Curtain structure

Abstract

A curtain structure includes a curtain body, a rope winding device and at least two dampers. The rope winding device is composed of a bottom shell, a first rope winding wheel, a second rope winding wheel, a planetary gear set, a top shell, a force receiving wheel and an upper cover. The driving gear of the first rope winding wheel is connected to the force receiving wheel through the planetary gear set. The high reduction ratio of the planetary gear set effectively reduces the use of the volute spring, greatly reduces the length and volume of the volute spring, helps to reduce the use cost of the volute spring, improves the practicability of the structure, and the dampers can increase the friction resistance of the rope body, preferentially brake to prevent the rope body from being retracted, reduce the elastic balance force of the two volute springs, effectively prolong the service life of the two volute springs, and improve the durability of the structure.

Description

Technical Field

[0001] This invention relates to a curtain structure, specifically a curtain structure without a pull cord. Background Technology

[0002] Curtains are tools used in indoor environments to temporarily block light from windows, avoiding excessive sunlight and ensuring a certain degree of privacy. Generally, the height of curtains is controlled by a pull cord. However, because pull cords can cause entanglement or suffocation, curtains have gradually been improved to cordless forms, using a retractable mechanism to assist the pull cord that runs through the curtain slats. However, frequent use of the retractable mechanism to adjust the curtain to a designated position requires repeatedly opening and closing the springs to rotate the gears. Limiting the position of the curtains inevitably requires the use of springs to overcome this limitation. When springs are repeatedly opened and closed excessively for extended periods, they are prone to fatigue and damage, eventually leading to instability in the retractable mechanism. Therefore, it is necessary to rely on the size of the spring itself, such as its thickness and width, to increase the elasticity. In conjunction with a limiting device, a friction force is provided to resist the movement of the pull cord and assist the spring in avoiding excessive use of elasticity and fatigue. This reduces the elasticity requirement of the spring and also reduces the size and cost of the spring.

[0003] Additionally, U.S. Patent Publication No. US11459819B2 discloses a Venetian blind structure comprising a frame; two winders inserted and supported by the frame, each winder having its own gear, wherein the gears of the winders mesh with each other to allow the winders to rotate in different directions. Two spring rollers inserted and supported on the frame, each spring roller having its own gear, wherein the gears of the spring rollers mesh with each other to allow the spring rollers to rotate in different directions. A spring sheet comprises two segments, each wound around a spring roller; as the spring rollers rotate, one segment of the spring sheet lengthens and the other segment shortens. A reducer is located outside the frame, allowing the reducer to be replaced by another reducer, wherein the reducer includes a guide wheel connected to one of the spring rollers and a driven wheel connected to one of the spring rollers, wherein the guide wheel is operatively connected to the driven wheel, wherein the diameter of the guide wheel is smaller than the diameter of the driven wheel, such that the winder rotates slower than the spring winder, and wherein no spring winder engages with any of the spring winders without engaging the reducer.

[0004] The existing spring roll and the linear roll do not have a direct transmission relationship. The energy storage wheel must be indirectly driven to rotate through the guide wheel and driven wheel of the reduction wheel. Therefore, the existing reduction wheel fails to increase the torque of the spring roll, and the spring sheet cannot effectively reduce the length and volume. With the increasing price of spring sheets, it is difficult to effectively reduce the structural cost. It also causes design problems for the transmission mechanism, which has a large assembly space. There is a real need for improvement.

[0005] In view of this, the inventor of this invention, with many years of experience in manufacturing, developing and designing related products, has designed and carefully evaluated the above-mentioned objectives, and finally obtained this invention which is indeed practical. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a cordless curtain structure to address the above-mentioned deficiencies in the prior art.

