Curtain rope resistance adjusting structure and curtain

Abstract

The utility model relates to a window curtain technical field discloses a window curtain cord resistance adjusting structure and window curtain, including reel rope axle assembly, adjusting block and window curtain cord, reel rope axle assembly includes shell, rotation axis and axle sleeve, axle sleeve is along the circumferential direction of itself and is installed in the shell, and axle sleeve is set up on rotation axis and rotates synchronously with rotation axis, and the upper end of window curtain cord is connected with axle sleeve, adjusting block is along the horizontal direction or close to horizontal direction and is arranged in the downside of shell, is provided with first through -hole for the window curtain cord of setting up in shell, is provided with second through -hole for the window curtain cord of setting up in adjusting block. The utility model is provided with adjusting block, and the horizontal distance of first through -hole and second through -hole is adjusted through sliding adjusting block, and then the friction size of window curtain cord is adjusted, and the convenient adjustment is adjusted to the friction resistance of window curtain cord according to different weight window curtain cloth, to be applicable to different weight window curtain cloth, and positioning is more accurate when adjusting window curtain cloth height, and the use experience is good.

Description

Technical Field

[0001] This utility model relates to the field of curtain technology, specifically to a curtain rope resistance adjustment structure and a curtain. Background Technology

[0002] Roman blinds are a common type of curtain, consisting of multiple parallel strips of fabric. When the curtain cord is pulled, the fabric strips can be folded into parallel layers, thus achieving the effect of blocking sunlight and protecting privacy. Existing curtain products, such as Roman blinds, include an upper beam support, a lower beam support, curtain cords, curtain fabric, and a cord reel. The cord reel is located on the upper beam support. Roman blinds are divided into manual and electric types, and correspondingly, cord reels are divided into manual and electric types. The manual cord reel includes a housing, a spring, and a reel shaft. One end of the curtain cord is connected to the reel shaft, and the other end is connected to a cord buckle on the lower beam support. The spring's elasticity acts on the upper end of the curtain cord, while the total weight of the lower beam support and curtain fabric acts on the lower end of the curtain cord. The tension of the spring balances the total weight of the lower beam support and curtain fabric. When adjusting the height of the curtain fabric, the user simply lifts or pulls the lower beam support up or down to the desired height and then releases it to stop. Existing electric Roman blinds generally use a motor to drive the reel shaft to rotate, thereby raising or lowering the curtain cord to adjust the height of the curtain fabric.

[0003] Some existing manual Roman blinds are usually equipped with friction braking devices (such as gear buckles, dampers, etc.) to compensate for fluctuations in the spring force, thereby assisting in the suspension of the curtain fabric. However, the friction force provided by the existing friction braking devices is not easy to adjust. When the curtain fabric is large or heavy, the friction force provided by the friction braking device is often insufficient, which causes the curtain fabric to slide down a distance after being released from the hand, and it cannot be immediately suspended at the height position (i.e., the release position) desired by the user. This makes it difficult to accurately position the curtain fabric and results in a poor user experience. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model provides a curtain cord resistance adjustment structure, comprising a cord winding shaft assembly, an adjusting block, and a curtain cord. The cord winding shaft assembly includes a housing, a rotating shaft, and a bushing. The bushing is rotatably mounted within the housing along its circumferential direction and is fitted onto the rotating shaft, rotating synchronously with it. The upper end of the curtain cord is connected to the bushing, and the curtain cord is wound or released by rotating the bushing. The adjusting block is slidably disposed on the lower side of the housing along a horizontal or near-horizontal direction. The housing has a first through hole for the curtain cord to pass through, and the adjusting block has a second through hole for the curtain cord to pass through. The adjusting block has an elastically deformable portion with positioning protrusions. The housing has multiple positioning grooves corresponding to the positioning protrusions, and these positioning grooves are distributed along the sliding direction of the adjusting block.

[0005] During adjustment, an external force is used to drive the deformable part to undergo elastic deformation, thereby causing the positioning protrusion to disengage from the positioning groove. An external force is used to slide the adjusting block to adjust the horizontal distance between the first through hole and the second through hole, thereby adjusting the friction between the curtain rope and the inner wall of the first through hole, and simultaneously adjusting the friction between the curtain rope and the inner wall of the second through hole. After adjustment, the external force is removed, and the deformable part recovers its deformation under its own elasticity, so that the positioning protrusion engages and is positioned with the corresponding positioning groove.

