and also includes: A reciprocating moving assembly (4) includes a double-threaded lead screw (41) and a gear connector. The double-threaded lead screw (41) is located inside the mounting base (1). The gear connector allows the double-threaded lead screw (41) to rotate synchronously with the rotating rod (2). A gear connector connects the double-threaded lead screw (41) and the rotating rod (2). Two lead screw nut seats (44) are symmetrically installed on the outside of the double-threaded lead screw (41). A collar (45) is connected to the outside of each lead screw nut seat (44). The collar (45) is sleeved on the outside of the rope winding shaft (3) near the end. The rope winding shaft (3) is rotatably connected to the collar (45).

2. The cord winding device for a venetian blind according to claim 1, characterized in that: The gear connector includes: The first toothed ring (42) is fixed to one end of the outer side of the rotating rod (2); The second toothed ring (43) is fixed to the outer end of the double-threaded screw (41) and is engaged with the first toothed ring (42).

3. The cord winding device for a venetian blind according to claim 1, characterized in that: The outer walls of the rotating rod (2) are provided with guide grooves (6) along the length direction at both ends. The inner wall of the rope winding shaft (3) is fixed with a guide strip (8), which slides in the guide groove (6).

4. The cord winding device for a venetian blind according to claim 1, characterized in that: An annular protrusion (9) is fixed on the outer wall of the winding shaft (3) near the end, and an annular groove (10) is provided on the inner wall of the collar (45), and the annular protrusion (9) is slidably fitted into the annular groove (10).

5. The cord winding device for a venetian blind according to claim 4, characterized in that: A threading hole (5) is provided on the outer wall of the annular protrusion (9) and at the position directly opposite the rope winding shaft (3).

6. The cord winding device for a venetian blind according to claim 1, characterized in that: The end of the rotating rod (2) is equipped with a connecting wheel (7), and the outer circumference of the connecting wheel (7) is provided with a groove.

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