[0007] The aforementioned curtain structure includes: a curtain body having an upper rail and a curtain body connected to and actuated by at least two ropes; a rope winder installed within the upper rail of the curtain body, the rope winder being composed of a bottom shell, a first rope winder, a second rope winder, a top shell, a force-bearing wheel, and a top cover, wherein the bottom shell has a first spindle and a second spindle for positioning the first and second rope winder assemblies respectively, the first and second rope winders each having at least one rope winding space for fixing one end of each of the two ropes respectively, and the first and second rope winders each having a gear plate that meshes with each other, and a drive gear is provided at the top axis position of the first rope winder, the top shell and the bottom shell being assembled together, further connecting the first and second rope winders. Two sheaves are confined between the bottom shell and the top shell. A planetary gear seat is provided on the upper surface of the top shell, and at least two fixed shafts are symmetrically arranged on both sides of the planetary gear seat. A through hole is provided in the center of the planetary gear seat for the drive gear to pass through and protrude. Multiple planetary gears are arranged around the through hole to mesh with the drive gear. A hollow sleeve with internal ring teeth is formed in the center of the force-receiving wheel, and this hollow sleeve is fitted around the planetary gear seat to mesh with the planetary gears. At least two spiral springs are wound around both sides of the force-receiving wheel. Both spiral springs are mounted on the two fixed shafts via a rotating base. The top cover covers the force-receiving wheel and the two spiral springs from top to bottom and is then fastened and fixed to the top shell. A damper comprising a first body, a second body, and a limiting member. The first body has a combined space extending through both sides, and a rope outlet hole at the bottom communicating with the combined space. The second body has a hollowed-out portion at its upper and lower ends, and a rope inlet hole at one end communicating with the hollowed-out portion. The hollowed-out portion has a first guide wheel and a first guide rod. The first guide wheel is adjacent to the rope inlet hole, and the first guide rod is lower than the first guide wheel and relatively close to the other end of the second body. The limiting member is inserted into the hollowed-out portion of the second body from bottom to top and is pivotally positioned with the hollowed-out portion via a pivot shaft. A second guide wheel is coaxially provided at one end of the limiting member with the pivot shaft, and a third guide wheel is provided at the other end. The limiting member is recessed in a... The locking groove is located between the second and third guide wheels. The limiting member can swing in the hollow part through the pivot shaft, and the locking groove is positioned above the first guide rod. The second body and the limiting member are assembled in the combined space of the first body. One end with the rope inlet hole protrudes from one side of the first body, and the lower end of the second body communicates with the rope outlet hole. The other end of the rope enters through the rope inlet hole and passes sequentially above the first guide wheel, below the third guide wheel, above the first guide rod, below the second guide wheel, then goes up around the second and third guide wheels and then down through the rope outlet hole. Finally, the two dampers are installed in the upper rail and on both sides of the rope winder, and the other end of the rope is connected to the curtain.

[0008] Preferably, the bottom shell is open at both the left and right ends and each end is provided with at least one guide rope pulley. The upper surface of the top shell is provided with two arc-shaped protective plates outside the fixed shaft, and the arc-shaped protective plates cover and protect the two spiral springs.

[0009] Preferably, the upper end of the first body of the damper is provided with a slat controller connected to the curtain body, so as to rotate and control the angle of the curtain body to adjust the light blocking and light transmittance.

[0010] Preferably, the first body has multiple symmetrical latching parts in the assembly space, and two limiting recesses are provided at the bottom near one side. A limiting protrusion is provided at the middle of the bottom of both sides of the second body. The two limiting protrusions and the two limiting recesses fit and abut against each other, further limiting the depth of the second body into the assembly space, and the latching parts are used to clamp and fix the second body.

[0011] Preferably, the first and second winding wheels of the rope winder each have two winding spaces on the upper and lower layers. Each winding space has one end of a rope fixed, thus having four ropes and four dampers. The second body of each damper has a second guide rod at the other end, which is different from the rope inlet hole. The second guide rod is positioned higher than the first guide wheel, so that after the other two ropes pass through the rope inlet holes of two of the dampers, they can be raised by the second guide rod to avoid the first guide wheel, thereby facilitating the winding and connection of the other two ropes and the other two dampers and their connection to the curtain body.

[0012] Preferably, the planetary gear housing has multiple shafts centered on the through hole for fitting the planetary gear. The lower surface of the upper cover has a protrusion, and at least two engaging protrusions are symmetrically arranged on both sides of the protrusion. The protrusion has a limiting through hole at its center, and multiple engaging through holes are arranged around the limiting through hole. The protrusion faces the hollow sleeve hole of the force-bearing wheel. The limiting through hole fits and restricts the top of the drive gear, while the engaging through holes are inserted into the top of the shaft. The two engaging protrusions are inserted and restrict the two rotating seats.