[0006] Optionally, the outer shell is provided with a first wear-resistant component, the adjusting block is provided with a second wear-resistant component, the first through hole is formed on the first wear-resistant component, the second through hole is formed on the second wear-resistant component, and both the first through hole and the second through hole are arranged to pass through in the vertical direction.

[0007] Optionally, the first wear-resistant part is provided with a first limiting flange on its upper part, and the second wear-resistant part is provided with a second limiting flange on its upper part; during installation, the first limiting flange abuts against the outer shell for limiting, and the second limiting flange abuts against the adjusting block for limiting.

[0008] Optionally, the outer casing is provided with a first mounting groove for mounting the first wear-resistant part. The inner wall of the first mounting groove is circumferentially distributed with a plurality of first protrusions for tightly fitting and abutting against the first wear-resistant part. The upper end of the first protrusion is provided with a first guide slope to facilitate the first wear-resistant part being installed into the first mounting groove. The adjusting block is provided with a second mounting groove for mounting the second wear-resistant part. The inner wall of the second mounting groove is circumferentially distributed with second protrusions for tightly fitting and abutting against the second wear-resistant part. The upper end of the second protrusion is provided with a second guide slope to facilitate the second wear-resistant part being installed into the second mounting groove.

[0009] Optionally, both the first wear-resistant component and the second wear-resistant component are made of ceramic material.

[0010] Optionally, the deformable part is an elastic strip capable of elastic bending. Two deformable parts are symmetrically arranged, and a deformation space is provided between the two deformable parts for the deformable parts to bend and deform. A handle block is integrally provided on the lower side of the deformable part. During adjustment, the handle block is driven by external force to drive the deformable part to bend elastically.

[0011] Optionally, the curtain cord resistance adjustment structure further includes an upper beam support, with the outer casing disposed on the lower side of the upper beam support. A cord winder connected to the rotating shaft is disposed on the lower side of the upper beam support. The cord winder contains a rotating cylinder and a coil spring. The rotating cylinder is sleeved on the rotating shaft and rotates synchronously with the rotating shaft. The pull-out end of the coil spring is connected to the rotating cylinder. A first rotating column and a second rotating column are respectively disposed at both ends of the bushing. The outer casing is provided with a first insertion hole corresponding to the first rotating column and a second insertion hole corresponding to the second rotating column. An elastically deformable mounting plate is disposed on the outer casing. The second insertion hole is disposed on the mounting plate. The mounting plate is provided with a third guide slope to facilitate the insertion of the second rotating column into the second insertion hole.

[0012] Optionally, a sliding groove is provided on the lower side of the housing, and a slider is provided on the adjusting block to slide in cooperation with the sliding groove. An opening is provided at the side end of the sliding groove, and the slider slides into the sliding groove from the opening.

[0013] Optionally, the adjusting block is detachably provided with a bolt. After the adjusting block is adjusted, the bolt is screwed in by external force so that one end of the bolt abuts against the outer shell to limit the relative sliding between the adjusting block and the outer shell. The outer shell is provided with a mounting strip, and the positioning groove is provided on the mounting strip. The adjusting block is provided with a limiting protrusion for abutting against and limiting the mounting strip. The limiting protrusion is provided with a fourth guide slope. When the second through hole is located directly below the first through hole, the limiting protrusion abuts against the mounting strip for limiting.

[0014] Compared to existing technologies, the curtain cord resistance adjustment structure of this utility model features an adjustment block. The horizontal distance between the first and second through holes is adjusted by sliding the adjustment block, thereby adjusting the friction force on the curtain cord. This adjustment is convenient, and the friction resistance can be adjusted according to the weight of the curtain fabric to suit different weights. Adjusting the curtain height is more accurate, resulting in a better user experience. By incorporating first and second wear-resistant parts that rub against the curtain cord, direct friction between the outer casing and the adjustment block and the curtain cord is avoided, preventing damage to the outer casing and adjustment block due to excessive wear and extending their service life. A detachable bolt is installed on the adjustment block to prevent accidental slippage of the adjustment block from the positioning groove due to excessive curtain weight or dulling / deformation of the positioning teeth, ensuring greater reliability.

