An outswinging structure for a roller blind controller

Abstract

The utility model discloses a kind of outer rotation structures for roller shutter controller, including outer rotating cylinder;The one end of outer rotating cylinder is equipped with opening, outer rotating cylinder is set in the outside of inner rotating cylinder by opening, and the other end of outer rotating cylinder is equipped with the rotating shaft of axial extension;Including one-way rotating cylinder;The one-way rotating cylinder is equipped with the center hole of being adapted with rotating shaft, one-way rotating cylinder is set in the outside of rotating shaft by center hole, and rotating shaft is equipped with one-way rotating piece between one-way rotating cylinder;The outside of one-way rotating cylinder is equipped with the limit baffle corresponding with the limit protruding of reel inside.This utility model's outer rotation structure can be directly used in current pull-bead type roller shutter controller, replace current outer rotating cylinder, realize lossless replacement, solve the technical problem that current outer rotating cylinder can still drive reel to continue reverse after roller shutter reaches lowest point, effectively avoid that roller shutter reversely winds on reel.

Description

Technical Field

[0001] This utility model belongs to the technical field of roller blind accessories, specifically relating to an external rotating structure for a roller blind controller. Background Technology

[0002] A beaded roller blind is a window shading product that controls the raising, lowering, and positioning of the blind by pulling a chain of small beads (beads). Its core mechanism consists of a controller connected to one end of the blind shaft and the bead chain. The controller not only transmits power but also provides anti-reverse rotation (preventing the blind from rotating the bead chain) and blind positioning (keeping the blind suspended at its current position). The controller's structure mainly includes a base, an inner rotating cylinder, and an outer rotating cylinder. The base is fixed to the wall and has a horizontal limiting shaft. The inner rotating cylinder is fitted outside the limiting shaft, and its bottom is connected to the limiting shaft via planetary gears. A retaining spring is located in the middle of the inner rotating cylinder and the limiting shaft, with horizontal grooves on the inner rotating cylinder to expose the ends of the retaining spring. The outer rotating cylinder is fitted outside the inner rotating cylinder and has a limiting strip corresponding to the horizontal grooves, located between the ends of the retaining spring. The blind's roller is fitted outside the outer rotating cylinder, and its interior has a limiting protrusion that matches the outer rotating cylinder to prevent relative rotation between the two. The bottom of the inner rotating drum is equipped with a chain disc that matches the beaded chain. When the chain disc rotates under the drive of the beaded chain, it drives the inner rotating drum, outer rotating drum, and roller drum to rotate synchronously, thereby realizing the raising and lowering of the roller blind. At the same time, the inner rotating drum will drive the retaining spring to rotate on the limiting shaft (because the direction in which the inner rotating drum drives the retaining spring to rotate is the direction in which the retaining spring diameter increases, thus allowing it to rotate on the limiting shaft). If the roller drum drives the inner rotating drum to rotate, the inner rotating drum will drive the retaining spring to rotate in the opposite direction, in the direction in which the retaining spring diameter decreases. The retaining spring diameter decreases and clamps tightly to the limiting shaft, so neither the roller drum nor the inner rotating drum can rotate, thus achieving the functions of anti-reverse rotation and roller blind positioning.

[0003] However, the above controller has the following problems: 1. The beaded chain is a closed loop structure. Pulling the two sides of the beaded chain lowers and raises the roller blind respectively. If the roller blind controller does not have a lower limit switch (used to limit the roller blind from descending to the lowest point), and the beaded chain is still being pulled after descending to the lowest point, the roller will continue to rotate, but the roller blind will be wound around the roller in the opposite direction (from the side away from the window), which increases the indirect light between the roller blind and the window (normally, the roller blind should be wound around the roller from the side closer to the window, so that the roller blind is adjacent to the window, provides tight shading, and minimizes light leakage). Insufficient shading leads to light leakage.

[0004] 2. To address problem 1, the existing solution is to add a lower limit component. The main structure of this component consists of a lead screw and a lead screw sleeve. During installation, the number of rotations of the lead screw is adjusted according to the height of the roller blind. That is, when the roller blind descends to its lowest point, the lead screw sleeve should be rotated to the end of the lead screw, thus preventing the roller from continuing to rotate. However, adding a lower limit component increases costs. Furthermore, its installation is overly complicated; the position of the lead screw sleeve on the lead screw needs to be adjusted little by little according to the actual height of the roller blind, making it impossible to adjust it perfectly in one go, significantly increasing the installation difficulty.