[0013] Compared to the effectiveness of previous technologies:

[0014] (i) The rope winder is connected to the force-bearing wheel through the planetary gear. The high reduction ratio of the planetary gear can effectively reduce the number of pounds used in the spiral spring, and greatly reduce the length and volume of the spiral spring. This not only helps to reduce the cost of using the spiral spring, but also allows for flexible selection of the number of spiral springs according to the curtain material, so as to facilitate the selection and assembly of the curtain and improve the practicality of the structure.

[0015] (ii) The damper can increase the frictional resistance of the rope, and can brake first to prevent the rope from being pulled back. It reduces the elastic balancing force of the two spiral springs, so as to achieve the winding operation of the two spiral springs and the pulling down and unfolding action of the curtain. This makes it suitable for curtains of various sizes, effectively extends the elastic life of the two spiral springs, and thus improves the durability of the structure. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 3 This is a partially enlarged exploded view of the rope reel of the present invention.

[0019] Figure 4 This is an exploded view of a partially enlarged portion of the damper of the present invention.

[0020] Figure 5 This is a combined cross-sectional view of the present invention.

[0021] Figure 6 Corresponding to the present invention Figure 5 Enlarged sectional view of the framed rope reel.

[0022] Figure 7 Corresponding to the present invention Figure 5 Enlarged sectional view of the damper.

[0023] Figure 8 Corresponding to the present invention Figure 6 A sectional view with AA section lines.

[0024] Figure 9 Corresponding to the present invention Figure 6 A sectional view with BB section.

[0025] Figure 10 This is a schematic diagram illustrating the use of the curtain of the present invention when pulled down and unfolded.

[0026] Figure 11 This is a cross-sectional view of the rope body of the present invention being pulled out by the rope reel.

[0027] Figure 12 This is a schematic diagram showing the rope of the present invention being pulled out from the rope outlet of the damper.

[0028] Figure 13 This is a schematic diagram of the spiral spring wound up by the force-bearing wheel of the present invention as the rope is pulled out.

[0029] Figure 14 This is a schematic diagram of the first and second rope reels of the present invention engaging with each other as the rope is pulled out.

[0030] Figure 15 This is a schematic diagram illustrating the use of the curtain body in pushing up and closing according to the present invention.

[0031] Figure 16 This is a schematic diagram of the rope of the present invention being pulled back through the rope inlet of the damper.

[0032] Figure 17 This is a schematic diagram of another embodiment of the present invention.

[0033] Figure 18 This is a partially enlarged schematic diagram of another embodiment of the present invention.

[0034] Symbol explanation:

[0035] 10: Curtain Body

[0036] 11: Upper rail

[0037] 12: Rope body

[0038] 13: Curtain

[0039] 131: Counterweight rail

[0040] 20: Rope Winder

[0041] 21: Bottom shell

[0042] 211: First mandrel

[0043] 212: Second mandrel

[0044] 213: Guide rope pulley

[0045] 22: First reel

[0046] 221: Rope Roll Space

[0047] 222: Gear Disc

[0048] 223: Drive gear

[0049] 23: Second reel

[0050] 231: Rope Roll Space

[0051] 232: Gear Disc

[0052] 24: Top shell

[0053] 241: Planetary Gear Constellation

[0054] 242: Perforation

[0055] 243: Shaft

[0056] 244: Planetary Gear

[0057] 245: Fixed shaft

[0058] 246: Arc-shaped guard plate

[0059] 25: Load-bearing wheel

[0060] 251: Inner ring teeth

[0061] 252: Hollow sleeve hole

[0062] 253: Spiral Spring

[0063] 254: Reseat

[0064] 26: Top Cover

[0065] 261: convex seat

[0066] 262: Engaging cam shaft

[0067] 263: Limiting perforation

[0068] 264: Fitting piercing

[0069] 30: Damper

[0070] 31:First body

[0071] 311: Combinatorial Space

[0072] 312: Rope outlet hole

[0073] 313: Buckle section

[0074] 314: Limiting recess

[0075] 32: Second Body

[0076] 321: Openwork section

[0077] 322: Rope Inlet

[0078] 323: First Guide Wheel

[0079] 324: First guide rod

[0080] 325: Limiting convex part

[0081] 326: Second guide rod

[0082] 33: Limiting component

[0083] 331: Pivot axis

[0084] 332: Second guide wheel

[0085] 333: Third Guide Wheel

[0086] 334: Card Slot

[0087] 34: Curtain slat controller Detailed Implementation

[0088] To further understand and appreciate the purpose, features, and effects of this invention, the following is a detailed description in conjunction with the accompanying drawings:

