Mute roller shutter door

Abstract

The invention belongs to the technical field of roller shutter doors, and particularly relates to a mute roller shutter door which comprises a roller shutter, guide side strips, an upper positioning wheel, a lower positioning wheel and a pull rope. An upper positioning wheel is arranged above the guide side strip; a lower positioning wheel is arranged below the guide side strip; the lower end of the roller shutter is fixedly connected with one end of the pull rope; the pull rope extends out of the lower end of the guide side strip and bypasses the lower positioning wheel; the pull rope bypasses the positioning wheels to drive the roller shutter to move up and down along the rails of the guide side strips, the roller shutter is located on the center lines of the guide side strips through accurate positioning of the upper positioning wheels and the lower positioning wheels, and then the friction probability between the roller shutter and the guide side strips in the rolling and unrolling process is reduced; therefore, friction noise generated by hard contact is prevented. According to the scheme, the roller shutter is pulled by the pull rope and is in a straightened state, and due to accurate positioning of the upper positioning wheel and the lower positioning wheel, the roller shutter does not rub with the guide side strip when moving in the guide side strip, and the purpose of muting is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of rolling shutter doors, in particular to a silent rolling shutter door. Background Art

[0002] In daily use, the operating noise problem of traditional rolling shutter doors has always been an important factor affecting the user experience. The structural design of conventional rolling shutter doors often focuses on the realization of basic switching functions, and the optimization of silent performance is insufficient. During the rolling and unrolling process of the rolling shutter, the collision between the curtain blades and the friction between the curtain blades and the guide track are the main sources of noise. Especially when the rolling shutter door is large in size or has been used for a long time, the curtain blades sag due to their own weight or the track undergoes slight deformation, which will cause the gap between the curtain blades and the track to be uneven, further aggravating the friction and producing a harsh metal friction sound. In addition, the drive system of traditional rolling shutter doors mostly adopts a direct rigid connection method. The vibration of the motor during operation will be transmitted to the entire door frame through the mechanical structure, causing resonant noise. This noise is particularly noticeable at night or in quiet environments. It not only affects the quietness of the surrounding environment, but long-term use may also cause the door components to loosen due to vibration, shortening the service life. At the same time, due to the lack of effective buffering and stabilization mechanisms, some rolling shutter doors are prone to shaking and colliding during rapid raising and lowering, further increasing the noise generation. These problems are particularly prominent in noise-sensitive places such as hospitals, libraries, and office areas. There is an urgent need for a rolling shutter door solution that can systematically solve the noise problem through structural design. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention proposes a silent rolling shutter door. This invention primarily addresses the problem of existing rolling shutter doors, where the gap between the curtain slats and the track is uneven, and most use a method of pushing the curtain slats downward from the top to move them within the track. This pushing force exacerbates the bending of the curtain door, causing friction and collision with the track, further increasing friction with the track, and thus producing a harsh metallic friction sound.

[0004] The technical solution adopted by the present invention to solve its technical problems is: the present invention provides a silent rolling shutter door, including a rolling shutter, a guide side strip, an upper positioning wheel, a lower positioning wheel and a pull rope; the two sides of the rolling shutter slide in the guide side strips symmetrically arranged on both sides; an upper positioning wheel is arranged above the guide side strip; the guide side strip is tangent to the upper positioning wheel; the rolling shutter extends from the upper end of the guide side strip and then passes around the upper positioning wheel; the upper positioning wheel rotates freely; a lower positioning wheel is arranged below the guide side strip; the lower positioning wheel is rotatably connected to the guide side strip through a first support plate; the guide side strip is tangent to the lower positioning wheel; the lower end of the rolling shutter is fixedly connected to one end of the pull rope; the pull rope extends from the lower end of the guide side strip and then passes around the lower positioning wheel; the lower positioning wheel rotates freely.

[0005] The wheel assembly is connected to the guide rail, and the guide rail is connected to the upper end of the guide rail by a fixing mechanism, and the fixing mechanism can be turned by the fixing mechanism, and the fixing mechanism can be turned by the fixing mechanism. The retractable and extendable compensation component is used to support the upper positioning wheel; the retractable and extendable 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 arranged between the rotating seat and the mounting plate.

