Roller shutter and winding drum mounting device thereof

Abstract

The embodiment of the utility model provides a roller shutter and a winding drum mounting device thereof, the device is used for mounting a winding drum on a support frame, and the device comprises a support shaft and a shaft sleeve, the clutch piece is assembled on the supporting shaft in a sliding mode and can slide back and forth in the axial direction of the supporting shaft, one end of the clutch piece protrudes out of the end face of the first end of the supporting shaft, and the clutch piece is further provided with a first locking part which slides along with the clutch piece and moves back and forth between the locking position and the unlocking position. The locking position and the unlocking position are both located between the first end and the second end of the supporting shaft, and the locking position is closer to the first end than the unlocking position. A plurality of second locking parts which are uniformly distributed in the circumferential direction and are used for selectively matching with the first locking parts moved to the locking position so as to lock the clutch piece and the shaft sleeve in the circumferential direction are arranged on the shaft sleeve corresponding to the locking position; the elastic reset piece is arranged between the supporting shaft and the clutch piece and used for driving the clutch piece to slide so that the first locking part can move to the locking position. The embodiment of the utility model is convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of curtain accessories, and particularly to a rolling curtain and a winding cylinder mounting device thereof. Background Art

[0002] Traditional rolling curtains all include a winding cylinder, a curtain cloth wound around the outer side of the winding cylinder, a spring driver disposed inside the winding cylinder for driving the winding cylinder to rotate to wind and unwind the curtain cloth, and a winding cylinder mounting device for assembling the winding cylinder to the wall at the top of the window.

[0003] The existing winding cylinder mounting device includes: a support frame fixed to the corresponding wall, a support shaft with one end fixed to the support frame and the other end inserted into the winding cylinder for driving connection with the core shaft of the spring driver, and a bushing inserted and fixed at one end of the winding cylinder and correspondingly sleeved outside the support shaft. The bushing and the support shaft are axially relatively fixed and circumferentially relatively movable. To achieve driving, the housing of the spring driver is relatively fixed to the winding cylinder. When the spring driver outputs power, its core shaft and the housing generate relative movement. Since the core shaft is fixedly connected to the support shaft and remains fixed to the support frame, the housing of the spring driver and the winding cylinder are correspondingly rotated to achieve power output. During actual production, the spring driver, the support shaft, and the bushing are usually pre-assembled into an assembly. Moreover, the scroll spring inside the spring driver is pre-wound around the corresponding spring shaft and the spring shaft and the housing of the spring driver are locked to each other by a pin to prevent the spring from loosening. When installing the rolling curtain, first fix the support frame on the wall, then pull out the pin and keep the outer shell of the spring driver and the support shaft without relative movement, and then install the whole assembly into the winding cylinder and make the bushing and the winding cylinder correspondingly inserted and fixed. Finally, fix the outer end of the support shaft to the corresponding support frame.

[0004] However, the inventor found during specific implementation that during the installation process, after pulling out the pin, measures must be taken to keep the support shaft, the outer shell of the spring driver, and the winding cylinder without relative movement in the circumferential direction until the support shaft is fixed to the corresponding support frame, and the operation is relatively troublesome. Moreover, during the subsequent use after installation, there may be a situation where the user needs to disassemble and reassemble the rolling curtain again. During the process of removing the support shaft from the support frame and after removal, special attention needs to be paid to keeping the support shaft and the winding cylinder without relative movement in the circumferential direction. Otherwise, the scroll spring will release elastic potential energy and loosen due to the lack of a locking structure, resulting in abnormal use. And it is difficult for the user to reset the scroll spring to the wound state without professional tools, and only the spring driver can be scrapped or sent back to the corresponding manufacturer for repair, which is costly. Summary of the Utility Model

[0005] The technical problem to be solved by the embodiments of the present utility model is to provide a rolling curtain winding cylinder installation device that can facilitate disassembly, assembly, and maintenance.

[0006] The further technical problem to be solved by the embodiments of the present utility model is to provide a rolling curtain that can facilitate disassembly, assembly, and maintenance.

