Roller blind and winding tube mounting device therefor

Abstract

Provided in the embodiments of the present application are a roller blind and a winding tube mounting device therefor. The device comprises: a bracket, on which a pivoting portion is provided; a support bushing, which is configured to be inserted and fixed to one end of a winding tube, wherein an accommodating cavity, which is provided with an opening at the end thereof close to the bracket, is formed inside the support bushing, a threaded connector is provided at the end of the accommodating cavity away from the opening, and a stop portion is formed between the threaded connector and the opening; a shaft rod, which is correspondingly connected to the bracket and the support bushing, wherein one end of the shaft rod serves as a pivoting end to pivot to the pivoting portion of the bracket, the other end of the shaft rod serves as a threaded end, is inserted into the accommodating cavity of the support bushing via the opening and is threadedly connected to the threaded connector, the pivoting end being provided with an abutment platform, which correspondingly abuts against and is positioned on the surface of the side of the bracket facing the support bushing, and the pivoting end being provided with a driving portion, which is configured to drive the shaft rod to rotate; and a clutch ring, which is hooped on the shaft rod so as to apply a predetermined pressure to the shaft rod, wherein the clutch ring has an abutment portion, which correspondingly abuts against the stop portion and is circumferentially fixed relative to the support bushing.

Description

Roller blinds and their winding drum installation devices Technical Field

[0001] This application relates to the field of curtain accessories technology, and in particular to a roller blind and its winding tube installation device. Background Technology

[0002] Roller blinds typically include a roller, a curtain wound around the roller, and roller mounting devices located at both ends of the roller for securing the roller to a wall at the top of the window.

[0003] Traditional roller blind installation devices include a support frame for fixing to a wall, a support bushing inserted and fixed to one end of the roller blind, and a shaft with one end pivotally mounted in the support bushing and the other end fixed to the support frame. During installation, the installer, considering the width of the window and the length of the roller blind, first installs the support frame at predetermined positions on the wall corresponding to both sides of the window. Then, two support bushings, each pre-assembled with a shaft, are inserted into and positioned inside the roller blind through openings at both ends. Finally, the outer ends of the shafts extending from the ends of the roller blind are fixed to the support frame using screws or hooks.

[0004] However, during the actual implementation, the inventors discovered that there was a certain assembly error when the two support frames were installed on the wall, which made it impossible for the distance between the two support frames to be well matched with the length of the winding drum. As a result, after the shaft at one end of the winding drum was fixed to the support frame, it was difficult for the shaft at the other end to be accurately aligned with the corresponding support frame. This caused repeated adjustments and installations to be required during assembly, making the assembly process very troublesome.

[0005] Some existing curtain top beam no-drill installation devices can accommodate small-range dimensional fluctuations in the installation space of the top beam by driving the top rod installed at the end of the top beam to extend and retract axially relative to the top beam. However, these curtain top beam no-drill installation devices are mainly used for products such as Roman blinds and Venetian blinds. When the curtain is in use, neither the top beam nor the top rod installed on the top beam will rotate. However, when roller blinds are in use, the roller will rotate, making the existing curtain top beam no-drill installation devices unsuitable for roller blind products. Technical issues

[0006] The technical problem to be solved by the embodiments of this application is to provide a roller shutter winding tube installation device that can improve the size compatibility of installation within a certain range.

[0007] A further technical problem to be solved by the embodiments of this application is to provide a roller blind that can improve the size compatibility of installation to a certain extent. Solution

[0008] To address the aforementioned technical problems, this application provides the following technical solution: a roller shutter winding tube installation device, comprising:

[0009] A support frame for fixing to a corresponding wall, the support frame having a pivot joint;

[0010] A support bushing for inserting and fixing to one end of a winding cylinder, wherein a receiving cavity is formed inside the support bushing with an opening at one end near the support frame, and a screw is provided at the end of the receiving cavity away from the opening, and a stop portion is formed on the cavity wall between the screw and the opening.

[0011] A shaft corresponding to the support frame and the support bushing is provided. One end of the shaft is pivotally connected to the pivot part of the support frame, while the other end is threaded into the receiving cavity of the support bushing via the opening and threaded to the threaded member. The pivot end is further provided with an abutment platform corresponding to the side surface of the support frame facing the support bushing and a drive part for driving the shaft to rotate.

