Roller blind and roller tube mounting device thereof

Abstract

Embodiments of the present application provide a roller blind and a roller tube mounting device thereof. The device is used for mounting a roller tube onto a support bracket, and comprises: a support shaft and a shaft sleeve; a clutch slidably assembled on the support shaft and capable of sliding back and forth in the axial direction of the support shaft, wherein one end of the clutch protrudes from the end surface of a first end of the support shaft, the clutch is further provided with first locking portions sliding along with the clutch and moving back and forth between a locking position and an unlocking position, the locking position and the unlocking position are both located between the first end and a second end of the support shaft and the locking position is located closer to the first end than the unlocking position, and a plurality of second locking portions uniformly distributed in a circumferential direction are provided at the position on the shaft sleeve corresponding to the locking position and are used for matching, in the alternative, the first locking portions moved to the locking position so as to lock the clutch and the shaft sleeve in the circumferential direction; and an elastic reset member arranged between the support shaft and the clutch and used for driving the clutch to slide such that the first locking portions can move to the locking position. The present embodiments allow for easy disassembly, assembly, and maintenance.

Description

Roller blind and winding drum mounting device thereof TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of window blind accessories, in particular to a roller blind and a winding drum mounting device thereof. BACKGROUND

[0002] The conventional roller blind comprises a winding drum, a curtain cloth wound outside the winding drum, a spring driver arranged inside the winding drum for driving the winding drum to rotate to wind or unwind the curtain cloth, and a winding drum mounting device for assembling the winding drum to the wall above the top of the window body.

[0003] The existing winding drum mounting device comprises a support frame for fixing to the corresponding wall, a support shaft fixed to one end of the support frame and inserted into the winding drum for transmission connection with the core shaft of the spring driver, and a bushing inserted and fixed to one end of the winding drum and corresponding to the outside of the support shaft, the bushing being fixed relative to the support shaft in the axial direction and being movable relative to the support shaft in the circumferential direction. In order to realize driving, the shell of the spring driver is fixed relative to the winding drum, and when the spring driver outputs power, the core shaft and the shell move relative to each other, and since the core shaft is fixedly connected to the support shaft and remains fixed to the support frame, the shell of the spring driver and the winding drum are correspondingly rotated, realizing power output. In actual production, the spring driver, the support shaft and the bushing are usually pre-assembled into an assembly, and the spiral spring inside the spring driver is pre-wound on the corresponding spring shaft and locked by a pin to prevent the spring from relaxing. When installing the roller blind, the support frame is first fixed to the wall, then the pin is removed and the assembly is integrally installed into the winding drum without relative movement between the shell of the spring driver and the support shaft, and the bushing is correspondingly inserted and fixed to the winding drum, and finally the outer end of the support shaft is fixed relative to the support frame at the corresponding end.

[0004] However, the inventor found in the specific implementation that during the installation process, after the pin is removed, measures must be taken to keep the support shaft and the shell of the spring driver and the winding drum from moving relative to each other in the circumferential direction until the support shaft is fixed to the corresponding support frame, which is relatively troublesome. Moreover, during the use after installation, the user may need to disassemble and reassemble the roller blind, and during the process of removing the support shaft from the support frame and after removal, special attention must be paid to keeping the support shaft and the winding drum from moving relative to each other in the circumferential direction, otherwise the spiral spring will relax due to the lack of locking structure and cannot be used normally, and the user lacks professional tools to reset the spiral spring to the wound state, and can only scrap the spring driver or send it back to the corresponding manufacturer for repair, which is costly. TECHNICAL PROBLEM

[0005] The technical problem to be solved by the embodiments of the present application is to provide a roller blind winding drum mounting device which is convenient to disassemble and maintain.

[0006] The further technical problem to be solved by the embodiments of the present application is to provide a roller blind which is convenient to disassemble and maintain. Solution

[0007] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions: a roller blind winding drum mounting device for mounting a winding drum of a roller blind to a corresponding support frame, the device comprising:

[0008] a support shaft fixedly assembled on the support frame at a first end and inserted into one end of the winding drum and fixedly connected with a core shaft of a spring driver of the roller blind at a second end opposite to the first end; and

[0009] a shaft sleeve fixedly inserted into a terminal end of the winding drum and sleeved on the outside of the support shaft;

