Curtain winding system with multiple constant force springs

Abstract

A curtain winding system with multiple constant-force springs, comprising an installation bracket fixedly connected to the wall body and a rotating drum connected to the curtain, one end of the installation bracket being connected to a rotating rod by a speed-changing mechanism, a constant-force spring mechanism fixedly connected to the rotating drum being arranged on the rotating rod, and the rotating rod being fixedly connected to a constant-force elastic element in the constant-force spring mechanism, characterized in that the constant-force spring mechanism comprises a constant-force spring box, the rotating drum is mounted on the constant-force spring box, the constant-force spring box is fixedly connected to the rotating drum, and the speed-changing mechanism comprises a speed-changing drum.that the speed change drum is also firmly connected to the rotating drum, that the rotating drum rotates under the drive of the curtain, and that the rotating drum drives the speed change drum and the spring box with constant force to rotate synchronously at a high speed, thus the rotating rod is rotated by the speed change mechanism at a low speed.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of non-pulling curtains, in particular to a curtain winding system with multiple constant force springs. STATE OF THE ART

[0002] The existing no-pull curtains and rainbow curtains on the market mostly use torsion spring rods or head-control constant-force springs for their opening and closing systems. These two springs have many limitations when opening and closing curtains. The further the spring rod moves downwards when opening and closing curtains, the greater the pulling force, making the curtains' rebound very difficult to control. And head-control constant-force springs have difficulty adjusting to the size and height of the curtains.

[0003] WO 2014 / 163 602 A2 relates generally to covers for architectural openings, and more particularly to methods and apparatus for operating a cover for an architectural opening.

[0004] US 2016 / 0 201 389 A1 relates to an architectural cladding, and in particular to a system and method for manual and motorized manipulation of an architectural cladding.

[0005] US 6 056 036 A relates to a device for adjusting window shutters, and in particular to a wireless window blind. CONTENT OF THE PRESENT INVENTION

[0006] To solve the above problems, the present invention provides a curtain winding system with multiple constant force springs: The aim of the present invention is thereby realized: A curtain winding system with multiple constant force springs, comprising an installation bracket fixedly connected to the wall body and a rotating drum connected to the curtain, characterized in that one end of the installation bracket is connected to a rotating rod by a speed change mechanism, wherein a constant force spring mechanism fixedly connected to the rotating drum is arranged on the rotating rod, and wherein the rotating rod is fixedly connected to a constant force elastic element in the constant force spring mechanism, wherein the constant force spring mechanism comprises a constant force spring box, that the rotating drum is mounted on the constant force spring box, that the constant force spring box is fixedly connected to the rotating drum, that the speed change mechanism comprises a speed change drum, that the speed change drum is also fixedly connected to the rotating drum, that the rotating drum rotates under the drive of the curtain, and that the rotating drum drives the speed change drum and the constant force spring box to synchronously rotate at a high speed, thus the rotating rod is rotated at a low speed by the speed change mechanism.

[0007] The speed change mechanism includes a fixed gear and a speed change tooth, the fixed gear being fixedly connected to the installation bracket, the speed change tooth being connected to the rotating rod through the speed change bracket, and an annular rotating rack is disposed in the speed change drum. The speed change tooth is mounted between the fixed gear and the rotating rack and is connected to the fixed gear and the rotating rack through gear engagement. A first fixing groove is provided on the outer side of the speed change drum to fit with the rotating drum. The number of speed change teeth is at least three.

[0008] A rotating core of the spring is arranged in the constant force spring box, an elastic member with constant force is fixedly connected to the outside of the rotating core of the spring, and a rotating rod is fixedly connected to the inside of the rotating core of the spring, and a second fastening groove is provided on the outside of the constant force spring box, which is used in mating with the rotating drum.

[0009] Fixed ribs are arranged inside the rotating drum along the length direction, wherein the fixed ribs are connected to the first fastening groove and the second fastening groove.