[0005] Therefore, existing roller shutter controllers still need to overcome the above problems while also taking cost into account. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an external rotating structure for a roller shutter controller, including an outer rotating cylinder; one end of the outer rotating cylinder has an opening, through which the outer rotating cylinder is fitted onto the outside of the inner rotating cylinder, and the other end of the outer rotating cylinder has an axially extending rotating shaft; it also includes a one-way rotating cylinder; the one-way rotating cylinder has a central hole adapted to the rotating shaft, through which the one-way rotating cylinder is fitted onto the outside of the rotating shaft, and a one-way rotating component is provided between the rotating shaft and the one-way rotating cylinder; the outside of the one-way rotating cylinder is provided with a limiting baffle corresponding to a limiting protrusion inside the roller shutter.

[0007] A preferred embodiment of the outer rotating structure in this invention is as follows: the inner side of the outer rotating cylinder is provided with limiting strips that correspond one-to-one with the two transverse grooves of the inner rotating cylinder. The two transverse grooves of the inner rotating cylinder are symmetrically distributed, and the width of the transverse grooves is greater than the distance between the two ends of the retaining springs. The limiting strips are located between the two ends of the retaining springs, and both ends of the retaining springs extend radially outward. When the outer rotating cylinder rotates, the limiting strips block the ends of the retaining springs, causing the diameter of the retaining springs to increase or decrease, thereby achieving unidirectional transmission.

[0008] The preferred embodiment of the outer rotating structure in this utility model is as follows: multiple limiting baffles are provided, and all limiting baffles are evenly distributed along the circumference of the outer rotating cylinder. A balance cylinder is included; the balance cylinder has openings at both ends, and the balance cylinder and the outer rotating cylinder are sequentially fitted onto the outside of the inner rotating cylinder. The balance cylinder has balance baffles that correspond one-to-one with all the limiting baffles. After the unidirectional rotating cylinder extends into the drum, due to the small contact area between the limiting baffles and the drum, the unidirectional rotating cylinder is prone to eccentricity when driving the drum to rotate. However, the balance baffles of the balance cylinder are the same size as the limiting baffles, and both are supported inside the drum. The balance cylinder rotates synchronously with the drum, providing more stable support and effectively solving the problem of drum rotation eccentricity.

[0009] The beneficial effects of the external rotating structure in this utility model are as follows: 1. Compared to existing external rotating drums, this design adds a one-way rotation function. During the roller blind's ascent, the external rotating drum rotates synchronously in the forward direction with the one-way rotating drum via a one-way rotating component. During the roller blind's descent, the external rotating drum reverses direction, and the one-way rotating drum descends along with it due to the combined effects of the roller blind's weight and the one-way transmission of the retaining spring. When the roller blind reaches its lowest point, if the external rotating drum continues to reverse direction, the presence of the one-way rotating component causes relative rotation between the two drums. At this point, the external rotating drum cannot drive the one-way rotating drum to continue reversing, thus solving the technical problem of existing designs where the external rotating drum can still drive the roller blind to continue reversing after the roller blind reaches its lowest point, effectively preventing the roller blind from winding backwards onto the roller blind.

[0010] 2. The improved outer rotating cylinder, along with the added unidirectional rotating cylinder and balance cylinder, are sequentially assembled to form an outer rotating structure of the same size as the existing outer rotating cylinder. This structure can completely replace the existing outer rotating cylinder, meaning it can be directly used in existing beaded roller blind controllers for a non-destructive replacement. Without altering any other components of the beaded roller blind controller, simply replacing the existing outer rotating cylinder structure achieves the same function as the existing lower limit component, without adding any other parts, thus helping to control costs.

