A resistance adjustment device for cordless window blinds

Abstract

The application belongs to the technical field of indoor devices, and particularly relates to a resistance adjusting device of a pull-cord-free curtain. The resistance adjusting device is applied to a lifting type push-pull positioning curtain and comprises a cavity arranged on a frame body for fixing the curtain, a horizontal rope hole arranged on a side surface of the cavity, a vertical rope hole arranged on a bottom surface of the cavity, a rope body connected with the curtain in sequence through the horizontal rope hole and the vertical rope hole, and a recovery device connected with the other end of the rope body. A resistance unit is rotatably arranged in the cavity and used for increasing resistance of the rope body in vertical movement. A stop rod for blocking the resistance unit is further arranged in the cavity. When the curtain body is formed into a roller blind shape upward, the resistance unit of the resistance adjusting device is rotated to the stop rod, and almost no resistance is generated to the rope body. When the roller blind is unfolded into the curtain body downward, the resistance unit is rotated to the bottom end of the cavity, and the resistance of the rope body is increased. Therefore, the resistance unit can prevent the roller blind from falling to a certain extent.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of indoor devices, and particularly relates to a resistance adjusting device of a pull-rope-free curtain. BACKGROUND

[0002] A curtain is a kind of window curtain formed by weaving curtain cloth through resin processing or bamboo strips or reed rods, and capable of being rolled into a roller shape. The curtain is lifted and lowered by a pull rope or a chain. A common curtain is retracted and collected by pulling the pull rope connected to the lower end of the curtain, and the curtain is automatically lowered to be implemented by loosening the pull rope. The push-pull rope is locked or loosened by a collecting and releasing mechanism fixed to the upper rail. When people collect the curtain, the outer end of the pull rope needs to be pulled, so that the other end of the pull rope can lift the lower end of the curtain, and the curtain is retracted. This way of controlling the curtain is relatively laborious to pull the pull rope, and the pulled-out pull rope is exposed and hung down, which is too cumbersome and cannot be stored. The exposed pull rope is often entangled with other objects, and the exposed pull rope falls to the ground, which is easy to trip and even to strangle children, causing safety hazards.

[0003] Previously, the applicant proposed a lifting type push-pull positioning roller curtain (CN209855661U) without exposed pull rope, which can realize self-locking positioning of the curtain body and infinitely adjust the length of the curtain body when it is unfolded. However, the curtain body itself has a weight, and when the weight of the curtain body used is too large, the upward pulling force of the pull rope is not enough to maintain the curtain body in the form of a roller curtain, resulting in that the curtain body will fall down by itself after being stored, affecting the use.

[0004] In summary, there is a need for a device that can maintain the curtain body in the form of a roller curtain without affecting the normal use of the curtain body. SUMMARY

[0005] The application aims to provide a resistance adjusting device of a pull-rope-free curtain, when the curtain body is formed into a roller curtain shape upward, the resistance adjusting device is rotated to the stop rod, and hardly any resistance is generated to the rope body; when the roller curtain is unfolded into the curtain body downward, the resistance adjusting device is rotated to the bottom end of the cavity, and the resistance to the rope body is increased, based on which, the resistance adjusting device can prevent the roller curtain from falling to a certain extent.

[0006] The technical scheme adopted by the application to solve the above problems is: a resistance adjusting device of a pull-rope-free curtain, comprising:

[0007] a cavity arranged on a frame body for fixing a curtain, a lateral rope hole is arranged on the side of the cavity, a vertical rope hole is arranged on the bottom surface of the cavity, one end of a rope body is connected to the curtain in sequence through the lateral rope hole and the vertical rope hole, and the other end of the rope body is connected to a recovery device;

[0008] a resistance adjusting device, which is rotatably arranged in the cavity and is used for increasing the resistance generated to the rope body when the rope body moves vertically;

[0009] The cavity is further provided with a stop rod for blocking the blocking unit.