[0010] The cross-section of the rotating rod is D-shaped.

[0011] Elastic element with constant force is a spring with constant force.

[0012] Compared with the prior art, in the present invention, the speed of the rotating drum is adjusted by a speed change mechanism. Under the action of high-speed rotation of the rotating drum, the rotating rod rotates at a low speed to ensure that the rotating drum rotates for a sufficient number of times to meet the height of the curtain. In addition, the width of the curtain can be maximized and the weight of the bottom rail of the curtain can be reduced. By increasing and decreasing the number of constant force spring mechanisms, the requirement of the curtain size is met, and the curtain can remain at any position. The present invention has a novel structure, simple operation, wide application and easy promotion. SHORT DESCRIPTION OF THE DRAWING Fig. 1 shows a schematic structural view of the present invention. Fig. 2 shows a schematic structural view of an installation bracket. Fig. 3 shows a schematic assembly view of a speed change drum and a speed change bracket. Fig. 4 shows a schematic structural view of a speed change bracket. Fig. 5 shows a schematic diagram of direction A in Fig. 1. Fig. 6 shows a schematic structural view of a speed change drum. Fig. Figure 7 shows a schematic structural view of a constant force spring box. Fig. Figure 8 shows a schematic diagram of the internal structure of the constant force spring box. Fig. Figure 9 shows a schematic structural view of a constant force elastic element. Fig. 10 shows a schematic structural view of a rotating core of the spring. Fig. 11 shows a side view of a rotating core of the spring. Fig. 12 shows a side view of a rotating rod. Fig. Figure 13 shows a schematic assembly view of the present invention on a curtain. List of reference symbols 1 installation bracket 101 Fixed gear 2 speed change drum 3 Speed ​​change bracket 4 spring box with constant force 5 Rotating rod 6 speed change tooth 7 Rotating dental splint 8 Second mounting groove 9 elastic element with constant force 10 Rotating core of the spring 11 First fastening groove DETAILED DESCRIPTION