[0011] 3. Compared with the existing installation method of the lower limit component, there is no need for repeated adjustments. Only the existing outer rotating cylinder needs to be replaced. The whole installation process is very simple and greatly reduces the installation difficulty. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the external rotating structure used in the roller shutter controller of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the external rotating structure used in the roller shutter controller of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the external rotating structure used in the roller shutter controller of this utility model. Figure 3 ; Figure 4 for Figure 1 A diagram illustrating the breakdown; Figure 5 This is a schematic diagram of the structure of the roller shutter controller in this utility model. Figure 1 ; Figure 6This is a schematic diagram of the structure of the roller shutter controller in this utility model. Figure 2 ; Figure 7 for Figure 6 A schematic diagram showing the hidden scroll in the middle; Figure 8 for Figure 7 A schematic diagram showing the concealed outer rotating cylinder and one-way rotating cylinder; Figure 9 for Figure 8 A schematic diagram showing the hidden balance cylinder.

[0014] Reference numerals in the attached diagram: 1. Outer rotating cylinder; 2. One-way rotating cylinder; 3. Balance cylinder; 4. Center hole; 5. One-way rotating component; 6. Rotating shaft; 7. Transverse groove; 8. Limiting strip; 9. Snap ring; 10. Limiting protrusion; 11. Limiting baffle; 12. Bead chain; 13. Balance baffle; 14. Base; 15. Inner rotating cylinder; 16. Limiting shaft; 17. Planetary gear set; 18. Fastener; 19. Through hole; 20. Drum. Detailed Implementation

[0015] In view of the shortcomings of the prior art, the inventor of this utility model has, through long-term research and extensive practice, proposed the technical solution of this utility model. The following will further explain and illustrate the technical solution, its implementation process, and its principles in conjunction with the accompanying drawings and specific implementation examples.

[0016] Example 1: like Figure 1 and Figure 4 As shown, Embodiment 1 provides an external rotating structure for a roller shutter controller. The external rotating structure includes an outer rotating cylinder 1, a one-way rotating cylinder 2, and a balancing cylinder 3. The outer rotating cylinder 1, one-way rotating cylinder 2, and balancing cylinder 3 are all cylindrical. The outer rotating cylinder 1 has an opening at one end, the balancing cylinder 3 has openings at both ends, and the one-way rotating cylinder 2 has a central hole 4 at one end. The one-way rotating cylinder 2 contains a one-way rotating component 5, which is a one-way bearing, but not limited to one-way bearings; it can also be other unidirectional rotating mechanisms, such as a one-way rotating ratchet and pawl mechanism. In this embodiment, the outer rotating cylinder 1 is fitted onto the outside of the inner rotating cylinder 15 through the opening, and the other end of the outer rotating cylinder 1 has an axially extending rotating shaft 6. The one-way rotating cylinder 2 is fitted onto the outside of the rotating shaft 6 through the central hole 4. The inner ring of the one-way bearing is coaxially fixed with the rotating shaft 6, and the outer ring of the one-way bearing is coaxially fixed with the one-way rotating cylinder 2. The one-way rotating cylinder 2 allows the one-way rotating cylinder 2 and the outer rotating cylinder 1 to rotate only in one direction.

[0017] In addition, in this embodiment, the central hole 4 passes through both ends of the one-way rotating drum 2. The rotating shaft 6 can be installed from one end of the one-way rotating drum 2 or from the other end. The direction of rotation is different depending on the installation direction of the one-way rotating drum 2. The one-way rotating drum 2 and the rotating shaft 6 form a detachable connection, and the installation direction of the one-way rotating drum 2 can be adjusted according to the actual installation situation to meet the left and right installation requirements of the roller blind. For example, if the roller blind controller with the one-way rotating drum 2 is installed at the left end of the drum, the roller blind will rise when the controller rotates the drum in the forward direction and fall in the reverse direction. If the roller blind controller with the one-way rotating drum 2 is installed at the right end of the drum, the roller blind will fall when the controller rotates the drum in the forward direction and rise in the reverse direction.