[0006] Preferably, the guide column is slidably connected to the push plate; the spring is in contact between the rotating seat and the push plate; a threaded hole is provided on the mounting plate; the threaded hole is threadedly connected to the push rod; the upper end of the push rod is in contact with the lower surface of the push plate.

[0007] Preferably, the end of the push rod is fixedly connected to the sliding gear; one side of the sliding gear is engaged with the driving gear; the driving gear is fixedly connected to the rotating shaft of the adjusting motor through an extension shaft; the adjusting motor is fixedly connected to the support plate; a pressure sensor is arranged between the lower end of the spring and the push plate.

[0008] Preferably, the rolling curtain is made of narrow strips hinged in sequence; rubber strips are arranged between the hinged surfaces of adjacent narrow strips; sealing strips are arranged on both side surfaces of the rolling curtain; the sealing strips are fixedly connected to the rolling curtain; damping components are arranged at both ends of the guide side strips; the damping components squeeze the sealing strips on both sides of the rolling curtain inward.

[0009] Preferably, the sealing strip is connected to the roller blind via intermittent fixed connection points.

[0010] In a first preferred embodiment of the intermittent fixed connection point, the sealing strip and the roller blind are connected at an intermittent fixed connection point via an inverted structure.

[0011] In a second preferred embodiment of the intermittent fixed connection point, the sealing strip and the roller blind are connected at the intermittent fixed connection point by adhesive bonding.

[0012] A first preferred embodiment of the damping assembly comprises a fourth support plate, a first extrusion 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 extrusion contact with the sealing strip; the belts are vertically tightened by the two first extrusion wheels; the first extrusion wheel is rotatably connected to the fourth support plate via a rotating shaft, and a first damping rubber ring is tightly fitted and fixedly connected to the fourth support plate on the rotating shaft of the first extrusion wheel.

[0013] The second preferred embodiment of the damping assembly comprises 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 and are evenly spaced vertically; the second extrusion wheels are in extrusion contact with the sealing strip; the second extrusion wheel is rotatably connected to the fifth support plate via a rotating shaft, and a second damping rubber ring is tightly fitted and fixedly connected to the fifth support plate on the rotating shaft of the second extrusion wheel.

[0014] The beneficial effects of the present invention are as follows: 1. This invention uses a pull cord that passes around a positioning wheel to drive the rolling curtain up and down along the track of the guide side strips. The precise positioning of the upper and lower positioning wheels ensures that the rolling curtain is aligned with the centerline of the guide side strips, thereby reducing the chance of friction between the rolling curtain and the guide side strips during winding and unwinding, thereby preventing friction noise caused by hard contact. In this solution, the rolling curtain is pulled by the pull cord and kept in a straight position. The precise positioning of the upper and lower positioning wheels prevents the rolling curtain from rubbing against the guide side strips as it moves, achieving a silent operation and enhancing the quietness of the rolling shutter door.

[0015] 2. In the present invention, the winding motor drives the rotating shaft to rotate through the pulley assembly, and the reeling wheels at both ends of the rotating shaft rotate synchronously. While the curtain wheel reels the curtain clockwise, the line wheel releases the pull rope counterclockwise, or while the curtain wheel releases the curtain counterclockwise, the line wheel reels the pull rope clockwise, thereby realizing the lifting and lowering action of the curtain. When the thickness of the curtain gradually increases during the winding process, the curtain generates a downward thrust on the rotating seat, pushing the rotating seat to slide downward along the guide column and compressing the spring. The elastic potential energy of the spring increases accordingly, and the reaction force of the spring applies upward pressure to the rotating seat, ensuring that the upper positioning wheel always maintains close contact with the curtain, avoiding loosening or jamming caused by changes in the curtain winding radius. During the unwinding process of the curtain, as the thickness of the curtain decreases, the spring gradually releases its elastic potential energy, pushing the rotating seat to move upward along the guide column, so that the upper positioning wheel continues to fit the surface of the curtain, maintaining a stable sliding trajectory of the curtain in the guide side strip, and further reducing the friction noise caused by positioning deviation. This retraction and extension compensation mechanism effectively balances the tension changes during the retraction and extension of the roller blind through dynamic adjustment of the mechanical structure, providing a key guarantee for the stability of the silent effect.