[0013] As in Fig. 1 to 13, a curtain winding system with multiple constant-force springs, comprising an installation bracket 1 fixedly connected to the wall body and a rotating drum connected to the curtain, wherein one end of the installation bracket 1 is connected to a rotating rod 5 by a speed change mechanism, and wherein a constant-force spring mechanism fixedly connected to the rotating drum is arranged on the rotating rod 5, and wherein the rotating rod 5 is fixedly connected to a constant-force elastic element 9 in the constant-force spring mechanism, and wherein the rotating drum is mounted on a constant-force spring box 4 of the constant-force spring mechanism, and wherein the constant-force spring box is fixedly connected to the rotating drum,At the same time, the speed change drum 2 of the speed change mechanism is also firmly connected to the rotating drum. The rotating drum rotates under the drive of the curtain. The rotating drum drives the speed change drum 2 and the constant force spring box 4 to rotate synchronously at a high speed. Thus, the rotating rod is rotated by the speed change mechanism at a low speed. When the rotating drum and the constant force spring box 4 rotate synchronously for 3.5 turns, the rotating rod 5 first rotates one turn to meet the height of the curtain. The rotating drum is adjusted by the speed change mechanism. Under the high-speed rotation of the rotating drum, the rotating rod 5 is rotated by the speed change mechanism at a low speed.To ensure that the rotating drum rotates a sufficient number of revolutions to meet the height of the curtain, the width of the curtain can be maximized and the weight of the curtain's bottom rail can be reduced. By increasing or decreasing the number of constant-force spring mechanisms, the curtain can remain in any position. The present invention has a novel structure, simple operation, wide application, and easy promotion. The speed change mechanism includes a fixed gear 101, a speed change gear 6, and a speed change drum 2. The fixed gear 101 is fixedly connected to the installation bracket 1, and the speed change gear 6 is connected to the rotating rod 5 through the speed change bracket 3. An annular rotating gear rail 7 is arranged in the speed change drum 2.and wherein the speed change tooth 6 is mounted between the fixed gear 101 and the rotating toothed rail 7, which is connected by gear engagement with the fixed gear 101 and the rotating toothed rail 7, and wherein a first fastening groove 11 is provided on the outer side of the speed change drum 2, which is used to match the rotating drum. The speed change mechanism comprises a speed change drum 2, a fixed gear 101, and a speed change tooth 6. The fixed gear 101 is fixed to the installation bracket 1, and the speed change tooth 6 is arranged on the speed change bracket 3, and the two ends of the speed change tooth 6 are pivotally connected to the speed change bracket 3, and one end of the speed change bracket 3 is fixedly connected to the rotating rod 5.and wherein the speed change drum 2 is fitted onto the speed change tooth 6 after installation on the speed change bracket 3, and wherein the outer side of the speed change tooth 6 engages with the rotating tooth rail 7, and wherein the fixed gear 101 is inserted into the inside of the speed change bracket 3, and wherein the fixed gear 101 engages with the inside of the speed change tooth 6, and wherein the speed change drum 2 is fixedly connected to the rotating drum, and wherein the rotating drum drives the speed change drum 2 to rotate, and wherein the speed change drum 2 drives the speed change bracket 3 to rotate through the rotating tooth rail 7, and wherein the speed change bracket 3 drives the rotating rod 5 to rotate, it should be noted,that the speed change teeth 6 are provided in a number of at least 3, as in , Fig. As shown in Figure 5, the speed change teeth 6 are provided in a number of four, the speed change teeth 6 and the fixed gear 101 being arranged in a planetary gear arrangement, and the rotating rod 5 rotating at a low speed when the speed change drum 2 rotating at a high speed. The specific operation is as follows: when the curtain is manually pulled down, the curtain drives the rotating drum to rotate at high speed. The rotating drum is fixedly connected to the speed change drum 2; when the rotating drum rotates at high speed, it drives the speed change drum 2 to rotate at high speed. The speed change drum 2 drives the speed change tooth 6 to rotate through the rotating tooth rail 7.The speed change gear 6 mates with the fixed gear 101 and drives the speed change bracket 3 to rotate at a low speed. The specific operation is as follows: when the rotating drum rotates 35 times, the rotating drum drives the speed change drum 2 to rotate 35 times. Through the speed change gear 6 and the fixed gear 101, the speed change drum 2 drives the speed change bracket 3. The speed change bracket 3 reaches the rotating rod 5 and rotates. The rotating rod 5 only rotates 10 times, with a speed ratio of 3.5:1. This ensures that the rotating drum rotates a sufficient number of times to meet the curtain height. The constant-force spring mechanism comprises a constant-force spring box 4 in which a rotating core of the spring 10 is arranged, wherein an elastic element with constant force 9 is fixedly connected to the outside of the rotating core of the spring 10, and wherein a rotating rod 5 is fixedly connected to the inside of the rotating core of the spring 10, and wherein a second fastening groove 8 is provided on the outside of the constant-force spring box 4, which is used to match the rotating drum, and wherein the rotating core of the spring 10 is mounted in the constant-force spring box 4, which is fixedly connected to the elastic element with constant force 9, and wherein the constant-force spring box 4 is fixedly connected to the rotating drum, and wherein the constant-force spring box 4 is placed inside the rotating drum,and wherein the constant force spring box 4 rotates synchronously with the speed change drum 2. When the constant force spring box 4 rotates at a high speed, the rotating core of the spring 10 is fixedly connected to the rotating rod 5. The rotating rod 5 drives the rotating core of the spring 10 to rotate at a low speed, thus driving the constant force elastic element 9 to deform through the rotating core of the spring 1ß. The specific fastening is as follows: inside the rotating drum, fixed ribs are arranged along the length direction, wherein the fixed ribs are connected to the first fastening groove 11 and the second fastening groove 8.and wherein the fixed ribs integrally connect the speed change drum 2 and the constant force spring box 4 through the first fastening groove 11 and the second fastening groove 8 to realize synchronous rotation of the speed change drum 2 and the constant force spring box 4. It should be noted that the rotating rod 5 is not fixedly connected to the constant force spring box 4, but is only fixedly connected to the rotating core of the spring 10, wherein the rotating core of the spring 10 is connected to the constant force spring box 4 through the constant force elastic element 9.