[0010] a clutching member slidably assembled on the support shaft and fixedly connected with the support shaft in a circumferential direction and slidably connected with the support shaft in an axial direction, one end of the clutching member protruding from a first end surface of the support shaft, the clutching member further comprising a first locking portion moving back and forth between a locking position and an unlocking position along with the sliding of the clutching member, the locking position and the unlocking position being located between the first end and the second end of the support shaft and the locking position being closer to the first end than the unlocking position, one end of the clutching member protruding from the first end surface of the support shaft being pushed by the support frame to move the first locking portion to the unlocking position, the shaft sleeve being provided with a plurality of second locking portions at the locking position and uniformly distributed in the circumferential direction, the second locking portions being used to selectively cooperate with the first locking portion moved to the locking position to lock the clutching member and the shaft sleeve in the circumferential direction; and

[0011] a resilient reset member arranged between the support shaft and the clutching member and used to drive the clutching member to slide and move the first locking portion to the locking position.

[0012] Further, a center hole extending along the axial direction of the support shaft and penetrating through the first end surface is formed at the axial center of the support shaft, a sliding groove extending parallel to the center hole and having a bottom connected with the center hole is formed on the side wall of the support shaft, the opposite two ends of the sliding groove are closed and correspond to the locking position and the unlocking position respectively, the clutching member comprises a sliding rod inserted into the center hole and a locking rod fixed to one end of the sliding rod located in the center hole and protruding out of the sliding groove as the first locking portion, and the second locking portion is a slot formed on the shaft sleeve, and a guide surface of the first locking portion is arranged on a side surface of the first locking portion facing the second locking portion and used to guide the first locking portion to slide into the slot.

[0013] Further, the shaft sleeve comprises an end plate with a first shaft hole in the center for the support shaft to pass through, and a rib extending outwardly from the side plate surface of the end plate and parallel to the central axis of the first shaft hole, the ribs are uniformly distributed on the periphery of the first shaft hole in the circumferential direction, and the insertion slot is formed between any two adjacent ribs.

[0014] Further, the shaft sleeve further comprises a positioning plate fixed to the free end of each rib, the center of the positioning plate is provided with a second shaft hole for the support shaft to pass through, and the periphery is provided with a positioning clamping groove matched with the inner wall of the winding drum, the inner side edge of the rib is stepped, and the end adjacent to the end plate is closer to the central axis of the first shaft hole than the end away from the end plate, and the space between any two ribs is formed into the insertion slot by the end adjacent to the end plate and is formed into the avoidance slot for avoiding the first locking part by the end away from the end plate.

[0015] Further, the positioning plate is provided with a clamping hole corresponding to each rib, the free end of each rib is provided with a first locking slot and a first elastic barb passing through the corresponding clamping hole to lock the positioning plate in the first locking slot; the first end of the support shaft is formed into a flange, and the second end is provided with a clamping spring groove near the second end, the second end passes through the first shaft hole and the second shaft hole in turn and extends out of the shaft sleeve and is clamped in the clamping spring groove by the clamping spring, and the flange and the clamping spring abut against the outer side surface of the end plate and the positioning plate of the shaft sleeve respectively.

[0016] Further, the outer side wall of the opposite two sides of the support shaft is provided with the sliding groove, the middle part of the locking rod is fixed to the sliding rod and the opposite two ends extend out of the sliding groove of the corresponding side of the support shaft respectively, and the ribs are distributed symmetrically with respect to the central axis of the first shaft hole.

[0017] Further, the middle part of the locking rod is provided with a through hole, one end of the sliding rod inserted into the central hole is provided with a second locking slot near the terminal end and the terminal end is provided with a second elastic barb, the sliding rod is locked in the second locking slot by the second elastic barb passing through the through hole on the locking rod; or, the middle part of the locking rod is provided with a threaded hole, the terminal end of the sliding rod is provided with an external thread and is screwed into the threaded hole of the locking rod correspondingly.

[0018] Further, one end of the sliding rod outside the central hole is further formed into a large head part, the hole wall of the central hole is radially raised to form a stop boss, and the elastic return member is a spiral compression spring abutting against the large head part and the stop boss respectively.

[0019] Further, the first end of the support shaft is formed with a flange plate, the flange plate is provided with a positioning groove penetrating through the flange plate, the clutch member comprises a main body portion arranged outside the flange plate and a positioning arm extending from the main body portion towards the flange plate in parallel with the support shaft and the free end of the positioning arm penetrates through the positioning groove, the first locking portion is arranged at the free end of the positioning arm, the second locking portion is an insertion groove correspondingly formed on the shaft sleeve, and the elastic reset member is arranged between the flange plate and the main body portion.