[0010] The function of the recovery device is to recover the curtain upwards by tightening the rope and to provide limited upward pulling force to limit the downward unfolding of the curtain. One specific structure of the recovery device can refer to the push-pull positioning device in CN209855661U. The blocking unit helps to strengthen the pulling force of the rope towards the recovery device and does not affect the process of the rope moving away from the recovery device.

[0011] In the prior art, the above problems are generally solved by replacing the stronger load-bearing reel bearing, or selecting lightweight curtain fabric, or designing the curtain in sections to reduce the weight of each section of the curtain, or increasing the diameter of the reel to increase the load-bearing capacity of the reel. However, the above-mentioned various ways need to modify the curtain, which is very troublesome and has poor universality, and cannot guarantee that every curtain can meet the requirements. The resistance adjusting device designed in the present application has the advantage of being suitable for being installed on various curtains, and has good universality.

[0012] In particular, the resistance adjusting device of the present application is particularly suitable for Roman curtains, which are a type of foldable window curtain, usually composed of an upper horizontal bar, curtain fabric, fabric guide rail, and a lower weight bar. Its folding form can be horizontal or vertical folding, and when folded, the curtain fabric forms flat pleats, making the curtain look more beautiful. The advantage of the Roman curtain is its beauty and practicality. It can adapt to different window shapes and sizes, while also providing good light and privacy protection. In addition, the direct upward folding form of the Roman curtain also makes it easier to clean and maintain. However, the disadvantage of the Roman curtain is that it is prone to falling downward due to its own weight after being stored upward, so the resistance adjusting device of the present application is needed to block its tendency to fall after being stored.

[0013] Further preferred technical solutions are that the resistance adjusting device further comprises a resistance adjusting unit arranged in the cavity and used for adjusting the resistance to the rope.

[0014] Further preferred technical solutions are that the cavity further comprises a rotating column groove, and the blocking unit comprises a rotating column installed in the rotating column groove, a circulating piece rotatably installed on the rotating column, a horizontal lever and a vertical lever arranged on the circulating piece.

[0015] Further preferred technical solutions are that the blocking unit further comprises a limiting rod, and the rope is located between the limiting rod and the horizontal lever and the vertical lever.

[0016] Further preferred technical solutions are that the blocking unit further comprises a stop protrusion arranged at the end of the circulating piece.

[0017] Further preferred technical solutions are characterized in that the cavity is further provided with an adjusting column groove vertically arranged between the resistance unit and the transverse rope hole; and the resistance adjusting unit comprises an adjusting column moving along the adjusting column groove.

[0018] Further preferred technical solutions are characterized in that the resistance adjusting unit further comprises an adjusting frame installed at both ends of the adjusting column, an adjusting screw hole arranged on the bottom surface of the adjusting frame, and an adjusting screw bolt screwed in the adjusting screw hole.

[0019] Further preferred technical solutions are characterized in that the cavity is further provided with a positioning column between the adjusting column and the transverse rope hole.

[0020] Further preferred technical solutions are characterized in that the cavity is further provided with an increased resistance hole located at the side of the vertical rope hole.

[0021] Further preferred technical solutions are characterized in that the resistance unit further comprises a guide surface arranged at the lower end of the stop protrusion.

[0022] In summary, the present application also includes the following advantages:

[0023] 1. The resistance adjusting device does not affect the normal use of the curtain, and gives a certain upward resistance when the curtain falls to prevent it from falling, which can just resist the falling caused by the weight of the curtain, without affecting the process of manually pulling down the curtain;

[0024] 2. The positioning column leads the rope body outwards from the transverse rope hole in a nearly horizontal manner, avoiding friction between the rope body and the inner side of the transverse rope hole;

[0025] 3. By lowering the adjusting column, the angle between the rope body and the transverse rod and the positioning column is increased, thereby increasing the friction between the rope body and each rod, so that the resistance is increased;

[0026] 4. After the rope body C is transferred to the increased resistance hole 106, the resistance of the rope body when moving downwards can be further increased. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the resistance adjusting device.

