A quiet roller shutter door

Abstract

The application belongs to the technical field of rolling shutter door, and particularly relates to a mute rolling shutter door, which comprises a rolling shutter, a guide side strip, an upper positioning wheel, a lower positioning wheel and a pull rope. The upper positioning wheel is arranged above the guide side strip. The lower positioning wheel is arranged below the guide side strip. The lower end of the rolling shutter is fixedly connected with one end of the pull rope. The pull rope is wound around the lower positioning wheel after extending from the lower end of the guide side strip. The rolling shutter is driven to move up and down along the track of the guide side strip by the pull rope winding around the positioning wheel. The accurate position of the upper positioning wheel and the lower positioning wheel makes the rolling shutter be on the center line of the guide side strip, thereby reducing the friction probability between the rolling shutter and the guide side strip during the rolling-up and rolling-out process, so as to prevent the friction noise caused by the hard contact. In the scheme, the rolling shutter is pulled by the pull rope and is in the straightened state. Because of the accurate position of the upper positioning wheel and the lower positioning wheel, the rolling shutter does not rub against the guide side strip when moving in the guide side strip, thereby achieving the mute purpose.

Description

Technical Field

[0001] This invention belongs to the field of roller shutter technology, specifically a silent roller shutter door. Background Technology

[0002] In daily use, the operating noise of traditional roller shutters has always been a significant factor affecting user experience. The structural design of conventional roller shutters often focuses on basic opening and closing functions, with insufficient optimization for noise reduction. During the rolling and unrolling process, the collision between the slats and the friction between the slats and the guide rail are the main sources of noise. Especially when the roller shutter is large or has been used for a long time, the slats may sag due to their own weight or the track may deform slightly, leading to uneven gaps between the slats and the track, further increasing friction and producing a harsh metallic friction sound. Furthermore, the drive system of traditional roller shutters often uses a direct rigid connection, and the vibration of the motor is transmitted to the entire door frame through the mechanical structure, causing resonance noise. This noise is particularly noticeable at night or in quiet environments, not only affecting the tranquility of the surrounding environment but also potentially causing door components to loosen due to vibration over time, shortening the lifespan of the door. Meanwhile, during rapid raising and lowering, some roller shutter doors, lacking effective buffering and stabilization mechanisms, are prone to swaying and impacts in the curtain slats, further increasing noise generation. These problems are particularly prominent in noise-sensitive locations such as hospitals, libraries, and office areas, necessitating a roller shutter door solution that systematically addresses noise issues through structural design. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention proposes a silent roller shutter door. This invention primarily addresses the problem that existing roller shutter doors suffer from uneven gaps between the curtain slats and the track, and most operate by pushing the curtain slats downwards within the track. This pushing force exacerbates the bending of the curtain and causes friction and collision with the track, further intensifying friction and producing a harsh metallic friction sound.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: This invention provides a silent roller shutter door, including a roller shutter, guide side strips, an upper positioning wheel, a lower positioning wheel, and a pull cord; the roller shutter slides on both sides within guide side strips symmetrically arranged on both sides; an upper positioning wheel is arranged above the guide side strips; the guide side strips are tangent to the upper positioning wheels; the roller shutter extends from the upper end of the guide side strips and passes around the upper positioning wheel; the upper positioning wheel rotates freely; a lower positioning wheel is arranged below the guide side strips; the lower positioning wheel is rotatably connected to the guide side strips via a first support plate; the guide side strips are tangent to the lower positioning wheel; the lower end of the roller shutter is fixedly connected to one end of the pull cord; the pull cord extends from the lower end of the guide side strips and passes around the lower positioning wheel; the lower positioning wheel rotates freely.

[0005] Preferably, the silent roller shutter door further includes a reversing wheel, a take-up and undo roller, a take-up motor, a pulley assembly, and a take-up and undo compensation component; the pull rope passes over the lower positioning wheel, then vertically upwards and passes over the reversing wheel; the reversing wheel is rotatably connected to the side wall of the upper end of the guide side strip via a second support plate; the pull rope passes over the reversing wheel and then winds counterclockwise around the spool of the take-up and undo roller, and the end of the pull rope is fixedly connected to the spool; the roller shutter passes over the upper positioning wheel and then winds clockwise around the curtain wheel of the take-up and undo roller, and the end of the roller shutter is fixedly connected to the curtain wheel; the take-up and undo roller is fixedly connected to a fixed plate connecting the two guide side strips via a support plate; the take-up motor is fixedly connected to the inside of the support plate via a third support plate; the take-up motor drives a rotating shaft rotatably connected between the two support plates via the pulley assembly; one of the take-up and undo rollers is fixedly connected to each end of the rotating shaft;

[0006] The retraction and expansion compensation component is used to support the upper positioning wheel; the retraction and expansion compensation component includes a rotating seat, a guide column, a mounting plate, and a spring; the upper positioning wheel is rotatably connected to one side of the rotating seat; the rotating seat is slidably connected to two vertically arranged guide columns; the lower end of the guide column is fixedly connected to the mounting plate; the mounting plate is fixedly connected to the support plate; the spring is sleeved on the guide column; the spring is disposed between the rotating seat and the mounting plate.