[0007] To solve the above technical problems, the embodiments of the present utility model provide the following technical solutions: A rolling curtain winding cylinder installation device for installing the winding cylinder of a rolling curtain onto a corresponding support frame. The device includes:

[0008] A support shaft with a first end for being fixedly assembled to the support frame and a second end opposite thereto for being inserted into one end of the winding cylinder and fixedly connected to the core shaft of the spring driver of the rolling curtain; and

[0009] A shaft sleeve plugged and fixed to the end of the winding cylinder and sleeved outside the support shaft;

[0010] A clutch member slidably assembled on the support shaft and relatively fixed to the support shaft in the circumferential direction while being axially slidable relative to the support shaft. One end of the clutch member protrudes from the first end face of the support shaft. The clutch member is also provided with a first locking portion that moves back and forth between a locked position and an unlocked position as the clutch member slides. Both the locked position and the unlocked position are located between the first end and the second end of the support shaft, and the locked position is closer to the first end than the unlocked position. One end of the clutch member protrudes from the first end face of the support shaft, and under the reverse push of the support frame, the first locking portion is moved to the unlocked position. A plurality of second locking portions are provided on the shaft sleeve corresponding to the locked position, which are evenly distributed in the circumferential direction and are used to selectively cooperate with the first locking portion moved to the locked position to lock the clutch member and the shaft sleeve to each other in the circumferential direction; and

[0011] An elastic reset member disposed between the support shaft and the clutch member for driving the clutch member to slide so that the first locking portion is moved to the locked position.

[0012] Furthermore, a central hole extending along the axial direction of the support shaft and penetrating the first end face is provided at the axis of the support shaft. A chute parallel to the extension of the central hole and having a bottom connected to the central hole is provided on the side wall of the support shaft. Opposite ends of the chute are both closed and respectively correspond to the locked position and the unlocked position. The clutch member includes a sliding rod correspondingly inserted into the central hole and a locking rod fixed to one end of the sliding rod located in the central hole and having an outer end as the first locking portion and extending out through the chute. The second locking portion is a slot correspondingly formed on the shaft sleeve. A guiding surface for guiding the first locking portion to slide into the slot is provided on a side surface of the first locking portion facing the second locking portion.

[0013] Furthermore, the bushing includes an end plate having a first shaft hole formed at the center for the corresponding passing of the support shaft, and rib strips extending outwardly and protruding parallel to the central axis of the first shaft hole from one side plate surface of the end plate. The rib strips are evenly distributed circumferentially around the first shaft hole, and a slot is formed between any two adjacent rib strips.

[0014] Furthermore, the bushing further includes a positioning plate fixed to the free ends of each rib strip. A second shaft hole for the support shaft to pass through is formed at the center of the positioning plate, and a positioning card slot adapted to the inner wall of the winding cylinder is provided at the periphery. The inner side edge of the rib strip is in a stepped shape, and the end closer to the end plate is closer to the central axis of the first shaft hole than the end farther from the end plate. The space between any two rib strips is formed with the slot at the end closer to the end plate and a clearance groove for correspondingly avoiding the first locking portion at the end farther from the end plate.

[0015] Furthermore, a card hole corresponding to each rib strip is formed on the positioning plate. A first locking groove is provided at the free end of each rib strip, and a first elastic barb passes through the corresponding card hole and locks the positioning plate in the first locking groove. A flange is formed at the first end of the support shaft, and a snap ring groove is further provided near the second end. The second end passes through the first shaft hole and the second shaft hole in sequence and extends out of the bushing, and is clamped in the snap ring groove by a snap ring. The flange and the snap ring respectively abut against the outer side plate surfaces of the end plate and the positioning plate of the bushing.

[0016] Furthermore, the sliding grooves are formed on the outer side walls on the opposite sides of the support shaft. The middle part of the locking rod is fixed to the sliding rod, and the opposite ends respectively extend out from the sliding grooves on the corresponding sides of the support shaft. The rib strips are symmetrically distributed with respect to the central axis of the first shaft hole.