[0018] like Figure 3 As shown, the existing roller blind controller's inner rotating drum 15 has two transverse grooves 7, which are symmetrically distributed. In this embodiment, the outer rotating drum 1 has a limiting strip 8 inside that corresponds one-to-one with the two transverse grooves 7 of the inner rotating drum 15. The width of the transverse groove 7 is greater than the distance between the two ends of the retaining spring 9. The limiting strip 8 is located between the two ends of the retaining spring 9, and both ends of the retaining spring 9 extend radially outward. When the outer rotating drum 1 rotates, the limiting strip 8 blocks the end of the retaining spring 9, thereby reducing the diameter of the retaining spring 9 and preventing the outer rotating drum 1 from driving the inner rotating drum 15 to rotate. That is, only the inner rotating drum 15 is allowed to drive the outer rotating drum 1 to rotate (equivalent to only being able to drive the roller blind to rise and fall through the bead chain 12, and not being able to drive the bead chain 12 to rotate through the gravity of the roller blind, thus realizing the roller blind's suspension and positioning at any position and unidirectional transmission).

[0019] like Figure 2 As shown, to adapt to the roller shutter's drum 20, a limiting baffle 11 corresponding to the limiting protrusion 10 inside the drum 20 is provided on the outside of the one-way rotating drum 2. There are six limiting baffles 11, all evenly distributed along the circumference of the outer rotating drum 1. In this embodiment, the balance drum 3 and the outer rotating drum 1 are sequentially fitted onto the outside of the inner rotating drum 15, and the balance drum 3 has balance baffles 13 corresponding one-to-one with the six limiting baffles 11. After the one-way rotating drum 2 extends into the drum 20, due to the small contact area between the limiting baffles 11 and the drum 20, the one-way rotating drum 2 is prone to eccentricity when driving the drum 20 to rotate. However, the balance baffles 13 of the balance drum 3 are the same size as the limiting baffles 11, and both are supported inside the drum 20. The balance drum 3 rotates synchronously with the drum 20, providing more stable support for the drum 20 and effectively solving the problem of eccentricity during drum 20 rotation.

[0020] Example 2: like Figure 5 and Figure 9As shown, Embodiment 2 provides a roller shutter controller, including a base 14, an inner rotating cylinder 15, and an outer rotating structure as described in Embodiment 1. The base 14 is provided with a limiting shaft 16, and multiple retaining springs 9 are sleeved on the limiting shaft 16. The specific number of retaining springs 9 is not limited and depends on the length of the limiting shaft 16. Both ends of each retaining spring 9 extend radially outward. The inner rotating cylinder 15 is sleeved outside the limiting shaft 16, and both ends of each retaining spring 9 are located at the transverse groove 7 of the inner rotating cylinder 15. A planetary gear set 17 is also provided between the bottom of the inner rotating cylinder 15 and the base 14. The planetary gears of the planetary gear set 17 are coaxially rotatably connected to the fixing pin of the inner rotating cylinder 15. The fixing pin and the inner rotating cylinder 15 form an integral unit, equivalent to a planet carrier. The sun gear of the planetary gear set 17 is fixed to the outside of the limiting shaft 16, and the gear ring of the planetary gear set 17 is integrated with the chain.

[0021] like Figure 6 , Figure 7 and Figure 8 As shown, in order to install the aforementioned outer rotating structure into the inner rotating cylinder 15 of the existing roller shutter controller, this embodiment also includes a fastener 18. The fastener 18 adopts a conventional bolt, screw, or similar structure. A threaded hole adapted to the fastener 18 is provided at the end of the limiting shaft 16, while the rotating shaft 6 has a through hole 19 extending through both ends. One end of the fastener 18 passes through the through hole 19 and the inner rotating cylinder 15 (the end of the inner rotating cylinder 15 also has a hole for the fastener 18 to pass through) and is then locked to the limiting shaft 16. The diameter of the other end of the fastener 18 is larger than the center hole 4 (if the end of the fastener 18 is smaller than the center hole 4, a shim with a diameter larger than the center hole 4 can be added). In this embodiment, the balance cylinder 3, outer rotating cylinder 1, and one-way rotating cylinder 2 are sequentially fitted onto the outside of the inner rotating cylinder 15. After the fastener 18 is tightened, the axial movement of the one-way rotating cylinder 2 is restricted, and the outer rotating structure is connected and locked to the inner rotating cylinder 15.