[0089] First, please let Figures 1 to 9As shown, a curtain structure includes: a curtain body 10, a cord winder 20, and at least two dampers 30. The curtain body 10 has an upper rail 11 and a curtain body 13 connected to and actuated by at least two cords 12. The bottom end of the curtain body 13 has a counterweight rail 131. The cord winder 20 is composed of a bottom shell 21, a first cord winder 22, a second cord winder 23, a top shell 24, a force-receiving wheel 25, and a top cover 26. The bottom shell 21 has a first spindle 211 and a second spindle 212 for positioning the first and second cord winders 22 and 23, respectively. The left and right ends of the bottom shell 21 are open and each has at least one guide wheel 213. The first and second cord winders 22 and 23... Each has at least one rope winding space 221, 231, which respectively fixes one end of the two rope bodies 12 and pre-winds them. The first and second rope winding wheels 22 and 23 are each provided with a toothed disc 222, 232, which meshes and moves with each other. A drive gear 223 is protruding from the top axis of the first rope winding wheel 22. The top shell 24 and the bottom shell 21 are assembled together, further confining the first and second rope winding wheels 22 and 23 between the bottom shell 21 and the top shell 24. A planetary gear seat 241 is provided on the upper surface of the top shell 24. The planetary gear seat 241 has a through hole 242 through its center for the drive gear 223 to pass through and protrude. The planetary gear seat 241 is provided with multiple shafts 243 centered on the through hole 242. Multiple planetary gears are sleeved on the shafts 243. Gear 244 meshes with drive gear 223. At least two fixed shafts 245 are symmetrically arranged on both sides of the planetary gear seat 241. Two arc-shaped guard plates 246 are provided on the outer sides of the two fixed shafts 245. A hollow sleeve hole 252 with inner ring teeth 251 is formed in the center of the force-receiving wheel 25, and the hollow sleeve hole 252 is fitted around the planetary gear seat 241 to mesh with the planetary gear 244. At least two spiral springs 253 are coiled on both sides of the force-receiving wheel 25. Because the spring force is distributed due to the use of the planetary gear 244, at least two spiral springs 253 are used to increase its torque and thus enhance its force. Both spiral springs 253 are mounted on the two fixed shafts 245 via a rotating seat 254 and connected to the planetary gear seat 241. An arc-shaped protective plate 246 covers and protects the two spiral springs 253. A protrusion 261 is provided on the lower surface of the upper cover 26, and at least two engaging protrusions 262 are symmetrically provided on both sides of the protrusion 261. A limiting through hole 263 is provided in the center of the protrusion 261, and multiple engaging through holes 264 are provided around the periphery of the limiting through hole 263. The protrusion 261 faces the hollow sleeve hole 252 of the force-bearing wheel 25. The limiting through hole 263 is fitted to restrict the top end of the drive gear 223, and the engaging through holes 264 are inserted into the top end of the shaft 243. The two engaging protrusions 262 are inserted to restrict the two rotating seats 254. In this way, the upper cover 26 covers the force-bearing wheel 25 and the two spiral springs 253 from top to bottom, and is fastened and fixed to the top shell 24.The damper 30 has a first body 31, a second body 32, and a limiting member 33. The first body 31 has a combined space 311 extending through both sides, and a rope outlet hole 312 at the bottom communicating with the combined space 311. The combined space 311 has multiple symmetrically arranged latching parts 313, and two limiting recesses 314 are provided at the bottom near one side. The second body 32 has a hollowed-out part 321 at the upper and lower ends, and a rope inlet hole 322 at one end communicating with the hollowed-out part 321. The hollowed-out part 321 has a first guide wheel 323 and a first guide rod 324. The first guide wheel 323 is adjacent to the rope inlet hole 324. The rope hole 322, the first guide rod 324 is lower than the first guide wheel 323 and relatively close to the other end of the second body 32, and a limiting protrusion 325 is provided at the middle of the bottom of both sides of the second body 32. The limiting member 33 is assembled into the hollow part 321 of the second body 32 from bottom to top, and is pivotally positioned with the hollow part 321 via a pivot shaft 331. A second guide wheel 332 is provided coaxially with the pivot shaft 331 at one end of the limiting member 33, and a third guide wheel 333 is provided at the other end. The limiting member 33 has a retaining groove 334 between the second and third guide wheels 332 and 333. The limiting member 33 can be driven through the pivot shaft. 331 swings in the hollowed-out portion 321, and the locking groove 334 is positioned above the first guide rod 324. The second body 32, together with the limiting member 33, is assembled in the assembly space 311 of the first body 31. The two limiting protrusions 325 and the two limiting recesses 314 of the second body 32 fit and abut against each other, further limiting the depth of the second body 32 into the assembly space 311. The second body 32 is further secured by the buckle portion 313. One end with the rope inlet hole 322 protrudes from one side of the first body 31, and the lower end of the second body 32 communicates with the rope outlet hole 312. The rope 1 The other end of the rope 12 is pulled out by the guide rope wheels 213 on the left and right sides of the bottom shell 21, and enters the hollow part 321 through the rope inlet holes 322 of the two dampers 30 respectively. The rope 12 passes sequentially above the first guide wheel 323, below the third guide wheel 333, above the first guide rod 324, and below the second guide wheel 332. Then it goes up and around the second and third guide wheels 332 and 333, and then goes down through the rope outlet hole 312. Finally, the two dampers 30 are installed in the upper rail 11 and on both sides of the rope winder 20, and the other end of the rope 12 is passed down through the curtain 13 and connected to the counterweight rail 131 at the bottom.