[0017] Furthermore, a through hole is formed in the middle part of the locking rod. A second locking groove is provided at the end of the sliding rod inserted into the central hole near the end, and a second elastic barb is provided at the end. The sliding rod locks the locking rod in the second locking groove with the second elastic barb passing through the through hole on the locking rod; alternatively, a threaded hole is formed in the middle part of the locking rod, and an external thread is provided at the end of the sliding rod and is correspondingly screwed into the threaded hole of the locking rod.

[0018] Furthermore, a large head is further formed at the end of the sliding rod located outside the central hole. A stop boss protrudes radially from the hole wall of the central hole. The elastic reset member is a helical compression spring sleeved on the sliding rod and having opposite ends respectively abutted against the large head and the stop boss.

[0019] Further, a flange is formed at the first end of the support shaft, and a positioning groove penetrating the flange is formed on the flange. The clutch member includes a main body portion disposed outside the flange and a positioning arm extending parallel to the axial direction of the support shaft from one side of the main body portion toward the flange, with the free end of the positioning arm passing through the positioning groove. The first locking portion is disposed at the free end of the positioning arm, the second locking portion is a slot correspondingly formed on the shaft sleeve, and the elastic reset member is disposed between the flange and the main body portion.

[0020] On the other hand, to solve the above further technical problems, the embodiment of the present invention provides the following technical solution: A roller shutter includes a winding cylinder, a support frame for being installed on the walls on both sides of the top of the window, a spring driver assembled in the winding cylinder, and a winding cylinder mounting device disposed at at least one end of the winding cylinder, and the winding cylinder mounting device is the winding cylinder mounting device as described in any one of the above.

[0021] After adopting the above technical solution, the embodiment of the present invention has at least the following beneficial effects: By adding a clutch member and an elastic reset member, the clutch member is held in the locked position under the action of the elastic reset member, so that the first locking portion on the clutch member cooperates with a corresponding one of the multiple second locking portions on the shaft sleeve to lock the clutch member and the shaft sleeve in the circumferential direction. Furthermore, the shaft sleeve and the support shaft are relatively fixed in the circumferential direction; the second end of the support shaft is assembled and connected to the core shaft of the spring driver of the roller shutter, which is convenient for the whole to be reinstalled into the winding cylinder to form a pre-assembled body. At this time, both the shaft sleeve and the outer shell of the spring driver are relatively fixed to the winding cylinder, so that the core shaft and the outer shell of the spring driver will not rotate relatively, ensuring that the scroll spring in the spring driver will not become loose; when the assembler reinstalls the pre-assembled body onto the corresponding support frame, since one end of the clutch member protrudes from the end face of the first end of the support shaft and can move toward the inside of the winding cylinder under the reverse pushing action of the support frame, the first locking portion on the clutch member is disengaged from the second locking portion, and the winding cylinder can rotate normally relative to the support shaft under the drive of the spring driver to realize the normal lifting and lowering of the curtain of the roller shutter. When it is necessary to disassemble the winding cylinder again, it is only necessary to remove the support shaft from the support frame according to the conventional disassembly method. Moreover, once the clutch member leaves the support frame, it will automatically return to its original position under the elastic force of the elastic reset member, so that the first locking portion returns to the locked position to lock with the second locking portion, effectively avoiding the problem that the scroll spring in the spring driver becomes loose and is scrapped or requires professional maintenance. No other tools for auxiliary locking of the scroll spring are required for the disassembly and assembly operations, which is very convenient. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the split structure of an optional embodiment of the winding cylinder mounting device of the roller shutter of the present invention and the winding cylinder.

[0023] Figure 2 This is a schematic diagram of the split structure of an alternative embodiment of the winding cylinder mounting device for the rolling curtain of the present utility model, the winding cylinder and the support frame.

[0024] Figure 3 This is a schematic diagram of the assembled structure of an alternative embodiment of the winding cylinder mounting device for the rolling curtain of the present utility model.

[0025] Figure 4 This is a schematic cross-sectional structure diagram of the middle axis plane along the length at the front of the assembly of an alternative embodiment of the winding cylinder mounting device for the rolling curtain of the present utility model and the support frame.