[0015] In addition, this utility model also provides a curtain, including the above-mentioned curtain rope resistance adjustment structure. This curtain also has the same beneficial effects of the above-mentioned curtain rope resistance adjustment structure, which will not be described in detail here. Attached Figure Description

[0016] Figure 1 This is a perspective view of the curtain rope resistance adjustment structure of this utility model;

[0017] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0018] Figure 3 This is a schematic diagram of the curtain rope resistance adjustment structure winding shaft assembly of this utility model;

[0019] Figure 4 This is a cross-sectional view of the curtain rope resistance adjustment structure winding shaft assembly of this utility model;

[0020] Figure 5 for Figure 4 Enlarged view of section B;

[0021] Figure 6 This is a schematic diagram of the outer shell of the curtain cord resistance adjustment structure of this utility model. Figure 1 ;

[0022] Figure 7 for Figure 6 Enlarged view of section C;

[0023] Figure 8 This is a schematic diagram of the outer shell of the curtain cord resistance adjustment structure of this utility model. Figure 2 ;

[0024] Figure 9 This is a schematic diagram of the adjusting block of the curtain rope resistance adjusting structure of this utility model. Figure 1 ;

[0025] Figure 10 This is a schematic diagram of the adjusting block of the curtain rope resistance adjusting structure of this utility model. Figure 2 ;

[0026] Figure 11 This is an exploded view of the curtain rope resistance adjustment structure winder of this utility model;

[0027] Figure 12 This is a schematic diagram of the second embodiment of the curtain rope resistance adjustment structure of this utility model;

[0028] The component names corresponding to the various reference numerals in the figure are as follows: 1 is the upper crossbeam bracket, 21 is the outer shell, 210 is the first through hole, 211 is the positioning groove, 212 is the first mounting groove, 213 is the first protrusion, 214 is the first inclined surface, 215 is the first insertion hole, 216 is the second insertion hole, 217 is the mounting plate, 218 is the third guide inclined surface, 219 is the mounting strip, 22 is the rotating shaft, 23 is the bushing, 231 is the first rotating column, 232 is the second rotating column, 3 is the adjusting block, and 31 is the second through hole. 32 is the deformation part, 320 is the deformation space, 321 is the positioning tooth, 322 is the handle block, 33 is the second mounting groove, 331 is the second protrusion, 332 is the second guide slope, 34 is the slider, 35 is the limiting protrusion, 351 is the fourth guide slope, 4 is the curtain rope, 5 is the first wear-resistant part, 51 is the first limiting flange, 6 is the second wear-resistant part, 61 is the second limiting flange, 7 is the rope winder, 71 is the rotating cylinder, 72 is the coil spring, 8 is the slide groove, 81 is the opening, 9 is the bolt, and 10 is the motor. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0032] Example 1:

[0033] See Figures 1-11Embodiment 1 of this utility model provides a curtain cord resistance adjustment structure, including a cord winding shaft assembly, an adjustment block 3, and a curtain cord 4. The cord winding shaft assembly includes a housing 21, a rotating shaft 22, and a bushing 23. The bushing 23 is rotatably installed inside the housing 21 along its own circumferential direction. The bushing 23 is sleeved on the rotating shaft 22 and rotates synchronously with the rotating shaft 22. The upper end of the curtain cord 4 is connected to the bushing 23. The curtain cord 4 is wound or released by rotating the bushing 23. The adjustment block 3 is slidably disposed on the lower side of the housing 21 along the horizontal or near-horizontal direction. The housing 21 is provided with a first through hole 210 for threading the curtain cord 4. The adjustment block 3 is provided with a second through hole 31 for threading the curtain cord 4. The adjustment block 3 is provided with an elastically deformable deformation part 32. The deformation part 32 is provided with a positioning protrusion 321. The housing 21 is provided with a plurality of positioning grooves 211 corresponding to the positioning protrusions 321. The plurality of positioning grooves 211 are distributed along the sliding direction of the adjustment block 3.