[0007] Preferably, a push plate is slidably connected to the guide post; the spring abuts between the rotating seat and the push plate; a threaded hole is provided on the mounting plate; a push rod is threadedly connected to the threaded hole; and the upper end of the push rod abuts against the lower surface of the push plate.

[0008] Preferably, a sliding gear is fixedly connected to the end of the push rod; a drive gear meshes with one side of the sliding gear; the drive gear is fixedly connected to the rotating shaft of the adjusting motor via an extended shaft; the adjusting motor is fixedly connected to the support plate; and a pressure sensor is provided between the lower end of the spring and the push plate.

[0009] Preferably, the roller blind is made by hinged narrow strips in sequence; a rubber strip is provided between the hinge surfaces of adjacent narrow strips; a sealing strip is provided on both sides of the roller blind; the sealing strip is fixedly connected to the roller blind; a damping component is provided at both ends of the guide side strip; the damping component presses inward against the sealing strips on both sides of the roller blind.

[0010] Preferably, the sealing strip is connected to the roller shutter through intermittent fixed connection points.

[0011] In a first preferred embodiment of intermittent fixed connection points, the sealing strip and the roller shutter are connected to intermittent fixed connection points via an inverted snap structure.

[0012] A second preferred embodiment of intermittent fixed connection points is that the sealing strip and the roller shutter are connected to intermittent fixed connection points by adhesive bonding.

[0013] A first preferred embodiment of the damping assembly includes a fourth support plate, a first compression wheel, and a belt; the fourth support plate is fixedly connected to the upper end of the guide side strip; the belts are symmetrically arranged on both sides of the fourth support plate; the belts are in compression contact with the sealing strip; the belts are vertically tightened by the two first compression wheels; the first compression wheels are rotatably connected to the fourth support plate via a rotating shaft, and a first damping rubber ring is fitted tightly and fixedly connected to the fourth support plate on the rotating shaft of the first compression wheel.

[0014] A second preferred embodiment of the damping assembly includes a fifth support plate and a second extrusion wheel; the fifth support plate is fixedly connected to the upper end of the guide side strip; the second extrusion wheels are symmetrically arranged on both sides of the fifth support plate at uniform intervals along the vertical direction; the second extrusion wheels are in extrusive contact with the sealing strip; the second extrusion wheels are rotatably connected to the fifth support plate via a rotating shaft, and a second damping rubber ring is fitted tightly and fixedly connected to the fifth support plate on the rotating shaft of the second extrusion wheel.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention uses a pull rope to move the roller shutter up and down along the guide rail track by passing it around a positioning wheel. The precise positioning of the upper and lower positioning wheels ensures that the roller shutter is on the center line of the guide rail, thereby reducing the chance of friction between the roller shutter and the guide rail during rolling up and down, thus preventing friction noise caused by hard contact. In this solution, the roller shutter is pulled by the pull rope and kept in a taut state. Because of the precise positioning of the upper and lower positioning wheels, the roller shutter does not rub against the guide rail when moving, thus achieving the purpose of quiet operation and improving the noise reduction effect of the roller shutter door.

[0017] 2. In this invention, the winding motor drives the rotating shaft to rotate via a pulley assembly. The winding and unwinding rollers at both ends of the rotating shaft rotate synchronously. While the curtain wheel winds up the blind clockwise, the pulley releases the drawstring counterclockwise, or vice versa, thus achieving the raising and lowering action of the blind. As the blind's thickness gradually increases during winding, it exerts a downward thrust on the rotating seat, pushing it down along the guide post and compressing the spring. The spring's elastic potential energy increases accordingly, and the spring's reaction force applies upward pressure to the rotating seat, ensuring that the upper positioning wheel remains in close contact with the blind, preventing slack or jamming caused by changes in the blind's winding radius. During unwinding, as the blind's thickness decreases, the spring gradually releases its elastic potential energy, pushing the rotating seat upward along the guide post, ensuring the upper positioning wheel remains in contact with the blind surface, maintaining a stable sliding trajectory of the blind in the guide strip, and further reducing frictional noise caused by positioning deviations. This retraction and expansion compensation mechanism effectively balances the tension changes during the retraction and expansion of the roller shutter through dynamic adjustment of the mechanical structure, providing a key guarantee for the stability of the silent effect.