[0026] Figure 5 This is a schematic cross-sectional structure diagram of the middle axis plane along the length at the rear of the assembly of an alternative embodiment of the winding cylinder mounting device for the rolling curtain of the present utility model and the support frame.

[0027] Figure 6 This is a schematic cross-sectional structure diagram of the middle axis plane along the length of the linkage latch at the front of the assembly of an alternative embodiment of the winding cylinder mounting device for the rolling curtain of the present utility model and the support frame.

[0028] Figure 7 This is a schematic cross-sectional structure diagram of the middle axis plane along the length of the linkage latch at the rear of the assembly of an alternative embodiment of the winding cylinder mounting device for the rolling curtain of the present utility model and the support frame.

[0029] Figure 8 This is a schematic diagram of the structure of the bushing of an alternative embodiment of the winding cylinder mounting device for the rolling curtain of the present utility model.

[0030] Figure 9 This is a schematic cross-sectional structure diagram of another alternative embodiment of the winding cylinder mounting device for the rolling curtain of the present utility model. Detailed implementation manners

[0031] The following further describes the present application in detail with reference to the drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0032] As Figures 1 - 8 shown, an alternative embodiment of the present utility model provides a winding cylinder mounting device for a rolling curtain, which is used to mount the winding cylinder A of the rolling curtain to the corresponding support frame 1, and includes:

[0033] A support shaft 3 having a first end 3a for fixedly assembling on the support frame 1 and a second end 3b opposite thereto for inserting into one end of the winding cylinder A and fixedly connecting to the core shaft C of the spring driver B of the rolling curtain; and

[0034] A bushing 5 that is inserted and fixed to the end of the winding cylinder A and sleeved outside the support shaft 3;

[0035] A clutch member 7 that is slidably assembled on the support shaft 3 and is circumferentially fixed relative to the support shaft 3 and axially slidable relative to the support shaft 3. One end of the clutch member 7 protrudes from the end face of the first end 3a of the support shaft 3. The clutch member 7 is also provided with a first locking portion 7a that moves back and forth between a locking position and an unlocking position as the clutch member 7 slides. Both the locking position and the unlocking position are located between the first end 3a and the second end 3b of the support shaft 3, and the locking position is closer to the first end 3a than the unlocking position. One end of the clutch member 7 protrudes from the end face of the first end 3a of the support shaft 3, and under the counter-pushing of the support frame 1, the first locking portion 7a is moved to the unlocking position. A plurality of first locking portions 5a that are evenly distributed in the circumferential direction and are used to selectively cooperate with the first locking portion 7a that moves to the locking position to lock the clutch member 7 and the bushing 5 to each other in the circumferential direction are provided at the corresponding locking position on the bushing 5; and

[0036] An elastic return member 9 that is arranged between the support shaft 3 and the clutch member 7 and is used to drive the clutch member 7 to slide so that the first locking portion 7a moves to the locking position.

[0037] In the embodiment of the present utility model, by adding a clutch member 7 and an elastic reset member 9, the clutch member 7 is maintained at the locking position under the action of the elastic reset member 9, so that a corresponding one of the plurality of second locking portions 5a on the shaft sleeve 5 cooperates with the first locking portion 7a on the clutch member 7 to lock the clutch member 7 and the shaft sleeve 5 in the circumferential direction. Furthermore, the shaft sleeve 5 and the support shaft 3 are relatively fixed in the circumferential direction; the second end 3b of the support shaft 3 is assembled and connected to the core shaft C of the spring driver B of the rolling curtain, which is convenient for the whole to be reinstalled into the winding cylinder A to form a pre-assembled body. At this time, both the shaft sleeve 5 and the outer shell of the spring driver B are relatively fixed to the winding cylinder A, so that the core shaft C and the outer shell of the spring driver B will not rotate relative to each other, ensuring that the scroll spring in the spring driver B will not become loose; and when the assembler reinstalls the pre-assembled body onto the corresponding support frame 1, since one end of the clutch member 7 protrudes from the end face of the first end 3a of the support shaft 3 and can move towards the inside of the winding cylinder A under the pushing action of the support frame 1, the first locking portion 7a on the clutch member 7 is disengaged from the second locking portion 5a, and the winding cylinder A can rotate relative to the support shaft 3 normally under the drive of the spring driver B to realize the normal lifting and lowering of the curtain of the rolling curtain. And when it is necessary to remove the winding cylinder A again, it is only necessary to remove the support shaft 3 from the support frame 1 according to the conventional disassembly method. Moreover, once the clutch member 7 leaves the support frame 1, it will automatically return to its original position under the elastic force of the elastic reset member 9, so that the first locking portion 7a returns to the locking position to lock with the second locking portion 5a, effectively avoiding the problem that the scroll spring in the spring driver B becomes loose and is scrapped or requires professional maintenance. No other tools for assisting in locking the scroll spring are required for the disassembly and assembly operations, which is very convenient.