[0014] The cross-section of the rotating rod 5 is D-shaped. The constant-force elastic element 9 is a constant-force spring, which is the state-of-the-art. The constant-force spring consists of spiral metal discs, with the inner surface of the metal disc curved so that each circle of the metal disc is tightly wound on an inner metal disc. When the metal disc is stretched (twisted), the internal tension resists the loading force, which is exactly the same as that of an ordinary tension spring, but the coefficient is almost constant (zero). In use, the ID is usually tightly wound on the roller, and one free end is connected to the load like a counterweight, but the process can also be reversed. The free end is fixed, and the spring itself provides the working force, just like the carbon brush in an electrical device.

[0015] The present invention has the following operation: a constant force spring mechanism is arranged on the rotating rod 5 and is firmly connected to the rotating drum. The rotating rod 5 is firmly connected to a constant force elastic element 9 in the constant force spring mechanism. The rotating drum is mounted on a constant force spring box 4 of the constant force spring mechanism, and the constant force spring box is firmly connected to the rotating drum. At the same time, the speed change drum 2 of the speed change mechanism is also firmly connected to the rotating drum. The rotating drum rotates under the drive of the curtain, and the rotating drum drives the speed change drum 2 and the constant force spring box 4 to rotate synchronously at a high speed.Thus, the rotating rod is rotated at a low speed by the speed change mechanism. When the rotating drum and the constant force spring box 4 rotate synchronously for 3.5 turns, the rotating rod 5 first rotates one turn to meet the height of the curtain. The speed change mechanism adjusts the rotating drum. Under the high-speed rotation of the rotating drum, the rotating rod 5 is rotated at a low speed by the speed change mechanism to ensure that the rotating drum rotates enough turns to meet the height of the curtain. In addition, the width of the curtain can be maximized and the weight of the curtain's bottom rail can be reduced.By increasing or decreasing the number of constant-force spring mechanisms, the curtain can remain in any position; the present invention has a novel structure, simple operation, wide application, and easy promotion. The speed-changing mechanism includes a fixed gear 101, a speed-changing tooth 6, and a speed-changing drum 2. The fixed gear 101 is fixedly connected to the installation bracket 1, and the speed-changing tooth 6 is connected to the rotating rod 5 through the speed-changing bracket 3. An annular rotating toothed rail 7 is arranged in the speed-changing drum 2. The speed-changing tooth 6 is connected to the fixed gear 101 and the rotating toothed rail 7 by gear meshing.and wherein a first fastening groove 11 is provided on the outer side of the speed change drum 2 and is used to fit the rotating drum. The speed change mechanism comprises a speed change drum 2, a fixed gear 101, and a speed change tooth 6. The fixed gear 101 is fixed to the installation bracket 1, and the speed change tooth 6 is arranged on the speed change bracket 3, and the two ends of the speed change tooth 6 are pivotally connected to the speed change bracket 3, and one end of the speed change bracket 3 is fixedly connected to the rotating rod 5, and the speed change drum 2 is fitted to the speed change tooth 6 after installation on the speed change bracket 3.and wherein the outer side of the speed change tooth 6 engages with the rotating toothed rail 7, and wherein the fixed gear 101 is inserted into the inside of the speed change bracket 3, and wherein the fixed gear 101 engages with the inside of the speed change tooth 6, and wherein the speed change drum 2 is fixedly connected to the rotating drum, and wherein the rotating drum drives the speed change drum 2 for rotation, and wherein the speed change drum 2 drives the speed change bracket 3 for rotation through the rotating toothed rail 7, and wherein the speed change bracket 3 drives the rotating rod 5 for rotation, it should be noted that the speed change teeth 6 are provided in a number of at least 3, as in , Fig.5, the speed change teeth 6 are provided in a number of 4, wherein the speed change teeth 6 and the fixed gear 101 are in a planetary gear arrangement, and wherein the rotating rod 5 rotates at a low speed when the speed change drum 2 rotates at a high speed. When the curtain is manually pulled down, the curtain drives the rotating drum to rotate at high speed. The rotating drum is fixedly connected to the