[0018] 3. This invention uses a pressure sensor to monitor the pressure value of the spring on the push plate in real time and transmits the data to the control system. When the pressure value deviates from the preset range during the rolling or unrolling process of the roller blind, the control system drives the adjustment motor to operate, which in turn drives the drive gear to rotate via the extended shaft. The meshing action of the drive gear and the sliding gear causes the push rod to move axially along the threaded hole, thereby pushing the push plate to adjust the spring compression. For example, when the roller blind experiences slight thinning due to material aging after long-term use, the pressure sensor detects that the spring pressure is below the lower threshold. The control system immediately starts the adjustment motor to rotate clockwise, and the push rod moves upward to push the push plate to compress the spring until the pressure rises back to the set range. Conversely, if foreign matter adheres to the surface of the roller blind, causing a local increase in thickness, the pressure sensor reports that the pressure exceeds the limit. The adjustment motor rotates counterclockwise to move the push rod downward, reducing the spring tension to avoid excessive compression of the roller blind. This closed-loop feedback adjustment mechanism realizes automated dynamic calibration of the rolling and unrolling compensation components, adapting to changes in the physical characteristics of the roller blind and complex operating conditions in real time without manual intervention, significantly improving the accuracy and response speed of the silent control.

[0019] 4. In this invention, when the roller blind is pulled and needs to be rolled up, one end of the blind is pulled to overcome the frictional force of the damping component at the other end. Because the frictional resistance of the damping component is greater than the deformation resistance of the rubber strip, the roller blind increases in length by squeezing the rubber strips at each hinge. As the blind is stretched, the sealing strip on its surface is also stretched, reducing its thickness. This means that the sealing strip, which was in contact with the inner wall of the guide side strip when stationary, is no longer in contact with the inner wall of the guide side strip after being stretched, thus avoiding sliding friction between the sealing strip and the guide side strip when the blind moves. This further eliminates potential noise sources from a structural perspective. After the blind stops moving, the pulling force disappears, and the elastic restoring force of the rubber strip causes the blind to return to its original length. The sealing strip thickness rebounds and re-fits tightly against the inner wall of the guide side strip, ensuring that the sealing performance of the door is not affected. This composite design of "dynamic gap elimination - static sealing" cleverly balances the dual requirements of quiet operation and sealing protection. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the silent roller shutter door of the present invention;

[0022] Figure 2 This is a schematic diagram of the external structure of the silent roller shutter door of the present invention from a two-dimensional perspective;

[0023] Figure 3 This is a schematic diagram of the internal structure of the silent roller shutter door of the present invention from a two-dimensional perspective;

[0024] Figure 4 This is a schematic diagram of the external structure of the silent roller shutter door of the present invention from a three-dimensional perspective;

[0025] Figure 5 This is a schematic diagram of the internal structure of the silent roller shutter door of the present invention from a three-dimensional perspective;

[0026] Figure 6 This is a schematic diagram of the lower positioning wheel in this invention;

[0027] Figure 7 This is a schematic diagram of the structure of the retraction and expansion compensation component in this invention;

[0028] Figure 8 This is a schematic diagram of the external structure of the roller blind in this invention;

[0029] Figure 9 This is a schematic diagram of the internal structure of the roller blind in this invention;

[0030] Figure 10 This is a schematic diagram of the damping component in the first embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the damping component in the second embodiment of the present invention;

[0032] In the diagram: Roller blind 1, narrow strip 11, rubber strip 12, sealing strip 13, guide side strip 2, upper positioning wheel 3, lower positioning wheel 4, pull rope 5, reversing wheel 6, winding and unwinding roller 7, winding motor 71, pulley assembly 72, thread wheel 73, curtain wheel 74, support plate 75, winding and unwinding compensation component 8, rotating seat 81, guide column 82, mounting plate 83, spring 84, push plate 85, push rod 86, sliding gear 87, drive gear 88, extension shaft 881, adjusting motor 89, damping assembly 9, fourth support plate 91, first extrusion wheel 92, belt 93, fifth support plate 94, second extrusion wheel 95. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] like Figures 1 to 7 As shown, a silent roller shutter door includes a roller shutter 1, guide side strips 2, upper positioning wheels 3, lower positioning wheels 4, and a pull cord 5. The roller shutter 1 slides on both sides within the guide side strips 2, which are symmetrically arranged on both sides. The upper positioning wheel 3 is arranged above the guide side strips 2. The guide side strips 2 are tangent to the upper positioning wheels 3. The roller shutter 1 extends from the upper end of the guide side strips 2 and passes around the upper positioning wheels 3. The upper positioning wheels 3 rotate freely. The lower positioning wheel 4 is arranged below the guide side strips 2. The lower positioning wheel 4 is rotatably connected to the guide side strips 2 via a first support plate. The guide side strips 2 are tangent to the lower positioning wheels 4. The lower end of the roller shutter 1 is fixedly connected to one end of the pull cord 5. The pull cord 5 extends from the lower end of the guide side strips 2 and passes around the lower positioning wheels 4. The lower positioning wheels 4 rotate freely.