[0038] In specific implementation, to achieve the assembly and fixation of the support shaft 3 and the support frame 1, methods such as screw fixation, hook fixation, snap fixation, or plug-in fixation can be used. In embodiments such as Figures 1 - 8 hook fixation is used.

[0039] In an alternative embodiment of the present utility model, such as Figures 1 to 7As shown, a central hole 30 extending along the axial direction of the support shaft 3 and penetrating the center of the end face of the first end 3a is formed at the axis center of the support shaft 3. A chute 32 parallel to the central hole 30 and communicating with the central hole 30 at the bottom is formed on the side wall of the support shaft 3. Opposite ends of the chute 32 are both closed and respectively correspond to the locking position and the unlocking position. The clutch member 7 includes a slide bar 70 correspondingly inserted into the central hole 30 and a locking bar 72 fixed to one end of the slide bar 70 located in the central hole 30 and having its outer end as the first locking portion 7a and extending out through the chute 32. The second locking portion 5a is a slot correspondingly formed on the shaft sleeve 5. A guiding surface 721 for guiding the first locking portion 7a to slide into the slot 5a is provided on one side surface of the first locking portion 7a facing the second locking portion 5a. In this embodiment, by sliding the slide bar 70 in the central hole 30 of the support shaft 3, the locking bar 72 is driven to move back and forth at both ends of the chute 32. The outer end of the locking bar 72 constitutes the first locking portion 7a, and the outer end of the locking bar 72 is movably inserted into the slot 5a constituting the second locking portion 5a, so that the shaft sleeve 5 and the support shaft 3 can be unlocked and locked movably. In addition, since the second locking portions 5a are several symmetrically arranged around the central axis of the shaft sleeve 5, inevitably, the outer end of the locking bar 72 cannot be accurately aligned with the slot 5a. For this reason, in this embodiment, by providing the guiding surface 721, when the outer end of the locking bar 72 cannot be accurately aligned with the slot 5a, under the elastic force of the elastic reset member 9 and the guiding effect of the guiding surface 721, the end of the locking bar 72 can be gradually inserted into the slightly misaligned slot 5a to ensure effective locking of the shaft sleeve 5. In specific implementation, as Figure 1 shown in, the guiding surface 721 includes a guiding arc surface in the middle and guiding inclined surfaces arranged on both sides of the guiding arc surface.

[0040] In an alternative embodiment of the present utility model, as Figures 1 to 8 shown, the shaft sleeve 5 includes an end plate 50 having a first shaft hole 501 formed at the center for the support shaft 3 to correspondingly pass through, and rib strips 52 protruding outward from one side plate surface of the end plate 50 parallel to the central axis of the first shaft hole 501. The rib strips 52 are evenly distributed in the circumferential direction around the first shaft hole 501, and the slot 5a is formed between any two adjacent rib strips 52. In this embodiment, the shaft sleeve 5 includes an end plate 50 and rib strips 52, with a simple structure. The space between the rib strips 52 is used to form the slot 5a, which is convenient for the manufacture and design of the slot 5a.