[0020] In another aspect, in order to solve the above further technical problem, the application provides the following technical scheme: a roller shutter, comprising a winding drum, a support frame for being mounted on the wall on both sides of the top of a window body, a spring driver assembled in the winding drum, and a winding drum mounting device arranged at least one end of the winding drum, wherein the winding drum mounting device is the winding drum mounting device according to any one of the above. Beneficial effects

[0021] After the above technical scheme is adopted, the application has at least the following beneficial effects: the clutch member and the elastic reset member are added, the clutch member is kept in the locking position under the action of the elastic reset member, the first locking portion on the clutch member cooperates with a corresponding one of the plurality of second locking portions on the shaft sleeve to lock the clutch member and the shaft sleeve in the circumferential direction, and then 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 with the mandrel of the spring driver of the roller shutter to facilitate the reassembly of the whole into the winding drum to form a preassembled body, at this time, the shaft sleeve and the housing of the spring driver are relatively fixed to the winding drum, so that the mandrel and the housing of the spring driver cannot rotate relative to each other, and it is ensured that the spiral spring in the spring driver cannot relax; when the preassembled body is reinstalled on the corresponding support frame, the first end of the clutch member protrudes from the end face of the first end of the support shaft and can move towards the inside of the winding drum under the counter thrust of the support frame, so that the first locking portion on the clutch member and the second locking portion are unlocked, and the winding drum can rotate relative to the support shaft under the drive of the spring driver to realize the normal lifting of the curtain cloth of the roller shutter. When the winding drum needs to be removed again, the support shaft can be removed from the support frame in the conventional disassembly mode, and once the clutch member is away from the support frame, it will automatically return to the position under the action of the elastic force of the elastic reset member, so that the first locking portion returns to the locking position and is locked with the second locking portion, which can effectively prevent the spiral spring in the spring driver from relaxing and being scrapped or requiring professional maintenance, and the disassembly and assembly operations do not require other tools for locking the spiral spring, which is very convenient. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a split structure schematic view of an optional embodiment of the winding drum mounting device of the application and the winding drum.

[0023] Figure 2 is a split structure schematic diagram of an alternative embodiment of the roller blind winding cylinder mounting device of the present application and the winding cylinder and support frame.

[0024] Figure 3 is an assembled structure schematic diagram of an alternative embodiment of the roller blind winding cylinder mounting device of the present application.

[0025] Figure 4 is a cross-sectional structure schematic diagram of the length central axis surface of the front edge of an alternative embodiment of the roller blind winding cylinder mounting device of the present application and the support frame before assembly.

[0026] Figure 5 is a cross-sectional structure schematic diagram of the length central axis surface of the rear edge of an alternative embodiment of the roller blind winding cylinder mounting device of the present application and the support frame after assembly.

[0027] Figure 6 is a cross-sectional structure schematic diagram of the length central axis surface of the front edge linkage bolt of an alternative embodiment of the roller blind winding cylinder mounting device of the present application and the support frame after assembly.

[0028] Figure 7 is a cross-sectional structure schematic diagram of the length central axis surface of the rear edge linkage bolt of an alternative embodiment of the roller blind winding cylinder mounting device of the present application and the support frame after assembly.

[0029] Figure 8 is a structure schematic diagram of the shaft sleeve of an alternative embodiment of the roller blind winding cylinder mounting device of the present application.

[0030] Figure 9 is a cross-sectional structure schematic diagram of another alternative embodiment of the roller blind winding cylinder mounting device of the present application. Embodiments of the present application

[0031] The present application will be described in further detail below with reference to the drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are merely intended to explain the present application and are not intended to limit the present application, and the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] As shown in Figures 1-8, an alternative embodiment of the present application provides a roller blind winding cylinder mounting device for mounting the winding cylinder A of a roller blind to a corresponding support frame 1, comprising:

[0033] a support shaft 3 fixedly assembled on the support frame 1 at a first end 3a and inserted into one end of the winding cylinder A and fixedly connected with the core shaft C of the spring driver B of the roller blind at a second end 3b opposite to the first end 3a; and