[0090] The damper 30 has a slat controller 34 at the upper end of the first body 31 connected to the curtain 13, so as to rotate and control the angle of the curtain 13 to adjust the light blocking and light transmittance.

[0091] Its structural usage status, please then be determined by Figure 2 , 7As shown, when the curtain body 10 is not in motion, the rope 12 finally passes over the third guide wheel 333 and then stretches downward to connect the counterweight rail 131 of the curtain body 13. This causes the rope 12 to have a downward pulling force due to the weight of the counterweight rail 131, which pulls down and swings the end of the third guide wheel 333 of the limiting member 33. At this time, the locking groove 334 of the limiting member 33 moves downward to approach the first guide rod 324, thereby pressing the rope 12 down and tightly onto the first guide rod 324 and wrapping it in an S-shape between the second and third guide wheels 332 and 333. This increases the frictional resistance between the rope 12 and the limiting member 33, and the positioning effect of the curtain body 13 is achieved by the mutual counterbalancing of the two spiral springs 253 and the counterweight rail 131.

[0092] When the curtain body 13 of the curtain body 10 is pulled down and unfolded via the counterweight rail 131, please continue to... Figures 10 to 14 As shown, because the user applies force to the counterweight rail 131 and pulls it down, the sum of the pulling force and the weight of the counterweight rail 131 is greater than the elastic stress of the spiral spring 253, so that the rope 12 can be pulled out from the first and second rope pulleys 22 and 23, achieving the purpose of pulling down and unfolding the curtain 13. When the curtain 13 is pulled down and unfolded, the locking groove 334 of the limiting member 33 also presses the rope 12 down and tightens it against the first guide rod 324, so that the curtain 13... When unfolded, the curtain 13 also has a frictional resistance to prevent the rope 12 from being easily pulled out, thus reducing the unfolding speed of the curtain 13 and having a slow-descent effect. At the same time, it prevents children from playing with it and causing danger. When the curtain 13 is pulled down to the default position and released, the frictional resistance between the limiting member 33 and the rope 12 still exists, which first brakes to prevent it from being rolled back. Then, the two spiral springs 253 and the counterweight rail 131 counterbalance each other to achieve the positioning effect of the curtain 13.

[0093] Furthermore, when the curtain 13 is pulled down and unfolded, the two ropes 12 are pulled out from the winding spaces 221 and 231 of the first and second rope wheels 22 and 23, and drive the first and second rope wheels 22 and 23 to rotate. At this time, the first rope wheel 22 will drive the planetary gear 244 to rotate through the top drive gear 223, and at the same time mesh with the force wheel 25 to rotate and wind up the two spiral springs 253. Accordingly, the rotational torque of the force wheel 25 is increased by the planetary gear 244, so that the force wheel 25 winds up more effortlessly and smoothly, and easily achieves the tensioned state of the two spiral springs 253.