[0028] Figure 2 It is Figure 1 A schematic diagram of the view angle counterclockwise rotation.

[0029] Figure 3 It is Figure 2 A schematic diagram of the view angle inward turning.

[0030] Figure 4 It is Figure 1An exploded structural schematic view of the resistance adjusting device.

[0031] Figure 5 As Figure 4 An exploded structural schematic view along a vertical section.

[0032] Figure 6 As

[0033] Figure 7 As Figure 6 An exploded structural schematic view in which the rope body moves downward to rotate the resistance unit counterclockwise.

[0034] Figure 8 As Figure 7 An exploded structural schematic view in which the adjusting column adjusts the position downward.

[0035] Figure 9 As Figure 8 An exploded structural schematic view in which the rope body is installed in the resistance increasing hole.

[0036] Figure 10 As

[0037] Figure 11 As

[0038] Figure 12 As

[0039] In the drawings, the components represented by the respective reference numerals are as follows: window curtain A, frame B, rope body C, recovery device D, cavity 1, resistance unit 2, resistance adjusting unit 3, horizontal rope hole 101, vertical rope hole 102, stop rod 103, rotating column slot 104, positioning column 105, resistance increasing hole 106, adjusting column slot 107, rotating column 201, circulating member 202, horizontal shifting rod 203, vertical shifting rod 204, limiting rod 205, stop protrusion 206, adjusting column 301, adjusting frame 302, adjusting screw hole 303, adjusting screw 304, guide surface 206a. DETAILED DESCRIPTION

[0040] The present application will be further described in detail below in conjunction with the drawings.

[0041] The present embodiment is merely an explanation of the present application and is not a limitation of the present application. Those skilled in the art can make modifications to the present embodiment without creative contribution after reading the present specification, and the present application is protected by the patent law as long as it is within the scope of the claims.

[0042] Embodiment One

[0043] In the present embodiment, the resistance adjusting device comprises:

[0044] cavity 1, blocking unit 2, resistance adjusting unit 3; wherein:

[0045] The cavity 1 comprises a transverse rope hole 101, a vertical rope hole 102, a stop rod 103, a rotating column slot 104, a positioning column 105, and an adjusting column slot 107.

[0046] The blocking unit 2 comprises a circulating piece 202, a transverse shifting rod 203, a vertical shifting rod 204, a limiting rod 205, and a stop protrusion 206.

[0047] The resistance adjusting unit 3 comprises an adjusting column 301, an adjusting frame 302, an adjusting threaded hole 303, and an adjusting bolt 304.

[0048] Referring to Figure 1 , a structural schematic diagram of the resistance adjusting device is shown, and it can be seen that the cavity 1 is in the shape of a bathtub, a transverse rope hole 101 is arranged at the proximal end side of the cavity 1, and a U-shaped resistance adjusting unit 3 is arranged at the position of the cavity 1 on the side of the transverse rope hole 101.

[0049] Referring to Figure 2 , a schematic diagram of a counterclockwise rotation angle is shown, and it can be seen that an observation window is arranged at the other side of the cavity 1 located at the transverse rope hole 101, and the blocking unit 2 arranged in the cavity 1 relative to the other side of the transverse rope hole 101 can be seen through the observation window, and the resistance adjusting unit 3 is located between the blocking unit 2 and the transverse rope hole 101. Figure 1 Referring to

[0050] , a schematic diagram of an inward turning angle is shown, and it can be seen that a vertical rope hole 102 is arranged below the cavity 1, and a resistance increasing hole 106 with a smaller diameter is arranged on the side of the vertical rope hole 102 away from the resistance adjusting unit 3, and the resistance adjusting unit 3 is located between the vertical rope hole 102 and the transverse rope hole 101. Figure 3 Figure 2 Referring to , an exploded structural schematic diagram is shown, and each part in the figure is separated outward from the cavity 1 along the vertical direction, and the general structure of the blocking unit 2 and the resistance adjusting unit 3 and the installation position thereof in the cavity 1 can be seen.