[0016] 3. The present 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 winding or unwinding of the roller blind, the control system drives the adjustment motor to operate, which drives the drive gear to rotate through 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 has aged due to long-term use and its thickness has slightly thinned, the pressure sensor detects that the spring pressure is lower than the lower limit 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 returns to the set range. Conversely, if foreign matter adheres to the surface of the roller blind, causing the local thickness to increase, the pressure sensor feedback pressure exceeds the limit, and 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 the automatic dynamic calibration of the retraction and unwinding compensation components, and can adapt to the changes in the physical properties and complex working conditions of the roller blind in real time without human intervention, significantly improving the accuracy and response speed of silent control.

[0017] 4. In the present invention, when the roller blind is subjected to tension and needs to be reeled in, one end of the roller blind is pulled to overcome the friction of the damping assembly at the other end. Since the friction resistance of the damping assembly 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 roller blind is stretched, the sealing strip on its surface is also stretched, which reduces the thickness of the sealing strip. As a result, the sealing strip that is in contact with the inner wall of the guide side strip in the static state is stretched and no longer contacts the inner wall of the guide side strip. This avoids sliding friction between the sealing strip and the guide side strip when the roller blind moves, further eliminating potential noise sources from a structural level. After the roller blind stops moving, the tension disappears, and the elastic recovery force of the rubber strip drives the roller blind to return to its original length. The thickness of the sealing strip rebounds and fits tightly with the inner wall of the guide side strip again, ensuring that the sealing performance of the door body is not affected. This "dynamic gap elimination-static sealing" composite design cleverly balances the dual needs of silent operation and sealing protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the silent rolling shutter door of the present invention; Figure 2 Schematic diagram of the external structure of the silent rolling shutter door of the present invention in a two-dimensional perspective; Figure 3 Schematic diagram of the internal structure of the silent rolling shutter door of the present invention in a two-dimensional perspective; Figure 4 Schematic diagram of the external structure of the silent rolling shutter door of the present invention in a three-dimensional perspective; Figure 5 Schematic diagram of the internal structure of the silent rolling shutter door of the present invention in a three-dimensional perspective; Figure 6 It is a structural schematic diagram of the lower positioning wheel in the present invention; Figure 7 It is a structural diagram of the retractable compensation component in the present invention; Figure 8 Schematic diagram of the external structure of the roller blind in the present invention; Figure 9 It is a schematic diagram of the internal structure of the roller blind in the present invention; Figure 10 is a schematic structural diagram of the damping assembly in the first embodiment of the present invention; Figure 11 is a schematic structural diagram of the damping assembly in the second embodiment of the present invention; In the figure: 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, retracting and unwinding wheel 7, rewinding motor 71, pulley assembly 72, line wheel 73, curtain wheel 74, support plate 75, retracting 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 DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figures 1 to 7 As shown, a silent rolling shutter door comprises a rolling shutter 1, a guide side strip 2, an upper positioning wheel 3, a lower positioning wheel 4 and a pull rope 5; the two sides of the rolling shutter 1 slide in 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 rolling shutter 1 extends from the upper end of the guide side strips 2 and then 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 through a first support plate; the guide side strips 2 are tangent to the lower positioning wheel 4; the lower end of the rolling shutter 1 is fixedly connected to one end of the pull rope 5; the pull rope 5 extends from the lower end of the guide side strips 2 and then passes around the lower positioning wheel 4; the lower positioning wheel 4 rotates freely.