[0012] A clutch ring is clamped onto the shaft to apply a predetermined pressure to the shaft. The clutch ring has an abutting portion that corresponds to and abuts against the stop portion and is fixed relative to the support bushing in the circumferential direction.

[0013] Furthermore, the end of the receiving cavity away from the opening is formed with a sliding groove having an inlet and outlet facing the opening. The screw is slidably inserted into the sliding groove via the inlet and outlet and is fixed relative to the sliding groove in the circumferential direction. The device also includes an elastic member assembled in the receiving cavity. The elastic member is configured to apply elastic force to the screw to cause the screw to move outward from the inlet and outlet of the sliding groove, thereby pushing the shaft so that the abutment platform and the support frame remain in contact.

[0014] Furthermore, the end face of the screw connector near the opening is provided with a screw hole, and the screw end of the shaft is provided with a screw portion that is screwed into the screw hole; or, the end face of the screw connector near the opening is provided with a screw portion, and the end face of the screw end of the shaft is correspondingly provided with a screw hole that is screwed into the screw portion.

[0015] Furthermore, the sliding groove is provided with a through hole on the groove wall at the end opposite to the inlet / outlet, and the end of the screw connector away from the shaft is provided with a hook part that passes through the through hole and hooks onto the periphery of the outer end of the through hole to prevent the screw connector from sliding completely out of the sliding groove from the inlet / outlet.

[0016] Furthermore, the screw connector is a stepped shaft with one end thin and the other end thick, and the thick end is screwed to the shaft. The elastic element is a spring correspondingly sleeved on the thin end of the screw connector. The opposite ends of the spring abut against the groove wall at the end of the sliding groove opposite to the inlet and outlet and the connecting step surface between the thin end and the thick end, respectively.

[0017] Furthermore, the outer wall of the shaft is provided with a first positioning protrusion and a second positioning protrusion having a predetermined distance in the axial direction of the shaft. The clutch ring is assembled between the first positioning protrusion and the second positioning protrusion and is positioned in the axial direction by the first positioning protrusion and the second positioning protrusion.

[0018] Furthermore, the device also includes an end cap fixedly assembled at the opening of the support bushing. The end cap has a through hole in the middle for the pivot end of the shaft to pass through. A first abutting protrusion is formed on the inner side of the end cap. A second abutting protrusion is formed on the outer side wall of the middle section of the shaft for abutting against the first abutting protrusion in the circumferential direction when the shaft rotates and moves axially relative to the support bushing, thereby limiting the maximum outward extension of the shaft relative to the support bushing.

[0019] Furthermore, one of the side surfaces of the abutting platform and the support frame that abut against each other is a convex spherical surface.

[0020] Furthermore, the stopping part is a stopping groove formed by recessing from the inner wall of the support bushing, and the clutch ring body is a torsion spring with two torsion arms as the abutment part, the two torsion arms extending into the stopping groove and abutting against the two side walls of the stopping groove respectively; or, the stopping part is a stopping protrusion formed by protruding from the inner wall of the support bushing, and the clutch ring body is a C-shaped retaining spring with two free ends as the abutment part, the stopping protrusion extending between the two free ends and abutting against the two free ends respectively.

[0021] On the other hand, in order to solve the above-mentioned further technical problems, the embodiments of this application provide the following technical solutions: a roller blind, including a winding drum and a winding drum mounting device assembled at at least one end of the winding drum, wherein the winding drum mounting device is a winding drum mounting device as described in any of the above claims. Beneficial effects