[0034] During adjustment, an external force drives the deformation part 32 to undergo elastic deformation, causing the positioning protrusion 321 to disengage from the positioning groove 211. An external force is used to slide the adjusting block 3, adjusting the horizontal distance between the first through hole 210 and the second through hole 31, thereby adjusting the friction between the curtain rope 4 and the inner wall of the first through hole 210, and simultaneously adjusting the friction between the curtain rope 4 and the inner wall of the second through hole 31. After adjustment, the external force is removed, and the deformation part 32 recovers its deformation under its own elasticity, causing the positioning protrusion 321 to engage and position with the corresponding positioning groove 211. The greater the horizontal distance between the first through hole 210 and the second through hole 31, the more inclined the curtain rope 4 is relative to the plumb line between the first through hole 210 and the second through hole 31. The greater the frictional resistance to the curtain cord 4, the greater the frictional resistance to the curtain cord 4. Conversely, the smaller the horizontal distance between the first through hole 210 and the second through hole 31, the smaller the frictional resistance to the curtain cord 4. When the second through hole 31 is located directly below the first through hole 210, that is, when the horizontal distance between the first through hole 210 and the second through hole 31 approaches zero, the curtain cord 4 between the first through hole 210 and the second through hole 31 is in a vertical or nearly vertical state. At this time, the frictional resistance to the curtain cord 4 is minimal on the inner walls of the first through hole 210 and the second through hole 31. In this embodiment, two curtain cords 4 are provided, and two corresponding winding shaft assemblies and adjusting blocks 3 are also provided. The frictional resistance of the corresponding curtain cord 4 is adjusted by the two adjusting blocks 3 respectively.

[0035] See Figure 4 At this time, the second through hole 31 is located directly below the first through hole 210. At this time, the frictional resistance to the curtain cord is at its minimum. When the adjusting block 3 is slid horizontally to the right, the frictional resistance to the curtain cord increases. The more the adjusting block 3 is adjusted to the right, the greater the frictional resistance to the curtain cord becomes.

[0036] See Figures 1-5The outer casing 21 is provided with a first wear-resistant part 5, and the adjusting block 3 is provided with a second wear-resistant part 6. A first through hole 210 is formed on the first wear-resistant part 5, and a second through hole 31 is formed on the second wear-resistant part 6. Both the first through hole 210 and the second through hole 31 are vertically connected. By setting the first wear-resistant part 5 and the second wear-resistant part 6 to rub against the curtain cord, the outer casing 21 and the adjusting block 3 are prevented from directly rubbing against the curtain cord, thus preventing damage to the outer casing 21 and the adjusting block 3 due to excessive wear and extending their service life. It is worth noting that if the outer casing 21 and the adjusting block 3 are made of wear-resistant material, the degree of wear can also be reduced, but the production cost is higher. By setting wear-resistant parts on the outer casing 21 and the adjusting block 3 to reduce wear, the structural design is more reasonable and the cost is lower, which is the preferred solution.

[0037] See Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9 The first wear-resistant part 5 has a first limiting flange 51 on its upper part, and the second wear-resistant part 6 has a second limiting flange 61 on its upper part. During installation, the first limiting flange 51 abuts against the outer shell 21 for limiting, and the second limiting flange 61 abuts against the adjusting block 3 for limiting. After installation, the first wear-resistant part 5 and the second wear-resistant part 6 are not prone to displacement, and the structure is stable. The outer shell 21 has a first mounting groove 212 for installing the first wear-resistant part 5. The inner wall of the first mounting groove 212 has a plurality of first protrusions 213 arranged in a ring for tightly fitting and abutting against the first wear-resistant part 5. The upper end of the first protrusions 213 has a first guide slope 214 to facilitate the insertion of the first wear-resistant part 5 into the first mounting groove 212, reducing the assembly difficulty. During installation, the first wear-resistant part 5 is inserted into the first mounting groove 212 from top to bottom. The first wear-resistant part 5 is easy to assemble, and the structure is stable after assembly. The adjusting block 3 has a second mounting groove 33 for installing the second wear-resistant part 6. The inner wall is circumferentially distributed with second protrusions 331 for tight fitting and abutting against the second wear-resistant part 6. The upper end of the second protrusions 331 is provided with a second guide slope 332 to facilitate the insertion of the second wear-resistant part 6 into the second mounting groove 33, reducing assembly difficulty. During installation, the second wear-resistant part 6 is inserted into the second mounting groove 33 from top to bottom. The second wear-resistant part 6 is easy to assemble and the structure is stable after assembly. The first wear-resistant part 5 and the second wear-resistant part 6 are both made of ceramic material, which has good wear resistance and is more durable. The first wear-resistant part 5 and the second wear-resistant part 6 can also be made of other plastic or metal materials with good wear resistance. Since the first wear-resistant part 5 and the second wear-resistant part 6 need to provide resistance by friction with the curtain cord, the surfaces of the first wear-resistant part 5 and the second wear-resistant part 6 can also be sanded or otherwise treated to increase the surface roughness, so as to increase the friction coefficient and improve the resistance effect. The inner wall of the first through hole 210 includes the opening of the first through hole 210, and the inner wall of the second through hole 31 includes the opening of the second through hole 31.