[0041] In an alternative embodiment of the present utility model, as Figures 1 to 8As shown, the bushing 5 further includes a positioning plate 54 fixed to the free ends of the respective ribs 52. A second shaft hole 541 for the support shaft 3 to pass through is provided at the center of the positioning plate 54, and a positioning card slot 543 adapted to the inner wall of the winding cylinder A is provided at the periphery. The inner edge of the rib 52 is stepped, and the end closer to the end plate 50 is closer to the central axis of the first shaft hole 501 than the end farther from the end plate 50. The space between any two ribs 52 forms the slot 5a at the end closer to the end plate 50 and the avoidance groove 521 corresponding to avoiding the first locking portion 7a at the end farther from the end plate 50. In this embodiment, the bushing 5 is further provided with a positioning plate 54 fixed to the free ends of the respective ribs 52, so that the structure of the bushing 5 is more stable; moreover, the space between any two ribs 52 forms the slot 5a and the avoidance groove 521 respectively. After the first locking portion 7a exits the slot 5a, it can enter the avoidance groove 521 to achieve avoidance, thereby preventing the first locking portion 7a from affecting the normal rotation of the bushing 5.

[0042] In an alternative embodiment of the present utility model, as Figures 1 to 8 shown, the positioning plate 54 is provided with card holes 545 corresponding to the ribs 52 one by one. The free ends of the respective ribs 52 are provided with first locking grooves 523 and first elastic barbs 525 that pass through the corresponding card holes 541 and lock the positioning plate 54 in the first locking grooves 523. The first end 3a of the support shaft 3 forms a flange 34, and a snap ring groove 36 is further provided near the second end 3b. The second end 3b sequentially passes through the first shaft hole 501 and the second shaft hole 541 and extends out of the bushing 5 and is clamped in the snap ring groove 36 by a snap ring 38. The flange 34 and the snap ring 38 respectively abut against the outer plate surfaces of the end plate 50 and the positioning plate 54 of the bushing 5. In this embodiment, the positioning plate 54 is clamped in the first locking groove 523 of the rib 52 by the card hole 545, and at the same time, the positioning plate 54 is limited by the first elastic barb 525 to achieve the stable assembly of the positioning plate 54; at the same time, the flange 34 and the snap ring 38 are used to abut and limit against the end plate 50 and the positioning plate 54 of the bushing 5 respectively to achieve the axial positioning of the bushing 5.

[0043] In an alternative embodiment of the present utility model, as Figures 1 to 7 shown, the outer side walls on both sides of the support shaft 3 are provided with the sliding grooves 32. The middle of the locking rod 72 is fixed to the sliding rod 70, and the opposite ends respectively extend out of the corresponding sliding grooves 32 on both sides of the support shaft 3. The ribs 52 are symmetrically distributed with respect to the central axis of the first shaft hole 501. In this embodiment, the opposite ends of the locking rod 72 extend out of the sliding grooves 32 on both sides of the support shaft 3, and the locking rod 72 locks the bushing 5 symmetrically from both sides, with a better symmetrical locking effect and strong stability.

[0044] In an alternative embodiment of the present utility model, as Figure 1 shown, a through hole 723 is formed in the middle of the locking rod 72. One end of the sliding rod 70 inserted into the central hole 30 is provided with a second locking groove 701 near the end, and the end is provided with a second elastic barb 703. The sliding rod 70 locks the locking rod 72 in the second locking groove 701 by passing the second elastic barb 703 through the through hole 723 on the locking rod 72; alternatively, a threaded hole is formed in the middle of the locking rod 72, and the end of the sliding rod 70 is provided with an external thread and is correspondingly screwed into the threaded hole of the locking rod 72. In this embodiment, the locking rod 72 is sleeved in the second locking groove 701 of the sliding rod 70 by using the through hole 723, and the positioning of the locking rod 72 is realized by using the second elastic barb 703. The assembly structure of the locking rod 72 and the sliding rod 70 is simple and convenient for disassembly and assembly.

[0045] In an alternative embodiment of the present utility model, as Figure 1 、 Figures 4 to 5 shown, a large head 705 is further formed at one end of the sliding rod 70 outside the central hole 30. A stop boss 301 is formed by a radial protrusion on the hole wall of the central hole 30. The elastic return member 9 is a helical compression spring sleeved on the sliding rod 70 and having opposite ends respectively abutted against the large head 705 and the stop boss 301. In this embodiment, by providing the stop ring 301 and the large head 705, the elastic return member 9 is correspondingly sleeved on the sliding rod 70, which facilitates the installation of the elastic return member 9.