[0022] After adopting the above technical solution, the embodiments of this application have at least the following beneficial effects: The embodiments of this application, by providing a pivot joint on the support frame and a circumferentially fixed threaded connector on the support bushing, have one end of the shaft pivotally connected to the pivot joint of the support frame and the other end threadedly connected to the threaded connector. A clutch ring body is also clamped on the shaft to apply a predetermined pressure to the shaft. The clutch ring body is also positioned by abutting against a stop portion on the support bushing in the circumferential direction. Thus, the clutch ring body acts as a clutch for one-way transmission between the support bushing and the shaft. When it is necessary to adjust the length of the shaft extending relative to the support bushing during the installation of the winding drum, this can be achieved using… The corresponding tool drives the shaft to rotate in the corresponding direction. The clutch ring ensures that the support bushing does not rotate synchronously, while the threaded end of the shaft rotates relative to the threaded part. This causes the shaft to move axially and extend / retract relative to the support bushing to accommodate the gap between the winding drum and the support frame, effectively compatibility with dimensional deviations caused by errors in the support frame's installation position. During normal use of the roller blind, when driving the winding drum to rotate and raise / lower the curtain, the static friction between the clutch ring and the shaft is sufficient to ensure that the support bushing drives the clutch ring and shaft to rotate synchronously. The shaft does not rotate relative to the threaded part, thus preventing axial movement and ensuring normal curtain raising and lowering. Furthermore, the shaft also abuts against the side of the support frame with an abutment platform, ensuring that the winding drum does not move axially during use, resulting in good stability. Attached Figure Description

[0023] Figure 1 is a schematic diagram of an optional embodiment of the roller shutter mounting device of this application and the disassembled structure of the roller shutter.

[0024] Figure 2 is a schematic diagram of the assembly structure of an optional embodiment of the roller shutter mounting device of this application.

[0025] Figure 3 is a schematic diagram of an optional embodiment of the roller shutter mounting device of this application and a cross-sectional structure of the roller shutter along the central axis of its length.

[0026] Figure 4 is a cross-sectional structural schematic diagram along the radial central plane of an optional embodiment of the roller shutter mounting device of this application.

[0027] Figure 5 is a cross-sectional structural schematic diagram along the radial central plane of another optional embodiment of the roller shutter mounting device of this application.

[0028] Figure 6 is a cross-sectional view of the support bushing along the radial central plane of the sliding groove in another optional embodiment of the roller shutter mounting device of this application.

[0029] Figure 7 is a schematic diagram of the disassembled structure of the support bushing and end cap when the first abutting protrusion and the second abutting protrusion abut against each other in an optional embodiment of the roller shutter installation device of this application. Embodiments of the present invention

[0030] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present application and are not intended to limit the present application. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0031] As shown in Figures 1-5, an optional embodiment of this application provides a roller shutter winding tube installation device, including:

[0032] A support frame 1 is used to fix the device to the corresponding wall, and the support frame is provided with a pivot part 10;

[0033] A support bushing 3 is used to insert and fix one end of the winding cylinder A. The support bushing 3 has a storage cavity 30 with an opening 301 at one end near the support frame 1. A screw connector 32 is provided at the end of the storage cavity 30 away from the opening 301, and a stop portion 34 is formed on the cavity wall between the screw connector 32 and the opening 301.

[0034] The shaft 5, corresponding to the support frame 1 and the support bushing 3, has one end as a pivot end 5a pivotally connected to the pivot part 10 of the support frame 1, and the other end as a threaded end 5b inserted into the receiving cavity 30 of the support bushing 3 via the opening 301 and threadedly connected to the threaded member 32. The pivot end 5a is also provided with an abutment platform 50 corresponding to the side surface of the support frame 1 facing the support bushing 3 and a drive part 52 for driving the shaft 5 to rotate; and

[0035] A clutch ring 7 is clamped onto the shaft 5 to apply a predetermined pressure to the shaft 5. The clutch ring 7 has an abutting portion 70 that abuts against the stop portion 34 and is fixed relative to the support bushing 3 in the circumferential direction.