[0038] See Figure 3 , Figure 4 and Figure 9 In this embodiment, the deformable part 32 is an elastic strip capable of elastic bending. The deformable part 32 can also be set as other structures capable of elastic bending, such as elastic plates or elastic sheets. Two deformable parts 32 are symmetrically arranged, and a deformation space 320 is provided between the two deformable parts 32 for the deformable parts 32 to bend and deform. A handle block 322 is integrally provided on the lower side of the deformable part 32. During adjustment, the handle block 322 is driven by external force to drive the deformable part 32 to bend elastically. Specifically, during adjustment, the index finger and thumb of the hand are used to pinch the two handle blocks 322 respectively, and the action of pinching is performed towards the side of the deformation space 320 to drive the two deformable parts 32 to bend towards the side of the deformation space 320, so that the positioning protrusion 321 disengages from the corresponding positioning groove 211. At this time, the handle block 322 drives the adjusting block 3 to slide to the desired position. After releasing the handle, the deformable part 32 restores its elastic deformation, so that the positioning protrusion 321 re-engages into the positioning groove 211 corresponding to the current position for positioning, which is convenient for adjustment.

[0039] See Figure 1 , Figure 2 and Figure 11 The curtain cord resistance adjustment structure also includes an upper beam bracket 1. The outer casing 21 is fixed to the lower side of the upper beam bracket 1 by bolts. A cord winder 7 connected to the rotating shaft 22 is fixedly installed on the lower side of the upper beam bracket 1. The cord winder 7 contains a rotating cylinder 71 and a coil spring 72. The rotating cylinder 71 is sleeved on the rotating shaft 22 and rotates synchronously with the rotating shaft 22. The pull-out end of the coil spring 72 is connected to the rotating cylinder 71. The weight of the curtain fabric is balanced by the combined force of the spring force of the coil spring 72, the friction between the first wear-resistant part and the curtain cord, and the friction between the second wear-resistant part and the curtain cord. The balancing effect is good, and the curtain fabric is not easy to shift after the height is adjusted. The positioning is more accurate and the user experience is better. The two ends of the bushing 23 are respectively provided with a first rotating column 231 and a second rotating column 232. The outer casing 21 is provided with a first insertion hole 215 corresponding to the first rotating column 231 and a second insertion hole 216 corresponding to the second rotating column 232. The outer casing 21 is provided with an elastically deformable mounting plate 217. The second insertion hole 216 is provided on the mounting plate 217. The mounting plate 217 is provided with a third guide slope 218 to facilitate the insertion of the second rotating column 232 into the second insertion hole 216, reducing the assembly difficulty. When installing the bushing 23, the first rotating column 231 is first rotated and inserted into the first insertion hole 215. Then, the second rotating column 232 pushes the mounting plate 217 to bend the mounting plate 217 so that the second rotating column 232 can be smoothly installed into the second insertion hole 216. After installation, the mounting plate 217 returns to its elastic deformation, making assembly convenient.

[0040] See Figure 4 , Figure 6 , Figure 7 and Figure 10 The lower side of the outer shell 21 is provided with a sliding groove 8, and the adjusting block 3 is provided with a slider 34 that slides in cooperation with the sliding groove 8, so that the adjusting block 3 slides smoothly. The side end of the sliding groove 8 is provided with an opening 81, and the slider 34 slides into the sliding groove 8 from the opening 81, making the adjusting block 3 easy to assemble.