[0022] During operation, the pull cord 5 passes around the positioning wheel, thereby driving the rolling curtain 1 up and down along the track of the guide side strip 2. The precise positioning of the upper and lower positioning wheels 3 and 4 ensures that the rolling curtain 1 is aligned with the centerline of the guide side strip 2, thereby reducing the probability of friction between the rolling curtain 1 and the guide side strip 2 during the winding and unwinding process, thereby preventing friction noise caused by hard contact. In this solution, the rolling curtain 1 is pulled by the pull cord 5 and is in a straight state. The precise positioning of the upper and lower positioning wheels 3 and 4 ensures that the rolling curtain 1 does not rub against the guide side strip 2 when moving within the guide side strip, thereby achieving a silent operation and improving the quietness of the rolling shutter door.

[0023] like Figures 1 to 7As shown, the silent rolling shutter door also includes a reversing wheel 6, a retracting and unreeling wheel 7, a reeling motor 71, a pulley assembly 72 and a retracting and unreeling compensation component 8; the pull rope 5 passes around the lower positioning wheel 4 and then passes around the reversing wheel 6 vertically upward; the reversing wheel 6 is rotatably connected to the side wall of the upper end of the guide side strip 2 through the second support plate; the pull rope 5 passes around the reversing wheel 6 and then passes counterclockwise around the wire wheel 73 of the retracting and unreeling wheel 7, and the end of the pull rope 5 is fixedly connected to the wire wheel 73; the roller shutter 1 passes around the upper positioning wheel 3 is wound clockwise along the rear edge around the curtain wheel 74 of the retractable and rewinding wheel 7, and the end of the rolling curtain 1 is fixedly connected to the curtain wheel 74; the retractable and rewinding wheel 7 is fixedly connected to the fixed plate connecting the two guide side strips 2 through a support plate 75; the retracting motor 71 is fixedly connected to the inner side of the support plate 75 through a third support plate; the retracting motor 71 is driven to rotate the rotating shaft connected between the two support plates 75 through the pulley assembly 72; the two ends of the rotating shaft are respectively fixedly connected to one of the retractable and rewinding wheels 7; The retractable and extendable compensation component 8 is used to support the upper positioning wheel 3; the retractable and extendable 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 arranged between the rotating seat 81 and the mounting plate 83.

[0024] During operation, the winding motor 71 drives the rotating shaft to rotate via the pulley assembly 72, and the reel wheels 7 at both ends of the rotating shaft rotate synchronously. While the curtain wheel 74 reels the rolling curtain 1 clockwise, the line wheel 73 releases the pull cord 5 counterclockwise, or while the curtain wheel 74 releases the rolling curtain 1 counterclockwise, the line wheel 73 reels the pull cord 5 clockwise, thereby achieving the raising and lowering action of the rolling curtain 1. As the thickness of the rolling curtain 1 gradually increases during the winding process, the rolling curtain 1 generates a downward thrust on the rotating seat 81, pushing the rotating seat 81 to slide downward along the guide column 82 and compressing 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 rolling curtain 1, avoiding loosening or jamming caused by changes in the winding radius of the rolling curtain 1. During the unwinding process, as the thickness of the curtain decreases, spring 84 gradually releases its elastic potential energy, pushing the rotating seat 81 upward along the guide post 82. This allows the upper positioning wheel 3 to continuously contact the surface of the curtain 1, maintaining a stable sliding trajectory of the curtain 1 within the guide strip 2, and further reducing friction noise caused by positioning deviation. This retraction and extension compensation mechanism effectively balances the tension changes of the curtain 1 during the retraction and extension process through dynamic adjustment of the mechanical structure, providing a key guarantee for the stability of the silent effect.

[0025] like Figure 3 and Figure 7 As shown, the guide column 82 is slidably connected to the push plate 85; the spring 84 is in contact between the rotating seat 81 and the push plate 85; a threaded hole is provided on the mounting plate 83; the threaded hole is threadedly connected to the push rod 86; the upper end of the push rod 86 is in contact with the lower surface of the push plate 85.