[0094] When the curtain body 13 of the curtain body 10 is pushed up and closed by the counterweight rail 131, please then... Figure 15 , 16 Cooperate Figure 8 , 9As shown, the user pushes against the counterweight rail 131 to reduce the vertical weight, while simultaneously relaxing the two ropes 12. At this time, the elastic stress of the two spiral springs 253 is greater than the weight of the counterweight rail 131, causing them to spring back and retract, driving the force wheel 25 to reverse. Simultaneously, the planetary gear 244 drives the first rope reel 22 to rotate, and the meshing state of the first and second rope reels 22 and 23 synchronously retracts the two ropes 12. When the two ropes 12 are retracted by the first and second rope reels 22 and 23, since the first guide wheel 323 is higher than the first guide rod 324, the tension generated when the two ropes 12 are retracted is further increased. The force propels the third guide wheel 333 of the limiting member 33 upward, causing the limiting member 33 to swing upward and simultaneously move the locking groove 334 away from the first guide rod 324. This reduces the frictional resistance of the rope 12 and improves the smoothness of winding. At the same time, the high reduction ratio of the planetary gear 244 increases the rotational speed of the first and second winding rope wheels 22 and 23, allowing the user to easily control the curtain 13 to rise and fall by gently pushing the counterweight rail 131. When the counterweight rail 131 is released, the downward pull generated by the weight of the counterweight rail 131 then pulls the third guide wheel 333 of the limiting member 33 downward and swings it through the rope 12. Figure 7 As shown, the rope 12 is pressed down again by the locking groove 334 and tightened onto the first guide rod 324, and wound in an S-shape between the second and third guide wheels 332 and 333. This increases the frictional resistance between the rope 12 and the limiting member 33, and brakes are performed first to prevent it from being wound back. Then, the two spiral springs 253 and the counterweight rail 131 counterbalance each other to achieve the positioning effect of the curtain 13.

[0095] Another embodiment of its structure, please refer to... Figure 17 , 18 As shown, the curtain body 10 increases the number of dampers 30 by increasing the area and length of the curtain body 13 to ensure the normal opening and closing of the curtain body 13. The first and second winding wheels 22 and 23 of the rope winder 20 each have two winding spaces 221 and 231 on the upper and lower layers, respectively. Each winding space 221 and 231 is fixed to one end of a rope body 12, thus providing four rope bodies 12 that can be equipped with four dampers 30. The second body 32 of the damper 30 is provided with a second guide rod 326 at the other end of the rope inlet hole 322. The second guide rod 326 is positioned higher than the first guide wheel 323 so that the other two ropes 12 can pass through the rope inlet holes 322 of the two dampers 30 and then be raised by the second guide rod 326 to avoid the first guide wheel 323. This facilitates the winding and connection of the other two ropes 12 with the other two dampers 30 and their downward assembly with the curtain body 13.

[0096] Through the structure of the above specific embodiments, the following benefits can be obtained: (i) The rope winder 20 is connected to the force-bearing wheel 25 through the planetary gear 244. The high reduction ratio of the planetary gear 244 can effectively reduce the weight of the spiral spring 253, and greatly reduce the length and volume of the spiral spring 253. This not only helps to reduce the cost of using the spiral spring 253, but also allows for flexible selection of the number of spiral springs 253 according to the curtain material volume, so as to facilitate the selection and assembly of the curtain and improve the practicality of the structure.

[0097] (ii) The damper 30 can increase the frictional resistance of the rope 12, and can brake first to prevent the rope 12 from being pulled back, reducing the elastic restraint force of the two spiral springs 253, so as to achieve the winding operation of the two spiral springs 253 and the pulling down and unfolding action of the curtain 13, so that it can be used for curtains of various sizes, effectively extending the elastic life of the two spiral springs 253, thereby improving the durability of the structure.

[0098] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention; that is, all equivalent changes and modifications made in accordance with the claims of the present invention should still fall within the scope of the present invention.