[0051] Figure 4 Referring to Figure 1 , a schematic diagram along the vertical section is shown, and it can be seen that a plurality of column bodies are arranged in the circulating piece 202 of the blocking unit 2, the stop rod 103 and the positioning column 105 are installed in the cavity 1 through the downwardly contracted installation slot, the vertical rope hole 102 and the resistance increasing hole 106 are arranged at the middle position of the bottom surface of the cavity 1, and the transverse rope hole 101 is arranged at the middle position of the side surface of the cavity 1.

[0052] Referring to Figure 5 , a schematic diagram along the vertical section is shown, and it can be seen that a plurality of column bodies are arranged in the circulating piece 202 of the blocking unit 2, the stop rod 103 and the positioning column 105 are installed in the cavity 1 through the downwardly contracted installation slot, the vertical rope hole 102 and the resistance increasing hole 106 are arranged at the middle position of the bottom surface of the cavity 1, and the transverse rope hole 101 is arranged at the middle position of the side surface of the cavity 1. Figure 4

[0053] ​​Reference Figure 6 , shows a schematic diagram of the resistance adjusting device along the vertical section, which shows the rope C pulling out from the horizontal rope hole 101, that is, pulling towards the recovery device D. The rope C is at a relatively gentle angle between the horizontal shifting rod 203, the adjusting column 301 and the positioning column 105, that is, the pressure acting on each rod is small, and the friction acting on the rope C by each rod is also small, so when the rope C pulls out from the horizontal rope hole 101, the resistance it receives is also small.

[0054] It can also be seen in the figure that the adjusting column 301 is located between the horizontal shifting rod 203 and the positioning column 105, and the positioning column 105 is arranged in the cavity 1 at the same height position as the horizontal rope hole 101. The positioning column 105 functions to guide the rope C out from the horizontal rope hole 101 horizontally, avoiding friction between the rope C and the inner side of the horizontal rope hole 101.

[0055] It can also be seen in the figure that the stopper 103 is at a suitable height position, at which the circulating part 202 is pressed against and cannot continue to rotate, and at which the angle between the rope C and each rod is the smallest, and the resistance received by the rope C is the smallest.

[0056] Reference Figure 7 , shows a schematic diagram of the rope moving downward in Figure 6 to make the resistance unit rotate counterclockwise, which shows the rope C pulling out from the vertical rope hole 102, that is, pulling outwards from the recovery device D. Under the above movement trend of the rope C, the vertical shifting rod 204 receives downward pressure from the rope C, forcing the circulating part 202 to rotate counterclockwise along the rotating column 201, so that the height of the horizontal shifting rod 203 is raised and the height of the vertical shifting rod 204 is lowered, the angle formed by the rope C between the two is increased, and the angle of the rope C between the horizontal shifting rod 203 and the adjusting column 301 is also increased, so that the pressure acting on each rod by the rope C is also increased, and the friction acting on the rope C by each rod is also increased. Therefore, when the rope pulls out from the vertical rope hole 102, the resistance it receives will also increase.

[0057] It can also be seen in the figure that the rotating column 201 is located between the horizontal shifting rod 203 and the vertical shifting rod 204, which has the advantage that when the circulating part 202 rotates along the rotating column 201, the horizontal shifting rod 203 and the vertical shifting rod 204 must move in opposite vertical directions, and in Figure 6 , the rope C is already at the position where the resistance is the smallest, and when the circulating part 202 is rotated again, the friction between the rope C and each rod will inevitably be increased.

[0058] The figure also shows the stop protrusion 206, when the circulating member 202 rotates to a certain extent, the stop protrusion 206 abuts against the bottom surface inside the cavity 1, so that the circulating member 202 stops rotating.