[0041] See Figure 3 , Figure 4 and Figure 10 The adjusting block 3 is detachably equipped with a bolt 9. After the adjusting block 3 is adjusted, the bolt 9 is screwed in by external force so that one end of the bolt 9 abuts against the outer shell 21. In this embodiment, the upper end of the bolt 9 abuts against the outer shell 21 to limit the relative sliding between the adjusting block 3 and the outer shell 21. This prevents the adjusting block 3 from accidentally slipping out of the positioning groove 211 due to factors such as excessive weight of the curtain or dulling and deformation of the positioning protrusion 321 during use, making it more reliable. When adjustment is needed, first loosen the bolt 9, and then press the two bolts. The handle block 322 can drive the adjusting block 3 to slide; the outer shell 21 is provided with an installation strip 219, the positioning groove 211 is provided on the installation strip 219, the adjusting block 3 is provided with a limiting protrusion 35 for abutting against the installation strip 219 and limiting the position, the limiting protrusion 35 is provided with a fourth guide slope 351 for easy insertion of the adjusting block 3, when the second through hole 31 is located directly below the first through hole 210, which is the initial position, the limiting protrusion 35 abuts against the installation strip 219 to limit the position, so as to prevent the adjusting block 3 from sliding directly out of the outer shell 21 and falling off.

[0042] Example 2:

[0043] See Figure 12 The difference between this second embodiment and the first embodiment is that the first embodiment describes the application of the curtain rope resistance adjustment structure to a manual Roman blind, while this second embodiment provides a solution for applying the curtain rope resistance adjustment structure to an electric Roman blind. Specifically, in this second embodiment, the rotating shaft 22 is driven to rotate by a motor 10 with a self-locking function. By rotating the motor 10 in both directions, the curtain rope is wound up or unwound, thereby adjusting the height of the curtain fabric. In this second embodiment, it is only necessary to slide the adjusting block 3 so that the second through hole 31 is located directly below the first through hole 210. At this time, when the motor 10 winds up the curtain rope, the resistance of the first wear-resistant part and the second wear-resistant part to the curtain rope is adjusted to the minimum, avoiding increasing the power consumption of the motor, and the application range is wide.

[0044] The curtain cord resistance adjustment structure of this utility model is equipped with an adjustment block. By sliding the adjustment block, the horizontal distance between the first and second through holes can be adjusted, thereby adjusting the friction force on the curtain cord. The adjustment is convenient, and the friction resistance on the curtain cord can be adjusted according to the weight of the curtain fabric to suit different weights of curtain fabrics. This makes the positioning more accurate when adjusting the height of the curtain fabric and provides a better user experience. By setting the first and second wear-resistant parts to rub against the curtain cord, the direct friction between the outer shell and the adjustment block and the curtain cord is avoided, preventing damage to the outer shell and the adjustment block due to excessive wear and extending their service life. The adjustment block is detachably equipped with bolts to prevent the adjustment block from accidentally slipping out of the positioning groove due to factors such as excessive curtain weight or dulling and deformation of the positioning protrusions during use, making the use more reliable.

[0045] In addition, this utility model also provides a curtain, including the above-mentioned curtain rope resistance adjustment structure. This curtain also has the same beneficial effects of the above-mentioned curtain rope resistance adjustment structure, which will not be described in detail here.

[0046] In the description of this disclosure, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0047] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0049] In this disclosure, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first feature or in indirect contact with the first feature through an intermediate medium.

[0050] It should be noted that when a component is described as being "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is described as being "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A curtain cord resistance adjustment structure, characterized in that, The system includes a cord reel assembly, an adjusting block (3), and a curtain cord (4). The cord reel assembly includes a housing (21), a rotating shaft (22), and a bushing (23). The bushing (23) is rotatably mounted inside the housing (21) along its circumferential direction. The bushing (23) is fitted onto the rotating shaft (22) and rotates synchronously with it. The upper end of the curtain cord (4) is connected to the bushing (23). The adjusting block (3) is slidably disposed on the lower side of the housing (21) in a horizontal or near-horizontal direction. The outer shell (21) is provided with a first through hole (210) for threading the curtain cord (4), the adjusting block (3) is provided with a second through hole (31) for threading the curtain cord (4), the adjusting block (3) is provided with an elastically deformable part (32), the deformable part (32) is provided with a positioning protrusion (321), the outer shell (21) is provided with a plurality of positioning grooves (211) corresponding to the positioning protrusion (321), and the plurality of positioning grooves (211) are distributed along the sliding direction of the adjusting block (3).