[0035] During operation, the pull cord 5 passes around the positioning wheel, causing the roller shutter 1 to move up and down along the guide side strip 2. The precise positioning of the upper positioning wheel 3 and the lower positioning wheel 4 ensures that the roller shutter 1 is on the center line of the guide side strip 2, thereby reducing the chance of friction between the roller shutter 1 and the guide side strip 2 during the rolling and unrolling process, thus preventing friction noise caused by hard contact. In this solution, the roller shutter 1 is pulled by the pull cord 5 and is in a taut state. Because of the precise positioning of the upper positioning wheel 3 and the lower positioning wheel 4, the roller shutter 1 does not rub against the guide side strip 2 when moving, thus achieving the purpose of quietness and improving the noise reduction effect of the roller shutter door.

[0036] like Figures 1 to 7As shown, the silent roller shutter door also includes a reversing wheel 6, a take-up and undo roller 7, a take-up motor 71, a pulley assembly 72, and a take-up and undo compensation component 8; the pull rope 5 passes over the lower positioning wheel 4, then vertically upwards and passes over the reversing wheel 6; the reversing wheel 6 is rotatably connected to the side wall at the upper end of the guide side strip 2 via a second support plate; the pull rope 5 passes over the reversing wheel 6 and then winds counterclockwise around the spool 73 of the take-up and undo roller 7, and the end of the pull rope 5 is fixedly connected to the spool 73; the roller shutter 1 passes over the upper positioning wheel The rear edge of the roller blind 1 is wound clockwise around the curtain wheel 74 of the take-up and release roller 7, and the end of the roller blind 1 is fixedly connected to the curtain wheel 74; the take-up and release roller 7 is fixedly connected to the fixing plate connecting the two guide side strips 2 through the support plate 75; the take-up motor 71 is fixedly connected to the inner side of the support plate 75 through the third support plate; the take-up motor 71 is driven by the pulley assembly 72 to rotate the rotating shaft connected between the two support plates 75; one of the take-up and release rollers 7 is fixedly connected to each end of the rotating shaft;

[0037] The retraction and expansion compensation component 8 is used to support the upper positioning wheel 3; the retraction and expansion compensation component 8 includes a rotating seat 81, a guide post 82, a mounting plate 83, and a spring 84; the upper positioning wheel 3 is rotatably connected to one side of the rotating seat 81; the rotating seat 81 is slidably connected to two vertically arranged guide posts 82; the lower end of the guide post 82 is fixedly connected to the mounting plate 83; the mounting plate 83 is fixedly connected to the support plate 75; the spring 84 is sleeved on the guide post 82; the spring 84 is disposed between the rotating seat 81 and the mounting plate 83.

[0038] During operation, the winding motor 71 drives the rotating shaft to rotate via the pulley assembly 72. The winding and unwinding rollers 7 at both ends of the rotating shaft rotate synchronously. While the curtain wheel 74 winds up the roller blind 1 clockwise, the pull cord 73 releases the pull rope 5 counterclockwise, or while the curtain wheel 74 releases the roller blind 1 counterclockwise, the pull cord 73 winds up the pull rope 5 clockwise, thus realizing the raising and lowering action of the roller blind 1. As the thickness of the roller blind 1 gradually increases during the winding process, the roller blind 1 generates a downward thrust on the rotating seat 81, pushing the rotating seat 81 to slide downward along the guide post 82 and compress the spring 84. The elastic potential energy of the spring 84 increases accordingly, and the reaction force of the spring 84 applies upward pressure to the rotating seat 81, ensuring that the upper positioning wheel 3 always maintains close contact with the roller blind 1, avoiding slack or jamming caused by changes in the winding radius of the roller blind 1. During the unrolling process of the roller blind 1, as the thickness of the roller blind 1 decreases, the spring 84 gradually releases its elastic potential energy, pushing the rotating seat 81 to move upward along the guide column 82. This ensures that the upper positioning wheel 3 remains in contact with the surface of the roller blind 1, maintaining a stable sliding trajectory of the roller blind 1 in the guide side strip 2, and further reducing frictional noise caused by positioning deviation. This roll-up and roll-down compensation mechanism effectively balances the tension changes during the roll-up and roll-down process through dynamic adjustment of the mechanical structure, providing a key guarantee for the stability of the silent effect.

[0039] like Figure 3 and Figure 7 As shown, a push plate 85 is slidably connected to the guide post 82; the spring 84 abuts between the rotating seat 81 and the push plate 85; a threaded hole is provided on the mounting plate 83; a push rod 86 is threadedly connected to the threaded hole; the upper end of the push rod 86 abuts against the lower surface of the push plate 85.