[0022] This embodiment also provides a method for rolling up a beaded roller blind. When the roller blind is at its lowest point, a beaded chain 12 is randomly pulled. This beaded chain 12 is defined as beaded chain A 12. If beaded chain A 12 drives the chain disk to rotate forward, the chain disk drives the inner rotating drum 15 to rotate through the planetary gear set 17. The inner rotating drum 15 drives the outer rotating drum 1 to rotate synchronously by pushing the limiting strip 8. The outer rotating drum 1 then drives the one-way rotating drum 2 to rotate forward through the one-way bearing. The one-way rotating drum 2 then pushes the limiting protrusion 10 of the roller drum 20 to rotate through the limiting baffle 11. Finally, the roller drum 20 and the balance drum 3 rotate synchronously forward, and the roller blind is wound on the roller drum 20, realizing the roller blind rising. When it rises to the highest point, the pulling of beaded chain A 12 is stopped, and the roller blind is rolled up. If one of the bead chains 12 is randomly pulled (bead chain B), bead chain B will correspondingly cause the chain to rotate in the opposite direction. The transmission method is the same as the forward rotation described above, but the direction of rotation is opposite. However, the inner ring of the one-way bearing can only drive the outer ring to rotate in the forward direction. The reverse rotation of the inner ring cannot drive the outer ring to rotate synchronously. Therefore, the outer rotating drum 1 and the one-way rotating drum 2 rotate relative to each other. Pulling bead chain B cannot make the roller drum 20 rotate synchronously in the reverse direction, and the roller blind cannot roll up. Therefore, it can be determined that the selected bead chain 12 is incorrect, and another bead chain 12 should be pulled to make the roller blind rise.

[0023] This embodiment also provides a method for lowering a beaded roller blind. When the roller blind is at its top, a beaded chain 12 is randomly pulled. If the beaded chain 12 is chain A, it cannot be pulled because the roller blind is at its top, thus indicating that the selected beaded chain 12 is incorrect. The other beaded chain 12 must be chain B. Pulling chain B reverses the chain, causing the outer rotating drum 1 to reverse as well. The one-way rotating drum 2 and the roller 20 descend synchronously with the outer rotating drum 1 under the weight of the roller blind. When the roller blind reaches its bottom, if chain B is pulled further, the outer rotating drum 1 and the one-way rotating drum 2 will rotate relative to each other. Therefore, the outer rotation drives the roller 20 of the one-way rotating drum 2 to reverse, effectively solving the existing technical problem that the outer rotating drum 1 can still drive the roller blind to wind backwards onto the roller 20 after the roller blind reaches its lowest point.

[0024] It should be understood that the above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. It should not be considered that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. An external rotating structure for a roller shutter controller, characterized in that: It includes an outer rotating cylinder; one end of the outer rotating cylinder is provided with an opening, the outer rotating cylinder is sleeved on the outside of the inner rotating cylinder through the opening, and the other end of the outer rotating cylinder is provided with an axially extending rotating shaft; It includes a one-way rotating drum; the one-way rotating drum is provided with a central hole adapted to the rotating shaft, the one-way rotating drum is sleeved on the outside of the rotating shaft through the central hole, and a one-way rotating component is provided between the rotating shaft and the one-way rotating drum; the outside of the one-way rotating drum is provided with a limiting baffle corresponding to the limiting protrusion inside the drum.

2. The external rotating structure for a roller shutter controller according to claim 1, characterized in that: The outer rotating cylinder has a limiting strip inside that corresponds one-to-one with the two transverse grooves of the inner rotating cylinder.

3. The external rotating structure for a roller shutter controller according to claim 1, characterized in that: The central hole extends through both ends of the unidirectional rotating cylinder.

4. The external rotating structure for a roller shutter controller according to claim 1, characterized in that: The limiting baffle is provided in multiple parts, and all the limiting baffles are evenly distributed along the circumference of the outer rotating cylinder.

5. The external rotating structure for a roller shutter controller according to claim 4, characterized in that: It includes a balance cylinder; the balance cylinder has openings at both ends, and the balance cylinder and the outer rotating cylinder are sequentially sleeved on the outside of the inner rotating cylinder, and the balance cylinder is provided with balance baffles that correspond one-to-one with all the limiting baffles.

6. A roller shutter controller, characterized in that: The rotating structure includes the external rotating structure according to any one of claims 1-5, and also includes a fastener. The rotating shaft has through holes at both ends. One end of the fastener passes through the through hole and the inner rotating cylinder and is locked to the limiting shaft. The diameter of the other end of the fastener is larger than that of the central hole.

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