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

[0035] A clutch 7 is slidably assembled on the support shaft 3 and is fixed relative to the support shaft 3 in the circumferential direction and is axially relatively slidable, one end of the clutch 7 protrudes from the end face of the first end 3a of the support shaft 3, and the clutch 7 is further provided with a first locking portion 7a that moves back and forth between a locking position and an unlocking position as the clutch 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 7 protrudes from the end face of the first end 3a of the support shaft 3, and under the counter-thrust of the support frame 1, the first locking portion 7a is moved to the unlocking position, and a plurality of first locking portions 5a that are uniformly distributed in the circumferential direction and are used to selectively cooperate with the first locking portion 7a that is moved to the locking position to lock the clutch 7 and the sleeve 5 in the circumferential direction are provided on the sleeve 5 at the locking position; and

[0036] An elastic reset member 9 is arranged between the support shaft 3 and the clutch 7 to drive the clutch 7 to slide and move the first locking portion 7a to the locking position.

[0037] The clutch 7 is kept in the locking position under the action of the elastic reset member 9, so that the first locking portion 7a on the clutch 7 cooperates with a corresponding one of the plurality of second locking portions 5a on the sleeve 5 to lock the clutch 7 and the sleeve 5 in the circumferential direction, and then the sleeve 5 and the support shaft 3 are fixed relative to each other in the circumferential direction; the second end 3b of the support shaft 3 is assembled and connected with the core shaft C of the spring driver B of the roller shutter, which facilitates the reassembly of the entire preassembly into the winding drum A, at this time, the sleeve 5 and the housing of the spring driver B are fixed relative to the winding drum A, so that the core shaft C and the housing of the spring driver B cannot rotate relative to each other, ensuring that the spiral spring in the spring driver B does not relax; when the assembly personnel reassemble the preassembly to the corresponding support frame 1, the end of the clutch 7 protruding from the end face of the first end 3a of the support shaft 3 can move to the inside of the winding drum A under the counter-thrust of the support frame 1, so that the first locking portion 7a on the clutch 7 and the second locking portion 5a are unlocked, and the winding drum A can rotate relative to the support shaft 3 under the drive of the spring driver B to realize the normal lifting of the roller shutter fabric. When the winding drum A needs to be removed again, it can be removed from the support frame 1 in the conventional disassembly mode, and once the clutch 7 is removed from the support frame 1, it will automatically reset under the elastic force of the elastic reset member 9, so that the first locking portion 7a returns to the locking position and is locked with the second locking portion 5a, which can effectively prevent the spiral spring in the spring driver B from relaxing and being scrapped or requiring professional maintenance, and the disassembly and assembly operations do not require other tools for locking the spiral spring, which is very convenient.

[0038] In the embodiment, the support shaft 3 and the support frame 1 can be assembled and fixed by screwing, hooking, buckling or inserting, etc. In the embodiment shown in Figs. 1-8, the hooking is adopted.

[0039] In an optional embodiment of the present application, as shown in Figs. 1-7, the support shaft 3 is provided with a central hole 30 extending along the axial direction of the support shaft 3 and penetrating the first end 3a, and the side wall of the support shaft 3 is provided with a sliding groove 32 extending parallel to the central hole 30 and having a bottom communicating with the central hole 30, the opposite ends of the sliding groove 32 are closed and correspond to the locking position and the unlocking position respectively, the clutch 7 comprises a sliding rod 70 inserted into the central hole 30 and a locking rod 72 fixed to one end of the sliding rod 70 in the central hole 30 and extending out of the sliding groove 32 with the outer end as the first locking part 7a, and the second locking part 5a is a slot formed on the shaft sleeve 5, and the side of the first locking part 7a facing the second locking part 5a is provided with a guide surface 721 guiding the first locking part 7a to slide into the slot 5a. In this embodiment, the sliding rod 70 slides in the central hole 30 of the support shaft 3, thereby driving the locking rod 72 to move back and forth at the two ends of the sliding groove 32, the outer end of the locking rod 72 forms the first locking part 7a, and the outer end of the locking rod 72 is movably inserted into the slot 5a forming the second locking part 5a, thereby achieving the active unlocking and locking of the shaft sleeve 5 and the support shaft 3. In addition, since the second locking part 5a is symmetrically arranged around the central axis of the shaft sleeve 5, the outer end of the locking rod 72 cannot be accurately aligned with the slot 5a, therefore, in this embodiment, the guide surface 721 is provided, when the outer end of the locking rod 72 cannot be accurately aligned with the slot 5a, under the elastic force of the elastic return member 9 and the guiding action of the guide surface 721, the end of the locking rod 72 can be gradually inserted into the slightly misaligned slot 5a, thereby ensuring the effective locking of the shaft sleeve 5. In the embodiment, as shown in Fig. 1, the guide surface 721 comprises a guide arc surface in the middle and guide inclined surfaces on both sides of the guide arc surface.