[0046] In specific implementation, the stop boss 301 may be a continuous annular convex ring or several convex structures symmetrically and evenly discretely distributed in the circumferential direction of the central hole 30.

[0047] In an alternative embodiment of the present utility model, as Figure 9As shown, a flange 34 is formed at the first end 3a of the support shaft 3. A positioning groove 341 penetrating the flange 34 is formed on the flange 34. The clutch member 7 includes a main body portion 74 disposed outside the flange 34 and a positioning arm 76 that extends axially parallel to the support shaft 3 from one side of the main body portion 74 toward the flange 34 and whose free end passes through the positioning groove 341. The first locking portion 7a is provided at the free end of the positioning arm 76. The first locking portion 5a is a slot correspondingly formed on the sleeve 5. The elastic reset member 9 is disposed between the flange 34 and the main body portion 74. In this embodiment, the clutch member 7 includes the main body portion 74 and the positioning arm 76. By sliding the positioning arm 76 in the positioning groove 341 on the flange 34 of the support shaft 3, the sliding of the clutch member 7 along the axis of the support shaft 3 can also be achieved. Moreover, the main body portion 74 can also abut against the support frame 1 prior to the first end 3a of the support shaft 3, so as to achieve telescopic movement, and further drive the first locking portion 5a to relatively enter and exit the slot 5a on the sleeve 5.

[0048] In specific implementation, for the convenience of assembling the clutch member 7, the first locking portion 7a can be assembled at the free end of the positioning arm 76 after the sleeve 5 is sleeved outside the support shaft 3, for example: a screw or a pin; at the same time, the first locking portion 7a can also abut against the bottom wall of the slot 5a to prevent the clutch member 7 from disengaging from the support shaft 3.

[0049] On the other hand, an embodiment of the present invention provides a roller shutter, which includes a winding cylinder A, a support frame 1 for being installed on the walls on both sides of the top of the window, a spring driver B assembled in the winding cylinder A, and a winding cylinder mounting device provided at at least one end of the winding cylinder A. The winding cylinder A mounting device is the winding cylinder mounting device as described in the above embodiment. This embodiment facilitates disassembly, assembly, and maintenance.

[0050] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present invention. All of these fall within the protection scope of the present invention.

Claims

1. A rolling curtain winding cylinder mounting device for mounting the winding cylinder of a rolling curtain to a corresponding support frame, the device comprising: A support shaft having a first end for fixedly assembling to the support frame and a second end opposite thereto for inserting into one end of the winding cylinder and fixedly connecting to the mandrel of the spring driver of the rolling curtain; And A bushing plugged and fixed to the end of the winding cylinder and sleeved outside the support shaft; Characterized in that the device further comprises: A clutch member slidably assembled on the support shaft and relatively fixed to the support shaft in the circumferential direction but relatively slidable in the axial direction. The clutch member is further provided with a first locking portion that moves back and forth between a locked position and an unlocked position as the clutch member slides. Both the locked position and the unlocked position are located between the first end and the second end of the support shaft, and the locked position is closer to the first end than the unlocked position. One end of the clutch member protrudes from the end face of the first end of the support shaft, and under the reverse push of the support frame, the first locking portion is moved to the unlocked position. A plurality of second locking portions are provided on the bushing corresponding to the locked position, which are evenly distributed in the circumferential direction and are used to selectively cooperate with the first locking portion moved to the locked position to lock the clutch member and the bushing to each other in the circumferential direction; and An elastic reset member disposed between the support shaft and the clutch member for driving the clutch member to slide so that the first locking portion is moved to the locked position.