speed change drum 2; when the rotating drum rotates at a high speed, it drives the speed change drum 2 to rotate at high speed. Through the rotating toothed rail 7, the speed change drum 2 drives the speed change tooth 6 to rotate.The speed change gear 6 mates with the fixed gear 101 and drives the speed change bracket 3 to rotate at a low speed. The specific operation is as follows: when the rotating drum rotates 35 times, the rotating drum drives the speed change drum 2 to rotate 35 times. Through the speed change gear 6 and the fixed gear 101, the speed change drum 2 drives the speed change bracket 3. The speed change bracket 3 reaches the rotating rod 5 and rotates. The rotating rod 5 only rotates 10 times, with a speed ratio of 3.5:1, ensuring that the rotating drum rotates a sufficient number of times to meet the curtain height. The constant force spring mechanism includes a constant force spring box 4.in which a rotating core of the spring 10 is arranged, wherein a constant-force elastic element 9 is firmly connected to the outside of the rotating core of the spring 10, and wherein a rotating rod 5 is firmly connected to the inside of the rotating core of the spring 10, and wherein a second fastening groove 8 is provided on the outside of the constant-force spring box 4, which is used in conjunction with the rotating drum, and wherein the rotating core of the spring 10 is mounted in the constant-force spring box 4, which is firmly connected to the constant-force elastic element 9, and wherein the constant-force spring box 4 is firmly connected to the rotating drum, and wherein the constant-force spring box 4 is placed inside the rotating drum, and wherein the constant-force spring box 4 rotates synchronously with the speed-changing drum 2,When the constant force spring box 4 rotates at a high speed, the rotating core of the spring 10 is firmly connected to the rotating rod 5, whereby the rotating rod 5 drives the rotating core of the spring 10 to rotate at a low speed, thus driving the constant force elastic element 9 to deform through the rotating core of the spring 10. The specific fastening is as follows: inside the rotating drum, fixed ribs are arranged along the length direction, wherein the fixed ribs are connected to the first fastening groove 11 and the second fastening groove 8, and wherein the fixed ribs integrally connect the speed change drum 2 and the constant force spring box 4 through the first fastening groove 11 and the second fastening groove 8.To achieve synchronous rotation of the speed-changing drum 2 and the constant-force spring box 4, it should be noted that the rotating rod 5 is not rigidly connected to the constant-force spring box 4, but only rigidly connected to the rotating core of the spring 10. The rotating core of the spring 10 is connected to the constant-force spring box 4 by the constant-force elastic element 9. The specific operation is as follows: when the curtain is manually pulled down, the curtain drives the rotating drum to rotate at high speed. The rotating drum is rigidly connected to the speed-changing drum 2. Through the fixed ribs, the rotating drum is rigidly connected to the speed-changing drum 2 and the constant-force spring box 4. When the rotating drum rotates at high speed,It drives the speed change drum 2 and the spring box with constant force 4 to rotate at high speed. Through the rotating toothed rail 7, the speed change drum 2 drives the speed change tooth 6 to rotate. The speed change tooth 6 matches with the fixed gear 101 and drives the speed change bracket 3 to rotate at low speed. The specific process is as follows: when the rotating drum rotates 35 times, the rotating drum drives the speed change drum 2 and the spring box with constant force 4 to rotate 35 times. Through the speed change tooth 6 and the fixed gear 101, the speed change drum 2 drives the speed change bracket 3. The speed change bracket 3 reaches the rotating rod 5 and rotates. The rotating rod 5 only rotates 10 times.The rotating rod 5 drives the rotating core of the spring 10 to rotate 10 times, so that the constant force spring rotates 10 times. The speed ratio is 3.5:1. This ensures that the rotating drum rotates a sufficient number of times to meet the curtain's height. The elastic force of the constant force spring is equal to the gravity of the curtain itself, forming a balance of gravity, allowing the curtain to be pulled to any position and stop. When the curtain is retracted, the bottom of the curtain is supported, and the balance between the curtain and the constant force spring is destroyed. The elastic force of the constant force spring drives the rotating drum to rotate, driving the curtain to retract.