[0040] In an optional embodiment of the present application, as shown in Figs. 1-8, the shaft sleeve 5 comprises an end plate 50 provided with a first shaft hole 501 for the support shaft 3 to pass through, and a rib 52 extending outwardly and parallel to the central axis of the first shaft hole 501 from one side surface of the end plate 50, and the ribs 52 are uniformly distributed around the periphery of the first shaft hole 501, and the slots 5a are formed between any two adjacent ribs 52. In this embodiment, the shaft sleeve 5 comprises the end plate 50 and the ribs 52, and the structure is simple, the slots 5a are formed between the ribs 52, thereby facilitating the manufacturing and design of the slots 5a.

[0041] In an optional embodiment of the present application, as shown in FIGS. 1-8, the shaft sleeve 5 further comprises a positioning plate 54 fixed to the free end of each of the ribs 52, the center of the positioning plate 54 is provided with a second shaft hole 541 through which the support shaft 3 passes, and the periphery is provided with a positioning clamping groove 543 matched with the inner wall of the winding drum A, the inner side edge of the rib 52 is stepped and closer to the central axis of the first shaft hole 501 at the end adjacent to the end plate 50 than at the end away from the end plate 50, and the space between any two ribs 52 is formed into the insertion slot 5a at the end adjacent to the end plate 50 and into the avoidance slot 521 at the end away from the end plate 50, which avoids the first locking part 7a. In this embodiment, the shaft sleeve 5 is further provided with the positioning plate 54 fixed to the free end of each of the ribs 52, and the structure of the shaft sleeve 5 is more stable; moreover, the space between any two ribs 52 is respectively formed into the insertion slot 5a and the avoidance slot 521, so that after the first locking part 7a exits the insertion slot 5a, it can enter the avoidance slot 521 to achieve avoidance, thereby avoiding the influence of the first locking part 7a on the normal rotation of the shaft sleeve 5.

[0042] In an optional embodiment of the present application, as shown in FIGS. 1-8, the positioning plate 54 is provided with a clamping hole 545 corresponding to each of the ribs 52, the free end of each of the ribs 52 is provided with a first locking slot 523 and a first elastic barb 525 passing through the corresponding clamping hole 541 to lock the positioning plate 54 in the first locking slot 523; the first end 3a of the support shaft 3 forms a flange plate 34 and is further provided with a clamping spring groove 36 near the second end 3b, the second end 3b passes through the first shaft hole 501 and the second shaft hole 541 in turn and extends out of the shaft sleeve 5 and is clamped in the clamping spring groove 36 by the clamping spring 38, and the flange plate 34 and the clamping spring 38 abut the outer side surface of the end plate 50 and the positioning plate 54 of the shaft sleeve 5, respectively. In this embodiment, the positioning plate 54 is clamped in the first locking slot 523 of the rib 52 by the clamping hole 545, and the positioning plate 54 is limited by the first elastic barb 525, achieving stable assembly of the positioning plate 54; and the flange plate 34 and the clamping spring 38 abut and limit the end plate 50 and the positioning plate 54 of the shaft sleeve 5, respectively, achieving axial positioning of the shaft sleeve 5.

[0043] In an optional embodiment of the present application, as shown in FIGS. 1-7, the outer side wall of the support shaft 3 on opposite sides is provided with the sliding groove 32, the middle part of the locking rod 72 is fixed to the sliding rod 70 and the opposite ends extend out of the sliding groove 32 on the corresponding side of the support shaft 3, and the ribs 52 are symmetrically distributed relative 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 symmetrically locks the shaft sleeve 5 from both sides, achieving better symmetrical locking effect and strong stability.