2. The rolling curtain winding cylinder mounting device according to claim 1, wherein, A central hole extending along the axial direction of the support shaft and penetrating through the end face of the first end is formed at the axis of the support shaft. A chute parallel to the central hole and having a bottom connected to the central hole is formed on the side wall of the support shaft. Opposite ends of the chute are both closed and respectively correspond to the locked position and the unlocked position. The clutch member includes a slide rod correspondingly inserted into the central hole and a locking rod fixed to one end of the slide rod located in the central hole and having an outer end as the first locking portion and protruding through the chute. The second locking portion is a slot correspondingly formed on the bushing. A guiding surface for guiding the first locking portion to slide into the slot is provided on one side surface of the first locking portion facing the second locking portion.

3. The roller blind winding cylinder mounting device according to claim 2, characterized in that, The bushing includes an end plate having a first shaft hole at the center for the corresponding passage of the support shaft, and a rib extending outwardly from one side plate surface of the end plate parallel to the central axis of the first shaft hole. The ribs are evenly distributed in the circumferential direction around the first shaft hole, and a slot is formed between any two adjacent ribs.

4. The roller blind winding tube mounting device according to claim 3, characterized in that, The bushing further includes a positioning plate fixed to the free ends of each rib. A second shaft hole for the passage of the support shaft is formed at the center of the positioning plate, and a positioning card slot adapted to the inner wall of the winding cylinder is provided on the periphery. The inner edge of the rib is stepped, and the end closer to the end plate is closer to the central axis of the first shaft hole than the end farther from the end plate. The space between any two ribs is formed by the end closer to the end plate as the slot and the end farther from the end plate as a clearance groove for correspondingly avoiding the first locking portion.

5. The roller blind winding cylinder mounting device according to claim 4, characterized in that, The positioning plate is provided with clamping holes corresponding to the rib strips one by one, and the free ends of the rib strips are each provided with a first locking groove and a first elastic barb that passes through the corresponding clamping hole and locks the positioning plate in the first locking groove; the first end of the support shaft forms a flange plate and is also provided with a snap ring groove near the second end. The second end passes through the first shaft hole and the second shaft hole in sequence and extends out of the shaft sleeve, and is clamped in the snap ring groove by a snap ring. The flange plate and the snap ring respectively abut against the end plate of the shaft sleeve and the outer side plate of the positioning plate.

6. The rolling curtain winding cylinder mounting device according to claim 3, characterized in that, The outer side walls on the opposite sides of the support shaft are each provided with the sliding grooves. The middle part of the locking rod is fixed on the sliding rod, and the opposite ends respectively extend out of the sliding grooves on the corresponding sides of the support shaft. The rib strips are symmetrically distributed with respect to the central axis of the first shaft hole.

7. The rolling curtain winding cylinder mounting device according to claim 6, characterized in that, A through hole is provided in the middle of the locking rod. One end of the sliding rod inserted into the central hole is provided with a second locking groove near the end, and the end is provided with a second elastic barb. The sliding rod locks the locking rod in the second locking groove with the second elastic barb passing through the through hole on the locking rod; alternatively, a threaded hole is provided in the middle of the locking rod, and the end of the sliding rod is provided with an external thread and is correspondingly screwed into the threaded hole of the locking rod.

8. The rolling curtain winding cylinder installation device according to claim 2, wherein One end of the sliding rod located outside the central hole further forms a large head. A stop boss protrudes radially from the hole wall of the central hole. The elastic reset member is a helical compression spring sleeved on the sliding rod and abutting against the large head and the stop boss at opposite ends respectively.

9. The roller blind winding cylinder mounting device according to claim 1, characterized in that, The first end of the support shaft forms a flange plate. A positioning groove penetrating the flange plate is provided on the flange plate. The clutch member includes a main body portion provided on the outer side of the flange plate and a positioning arm that extends parallel to the axial direction of the support shaft from one side of the main body portion toward the flange plate and the free end of which passes through the positioning groove. The first locking portion is provided at the free end of the positioning arm. The second locking portion is a slot correspondingly formed on the shaft sleeve. The elastic reset member is provided between the flange plate and the main body portion.

10. A roller blind, comprising a winding cylinder, a support frame for mounting on the walls on both sides of the top of a window, a spring drive assembled in the winding cylinder, and a winding cylinder mounting device provided at at least one end of the winding cylinder, characterized in that, The winding cylinder mounting device is the winding cylinder mounting device according to any one of claims 1-9.

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