[0036] The static friction between the clutch ring 7 and the shaft 5 is proportional to the pressure exerted by the clutch ring 7 on the shaft 5. By designing a suitable size for the pressure exerted by the clutch ring 7 on the shaft 5, the clutch ring 7 can function as a clutch for one-way transmission between the support bushing 3 and the shaft 5. Specifically, when the shaft 5 is driven to rotate in the corresponding direction using a corresponding tool in conjunction with the drive part 50 on the pivot end 5a, the static friction between the clutch ring 7 and the shaft 5 will cause the clutch ring 7 to tend to rotate synchronously with the shaft 5. However, since the abutting part 70 of the clutch ring 7 is in circumferential contact with the stop part 34 on the support bushing 3, and the support bushing 3 is relatively fixed to the winding drum A and has a large resistance torque, it is difficult to drive the shaft 5 to rotate. The clutch ring 7 drives the support bushing 3 and the winding drum A to rotate, causing a slight elastic deformation at the contact portion 70 of the clutch ring 7, which slightly opens the shaft 5. This breaks the original static friction balance between the shaft 5 and the clutch ring 7, causing the shaft 5 to rotate relative to the clutch ring 7 (the two become sliding friction). The threaded end 5b of the shaft 5 rotates relative to the threaded connector 32, resulting in axial movement. Depending on the direction of rotation, this creates the effect of the shaft 5 extending or retracting relative to the support bushing 3. During normal use of the roller blind, when driving the winding drum A to rotate to raise or lower the curtain, the static friction between the clutch ring 7 and the shaft 5 is sufficient to ensure that the support bushing 3 drives the clutch ring 7 and the shaft 5 to rotate synchronously. The shaft 5 does not rotate relative to the threaded connector 32, thus preventing axial movement.

[0037] In this embodiment, a pivot portion 1010 is provided on the support frame 1, and a circumferentially fixed threaded member 32 is provided on the support bushing 3. One end of the shaft 5 is pivotally connected to the pivot portion 10 of the support frame 1, while the other end is threaded to the threaded member 32. A clutch ring 7 is also clamped on the shaft 5 to apply a predetermined pressure to the shaft 5. The clutch ring 7 is also positioned by abutting abutting a stop portion 34 on the support bushing 3 in the circumferential direction with abutting part 70. Thus, the clutch ring 7 acts as a clutch for one-way transmission between the support bushing 3 and the shaft 5. When it is necessary to adjust the length of the shaft 5 extending relative to the support bushing 3 during the installation of the winding drum A, the shaft 5 can be driven by a corresponding tool. Rotating in the corresponding direction, the clutch ring 7 ensures that the support bushing 3 does not rotate synchronously, while the threaded end of the shaft 5 rotates relative to the threaded connector 32. This allows the shaft 5 to move axially and extend / retract relative to the support bushing 3 to accommodate the gap between the winding drum A and the support frame 1, effectively compatibility with dimensional deviations caused by errors in the installation position of the support frame 1. During normal use of the roller blind, when driving the winding drum A to rotate to raise and lower the curtain, the static friction between the clutch ring 7 and the shaft 5 is sufficient to ensure that the support bushing 3 drives the clutch ring 7 and the shaft 5 to rotate synchronously. The shaft 5 does not rotate relative to the threaded connector 32, thus preventing axial movement and ensuring normal curtain raising and lowering. Furthermore, the shaft 5 abuts against the side of the support frame 1 with an abutment platform 50, ensuring that the winding drum A does not move axially during use, resulting in good stability.

[0038] In an optional embodiment of this application, as shown in Figures 1, 3 and 6, the end of the receiving cavity 30 away from the opening 301 is formed with a sliding groove 36 having an inlet and outlet 361 facing the opening 301. The screw connector 32 is slidably inserted into the sliding groove 36 via the inlet and outlet 361 and is fixed relative to the sliding groove 36 in the circumferential direction. The device also includes an elastic member 8 assembled in the receiving cavity 30. The elastic member 8 is configured to apply elastic force to the screw connector 32 to cause the screw connector 32 to move outward of the inlet and outlet 361 of the sliding groove 36, thereby pushing the shaft 5 so that the abutment 50 abuts against the support frame 1. In this embodiment, the screw connector 32 is slidably assembled into the sliding groove 36 of the support bushing 3 along the axial direction of the winding drum A. At the same time, an elastic element 8 is added. When assembling the winding drum, the length of the shaft 5 extending relative to the support bushing 3 can be pre-adjusted. Then, axial pressure is applied to the shaft 5 to compress the elastic element 8 and retract it appropriately. When the pivot end 5a of the shaft 5 is aligned with the pivot part 10 on the support frame 1, the axial pressure applied to the shaft 5 is removed. The elastic element 8 rebounds and pushes the pivot end 5a of the shaft 5 to the position of pivoting with the pivot part 10. At the same time, the abutment platform 50 abuts against the support frame 1, thereby completing the assembly. The assembly is more convenient. Moreover, under the elastic force of the elastic element 8, the abutment platform 50 of the shaft 5 always abuts against the support frame 1, which helps to improve the overall stability of the roller blind.