[0026] During operation, the height of the push rod 86 in the threaded hole can be adjusted by rotating it, thereby pushing the push plate 85 up and down along the guide column 82, changing the initial compression of the spring 84. When it is necessary to increase the pressing force of the upper positioning wheel 3 on the rolling curtain 1, the push rod 86 is rotated clockwise to move the push plate 85 upward, the spring 84 is further compressed, the initial elastic potential energy increases, and the upward support force on the rotating seat 81 is increased accordingly; this adjustable structure enables the retractable compensation component 8 to adapt to rolling curtains 1 of different materials and thicknesses. By accurately controlling the preload force of the spring 84, it ensures that the fit between the upper positioning wheel 3 and the rolling curtain 1 is always in the optimal state under various working conditions, effectively avoiding surface wear of the rolling curtain 1 due to excessive force of the spring 84, or positioning failure caused by insufficient force of the spring 84, thereby extending the overall service life of the rolling shutter door while ensuring a silent effect. Secondly, during the installation of the roller shutter 1, the initial position of the retractable compensation component 8 can be quickly calibrated by adjusting the height of the push rod 86, thereby reducing the risk of positioning deviation due to installation errors and improving the convenience of equipment assembly and the level of precision control.

[0027] like Figure 3 and Figure 7 As shown, the end of the push rod 86 is fixedly connected to the sliding gear 87; one side of the sliding gear 87 is engaged with the driving gear 88; the driving gear 88 is fixedly connected to the rotating shaft of the adjusting motor 89 through the extension shaft 881; the adjusting motor 89 is fixedly connected to the support plate 75; a pressure sensor is arranged between the lower end of the spring 84 and the push plate 85.

[0028] During operation, the pressure sensor monitors the pressure applied by spring 84 to push plate 85 in real time and transmits this data to the control system. If the pressure deviates from the preset range during winding or unwinding of the rolling curtain 1, the control system activates the adjustment motor 89, which rotates the drive gear 88 via the extended shaft 881. The meshing of the drive gear 88 with 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 the spring 84. For example, if the rolling curtain 1 deteriorates slightly due to long-term use, the pressure sensor detects that the pressure of spring 84 has fallen below the lower threshold. The control system immediately activates the adjustment motor 89 clockwise, causing the push rod 86 to move upward, pushing the push plate 85 to compress the spring 84 until the pressure returns to the set range. Conversely, if foreign matter adheres to the surface of the rolling curtain 1, causing a local increase in thickness, the pressure sensor reports that the pressure exceeds the limit, and the adjustment motor 89 rotates counterclockwise, causing the push rod 86 to move downward, reducing the tension of the spring 84 to prevent excessive compression of the rolling curtain 1. This closed-loop feedback adjustment mechanism enables automated dynamic calibration of the retraction and extension compensation component 8, adapting to the changing physical properties of the roller shutter 1 and complex operating conditions in real time without manual intervention, significantly improving the accuracy and responsiveness of silent control. Furthermore, the continuous monitoring data from the pressure sensor serves as a basis for equipment health diagnosis. By analyzing the pressure change curve, it can provide early warning of potential faults such as spring 84 fatigue and roller shutter 1 wear, providing data support for maintenance and further enhancing the reliability and intelligent operation of the silent rolling shutter door.

[0029] like Figure 8 and Figure 9 As shown, the roller blind 1 is made of narrow strips 11 hinged in sequence; rubber strips 12 are provided between the hinged surfaces of adjacent narrow strips 11; sealing strips 13 are provided on both sides of the roller blind 1; the sealing strips 13 are fixedly connected to the roller blind 1; damping components 9 are provided at both ends of the guide side strips 2; the damping components 9 squeeze the sealing strips 13 on both sides of the roller blind 1 inward.

[0030] During operation, when the roller shutter 1 is subjected to tension and needs to be reeled in, one end of the roller shutter 1 is pulled and needs to overcome the friction of the damping assembly 9 at the other end. Since the friction resistance of the damping assembly 9 is greater than the deformation resistance of the rubber strip 12, the roller shutter 1 increases in length by squeezing the rubber strips 12 at each hinge. As the roller shutter 1 is stretched, the sealing strip 13 on its surface is also stretched, which reduces the thickness of the sealing strip 13. As a result, the sealing strip 13, which was in contact with the inner wall of the guide side strip 2 in a static state, 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 shutter 1 moves, further eliminating potential noise sources at the structural level. After the roller shutter 1 stops moving, the tension disappears, and the elastic recovery force of the rubber strip 12 drives the roller shutter 1 to return to its original length. The thickness of the sealing strip 13 rebounds and is tightly fitted with the inner wall of the guide side strip 2 again, ensuring that the sealing performance of the door body is not affected. This combined design of "dynamic clearance elimination and static sealing" cleverly balances the dual requirements of silent operation and sealing protection. Furthermore, the damping assembly 9, by continuously squeezing the sealing strip 13, effectively removes dust particles adhering to the surface of the roller shutter 1, reducing the probability of foreign matter entering the track of the guide strip 2 and the risk of frictional noise caused by stuck impurities. It also slows the aging of the sealing strip 13, indirectly improving the maintenance cycle and operational stability of the roller shutter door.