[0040] During operation, the height of the push rod 86 within the threaded hole can be adjusted by rotating it, thereby pushing the push plate 85 up and down along the guide post 82, changing the initial compression of the spring 84. When it is necessary to increase the clamping force of the upper positioning wheel 3 on the roller shutter 1, rotating the push rod 86 clockwise causes the push plate 85 to move upward, further compressing the spring 84, increasing its initial elastic potential energy, and consequently increasing the upward support force on the rotating seat 81. This adjustable structure allows the retraction compensation component 8 to adapt to roller shutters 1 of different materials and thicknesses. By precisely controlling the preload of the spring 84, it ensures that the fit between the upper positioning wheel 3 and the roller shutter 1 is always in the optimal state under various working conditions, effectively avoiding surface wear of the roller shutter 1 due to excessive spring force or positioning failure caused by insufficient spring force. Thus, while ensuring a quiet operation, it extends the overall service life of the roller shutter door. Secondly, during the installation of the roller shutter 1, the initial position of the retraction compensation component 8 can be quickly calibrated by adjusting the height of the push rod 86, reducing the risk of positioning deviation caused by installation errors and improving the convenience of equipment assembly and the level of precision control.

[0041] like Figure 3 and Figure 7As shown, a sliding gear 87 is fixedly connected to the end of the push rod 86; a drive gear 88 is meshed on one side of the sliding gear 87; the drive gear 88 is fixedly connected to the rotating shaft of the adjusting motor 89 through an extension shaft 881; the adjusting motor 89 is fixedly connected to the support plate 75; a pressure sensor is provided between the lower end of the spring 84 and the push plate 85.

[0042] During operation, the pressure sensor monitors the pressure value of spring 84 against push plate 85 in real time and transmits the data to the control system. When the pressure value deviates from the preset range during the rolling or unrolling process of the roller blind 1, the control system drives the adjusting motor 89 to operate, which in turn drives the drive gear 88 to rotate via the extended shaft 881. The meshing action of the drive gear 88 and the sliding gear 87 causes the push rod 86 to move axially along the threaded hole, thereby pushing the push plate 85 to adjust the compression of spring 84. For example, when the roller blind 1 experiences slight thinning due to material aging after long-term use, the pressure sensor detects that the pressure of spring 84 is below the lower threshold. The control system immediately starts the adjusting motor 89 to rotate clockwise, and the push rod 86 moves upward to push the push plate 85 to compress spring 84 until the pressure rises back to the set range. Conversely, if foreign matter adheres to the surface of the roller blind 1, causing a local increase in thickness, the pressure sensor reports that the pressure exceeds the limit. The adjusting motor 89 rotates counterclockwise to move the push rod 86 downward, reducing the tension of spring 84 to avoid excessive compression of the roller blind 1. This closed-loop feedback adjustment mechanism enables automated dynamic calibration of the retraction compensation component 8, allowing it to adapt to changes in the physical characteristics of the roller shutter 1 and complex operating conditions in real time without manual intervention, significantly improving the accuracy and response speed of silent control. Simultaneously, the continuous monitoring data from the pressure sensor can serve as a basis for equipment health diagnosis. By analyzing the pressure change curve, it can provide early warnings of potential faults such as spring 84 fatigue and roller shutter 1 wear, providing data support for maintenance and further enhancing the reliability and intelligence of the silent roller shutter door operation.

[0043] like Figure 8 and Figure 9 As shown, the roller blind 1 is made by hinged narrow strips 11 in sequence; a rubber strip 12 is provided between the hinge surfaces of adjacent narrow strips 11; a sealing strip 13 is provided on both sides of the roller blind 1; the sealing strip 13 is fixedly connected to the roller blind 1; a damping component 9 is provided at both ends of the guide side strip 2; the damping component 9 presses the sealing strips 13 on both sides of the roller blind 1 inward.

[0044] During operation, when the roller blind 1 is pulled and needs to be rolled up, one end of the roller blind 1 is pulled and needs to overcome the frictional force of the damping component 9 at the other end. Because the frictional resistance of the damping component 9 is greater than the deformation resistance of the rubber strip 12, the roller blind 1 increases in length by compressing the rubber strip 12 at each hinge. As the roller blind 1 is stretched, the sealing strip 13 on its surface is also stretched, resulting in a decrease in the thickness of the sealing strip 13. Consequently, the sealing strip 13, which was in contact with the inner wall of the guide side strip 2 when stationary, is stretched and no longer contacts the inner wall of the guide side strip 2. This avoids sliding friction between the sealing strip 13 and the guide side strip 2 when the roller blind 1 moves, further eliminating potential noise sources from a structural perspective. After the roller blind 1 stops moving, the pulling force disappears, and the elastic restoring force of the rubber strip 12 causes the roller blind 1 to return to its original length. The thickness of the sealing strip 13 rebounds and re-fits tightly against the inner wall of the guide side strip 2, ensuring that the sealing performance of the door is not affected. This composite design of "dynamic gap elimination and static sealing" cleverly balances the dual requirements of quiet operation and sealing protection. In addition, the damping component 9 can effectively remove dust particles attached to the surface of the roller shutter 1 by continuously squeezing the sealing strip 13, reducing the probability of foreign objects entering the guide side strip 2 track, reducing the risk of friction noise caused by impurities, and at the same time slowing down the aging rate of the sealing strip 13, indirectly improving the maintenance cycle and operational stability of the roller shutter door.