[0044] In an optional embodiment of the present application, as shown in FIG. 1, a middle portion of the locking rod 72 is provided with a through hole 723, an end of the slide rod 70 inserted into the central hole 30 is provided with a second locking groove 701 near the end and a second elastic hook 703 at the end, the slide rod 70 is locked with the second elastic hook 703 passing through the through hole 723 of the locking rod 72 and locking the locking rod 72 in the second locking groove 701; or, a middle portion of the locking rod 72 is provided with a threaded hole, an end of the slide rod 70 is provided with external threads and is screwed into the threaded hole of the locking rod 72. In this embodiment, the locking rod 72 is sleeved on the second locking groove 701 of the slide rod 70 by the through hole 723, and the positioning of the locking rod 72 is realized by the second elastic hook 703, the assembly structure of the locking rod 72 and the slide rod 70 is simple, and the locking rod 72 and the slide rod 70 are convenient to disassemble and assemble.

[0045] In an optional embodiment of the present application, as shown in FIG. 1, FIG. 4 and FIG. 5, an end of the slide rod 70 located outside the central hole 30 is further formed with a large head 705, a hole wall of the central hole 30 is radially protruded to form a stop boss 301, and the elastic return member 9 is a spiral compression spring sleeved on the slide rod 70 and abutting against the large head 705 and the stop boss 301 at opposite ends. In this embodiment, by providing the stop boss 301 and the large head 705, the elastic return member 9 is correspondingly sleeved on the slide rod 70, and the installation of the elastic return member 9 is facilitated.

[0046] In specific implementation, the stop boss 301 can be a continuous annular protruding ring, or can be several protruding structures symmetrically and uniformly distributed on the circumference of the central hole 30.

[0047] In an optional embodiment of the present application, as shown in FIG. 9, the first end 3a of the support shaft 3 is formed with a flange plate 34, the flange plate 34 is provided with a positioning groove 341 penetrating the flange plate 34, the clutch member 7 includes a main body 74 arranged outside the flange plate 34 and a positioning arm 76 extending from the main body 74 towards one side of the flange plate 34 in parallel with the axial direction of the support shaft 3 and the free end of the positioning arm 76 penetrating the positioning groove 341, the first locking portion 7a is arranged at the free end of the positioning arm 76, the first locking portion 5a is an insertion groove correspondingly formed on the shaft sleeve 5, and the elastic return member 9 is arranged between the flange plate 34 and the main body 74. In this embodiment, the clutch member 7 includes the main body 74 and the positioning arm 76, the positioning arm 76 is slid in the positioning groove 341 of the flange plate 34 of the support shaft 3, and the sliding of the clutch member 7 in the axial direction of the support shaft 3 is also realized, and the main body 74 can be first abutted against the support frame 1 from the first end 3a of the support shaft 3, so that the telescopic movement is realized, and the first locking portion 5a is driven to relatively enter and exit the insertion groove 5a on the shaft sleeve 5.

[0048] In a specific implementation, for the convenience of assembling the clutch 7, the first locking part 7a can be assembled on the free end of the positioning arm 76 after the sleeve 5 is sleeved on the outside of the support shaft 3, for example, a screw or a bolt; meanwhile, the first locking part 7a can also abut against the bottom wall of the slot 5a to prevent the clutch 7 from being detached from the support shaft 3.

[0049] On the other hand, the embodiment of the present application provides a roller shutter, which comprises a winding drum A, a support frame 1 for being installed on the wall on both sides of the top of a window body, a spring driver B assembled in the winding drum A, and a winding drum mounting device arranged at least one end of the winding drum A, wherein the winding drum A mounting device is the winding drum mounting device as described in the above embodiment. The embodiment can facilitate the disassembly and maintenance.

[0050] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the specific implementation described above, and the specific implementation described above is only illustrative but not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims, and these all belong to the protection scope of the present application.

Claims

1. A roller tube mounting device for mounting a roller tube of a roller shutter to a corresponding support frame, the device comprising: a support shaft having a first end configured to be fixedly assembled to the support frame and a second end opposite to the first end configured to be inserted into one end of the roller tube and fixedly connected to a core shaft of a spring driver of the roller shutter; and a sleeve fixedly connected to the other end of the roller tube and sleeved outside the support shaft; characterized in that the device further comprises: a clutch slidably assembled to the support shaft and fixedly connected to the support shaft in a circumferential direction and slidably connected to the support shaft in an axial direction, the clutch further comprising a first locking part movably arranged on the clutch and moving between a locking position and an unlocking position along with the sliding of the clutch, the locking position and the unlocking position being located between the first end and the second end of the support shaft and the locking position being closer to the first end than the unlocking position, one end of the clutch protruding from the first end of the support shaft and moving the first locking part to the unlocking position under the thrust of the support frame, the sleeve being provided with a plurality of second locking parts corresponding to the locking position and uniformly distributed in the circumferential direction, the second locking parts being configured to selectively cooperate with the first locking part moved to the locking position to lock the clutch and the sleeve in the circumferential direction; and a resilient reset member arranged between the support shaft and the clutch and configured to drive the clutch to slide and move the first locking part to the locking position. The support shaft is provided with a central hole extending along the axial direction of the support shaft and penetrating the first end, and the side wall of the support shaft is provided with a sliding groove extending parallel to the central hole and having a bottom connected to the central hole, the opposite ends of the sliding groove being closed and corresponding to the locking position and the unlocking position respectively, the clutch comprising a sliding rod inserted into the central hole and a locking rod fixed to one end of the sliding rod located in the central hole and protruding out of the sliding groove as the first locking part, the second locking part being a slot formed on the sleeve, and the side of the first locking part facing the second locking part being provided with a guide surface guiding the first locking part to slide into the slot.