[0031] like Figure 8 and Figure 9 As shown, Figure 8 and Figure 9 As shown, the sealing strip 13 is connected to the roller blind 1 via intermittent fixed connection points.

[0032] The fixed connection points are evenly spaced along the length of the roller blind 1. The sealing strips 13 between adjacent connection points are in a non-fixed, free state. Consequently, when the roller blind 1 causes the sealing strips 13 to stretch, all the non-fixed, free-state sealing strips 13 can be stretched, resulting in a more uniform stretching of the sealing strips 13. The stretched and thinned length of the sealing strips 13 increases, thereby reducing the area of ​​contact between the sealing strips 13 and the inner wall of the guide strips 2, thereby reducing the probability of friction between the two. For example, when the roller blind 1 is 2 meters long and the fixed connection point spacing is set at 20 centimeters, each sealing strip 13 will form 9 non-fixed, free segments. Compared to a fixed, integral sealing strip 13, its deformation uniformity during stretching is improved by approximately 40%, and the contact area with the inner wall of the guide strips 2 can be reduced to less than 30% of the original value. This segmented fixed structure also prevents material fatigue fracture of the sealing strips 13 caused by localized overstretching. By distributing 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. At the same time, the presence of the non-fixed section allows the sealing strip 13 to naturally shrink and fit the curtain surface when the roller curtain 1 is rolled up, avoiding the wrinkles or stacking phenomenon caused by the traditional integral fixed sealing strip 13 during the winding process, and further reducing the friction noise between the internal structures when the roller curtain 1 is rolled up, providing structural support for the comprehensive optimization of the silent performance.

[0033] 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 blind 1 are connected at an intermittent fixed connection point through an undercut structure.

[0034] The inverted buckle structure includes a T-shaped clamp provided on the inner side of the sealing strip 13 and an inverted trapezoidal slot opened on the surface of the narrow strip 11 of the rolling curtain 1 (the opposite is true on the other side of the rolling curtain 1). The diameter of the transverse section of the T-shaped clamp is larger than the opening width of the inverted trapezoidal slot, and the longitudinal section of the T-shaped clamp is in a clearance fit with the inner wall of the inverted trapezoidal slot. During installation, the T-shaped clamp of the sealing strip 13 is aligned with the opening of the inverted trapezoidal slot and pressure is applied. The transverse section of the T-shaped clamp is elastically deformed and squeezed into the interior of the slot. The structural feature of the inverted trapezoidal slot, which is wide at the top and narrow at the bottom, is used to achieve axial limitation. At the same time, the clearance fit between the longitudinal section of the T-shaped clamp and the inner wall of the slot allows the sealing strip 13 to produce a slight displacement along the length direction when stretched. The spacing of the inverted buckle 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.

[0035] In the second embodiment of the intermittent fixed connection point, the sealing strip 13 and the roller blind 1 are connected at the intermittent fixed connection point by adhesive bonding.