[0039] In specific implementation, in order to achieve circumferential fixation between the sliding groove 36 and the screw connector 32, as shown in Figures 1 and 6, the outer contours of the cross sections of the sliding groove 36 and the screw connector 32 can be adapted to be non-circular (e.g., triangular, square, trapezoidal, regular polygon, etc.); the sliding groove can also be matched with a barb; or, a pin can be inserted laterally into the sliding groove 36 and the screw connector 32.

[0040] In one optional embodiment of this application, as shown in Figures 1 and 3, the end face of the screw connector 32 near the opening 301 is provided with a screw hole 321, and the screw end 5b of the shaft 5 is provided with a screw portion 54 that is screwed into the screw hole 321; or, the end face of the screw connector near the opening 301 is provided with a screw portion, and the end face of the screw end 5b of the shaft 5 is correspondingly provided with a screw hole that is screwed into the screw portion. This embodiment provides two different structural designs that can realize the screw connection between the screw connector 32 and the screw end 5b of the shaft 5, which facilitates flexible selection according to needs in practical applications.

[0041] In an optional embodiment of this application, as shown in Figures 1 and 7, the sliding groove 36 has a through hole 363 penetrating the groove wall at the end opposite to the inlet / outlet 361. The end of the screw connector 32 away from the shaft 5 has a corresponding hook portion 323 that passes through the through hole 363 and hooks onto the periphery of the outer opening of the through hole 363, preventing the screw connector 32 from completely sliding out of the sliding groove 361 from the inlet / outlet 361. In this embodiment, a hook portion 323 is also provided at the end of the screw connector 32 away from the shaft 5 to engage with the through hole 363 at the corresponding end of the sliding groove 36, thus preventing the screw connector 32 from completely disengaging from the sliding groove 36. In specific implementation, the hook part 323 can be a large-headed bolt screwed to the end of the screw connector 32 away from the shaft 5 (as shown in Figures 1, 3 and 7); or, the hook part 323 can be an elastic barb provided at the end of the screw connector 32 away from the shaft 5.

[0042] In an optional embodiment of this application, as shown in Figures 1 and 3, the threaded connector 32 is a stepped shaft with one end thinner than the other, and is threaded to the shaft 5 with the thicker end 32a. The elastic element 8 is a spring correspondingly sleeved on the thinner end 32b of the threaded connector 32. The opposite ends of the spring 8 abut against the groove wall of the sliding groove 36 at the end opposite to the inlet / outlet 361 and the connecting stepped surface 32c of the thinner end 32b and the thicker end 32a, respectively. In this embodiment, the threaded connector 32 adopts a stepped shaft design with one end thinner than the other, which facilitates the assembly of the elastic element 8 and reduces the size of the threaded connector 32 and the support bushing, thus better adapting to small-diameter winding drums.

[0043] In an optional embodiment of this application, as shown in Figures 1 and 3, the outer wall of the shaft 5 is provided with a first positioning protrusion 56 and a second positioning protrusion 58 having a predetermined spacing in the axial direction of the shaft 5. The clutch ring 7 is assembled between the first positioning protrusion 56 and the second positioning protrusion 58, and the clutch ring 7 is positioned in the axial direction by the first positioning protrusion 56 and the second positioning protrusion 58. In this embodiment, the clutch ring 7 is also blocked and limited from both ends in the axial direction by the first positioning protrusion 56 and the second positioning protrusion 58 to ensure stable positioning of the clutch ring 7. Specifically, as shown in Figure 7, at least one of the first positioning protrusion 56 and the second positioning protrusion 58 is provided with a guide arc surface 561 to facilitate the clutch ring 7 to elastically open and fit between the first positioning protrusion 56 and the second positioning protrusion 58. In addition, the first positioning protrusion 56 and the second positioning protrusion 58 can be a continuously extending annular protrusion structure in the circumferential direction, or they can be protrusion structures that are only discretely distributed in the circumferential direction.