[0059] Reference Figure 8 , shows Figure 7 The schematic diagram of the adjusting column adjusting the downward position, it can be seen that the adjusting screw 304 is screwed in the adjusting threaded hole 303, and the deeper the screwing, the longer the length of the adjusting screw 304 between the adjusting frame 302 and the bottom surface of the cavity, so that the adjusting column 301 fixed with the adjusting frame 302 moves downward, when the adjusting column 301 moves downward, the angle of the rope C between the adjusting column 301 and the horizontal pulling rod 203 and the positioning column 105 increases, thereby increasing the friction between the rope C and each rod, so that the resistance increases, which not only affects the movement of the rope C along the vertical rope hole 102 in the outward vertical direction, but also affects the movement of the rope C along the horizontal rope hole 101 in the outward horizontal direction.

[0060] Reference Figure 10 , shows the structural schematic diagram of the resistance adjusting unit, in which the resistance adjusting unit is along the vertical section. The figure shows the three-dimensional structure of the resistance adjusting unit 2, it can be seen that each horizontal pulling rod 203, vertical pulling rod 204 and limiting rod 205 are fixedly arranged on the inner side surface of the circulating member 202, and the rotating column 201 is rotatably arranged on the circulating member 202.

[0061] Reference Figure 11 , shows the structural schematic diagram of the resistance adjusting unit. The resistance adjusting unit 3 is in the shape of U, the adjusting column 301 is arranged between the two top ends of the U, and the adjusting threaded hole 303 is arranged at the central position of the low end of the U.

[0062] Reference Figure 12 , shows the schematic diagram of the resistance adjusting device applied to the window curtain. It can be seen that the cavity 1 is arranged on the frame B for fixing the window curtain A, and in combination with the above figure, the lateral surface of the cavity 1 is provided with the horizontal rope hole 101, and the bottom surface is provided with the vertical rope hole 102, the rope C is connected with the window curtain A in sequence through the horizontal rope hole 101 and the vertical rope hole 102, and the other end of the rope C is connected with the recovery device D. In addition, the figure shows that the window curtain A is in the unfolded state, when installed, the cavity 1 is located on both sides of the recovery device D, and the recovery device D and the cavity 1 are located on the frame B, when the rope C is pulled upward, the window curtain A is upwardly stored; when the window curtain A that has been stored is unfolded downward, the rope C is released downward.

[0063] In summary, the use method of the resistance adjusting device is as follows:

[0064] S01. The cavity 1 is installed on the frame B for fixing the curtain A, and the blocking unit 2, the resistance adjusting unit 3, the stop rod 103 and the positioning column 105 are installed in the respective installation slots in the cavity 1 in sequence.

[0065] S02. One end of the rope C is connected to the recycling device D, and the other end is inserted into the cavity 1 from the horizontal rope hole 101, and then passes through above the positioning column 105, below the adjusting column 301, above the horizontal shifting rod 203, below the limiting rod 205, above the vertical shifting rod 204, and then is connected to the curtain A from the vertical rope hole 102.

[0066] Example Two:

[0067] In this embodiment, the resistance adjusting device is basically the same as that in Example One, and the difference is that the cavity 1 further comprises a resistance increasing hole 106, and the stop protrusion 206 is provided with a guide surface 206a.

[0068] Reference Figure 9 , shows Figure 8 the schematic view of the rope C installed in the resistance increasing hole. When the friction between the rope C and the respective rod is not enough to resist the gravity of the curtain A, the rope C can be transferred to the resistance increasing hole 106. When the rope C moves downward along the resistance increasing hole 106, the downward force is still applied to the vertical shifting rod 204, so that the circulating piece 202 rotates counterclockwise. At this time, the stop protrusion 206 is located near the hole of the resistance increasing hole 106, and just clamps the rope C. With the continuous downward movement of the rope C, the stop protrusion 206 keeps clamping the rope C. In addition, the contact surface between the stop protrusion 206 and the rope C is provided with a relatively smooth guide surface 206a, so as to avoid that the stop protrusion 206 directly clamps the rope C. The above design can be used for the curtain A with larger self-weight, so as to avoid that the curtain A automatically falls when it is used, and plays a self-locking effect.