2. The curtain cord resistance adjustment structure according to claim 1, characterized in that, The outer shell (21) is provided with a first wear-resistant component (5), and the adjusting block (3) is provided with a second wear-resistant component (6). The first through hole (210) is formed on the first wear-resistant component (5), and the second through hole (31) is formed on the second wear-resistant component (6). The first through hole (210) and the second through hole (31) are both arranged to pass through each other in the vertical direction.

3. The curtain cord resistance adjustment structure according to claim 2, characterized in that, The first wear-resistant part (5) is provided with a first limiting flange (51) on its upper part, and the second wear-resistant part (6) is provided with a second limiting flange (61) on its upper part. During installation, the first limiting flange (51) abuts against the outer shell (21) for limiting, and the second limiting flange (61) abuts against the adjusting block (3) for limiting.

4. The curtain cord resistance adjustment structure according to claim 2, characterized in that, The outer shell (21) is provided with a first mounting groove (212) for mounting the first wear-resistant part (5). The inner wall of the first mounting groove (212) is provided with a plurality of first protrusions (213) for tightly fitting and abutting against the first wear-resistant part (5). The upper end of the first protrusion (213) is provided with a first guide slope (214) to facilitate the first wear-resistant part (5) to be installed into the first mounting groove (212). The adjusting block (3) is provided with a second mounting groove (33) for mounting the second wear-resistant part (6). The inner wall of the second mounting groove (33) is provided with a second protrusion (331) for tightly fitting and abutting against the second wear-resistant part (6). The upper end of the second protrusion (331) is provided with a second guide slope (332) to facilitate the second wear-resistant part (6) to be installed into the second mounting groove (33).

5. The curtain cord resistance adjustment structure according to claim 1, characterized in that, The deformable part (32) is an elastic strip that can bend elastically. There are two deformable parts (32) symmetrically arranged. A deformation space (320) is provided between the two deformable parts (32) for the deformable parts (32) to bend and deform. A handle block (322) is integrally provided on the lower side of the deformable part (32). When adjusting, the handle block (322) is driven by external force to drive the deformable part (32) to bend elastically.

6. The curtain cord resistance adjustment structure according to claim 1, characterized in that, It also includes an upper crossbeam support (1), the outer shell (21) is disposed on the lower side of the upper crossbeam support (1), and a rope winder (7) connected to the rotating shaft (22) is disposed on the lower side of the upper crossbeam support (1). A rotating cylinder (71) and a coil spring (72) are disposed inside the rope winder (7). The rotating cylinder (71) is sleeved on the rotating shaft (22) and rotates synchronously with the rotating shaft (22). The pull-out end of the coil spring (72) is connected to the rotating cylinder (71).

7. The curtain cord resistance adjustment structure according to claim 1, characterized in that, The bushing (23) has a first rotating column (231) and a second rotating column (232) at its two ends respectively. The outer shell (21) has a first insertion hole (215) that is inserted into the first rotating column (231) and a second insertion hole (216) that is inserted into the second rotating column (232). The outer shell (21) has an elastically deformable mounting plate (217). The second insertion hole (216) is located on the mounting plate (217). The mounting plate (217) has a third guide slope (218) that facilitates the insertion of the second rotating column (232) into the second insertion hole (216).

8. The curtain cord resistance adjustment structure according to claim 1, characterized in that, The lower side of the outer shell (21) is provided with a sliding groove (8), and the adjusting block (3) is provided with a slider (34) that slides in cooperation with the sliding groove (8). The side end of the sliding groove (8) is provided with an opening (81), and the slider (34) slides into the sliding groove (8) from the opening (81).

9. The curtain cord resistance adjustment structure according to claim 1, characterized in that, The adjusting block (3) is detachably provided with a bolt (9). After the adjusting block (3) is adjusted, the bolt (9) is screwed in by external force so that one end of the bolt (9) abuts against the outer shell (21) to limit the relative sliding between the adjusting block (3) and the outer shell (21). The outer shell (21) is provided with an installation strip (219). The positioning groove (211) is provided on the installation strip (219). The adjusting block (3) is provided with a limiting protrusion (35) for abutting against the installation strip (219). The limiting protrusion (35) is provided with a fourth guide slope (351). When the second through hole (31) is located directly below the first through hole (210), the limiting protrusion (35) abuts against the installation strip (219) for limiting.

10. A curtain, characterized in that, Includes the curtain cord resistance adjustment structure as described in any one of claims 1-9.

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