[0044] In an optional embodiment of this application, as shown in Figures 1 and 7, the device further includes an end cap 9 fixedly assembled at the opening 301 of the support bushing 3. The end cap 9 has a through hole 90 in the middle for the pivot end 5a of the shaft 5 to pass through. A first abutting protrusion 92 is formed on the inner side of the end cap 9. A second abutting protrusion 59 is formed on the outer side wall of the middle section of the shaft 5 to abut against the first abutting protrusion 92 in the circumferential direction when the shaft 5 rotates and moves axially relative to the support bushing 3, thereby limiting the maximum outward extension of the shaft 5 relative to the support bushing 3. In this embodiment, an end cap 9 is also provided, with a through hole 90 in the middle of the end cap 9 for the pivot end 5a of the shaft 5 to extend out. This end cap 9 covers the gap between the shaft 5 and the opening 301 of the support bushing 3, preventing foreign objects from entering and affecting the rotation of the shaft 5. Furthermore, a first abutting protrusion 92 and a second abutting protrusion 59 are provided, which can abut against each other from the side, thereby limiting the maximum extension length of the shaft 5 and preventing the shaft 5 from coming out of the support bushing 3.

[0045] In a specific implementation, the second abutting protrusion 59 may be disposed on the side of the second positioning protrusion 58 near the end cap 9, so that the second abutting protrusion 59 and the second positioning protrusion 58 can be integrally formed during manufacturing.

[0046] In an optional embodiment of this application, as shown in FIG1, one of the side surfaces of the abutting platform 50 and the support frame 1 that abut against each other is a convex spherical surface 501. In this embodiment, designing one side surface of the abutting platform 50 and the support frame 1 that abuts against each other as a smooth convex spherical surface 501 can achieve the abutting and positioning effect of the abutting platform 50 and the support frame 1, and can also reduce the contact area between the two and correspondingly reduce the friction between them, which is beneficial to smoother pulling of the curtain when using the roller blind.

[0047] In one optional embodiment of this application, as shown in FIG4, the stop portion 34 is a stop groove formed by a recess in the inner wall of the support bushing 3, and the clutch ring 7 is a torsion spring with two torsion arms serving as the abutment portion 70. The two torsion arms 70 extend into the stop groove 34 and abut against the two side walls of the stop groove 34 respectively. Alternatively, as shown in FIG5, the stop portion 34 is a stop protrusion formed by a protrusion in the inner wall of the support bushing 3, and the clutch ring 7 is a C-shaped retaining spring with two free ends serving as the abutment portion 70. The stop protrusion 34 extends between the two free ends 70 and abuts against the two free ends 70 respectively. In this embodiment, either a torsion spring or a C-shaped retaining spring can be used to achieve the corresponding clutch function of the clutch ring 7, which can be flexibly selected in practical applications.

[0048] In a specific implementation, as shown in Figures 1 and 3, the pivot portion 10 is a shaft hole, and the pivot end 5a of the shaft 5 corresponds to forming a round shaft 5c inserted into the shaft hole 10. The driving part 52 is a driving hole or driving rod with a non-circular cross-section, located on the end face of the round shaft 5c, so that the driving part 54 protrudes from one side opening of the shaft hole 10. Of course, it can be understood that the pivot portion 10 can also be a round shaft and the pivot end 5a of the shaft 5 can be a shaft hole. However, in this solution, the driving part 52 can only be located in other exposed parts of the pivot end 5a, such as a toggle wheel or toggle handle located on the side of the pivot end 5a.

[0049] On the other hand, as shown in Figure 1, this application embodiment provides a roller blind, including a winding cylinder A and a winding cylinder mounting device assembled to at least one end of the winding cylinder A. The winding cylinder mounting device is the winding cylinder mounting device as described in the above embodiment. This embodiment facilitates the installation of the winding cylinder.

[0050] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of this application.