2. The roller shade roller tube mounting device of claim 1, wherein, The sleeve comprises an end plate provided with a first shaft hole corresponding to the support shaft, and a rib extending outwardly from one side of the end plate parallel to the central axis of the first shaft hole, the ribs being uniformly distributed in the circumferential direction outside the first shaft hole and forming the slots between any two adjacent ribs.

3. The roller shade roller tube mounting device of claim 2, wherein, The sleeve further comprises a positioning plate fixed to the free end of each rib, the positioning plate being provided with a second shaft hole corresponding to the support shaft at the center and a positioning slot corresponding to the inner wall of the roller tube at the periphery, the inner side of the rib being stepped and the end adjacent to the end plate being closer to the central axis of the first shaft hole than the end away from the end plate, the space between any two ribs being formed into the slot by the end adjacent to the end plate and formed into an avoidance slot avoiding the first locking part by the end away from the end plate.

4. The roller shade roller tube mounting device of claim 3, wherein, ​ 5. The roller shade roller tube mounting device of claim 4, wherein, The positioning plate is provided with a clamping hole corresponding to each of the ribs, the free end of each rib is provided with a first locking groove and a first elastic barb which is inserted through the corresponding clamping hole to lock the positioning plate in the first locking groove; the first end of the supporting shaft is formed with a flange, and the second end is provided with a clamping spring groove near the second end, the second end is inserted through the first shaft hole and the second shaft hole and extends out of the shaft sleeve and is clamped in the clamping spring groove, and the flange and the clamping spring abut against the end plate of the shaft sleeve and the outer side plate surface of the positioning plate, respectively.

6. The roller shade roller tube mounting device of claim 3, wherein, The outer side wall of the opposite sides of the supporting shaft is provided with the sliding groove, the middle part of the locking rod is fixed on the sliding rod and the opposite ends are respectively extended from the sliding groove of the corresponding side of the supporting shaft, and the ribs are symmetrically distributed with respect to the central axis of the first shaft hole.

7. The roller shade roller tube mounting device of claim 6, wherein, The middle part of the locking rod is provided with a through hole, one end of the sliding rod inserted into the central hole is provided with a second locking groove near the end and is provided with a second elastic barb at the end, the sliding rod is locked in the second locking groove by the second elastic barb inserted through the through hole of the locking rod; or, the middle part of the locking rod is provided with a threaded hole, and the end of the sliding rod is provided with an external thread and is screwed into the threaded hole of the locking rod.

8. The roller shade roller tube mounting device of claim 2, wherein, One end of the sliding rod outside the central hole is also formed with a large head part, the hole wall of the central hole is radially protruded to form a stop boss, and the elastic return member is a spiral compression spring which is sleeved on the sliding rod and abuts against the large head part and the stop boss at opposite ends.

9. The roller shade roller tube mounting device of claim 1, wherein, The first end of the supporting shaft is formed with a flange, the flange is provided with a positioning groove penetrating the flange, the clutch member includes a main body part provided outside the flange and a positioning arm extending in parallel with the supporting shaft from one side of the main body part towards the flange and penetrating the positioning groove at the free end, the first locking part is provided at the free end of the positioning arm, the second locking part is a insertion slot correspondingly formed on the shaft sleeve, and the elastic return member is arranged between the flange and the main body part.

10. A roller blind comprising a winding drum, a support frame for mounting on a wall on both sides of the top of a window, a spring drive assembled in the winding drum, and a winding drum mounting device provided at at least one end of the winding drum, 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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