[0045] like Figure 8 and Figure 9 As shown, Figure 8 and Figure 9 As shown, the sealing strip 13 is connected to the roller shutter 1 through intermittent fixed connection points.

[0046] The fixed connection points are evenly distributed along the length of the roller blind 1. The sealing strips 13 between adjacent connection points are in a non-fixed free state. Therefore, when the roller blind 1 pulls the sealing strips 13, all the non-fixed free sealing strips 13 can be stretched, resulting in a more uniform stretching of the sealing strips 13. The increased length of the stretched and thinned sealing strips 13 reduces the contact area between the sealing strips 13 and the inner wall of the guide side strip 2, thus reducing the probability of friction between them. For example, when the length of the roller blind 1 is 2 meters and the fixed connection point spacing is set to 20 centimeters, each sealing strip 13 will form 9 non-fixed free segments. Compared to a completely fixed sealing strip 13, its deformation uniformity during stretching is improved by about 40%, and the contact area with the inner wall of the guide side strip 2 can be reduced to less than 30% of the original. This segmented fixing structure also avoids material fatigue fracture of the sealing strips 13 due to localized excessive stretching. By dispersing deformation stress, the elastic recovery rate of the sealing strips 13 remains above 85% during long-term use, significantly extending the replacement cycle of vulnerable parts. Meanwhile, the presence of the non-fixed section allows the sealing strip 13 to naturally shrink and fit the curtain surface when the roller blind 1 is rolled up, avoiding the wrinkles or stacking phenomenon generated by the traditional integral fixed sealing strip 13 during the winding process, further reducing the friction noise between the internal structures when the roller blind 1 is rolled up, and providing structural support for the comprehensive optimization of the silent performance.

[0047] like Figure 8 and Figure 9 As shown, in the first embodiment of the intermittent fixed connection point, the sealing strip 13 and the roller shutter 1 are connected to the intermittent fixed connection point through an inverted buckle structure.

[0048] The inverted snap-fit ​​structure includes a T-shaped clip located inside the sealing strip 13 and an inverted trapezoidal groove formed on the surface of the narrow strip 11 of the roller shutter 1 (the opposite is true on the other side of the roller shutter 1). The diameter of the transverse section of the T-shaped clip is larger than the opening width of the inverted trapezoidal groove, and the longitudinal section of the T-shaped clip is clearance-fitted with the inner wall of the inverted trapezoidal groove. During installation, pressure is applied by aligning the T-shaped clip of the sealing strip 13 with the opening of the inverted trapezoidal groove. The transverse section of the T-shaped clip is squeezed into the groove through elastic deformation. Axial limiting is achieved by utilizing the upper-wide and lower-narrow structural feature of the inverted trapezoidal groove. At the same time, the clearance fit between the longitudinal section of the T-shaped clip and the inner wall of the groove allows the sealing strip 13 to generate a slight displacement along its length when stretched. The spacing of the inverted snap-fit ​​structure is consistent with the length of the non-fixed free section of the sealing strip 13, ensuring that the tensile deformation of each free section is evenly distributed, thereby maintaining the overall dynamic sealing performance of the sealing strip 13.

[0049] In a second embodiment of intermittent fixed connection points, the sealing strip 13 and the roller shutter 1 are connected to intermittent fixed connection points by adhesive bonding.

[0050] The adhesive bonding uses modified acrylic structural adhesive, which is applied via a dispensing process to form circular adhesive dots with a diameter of 5-8 mm at pre-defined fixed connection points. The adhesive layer thickness is controlled at 0.3-0.5 mm. Before applying the adhesive, the surface of the narrow strip 11 of the roller shutter 1 is sandblasted to remove the 0.5-1 μm oxide layer and form a surface roughness of Ra1.6-Ra3.2. Simultaneously, the bonding surface of the sealing strip 13 is plasma activated to increase the surface energy to above 45 mN / m. After the adhesive cures, a connection node with a shear strength ≥15 MPa and a peel strength ≥5 N / mm is formed. Its elastic modulus matches the deformation requirements of the sealing strip 13, allowing an elastic displacement of no more than 0.2 mm at the adhesive dot when the roller shutter 1 is stretched, thus avoiding stress concentration caused by rigid connection. This bonding method allows for the precise placement of 12-15 fixed points per square meter of roller blind 1, with the spacing error between adjacent adhesive points controlled within ±0.5mm. Through the chemical stability and mechanical strength of the adhesive layer, the durability of the connection nodes is ensured within the working temperature range of -30℃ to 70℃. At the same time, the damping characteristics of the adhesive itself can absorb some vibration energy, further reducing the frictional noise between the sealing strip 13 and the roller blind 1.