Claims

1. A winding drum mounting device of a roller shutter, comprising a support frame for being fixed to a corresponding wall, a support bushing for being insertedly fixed to one end of a winding drum, and a shaft rod corresponding connecting the support frame and the support bushing, characterized in that, a pivoting portion is arranged on the support frame; a receiving cavity with an opening at one end close to the support frame is formed inside the support bushing, a screwing member is arranged at the end of the receiving cavity away from the opening, and a stop portion is formed on the cavity wall between the screwing member and the opening; one end of the shaft rod is pivoted with the pivoting portion of the support frame as a pivoting end, and the other end is inserted into the receiving cavity of the support bushing through the opening and is screwed with the screwing member as a screwing end, the pivoting end is further provided with an abutting table corresponding to the side surface of the support frame towards the support bushing for abutting positioning, and a driving portion for driving the shaft rod to rotate; the device further comprises: a clutch ring body clamped on the shaft rod to apply a predetermined pressure on the shaft rod, the clutch ring body has an abutting portion corresponding to the stop portion for being fixed relative to the support bushing in the circumferential direction. the end of the receiving cavity away from the opening is formed with a sliding slot having an entrance opening towards the opening, the screwing member is correspondingly and slidably inserted into the sliding slot through the entrance opening and is fixed relative to the sliding slot in the circumferential direction, the mounting device further comprises a resilient member assembled in the receiving cavity, the resilient member is arranged to apply a resilient force on the screwing member to move the screwing member to the outside of the entrance opening of the sliding slot and to push the shaft rod so that the abutting table keeps abutting with the support frame. the end face of the end of the screwing member close to the opening is provided with a screw hole, and the screwing end of the shaft rod is provided with a screw rod portion screwed with the screw hole; or, the end of the screwing member close to the opening is provided with a screw rod portion, and the end face of the screwing end of the shaft rod is correspondingly provided with a screw hole screwed with the screw rod portion. the slot wall at the end opposite to the entrance opening of the sliding slot is further provided with a through hole penetrating through the slot wall, and the end of the screwing member away from the shaft rod is correspondingly provided with a hooking portion penetrating through the through hole and correspondingly hooked on the peripheral edge of the through hole outer end opening to avoid the screwing member from completely sliding out of the sliding slot through the entrance opening. the screwing member is a stepped shaft rod with one end thin and the other end thick, and the thick end is screwed with the shaft rod, the resilient member is a spring correspondingly sleeved on the thin end of the screwing member, and the opposite ends of the spring are respectively abutted on the slot wall at the end of the sliding slot opposite to the entrance opening and the connecting step surface between the thin end and the thick end.

2. The roller blind roller tube mounting arrangement of claim 1, wherein, the outer side wall of the shaft rod is provided with a first positioning protrusion and a second positioning protrusion having a predetermined interval in the axial direction of the shaft rod, the clutch ring body is assembled between the first positioning protrusion and the second positioning protrusion, and the first positioning protrusion and the second positioning protrusion position the clutch ring body in the axial direction.

3. The roller blind roller tube mounting arrangement of claim 2, wherein, ​ 4. The roller blind roller tube mounting arrangement of claim 2, wherein, ​ 5. The roller blind roller tube mounting arrangement of claim 2, wherein, ​ 6. The roller tube mounting arrangement for a roller shade of claim 1, wherein, ​ 7. The roller tube mounting arrangement for a roller shade of claim 1, wherein, The device further comprises an end cover fixedly assembled at the opening of the support sleeve, a through hole is formed in the middle of the end cover for the pivoted end of the shaft rod to pass through, a first abutting protrusion is formed on the inner side of the end cover, and a second abutting protrusion is formed on the outer side wall of the middle section of the shaft rod for abutting against the first abutting protrusion in the circumferential direction to limit the maximum stroke of the shaft rod extending outward relative to the support sleeve when the shaft rod rotates and axially moves relative to the support sleeve.

8. The roller tube mounting arrangement for a roller shade of claim 1, wherein, One of the side surfaces of the abutting table and the support frame abutting against each other is a convex spherical surface.

9. The roller tube mounting arrangement for a roller shade of claim 1, wherein, The stop portion is a stop groove recessed from the inner wall of the support sleeve, the clutch ring body is a torsion spring with two torsion arms as the abutting portions, and the two torsion arms extend into the stop groove and abut against the groove walls on both sides of the stop groove; or, the stop portion is a stop protrusion protruded from the inner wall of the support sleeve, the clutch ring body is a C-shaped clasp with two free ends as the abutting portions, and the stop protrusion extends between the two free ends and abuts against the two free ends.

10. A roller blind comprising a roller tube and a roller tube mounting device assembled to at least one end of the roller tube, characterized in that The winding drum mounting device is the winding drum mounting device according to any one of claims 1-9.

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