[0016] In the present invention, the rotating drum is adjusted by the speed change mechanism. Under the high-speed rotation of the rotating drum, the rotating rod 5 is rotated at a low speed by the speed change mechanism to ensure that the rotating drum rotates enough times to meet the height of the curtain. In addition, the width of the curtain can be maximized and the weight of the bottom rail of the curtain can be reduced. By increasing or decreasing the number of constant force spring mechanisms, the curtain can stay in any position. The present invention has a novel structure, simple operation, wide application, and easy promotion.

Claims

[1] A curtain winding system with a plurality of constant force springs, comprising an installation bracket fixedly connected to the wall body and a rotating drum connected to the curtain, one end of the installation bracket being connected to a rotating rod by a speed change mechanism, a constant force spring mechanism fixedly connected to the rotating drum being arranged on the rotating rod, and the rotating rod being fixedly connected to a constant force elastic element in the constant force spring mechanism, characterized bythat the constant force spring mechanism comprises a constant force spring box, that the rotating drum is mounted on the constant force spring box, that the constant force spring box is fixedly connected to the rotating drum, that the speed change mechanism comprises a speed change drum, that the speed change drum is also fixedly connected to the rotating drum, that the rotating drum rotates under the drive of the curtain, and that the rotating drum drives the speed change drum and the constant force spring box for synchronous rotation at a high speed, thus the rotating rod is rotated at a low speed by the speed change mechanism. [2] A curtain winding system with multiple constant force springs according to claim 1, characterized bythat the speed change mechanism comprises a fixed gear and a speed change tooth, wherein the fixed gear is fixedly connected to the installation bracket, and wherein the speed change tooth is connected to the rotating rod through the speed change bracket, and wherein an annular rotating toothed rail is arranged in the speed change drum, and wherein between the fixed gear and the rotating toothed rail, the speed change tooth is installed, which is connected to the fixed gear and the rotating toothed rail by the gear engagement, and wherein a first fastening groove used to fit with the rotating drum is provided on the outer side of the speed change drum. [3] A curtain winding system with multiple constant force springs according to claim 2, characterized bythat the speed change teeth are provided in a number of at least 3. [4] A curtain winding system with multiple constant force springs according to claim 2, characterized by that a rotating core of the spring is arranged in the constant force spring box, wherein an elastic element with constant force is fixedly connected to the outside of the rotating core of the spring, and wherein a rotating rod is fixedly connected to the inside of the rotating core of the spring, and wherein a second fastening groove is provided on the outside of the constant force spring box, which is used in conjunction with the rotating drum. [5] A curtain winding system with multiple constant force springs according to claim 4, characterized bythat fixed ribs are arranged inside the rotating drum along the length direction, wherein the fixed ribs are connected to the first fastening groove and the second fastening groove. [6] A curtain winding system with multiple constant force springs according to claim 4, characterized by that the cross-section of the rotating rod is D-shaped. [7] A curtain winding system with multiple constant force springs according to claim 6, characterized by that the elastic element with constant force is a spring with constant force.

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