[0069] In summary, the method for using the resistance adjusting device is as follows:

[0070] S11. The cavity 1 is installed on the frame B for fixing the curtain A, and the blocking unit 2, the resistance adjusting unit 3, the stop rod 103 and the positioning column 105 are installed in the respective installation slots in the cavity 1 in sequence.

[0071] S12. One end of the rope C is connected to the recycling device D, and the other end is inserted into the cavity 1 from the horizontal rope hole 101, and then passes through above the positioning column 105, below the adjusting column 301, above the horizontal shifting rod 203, below the limiting rod 205, above the vertical shifting rod 204, and then is connected to the curtain A from the resistance increasing hole 106.

[0072] Furthermore, identical or similar components shown in the drawings are often denoted using identical or similar reference numerals. The drawings are presented in a simplified form and are not drawn to precise scale. Directional terms, such as top, bottom, left, right, up, down, over, under, above, below, behind, and in front, are used to provide some orientation to the components being described for purposes of illustration and convenience only and do not limit the present disclosure to any particular orientation of the components described.

Claims

1. A resistance adjustment device for a cordless curtain, characterized in that, include: A cavity (1) is set on a frame (B) for fixing a curtain (A). The cavity (1) has a horizontal rope hole (101) on its side and a vertical rope hole (102) on its bottom. One end of a rope (C) passes through the horizontal rope hole (101) and the vertical rope hole (102) in sequence and is connected to the curtain (A). The other end of the rope (C) is connected to a recycling device (D). The blocking unit (2) is rotatably disposed in the cavity (1) and is used to increase the resistance encountered by the rope (C) when it moves vertically; The cavity (1) is also provided with a stop rod (103) for blocking the blocking unit (2); it also includes a resistance adjustment unit (3), which is disposed in the cavity (1) and is used to adjust the resistance to the rope (C); the cavity (1) is also provided with a rotating column groove (104); the blocking unit (2) includes a rotating column (201) installed in the rotating column groove (104), a circulation component (202) rotatably mounted on the rotating column (201), a transverse lever (203) disposed on the circulation component (202), and A vertical lever (204); the cavity (1) is also provided with an adjustment column groove (107) vertically arranged between the resistance unit (2) and the horizontal rope hole (101); the resistance adjustment unit (3) includes an adjustment column (301) that moves along the adjustment column groove (107); the resistance adjustment unit (3) also includes adjustment frames (302) installed at both ends of the adjustment column (301), adjustment threaded holes (303) provided on the bottom surface of the adjustment frames (302), and adjustment bolts (304) screwed into the adjustment threaded holes (303); The blocking unit (2) also includes a stop protrusion (206) disposed at the end of the circulation member (202). The cavity (1) is also provided with a resistance-increasing hole (106) located on the side of the vertical rope hole (102). The blocking unit (2) also includes a guide surface (206a) disposed at the lower end of the stop protrusion (206). The stop protrusion (206) abuts against the opening of the resistance hole (106) and clamps the rope (C). As the rope (C) continues to move downward, the stop protrusion (206) remains in the state of clamping the rope (C).

2. The resistance adjustment device for a cordless curtain according to claim 1, characterized in that, The blocking unit (2) also includes a limiting rod (205), and the rope (C) is located between the limiting rod (205) and the horizontal lever (203) and the vertical lever (204).

3. The resistance adjustment device for a cordless curtain according to claim 1, characterized in that, The cavity (1) is also provided with a positioning post (105) located between the adjustment post (301) and the transverse rope hole (101).

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