[0036] The colloid bonding utilizes a modified acrylic structural adhesive. A dispensing process forms circular adhesive dots with a diameter of 5-8mm at pre-set fixed connection points, with a controlled adhesive layer thickness of 0.3-0.5mm. Before adhesive application, the surface of the narrow strip 11 of the roller shutter 1 is sandblasted to remove a 0.5-1μm oxide layer and achieve 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 over 45mN / m. After curing, the colloid forms a connection node with a shear strength of ≥15MPa and a peel strength of ≥5N / mm. Its elastic modulus matches the deformation requirements of the sealing strip 13, allowing for elastic displacement of no more than 0.2mm at the adhesive dots when the roller shutter 1 is stretched, thus avoiding stress concentration caused by a rigid connection. This bonding method can achieve the precise layout of 12-15 fixing points per square meter on the roller shutter 1, and the spacing error between adjacent glue points is controlled within the range of ±0.5mm. The chemical stability and mechanical strength of the glue layer ensure the durability of the connection node within the operating temperature range of -30℃ to 70℃. At the same time, the damping properties of the glue itself can absorb part of the vibration energy, further reducing the friction noise between the sealing strip 13 and the roller shutter 1.

[0037] like Figure 10 As shown, a first embodiment of the damping assembly, 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 belts 93 are symmetrically arranged on both sides of the fourth support plate 91; the belts 93 are in extrusion contact with the sealing strip 13; the belts 93 are 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 tightly fitted and fixedly connected to the fourth support plate 91 on the rotating shaft of the first extrusion wheel 92.

[0038] During operation, when the roller blind 1 moves up and down within the guide side strip 2, the sealing strips 13 on both sides thereof are in surface contact and compression with the belt 93 of the damping assembly 9. The belt 93 is maintained in a tensioned state under the support of the first extrusion wheel 92, and the first damping rubber ring on the rotating shaft of the first extrusion wheel 92 generates a constant friction force through a tight fit with the fourth support plate 91. This friction force is transmitted to the surface of the sealing strip 13 through the belt 93, forming a damping force that hinders the movement of the roller blind 1. As a result, the sealing strip 13 on its surface is also stretched as the roller blind 1 is stretched. As a result, the sealing strip 13, which was in contact and sealed 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. 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 at the structural level.

[0039] like Figure 11As shown, 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 and are evenly spaced vertically; the second extrusion wheels 95 are in extrusion contact with the sealing strip 13; the second extrusion wheel 95 is rotatably connected to the fifth support plate 94 through a rotating shaft, and a second damping rubber ring is tightly fitted and fixedly connected to the fifth support plate 94 on the rotating shaft of the second extrusion wheel 95.

[0040] During operation, when the roller shutter 1 drives the sealing strip 13 up and down, the second extrusion wheel 95 forms line contact with the sealing strip 13 through its outer circumference. Compared to the surface contact of the belt 93, the multi-point distribution of the second extrusion wheel 95 can more evenly transmit the damping force. The second damping rubber ring is made of nitrile rubber with a Shore hardness of 65-70A. It is installed on the rotating shaft of the second extrusion wheel 95 through an interference fit, forming a stable friction 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 controlled by adjusting the interference of the rubber ring (controlled within the range of 0.15-0.2mm). The evenly spaced second extrusion wheels 95 (spaced 8-10 cm apart) vertically provide multi-point support for the sealing strip 13, preventing lateral deviation of the long strip during stretching and ensuring it remains aligned with the pre-set trajectory of the guide strip 2. This further reduces noise generated by the swaying sealing strip 13 and its collision with the inner wall of the side strip. This multi-wheel damping structure maintains a single-wheel pressure of 3-5N. This distributed pressure design significantly reduces localized pressure on the surface of the sealing strip 13 while maintaining effective damping, effectively slowing wear and ensuring long-term, silent operation.

[0041] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A silent rolling door, characterized by: The invention comprises a rolling curtain (1), a guide side strip (2), an upper positioning wheel (3), a lower positioning wheel (4) and a pull rope (5); the two sides of the rolling curtain (1) slide in the guide side strips (2) symmetrically arranged on both sides; an upper positioning wheel (3) is arranged above the guide side strip (2); the guide side strip (2) is tangent to the upper positioning wheel (3); the rolling curtain (1) extends from the upper end of the guide side strip (2) and then 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 strip (2); the lower positioning wheel (4) is rotatably connected to the guide side strip (2) through a first support plate; the guide side strip (2) is tangent to the lower positioning wheel (4); the lower end of the rolling curtain (1) is fixedly connected to one end of the pull rope (5); the pull rope (5) extends from the lower end of the guide side strip (2) and then passes around the lower positioning wheel (4); the lower positioning wheel (4) rotates freely.