[0051] like Figure 10 As shown, in a first embodiment of the damping assembly, the damping assembly 9 includes a fourth support plate 91, a first compression wheel 92, and a belt 93; the fourth support plate 91 is fixedly connected to the upper end of the guide side strip 2; the belts 93 are symmetrically arranged on both sides of the fourth support plate 91; the belts 93 are in compression contact with the sealing strip 13; the belts 93 are vertically tightened by the two first compression wheels 92; the first compression wheels 92 are rotatably connected to the fourth support plate 91 via a rotating shaft, and a first damping rubber ring is fitted tightly and fixedly connected to the fourth support plate 91 on the rotating shaft of the first compression wheel 92.

[0052] During operation, as the roller blind 1 moves up and down within the guide side strip 2, the sealing strips 13 on both sides of it come into surface contact with the belt 93 of the damping assembly 9. The belt 93 remains taut under the support of the first compression wheel 92, while the first damping rubber ring on the shaft of the first compression wheel 92 generates constant friction through its tight fit with the fourth support plate 91. This friction is transmitted through the belt 93 to the surface of the sealing strip 13, forming a damping force that hinders the movement of the roller blind 1. Consequently, as the roller blind 1 is stretched, the sealing strip 13 on its surface is also stretched. This means that the sealing strip 13, which was in contact with the inner wall of the guide side strip 2 in a stationary state, is stretched and no longer contacts the inner wall of the guide side strip 2, thus avoiding sliding friction between the sealing strip 13 and the guide side strip 2 when the roller blind 1 moves. This further eliminates potential noise sources from a structural perspective.

[0053] like Figure 11As shown, in a second embodiment of the damping assembly, the damping assembly 9 includes a fifth support plate 94 and a second extrusion wheel 95; the fifth support plate 94 is fixedly connected to the upper end of the guide side strip 2; the second extrusion wheels 95 are symmetrically arranged on both sides of the fifth support plate 94 at uniform intervals along the vertical direction; the second extrusion wheels 95 are in extrusive contact with the sealing strip 13; the second extrusion wheels 95 are rotatably connected to the fifth support plate 94 via a rotating shaft, and a second damping rubber ring is fitted tightly and fixedly connected to the fifth support plate 94 on the rotating shaft of the second extrusion wheel 95.

[0054] During operation, when the roller shutter 1 moves the sealing strip 13 up and down, the second extrusion wheel 95 forms line contact with the sealing strip 13 through its outer circumferential surface, extruding pressure. Compared to the surface contact of the belt 93, the multi-point distributed second extrusion wheel 95 can transmit damping force more evenly. The second damping rubber ring is made of nitrile rubber with a Shore hardness of 65-70A. It is fitted onto the rotating shaft of the second extrusion wheel 95 with an interference fit, forming stable frictional damping with the metal hole wall of the fifth support plate 94. When the roller shutter 1 moves, the second extrusion wheel 95 rotates with the movement of the sealing strip 13. The relative friction between the rotating shaft and the second damping rubber ring provides the basic damping force. Its damping coefficient can be precisely adjusted by adjusting the interference of the rubber ring (controlled within the range of 0.15-0.2mm). The second extrusion rollers 95, evenly arranged vertically (with adjacent spacing of 8-10cm), provide multi-point support for the sealing strip 13, preventing lateral displacement of the long strip sealing strip 13 during stretching and ensuring it always moves along the preset trajectory of the guide side strip 2. This further reduces noise caused by the sealing strip 13 swaying and colliding with the inner wall of the side strip. The single-roller pressure of this multi-roller damping structure can be controlled at 3-5N. Through distributed pressure design, while ensuring the damping effect, it significantly reduces the local pressure on the surface of the sealing strip 13, effectively slowing down the wear rate of the sealing strip 13 and providing structural protection for long-term silent operation.