Claims

1. A curtain structure, characterized in that, Include: A curtain body having a top rail and a curtain body connected to and actuated by at least two ropes; A cord winder is installed within the upper track of the curtain body. The cord winder is composed of a base shell, a first cord winder, a second cord winder, a top shell, a force-bearing wheel, and a top cover. The base shell has a first spindle and a second spindle for positioning the first and second cord winder assemblies, respectively. Each of the first and second cord winders has at least one cord winding space to fix one end of the cord. Both the first and second cord winders are equipped with a gear plate that meshes with each other. A drive gear is located at the top center of the first cord winder's shaft. The top shell is assembled with the base shell, further confining the first and second cord winders between the base shell and the top shell. The top surface of the top shell... A planetary gear seat is provided on the surface, and at least two fixed shafts are symmetrically arranged on both sides of the planetary gear seat. A through hole is provided in the center of the planetary gear seat for the drive gear to pass through and protrude. Multiple planetary gears are provided around the through hole of the planetary gear seat to mesh with the drive gear. A hollow sleeve hole with inner ring teeth is formed in the center of the force-receiving wheel, and the hollow sleeve hole is assembled around the planetary gear seat to mesh with the planetary gear. At least two spiral springs are provided on both sides of the force-receiving wheel. The two spiral springs are assembled on the two fixed shafts through a rotating seat. The upper cover covers the force-receiving wheel and the two spiral springs from top to bottom and is then fastened and fixed to the top shell. At least two dampers are provided, each damper having a first body, a second body, and a limiting member. The first body has a combined space extending through both sides, and a rope outlet hole at the bottom communicating with the combined space. The second body has a hollowed-out portion at its upper and lower ends, and a rope inlet hole at one end communicating with the hollowed-out portion. The hollowed-out portion has a first guide wheel and a first guide rod. The first guide wheel is adjacent to the rope inlet hole, and the first guide rod is lower than the first guide wheel and relatively close to the other end of the second body. The limiting member is inserted into the hollowed-out portion of the second body from bottom to top and is pivotally positioned with the hollowed-out portion via a pivot shaft. A second guide wheel is coaxially provided at one end of the limiting member with the pivot shaft, and a third guide wheel is provided at the other end. The limiting member is recessed. A locking groove is located between the second and third guide wheels. The limiting member can swing in the hollow part through the pivot shaft, and the locking groove is positioned above the first guide rod. The second body and the limiting member are assembled in the combined space of the first body. One end with the rope inlet hole protrudes from one side of the first body, and the lower end of the second body communicates with the rope outlet hole. The other end of the rope enters through the rope inlet hole and passes sequentially above the first guide wheel, below the third guide wheel, above the first guide rod, below the second guide wheel, then goes up around the second and third guide wheels and then down through the rope outlet hole. Finally, the two dampers are installed in the upper rail and on both sides of the rope winder, and the other end of the rope is connected to the curtain body.

2. The curtain structure as described in claim 1, characterized in that, The bottom shell is open at both the left and right ends and each end is provided with at least one guide rope wheel. The upper surface of the top shell is provided with two arc-shaped protective plates outside the fixed shaft. The arc-shaped protective plates cover and protect the two spiral springs.

3. The curtain structure as described in claim 1, characterized in that, The damper has a slat controller at the upper end of its first body, which is connected to the curtain to rotate and control the angle of the curtain to adjust the light blocking and light transmittance.

4. The curtain structure as described in claim 1, characterized in that, The first body has multiple symmetrical latching parts in its assembly space, and two limiting recesses are provided at the bottom near one of them. The second body has a limiting protrusion at the middle of the bottom on both sides. The two limiting protrusions and the two limiting recesses fit together and abut against each other, further limiting the depth of the second body into the assembly space, and the latching parts are used to clamp and fix the second body.

5. The curtain structure as described in claim 1, characterized in that, The first and second winding wheels of the rope winder each have two winding spaces on the upper and lower layers. Each winding space has one end of a rope fixed, thus having four ropes and four dampers. The second body of each damper has a second guide rod at the other end, which is different from the rope inlet hole. The second guide rod is positioned higher than the first guide wheel so that the other two ropes can pass through the rope inlet holes of two of the dampers and then be raised by the second guide rod to avoid the first guide wheel. This facilitates the winding and connection of the other two ropes and the other two dampers and their connection to the curtain body.

6. The curtain structure as described in claim 1, characterized in that, The planetary gear housing has multiple shafts centered on the through hole for connecting the planetary gear. The lower surface of the upper cover has a protrusion, and at least two engaging protrusions are symmetrically arranged on both sides of the protrusion. The protrusion has a limiting through hole at its center, and multiple engaging through holes are arranged around the limiting through hole. The protrusion faces the hollow sleeve hole of the force-bearing wheel. The limiting through hole fits and restricts the top of the drive gear, while the engaging through holes are inserted into the top of the shaft. The two engaging protrusions are inserted and restrict the two rotating seats.

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