2. The silent rolling door according to claim 1, characterized in that: The invention also includes a reversing wheel (6), a retracting and unretracting reel (7), a retracting motor (71), a pulley assembly (72) and a retracting and unretracting compensation component (8); the pull rope (5) passes around the lower positioning wheel (4) and then passes around the reversing wheel (6) vertically upward; the reversing wheel (6) is rotatably connected to the side wall of the upper end of the guide side strip (2) through the second support plate; the pull rope (5) passes around the reversing wheel (6) and then passes around the wire wheel (73) of the retracting and unretracting reel (7) in a counterclockwise direction, and the end of the pull rope (5) is fixedly connected to the wire wheel (73); the roller blind (1) passes around the upper positioning wheel ( 3) The rear edge is wound clockwise around the curtain wheel (74) of the retractable roller (7), and the end of the rolling curtain (1) is fixedly connected to the curtain wheel (74); the retractable roller (7) is fixedly connected to the fixed plate connected to the two guide side strips (2) through the support plate (75); the retracting motor (71) is fixedly connected to the inner side of the support plate (75) through the third support plate; the retracting motor (71) drives the rotating shaft connected between the two support plates (75) to rotate through the pulley assembly (72); the two ends of the rotating shaft are respectively fixedly connected to one of the retractable rollers (7); The retractable and extendable compensating component (8) is used to support the upper positioning wheel (3); the retractable and extendable compensating 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 arranged between the rotating seat (81) and the mounting plate (83).

3. The silent rolling door according to claim 2, characterized in that: The guide column (82) is slidably connected to a push plate (85); the spring (84) is in contact 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) is in contact with the lower surface of the push plate (85).

4. The silent rolling door according to claim 3, characterized in that: The end of the push rod (86) is fixedly connected to the sliding gear (87); one side of the sliding gear (87) is engaged with the driving gear (88); the driving gear (88) is fixedly connected to the rotating shaft of the adjustment motor (89) through an extension shaft (881); the adjustment motor (89) is fixedly connected to the support plate (75); and a pressure sensor is provided between the lower end of the spring (84) and the push plate (85).

5. The silent rolling door according to claim 2, characterized in that: The rolling curtain (1) is made by hingedly connecting narrow strips (11) in sequence; a rubber strip (12) is provided between the hinged surfaces of adjacent narrow strips (11); sealing strips (13) are provided on both sides of the rolling curtain (1); the sealing strips (13) are fixedly connected to the rolling curtain (1); damping components (9) are provided at both ends of the guide side strips (2); the damping components (9) press the sealing strips (13) on both sides of the rolling curtain (1) inward.

6. The silent rolling door according to claim 5, characterized in that: The sealing strip (13) is connected to the roller blind (1) via intermittent fixed connection points.

7. The silent rolling door according to claim 6, characterized in that: The sealing strip (13) and the roller blind (1) are connected at intermittent fixed connection points via an undercut structure.

8. The silent rolling door according to claim 6, characterized in that: The sealing strip (13) and the rolling curtain (1) are connected at intermittent fixed connection points through colloid bonding.

9. The silent rolling door according to claim 5, 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 belts (93) are symmetrically arranged on both sides of the fourth support plate (91); the belts (93) are in extrusion contact with the sealing strip (13); the belts (93) are 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 sleeved on the rotating shaft of the first extrusion wheel (92) and is tightly fitted and fixedly connected to the fourth support plate (91).

10. The silent rolling door according to claim 5, characterized in that: The damping assembly (9) comprises 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 are evenly spaced in the vertical direction; the second extrusion wheels (95) are in extrusion contact with the sealing strip (13); the second extrusion wheel (95) is rotatably connected to the fifth support plate (94) via a rotating shaft, and a second damping rubber ring is sleeved on the rotating shaft of the second extrusion wheel (95) and is tightly fitted and fixedly connected to the fifth support plate (94).

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