[0055] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A silent roller shutter door, characterized in that: The roller blind (1) includes a guide side strip (2), an upper positioning wheel (3), a lower positioning wheel (4), and a pull cord (5). The roller blind (1) slides on both sides within the guide side strips (2) symmetrically arranged on both sides. An upper positioning wheel (3) is arranged above the guide side strips (2). The guide side strips (2) are tangent to the upper positioning wheel (3). The roller blind (1) extends from the upper end of the guide side strips (2) and passes around the upper positioning wheel (3). The upper positioning wheel (3) rotates freely. A lower positioning wheel (4) is arranged below the guide side strips (2). The lower positioning wheel (4) is rotatably connected to the guide side strips (2) via a first support plate. The guide side strips (2) are tangent to the lower positioning wheel (4). The lower end of the roller blind (1) is fixedly connected to one end of the pull cord (5). The pull cord (5) extends from the lower end of the guide side strips (2) and passes around the lower positioning wheel (4). The lower positioning wheel (4) rotates freely. The silent roller shutter door also includes a reversing wheel (6), a winding and unwinding roller (7), a winding motor (71), a pulley assembly (72), and a winding and unwinding compensation component (8); the pull rope (5) passes over the lower positioning wheel (4) and then vertically upwards and passes over the reversing wheel (6); the reversing wheel (6) is rotatably connected to the side wall of the upper end of the guide side strip (2) through a second support plate; the pull rope (5) passes over the reversing wheel (6) and then winds counterclockwise around the spool (73) of the winding and unwinding roller (7), and the end of the pull rope (5) is fixedly connected to the spool (73); the roller shutter (1) passes over the upper positioning wheel (72) and then winds counterclockwise around the upper positioning wheel (73). The rear edge of the roller (3) is wound clockwise around the curtain wheel (74) of the take-up and release roller (7), and the end of the roller blind (1) is fixedly connected to the curtain wheel (74); the take-up and release roller (7) is fixedly connected to the fixing plate connecting the two guide side strips (2) through the support plate (75); the take-up motor (71) is fixedly connected to the inner side of the support plate (75) through the third support plate; the take-up motor (71) drives the rotating shaft rotatably connected between the two support plates (75) through the pulley assembly (72); one of the take-up and release rollers (7) is fixedly connected to each end of the rotating shaft; The retraction compensation component (8) is used to support the upper positioning wheel (3); the retraction compensation component (8) includes a rotating seat (81), a guide column (82), a mounting plate (83), and a spring (84); the upper positioning wheel (3) is rotatably connected to one side of the rotating seat (81); the rotating seat (81) is slidably connected to two vertically arranged guide columns (82); the lower end of the guide column (82) is fixedly connected to the mounting plate (83); the mounting plate (83) is fixedly connected to the support plate (75); the spring (84) is sleeved on the guide column (82); the spring (84) is disposed between the rotating seat (81) and the mounting plate (83); A push plate (85) is slidably connected to the guide post (82); the spring (84) abuts between the rotating seat (81) and the push plate (85); a threaded hole is provided on the mounting plate (83); a push rod (86) is threadedly connected to the threaded hole; the upper end of the push rod (86) abuts against the lower surface of the push plate (85); The end of the push rod (86) is fixedly connected to a sliding gear (87); one side of the sliding gear (87) meshes with a drive gear (88); the drive gear (88) is fixedly connected to the shaft of the adjusting motor (89) via an extension shaft (881); the adjusting motor (89) is fixedly connected to the support plate (75); a pressure sensor is provided between the lower end of the spring (84) and the push plate (85).

2. A silent roller shutter door according to claim 1, characterized in that: The roller blind (1) is made by hinged narrow strips (11) in sequence; a rubber strip (12) is provided between the hinge surfaces of adjacent narrow strips (11); a sealing strip (13) is provided on both sides of the roller blind (1); the sealing strip (13) is fixedly connected to the roller blind (1); a damping component (9) is provided at both ends of the guide side strip (2); the damping component (9) presses the sealing strip (13) on both sides of the roller blind (1) inward.

3. A silent roller shutter door according to claim 2, characterized in that: The sealing strip (13) is connected to the roller shutter (1) through intermittent fixed connection points.

4. A silent roller shutter door according to claim 3, characterized in that: The sealing strip (13) and the roller shutter (1) are connected at intermittent fixed connection points through an inverted buckle structure.

5. A silent roller shutter door according to claim 3, characterized in that: The sealing strip (13) and the roller shutter (1) are connected to an intermittent fixed connection point by adhesive bonding.

6. A silent roller shutter door according to claim 2, characterized in that: The damping assembly (9) includes a fourth support plate (91), a first extrusion wheel (92), and a belt (93); the fourth support plate (91) is fixedly connected to the upper end of the guide side strip (2); the belt (93) is symmetrically arranged on both sides of the fourth support plate (91); the belt (93) is in extrusion contact with the sealing strip (13); the belt (93) is vertically tightened by the two first extrusion wheels (92); the first extrusion wheel (92) is rotatably connected to the fourth support plate (91) through a rotating shaft, and a first damping rubber ring is fitted tightly and fixedly connected to the fourth support plate (91) on the rotating shaft of the first extrusion wheel (92).

7. A silent roller shutter door according to claim 2, characterized in that: The damping assembly (9) includes a fifth support plate (94) and a second extrusion wheel (95); the fifth support plate (94) is fixedly connected to the upper end of the guide side strip (2); the second extrusion wheels (95) are symmetrically arranged on both sides of the fifth support plate (94) and evenly spaced vertically; the second extrusion wheels (95) are in extrusion contact with the sealing strip (13); the second extrusion wheels (95) are rotatably connected to the fifth support plate (94) through a rotating shaft, and a second damping rubber ring is fitted tightly and fixedly connected to the fifth support plate (94) on the rotating shaft of the second extrusion wheel (95).

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